41results about How to "Easy to wash and remove" patented technology

The invention discloses a catalyst for the complete methanation of synthesis gas from coal and a preparation method thereof. The catalyst is prepared by using NiO as an active component, one or two of rare earth metal oxides La2O3, CeO2 and Sm2O3 as a first assistant, one of alkali oxides CaO, BaO and SrO as a second assistant, and magnesium aluminate spinel formed by mixing Al2O3 with MgO as a carrier, and the obtained catalyst contains the ingredients in percent by mass as below: 20% to 70% of NiO, 15% to 50% of Al2O3, 6% to 30% of MgO, 5% to 20% of the rare earth metal oxide-type first assistant, 1% to 8% of the alkali oxide-type second assistant and 1% to 3% of graphite; the catalyst provided by the invention has the advantages of high catalytic activity, high mechanical strength, good thermal stability, strong carbon deposition resistance, strong resistance to toxicants in feed gas, excellent low temperature activity and low cost.

The invention discloses a catalyst used in a coal natural gas methanation reactor. The catalyst comprises the following components in percentage by weight: 10-40% of an active component, 40-75% of a carrier, 5-20% of a first auxiliary agent, 2-15% of a second auxiliary agent and 2% of graphite, wherein the active component is NiO; the carrier is Al2O3; the first auxiliary agent is one or two of rare earth metal oxide La2O3, CeO2 or Sm2O3; and the second auxiliary agent is CuO. The preparation method of the catalyst comprises the following steps: preparing a mixed solution, heating and precipitating, filtering the precipitate, washing a filter cake, drying, baking and shaping. The obtained catalyst has the advantages of simple components, low cost, good catalytic activity and high stability, and is easy to prepare.

The invention discloses a method for preparing nano metal oxides and nano metal powder. The method comprises the steps that: nano potassium sulphate is used for dispersing and isolating metal oxide precursor particles in xylene, a drying material is subjected to high-temperature calcination and decomposition after centrifugal precipitation, after washing, the dispersed nano metal oxides can be obtained, and the calcined product is secondarily calcined in a reducing atmosphere and the dispersed nano metal powder can be obtained after water washing. The method for preparing the nano metal oxidesand the nano metal powder can rapidly prepare nano metal oxides or nano metal powder with good dispersion and perfect crystals in batch.

The invention relates to a simple intercalation stripping method for a molybdenum disulfide nanosheet. According to the method for obtaining the molybdenum disulfide nanosheet through simple intercalation stripping, high-purity molybdenum disulfide with a micron-grade particle size is adopted as a raw material, and the method comprises the following steps: 1) using magnesium chloride and sodium sulfide as intercalation agents, mixing the molybdenum disulfide, the magnesium chloride, the sodium sulfide and deionized water according to a mass ratio of (50-100):1:(0.5-1):600, and performing stirring to obtain a disperse system; 2) and putting the disperse system prepared in the step 1) into a high-pressure reaction kettle for heating to 180-200 DEG C, performing intercalation treatment, wherein the intercalation treatment lasts for 3-6 hours; 3) cooling the disperse system obtained in the step 2) to a room temperature, and then performing stripping by ultrasonic treatment, wherein the ultrasonic stripping lasts for 30-60 minutes; and 4) performing centrifugal separation on the disperse system obtained in the step 3), and then performing washing with deionized water, and performing vacuum drying to obtain the molybdenum disulfide nanosheet powder.

The invention provides a method for a preparing nano molecular sieve by coordinating amino acid assisting and sectional crystallizing through a concentrated gel system, and belongs to the technical field of molecular sieve preparation. The method is characterized in that a traditional hydro-thermal synthesis mode is carried out; tetrapropylammonium hydroxide or tetraethylammonium hydroxide or Na<+> is used as a template; amino acid is added to control crystal nucleation and growth of the molecular sieve, and the sectional crystallizing reaction is carried out through the concentrated gel system, so that the synthesized nano molecular sieve is good in crystal, high in micropore specific surface area, high in external specific surface area and large in micropore volume; the synthesized Beta type molecular sieve is 9.5 nm in average size; an Silicalite-1 type molecular sieve is 30nm in average size; an A type molecular sieve is 50nm in average size. The nano molecular sieve is high in crystalline and monodispersity, and has a certain industrial application prospect.

The invention provides a clean production method for preparing a bisphenol antioxidant. Alkyl phenol and aldehydes react under the action of a catalyst to prepare the bisphenol antioxidant. The method comprises the following steps: sequentially adding certain amounts of alkyl substituted phenol and lower alcohol solvents and the catalyst into a reaction kettle; replacing by introducing nitrogen gas, starting mixing, heating, slowly and dropwisely adding formalin, and keeping the reflux reaction to generate massive crystals; replacing by introducing nitrogen gas, supplementing a right amount of alcohol solvent, and continuing the reaction for some time; and neutralizing with organic acid, cooling, filtering to obtain the white or light yellow solid powdery product, and distilling the filtrate to recycle the solvent for cyclic utilization. The production process does not need water to participate into the reaction, can not generate wastewater, has the advantages of short production cycle, high product purity and high yield, is easy to control, and can overcome the defects in the prior art.

The invention provides a method for preparing porous cerium-based oxide from a water-soluble cerium precursor. To be specific, the water-soluble cerium precursor is obtained through reaction of cerium salt and concentrated sulfuric acid in absolute ethyl alcohol; porous cerium dioxide is obtained in the following way: the cerium precursor and an ethanol solution of NaOH have solid-liquid interface reaction, and then washing is carried out to remove the cerium precursor not completely reacted; the cerium-based composite oxide is obtained through reaction of porous cerium dioxide and an ethanol solution of metal salt under the heating condition. During the preparation process of the cerium precursor, the cerium precursor with different shapes can be obtained through changing the experiment parameters including concentration of sulfuric acid, reaction temperature, reaction time and the like to further adjust and control the shape of the porous cerium-based oxide. According to the invention, the method is simple and practical, the controllability is high, the pollution is small, the cost is low, and certain universality is realized. The prepared product has a mesoporous structure; the synergistic effect among all components in the composite oxide enables the components to express superior catalytic activity during CO catalytic reaction.

The invention provides a method for preparing nano YAG (yttrium aluminum garnet) fluorescent powder. Carbonate precursor particles of YAG are dispersed and isolated with nano potassium sulfate in xylene, after centrifugal precipitation, precipitates are dried and then calcined at the high temperature, a calcined product is secondarily calcined in the reduction atmosphere, and high-dispersity nanoYAG fluorescent powder with good light emitting performance can be obtained after water washing. By means of the method, the nano YAG fluorescent powder with good dispersity and perfect crystals can be rapidly prepared in batches. The fluorescent powder can be made into transparent fluorescent gelatin, light scattering loss is eliminated, and the problem of inconsistency of light color of a white-light LED due to settlement can be solved.

The invention discloses a method for preparing nanometer magnesium aluminum spinel. The method is characterized in that firstly, nanometer size potassium sulfate particles are prepared, and the nanometer potassium sulfate particles are surface modified to make the particles uniformly dispersed in xylene; and dispersion and isolation are performed on carbonate precursor particles of the spinel by using the nanometer potassium sulfate in xylene, after centrifugation precipitation, the precipitate is dried and then is subjected to high-temperature calcination, and the nanometer magnesium aluminumspinel can be obtained after washing. According to the method, the nanometer magnesium aluminum spinel with good dispersibility and perfect crystallization can be rapidly prepared in batch.

The invention discloses an environment-friendly rubber vulcanizing activator, and a preparation method and application thereof. The vulcanizing activator comprises, by mass, 1-6 parts of C2-C6 polyalcohol, 1-5 parts of C2-C6 fatty acid polyol ester, 2-5 parts of C8-C18 fatty acids and 1-4 parts of zinc oxide. The prepared vulcanizing activator is added to rubber instead of the zinc oxide, so thatthe crosslinking density and tensile strength of the vulcanized rubber are improved, the Mooney viscosity thereof is lowered, and the processing property and wear resistance thereof are improved; meanwhile, the zinc content is reduced by 50-62% as compared with that of a zinc oxide vulcanizing system.

The invention discloses a medicine composition with skin whitening and tendering functions and a preparing method thereof. The medicine composition is mainly prepared from, by mass, 0.5-5.0 parts of rhizoma bletillae polysaccharide, 4.0-12.0 parts of sea buckthron oil, 0.2-4.0 parts of alpha-arbutin, 0.5-4.0 parts of centella asiatica total glycosides, 0.2-2.0 parts of radix angelica oil, 0.2-1.0 part of jasmine oil and 0.05-0.15 part of vitamin E. Active portions or components of natural medicine are adopted as the skin whitening and tendering medicine composition, hydrogel type emulsion is adopted as a medicine delivery carrier, and the medicine composition is externally used for treating pigmented spots, has the targeted medicine delivery function that the medicine active components reach a nidus directly and has the functions of whitening skin, fading spots, resisting wrinkle, improving elasticity, resisting ageing and preventing rhagades on skin.

The invention relates to coated glass, and a preparation method and equipment thereof. The coated glass comprises a glass substrate, and a functional membrane layer and a diamond-like membrane layer which are attached to the glass substrate sequentially and a soluble protective layer, wherein the soluble protective layer is attached to the outside of the diamond-like membrane layer. The production equipment sequentially comprises a substrate take-up device, a functional membrane layer device, a diamond-like membrane layer device and a soluble protective layer spraying device, wherein the soluble protective layer spraying device is arranged in rear of the diamond-like membrane layer device. The production method comprises the following steps of: preparing a soluble solution and spraying to form a membrane. By the coated glass, a preparation method and the equipment, the cost can be reduced, the production efficiency and the quality of products can be improved, and environmental pollution is avoided.

The invention relates to an affinity chromatography purification method of placenta sample chondroitin sulfate A or a derivative thereof, and particularly discloses a purification method of the placenta sample chondroitin sulfate A or the derivative thereof. The placenta sample chondroitin sulfate A or the derivative thereof are chromatographically purified by the affinity chromatography method, and an affinity chromatography column is a conjugate of a recombinant plasmodium infected red cell surface antigen protein and an affinity chromatography substrate. According to the chromatography purification method, crude products of the placenta sample chondroitin sulfate A or the derivative thereof are loaded onto the affinity chromatography column and washed by washing liquid until no impurities flow out, and then the crude products are eluted by eluent, and pure products of the placenta sample chondroitin sulfate A or the derivative thereof are collected. The purification method can solvethe problem of difficulty in polysaccharide purification, other polysaccharides with similar molecular sizes and structures cannot be adsorbed by rVAR2 and can be easily washed and removed to obtainhigh-purity pl-CSA, and the washing liquid pl-CSA is firmly combined by an rVAR2 ligand and easily released to obtain high recovery rate.

The present invention provides a polyolefin resin foaming sheet suitable for being used as a spacing paper of a glass substrate used for a panel display. The polyolefin resin foaming sheet contains polyolefin resin, high-polymer antistatic agent and surface active agent. The surface active agent contains negative ion surface active agent based on a Davis method, having a hydrophilic-lipophilic balance value which is more than 20. With respect to 100 parts by mass of the polyolefin resin, the content of the high-polymer antistatic agent is 3-20 parts by mass, and the content of the negative ion surface active agent is 0.1-5 parts by mass.

The invention discloses a preparation method of metal oxide nanoparticles and metal nanoparticles. The preparation method comprises the following steps: dissolving metal acetylacetonate in an organicsolvent to obtain impregnation liquid, impregnating water-soluble inorganic salt, drying, then calcining or reducing at high temperature, and washing with water to obtain the dispersed metal oxide nanoparticles or metal nanoparticles. A calcined product is secondarily calcined in a reducing atmosphere, and dispersed metal nanopowder can be obtained after water washing. By adopting the preparationmethod, the metal oxide nanoparticles or the metal nanoparticles with good dispersibility and perfect crystallization can be prepared in batches.

The invention discloses a method of utilizing caprolactam waste alkalis to prepare sodium fluoride and white carbon black. The method comprises following steps: (1) mixing waste alkalis with desalinated water, heating to dissolve waste alkalis, filtering the solution when the solution is still hot to remove insoluble impurities to obtain a filtrate (A), and cooling and re-crystallizing the filtrate (A) to obtain sodium carbonate decahydrate and a filtrate (B); (2) adding fluoro-silicic acid into the filtrate (B), after reactions, growing the grains, filtering to obtain sodium fluorosilicate crystals and a filtrate (C); (3) mixing sodium fluorosilicate obtained in the step (2) and sodium carbonate decahydrate obtained in the step (1), adding water, stirring to carry out reactions, finally adding a surfactant, and evenly mixing; and (4) settling the stock solution obtained in the step (3), removing the supernate, separating sodium fluoride and white carbon black, carrying out centrifugation, and drying to obtain sodium fluoride crystals and white carbon black. The caprolactam waste alkalis and the byproduct namely fluoro-silicic acid of the phosphate fertilizer industry are comprehensively utilized, the wastes are converted into valuable resources, and a high environment protection value and economic value are generated.

The invention provides a method for preparing yttrium aluminum garnet nanoparticles, which comprises the following steps: preparing organic sol containing aluminum and yttrium, mixing the organic solwith water-soluble salt, performing standing or centrifuging to precipitate the water-soluble salt, removing superfluous organic sol at the upper part, and keeping the temperature to convert the organic sol into gel; along with evaporation of the solvent, contracting the gel, and coating the surfaces of the water-soluble salt particles with a layer of xerogel film, and calcining a sample at a hightemperature between 600 DEG C and a salt melting point, converting a dried gel film into yttrium aluminum garnet nanoparticles, dispersing and attaching the yttrium aluminum garnet nanoparticles to the surfaces of water-soluble salt particles, cooling, and washing with water to remove the salt, thereby obtaining the yttrium aluminum garnet nanoparticles with favorable dispersity and crystallinity. According to the method, the high-dispersion and high-crystallinity yttrium aluminum garnet nanoparticles can be rapidly prepared in batches, and the method is suitable for preparing LED fluorescentpowder, YAG transparent ceramic and other materials.

The invention discloses a catalyst for the complete methanation of synthesis gas from coal and a preparation method thereof. The catalyst is prepared by using NiO as an active component, one or two of rare earth metal oxides La2O3, CeO2 and Sm2O3 as a first assistant, one of alkali oxides CaO, BaO and SrO as a second assistant, and magnesium aluminate spinel formed by mixing Al2O3 with MgO as a carrier, and the obtained catalyst contains the ingredients in percent by mass as below: 20% to 70% of NiO, 15% to 50% of Al2O3, 6% to 30% of MgO, 5% to 20% of the rare earth metal oxide-type first assistant, 1% to 8% of the alkali oxide-type second assistant and 1% to 3% of graphite; the catalyst provided by the invention has the advantages of high catalytic activity, high mechanical strength, good thermal stability, strong carbon deposition resistance, strong resistance to toxicants in feed gas, excellent low temperature activity and low cost.

This invention discloses a method for preparing wheat protein powder / calcium carbonate in-situ composite material. The wheat protein powder / calcium carbonate in-situ composite material comprises: wheat protein powder 100 parts, calcium carbonate particles 2-20 parts, and glycerin 5-43 parts. The method comprises: adding tetraethyl orthosilicate into ammonia solution of wheat protein powder, hydrolyzing to obtain calcium carbonate particles, adding glycerin plasticizer, drying, and mold-pressing to obtain wheat protein powder / calcium carbonate in-situ composite material. The wheat protein powder / calcium carbonate in-situ composite material has such advantages as wide wheat protein powder resources, simple preparation method, and no generation of toxic or harmful substances during preparation, and can be widely used in the field of degradable protein plastics and their composite materials.

The invention belongs to the field of protective coatings for glass substrates and specifically relates to glass containing a protective coating layer. The glass comprises a substrate layer, wherein the substrate layer is of the glass substrate which only comprises a glass base chip or the glass substrate formed by plating a functional film layer / layers on the glass base chip, the single functional film layer or the multiple functional film layers is / are formed on one surface or two surfaces of the glass base chip, and the glass is characterized by further comprising the protective coating layer which is formed on all or part of the region on the outer surface of the substrate layer; and the protective coating layer is a solvent dissolution type or physical stripping type coating film. According to the glass disclosed by the invention, when the protective coating layer is prepared, an alcohol cosolvent is not used as a water cosolvent and a co-carrier, the using amount of an organic solvent is reduced, and the processing treatment process after the completion of film plating on the glass is simplified; by adding a surfactant, the wettability of a coating composition when the coating composition is applied to the substrate or a functional coating film is increased, and the thickness of the protective coating layer is more uniform; and the protective coating layer has good water solubility and is easy to remove by washing with water and more thorough to remove.

The invention discloses a bottom gap welding method for an LCCC apparatus. The method comprises the following steps: 1) covering the surface of an LCCC apparatus mounting pad of a PCB board with a solid tin-lead solder layer; 2) dispensing a central position where the LCCC apparatus is mounted on the surface of the PCB board with a drop of a surface mount adhesive; 3) aligning the LCCC apparatus to the LCCC apparatus mounting position on the PCB board and pressing the LCCC apparatus till the leading-out end of a bottom surface metalized film layer of the LCCC apparatus falls onto the solid tin-lead solder layer; 4) curing the surface mount adhesive; and 5) dispensing tin-lead solder paste and then performing reflow soldering on the LCCC apparatus and the PCB board. A certain gap is reserved between the bottom surface of the LCCC apparatus and the upper surface of the PCB board, so that soldering flux residues in the tin-lead solder are easily cleaned; the tangential deformation capacity of a welding point is improved due to increase of height of a welding flux connecting point, the thermal stress influence generated by temperature variation can be effectively alleviated, the fatigue life of the welding point is prolonged and the thermal shock resistance of an LCCC packaging housing is improved, and occurrence of failures of the apparatus and assemblies is reduced.

The invention discloses an SO2 depolarization electrolytic tank and an operation method thereof, and belongs to the technical field of electrochemistry and chemical engineering. The electrolytic tank comprises one or more single cells which are arranged in sequence, a membrane electrode assembly of the electrolytic tank is composed of an anode catalyst layer and a proton selective permeable membrane, a membrane electrode is not provided with a cathode catalyst layer, and a cathode side supporting body made of materials such as graphite felt is loaded with a catalyst. According to the operation method, the cathode side is washed through an active washing or passive pressure relief method, potential elemental sulfur accumulation is reduced, and the performance of the electrolytic tank can be effectively kept. According to the invention, the damage of the membrane electrode assembly caused by the reduction reaction of SO2 across the PEM membrane in the anode region can be avoided, and the membrane electrode assembly has the advantages of long service life and strong maintainability.

The invention relates to a condensation and washing method of perfluoroethylene propylene resin. The condensation and washing method comprises the following steps: 1) adding room-temperature de-ionized water into perfluoroethylene propylene emulsion and adjusting the emulsion ratio to be 1.03 to 1.20; starting to stir and carrying out physical emulsion breaking on the emulsion for 15 to 60 min under the condition of 500 to 2000 r / min; 2) adding a condensation agent ammonium bicarbonate with the resin solid content of 1 to 5 percent into the emulsion and continually stirring until the perfluoroethylene propylene emulsion is completely broken; 3) repeatedly washing perfluoroethylene propylene, which is separated through the emulsion breaking, by utilizing the room-temperature de-ionized water until the detection is qualified. The method provided by the invention is used for carrying out the emulsion breaking and can be used for completely separating out the resin in the perfluoroethylenepropylene emulsion; compared with other methods, the subsequent dosage of washing water is not increased. The method provided by the invention is simple in steps and environmentally friendly, and industrialized large-scale production is facilitated.

The invention provides a crystallizing method of a solid antioxidant. Abundant ultrafine crystal grains crystallized in the primary crystallization process are quickly dissolved by a twice quick slight heating method, and large crystal grains are reserved to continue growth in the secondary crystallization process, so that the product crystals can grow bigger and more uniform. The anticaking capacity of the product is greatly enhanced; and meanwhile, since the crystals are more uniform and do not contain abundant fine powder, the subsequent spin-drying can be ensured, and other impurities can be washed out more easily in the washing process, thereby obtaining the product with higher purity.

The invention discloses a preparation method for carfilzomib. The method utilizes HATU as a condensing agent to perform condensation and comprises a plurality of steps. The method has the characteristics of short reaction time, simple feeding, no need for nitrogen protection, appropriate control the feeding temperature, no need for strict temperature control, and easier washing and removal of the by-product of HATU, greatly shortens the preparation time, and improves the work efficiency, thus being suitable for industrial production.

The invention provides a method for preparing nano YAG (yttrium aluminum garnet) fluorescent powder. Carbonate precursor particles of YAG are dispersed and isolated with nano potassium sulfate in xylene, after centrifugal precipitation, precipitates are dried and then calcined at the high temperature, a calcined product is secondarily calcined in the reduction atmosphere, and high-dispersity nanoYAG fluorescent powder with good light emitting performance can be obtained after water washing. By means of the method, the nano YAG fluorescent powder with good dispersity and perfect crystals can be rapidly prepared in batches. The fluorescent powder can be made into transparent fluorescent gelatin, light scattering loss is eliminated, and the problem of inconsistency of light color of a white-light LED due to settlement can be solved.

The invention provides a method for preparing porous cerium-based oxide from a water-soluble cerium precursor. To be specific, the water-soluble cerium precursor is obtained through reaction of cerium salt and concentrated sulfuric acid in absolute ethyl alcohol; porous cerium dioxide is obtained in the following way: the cerium precursor and an ethanol solution of NaOH have solid-liquid interface reaction, and then washing is carried out to remove the cerium precursor not completely reacted; the cerium-based composite oxide is obtained through reaction of porous cerium dioxide and an ethanol solution of metal salt under the heating condition. During the preparation process of the cerium precursor, the cerium precursor with different shapes can be obtained through changing the experiment parameters including concentration of sulfuric acid, reaction temperature, reaction time and the like to further adjust and control the shape of the porous cerium-based oxide. According to the invention, the method is simple and practical, the controllability is high, the pollution is small, the cost is low, and certain universality is realized. The prepared product has a mesoporous structure; the synergistic effect among all components in the composite oxide enables the components to express superior catalytic activity during CO catalytic reaction.

The invention belongs to the field of protective coatings for glass substrates and specifically relates to glass containing a protective coating layer. The glass comprises a substrate layer, wherein the substrate layer is of the glass substrate which only comprises a glass base chip or the glass substrate formed by plating a functional film layer / layers on the glass base chip, the single functional film layer or the multiple functional film layers is / are formed on one surface or two surfaces of the glass base chip, and the glass is characterized by further comprising the protective coating layer which is formed on all or part of the region on the outer surface of the substrate layer; and the protective coating layer is a solvent dissolution type or physical stripping type coating film. According to the glass disclosed by the invention, when the protective coating layer is prepared, an alcohol cosolvent is not used as a water cosolvent and a co-carrier, the using amount of an organic solvent is reduced, and the processing treatment process after the completion of film plating on the glass is simplified; by adding a surfactant, the wettability of a coating composition when the coating composition is applied to the substrate or a functional coating film is increased, and the thickness of the protective coating layer is more uniform; and the protective coating layer has good water solubility and is easy to remove by washing with water and more thorough to remove.

The invention relates to a method for preparing a sizing agent for sizing of poplin type tightly-woven fabric fiber. According to the method, polyoxyethylene, polyoxypropylene ether, polyacrylamide, di-rhamnolipid and sizing paste are added to a flask containing a stirrer, a thermometer and a reflux condensing tube, deionized water and taurine are added, temperature is increased to 85 DEG C, nitrogen is introduced for protection, stirring is conducted for 40-50 min, citric acid is slowly added for about 2 h, heat preservation is conducted for 2 h, then a PMA sizing agent, laurinol polyoxyethylene ether and ethanol are added for reaction for 9-12 h, temperature is lowered to indoor temperature, and then the sizing agent for sizing of the poplin type tightly-woven fabric is obtained. The sizing agent prepared with the method has high fiber adhesive force and high cohesive force after sizing is conducted, and fiber fuzzing can be prevented through a surface film formed on the surface of the fiber; furthermore, decoating or reduction of fiber strength caused by friction is avoided, fiber strength can be improved, and meanwhile, the elasticity, flexibility and extensibility of the fiber are maintained.