98 results about "Calcium bromide" patented technology

A packaging material used for a display device which is a desiccative-containing adhesive agent. The desiccative-containing adhesive agent is composed of a liquid-state organic material selected from a group including epoxy resin, polyurethane, bakelite, polyamide, acrylic resin and polysiloxane, and a solid-state desiccative selected from a group including alkaline metal oxide, alkaline-earth metal oxide, metallic halide, barium oxide, calcium oxide, calcium sulfate, calcium chloride, lithium chloride, calcium bromide, potassium Carbonate, aluminum oxide, magnesium oxide, copper sulfate, zinc chloride, zinc bromide, cobalt chloride, silica gel, zeolite and molecular sieve.

A self-humidifying proton exchange membrane (PEM) composition, a membrane-electrode assembly, and a fuel cell. The PEM composition comprises (a) a proton-conducting polymer; (b) a catalyst that promotes the chemical reaction between hydrogen and oxygen molecules to generate water in the membrane, and (c) a deliquescent material dispersed in this polymer. The amount of catalyst is preferably 0.01%-50% by weight on the basis of the polymer weight. The catalyst is preferably a metal catalyst selected from the group consisting of platinum, gold, palladium, rhodium, iridium, ruthenium, and mixtures and alloys thereof. Suitable deliquescent materials include, but are not limited to, calcium chloride, calcium bromide, potassium biphosphate, potassium acetate and combinations thereof. A deliquescent material absorbs and retains an essentially constant amount of moisture to keep the proton mobile in the PEM structure. The fuel cell containing such a PEM composition can be used in a higher temperature and / or lower-humidity environment.

Processes and methods exist for decreasing emissions of mercury upon combustion of fossil fuels such as coal. Halide salts can be effective when used at locations where they are thermally decomposed to form reactive halogen species, or in combination with an adsorbent material such as activated carbon. Halide salts, such as calcium bromide and sodium bromide, are not typically used at locations downstream of the economizer, where the temperature is typically below around 500° C., because these salts are non-thermolabile and do not decompose to produce reactive halogen species. However, in flue gas streams that certain flue gas constituents, such as sulfur trioxide or sulfuric acid, reactive halogen species can be produced via chemical reaction. These species react with elemental mercury through various means to form an oxidized form of mercury that is more easily captured in downstream pollution control devices such as particulate control devices or SO2 scrubbers.

Compositions, and processes utilizing such compositions, are provided for reducing mercury emissions from combustion gases. Such compositions comprise a wood- derived or coconut sheil-derived activated carbon and / or a bromide-containing in-organic salt such as an ammonium bromide or cafcium bromide salt.

The invention discloses a modified lime sulphur and an application thereof in a gold leaching technology. The modified lime sulphur comprises a stabilizer sodium-hexametaphosphate, oxidants-calcium peroxide and potassium cyanate, and additives-lead nitrate and soluble bromides (such as sodium bromide, potassium bromide, calcium bromide and the like). The modified lime sulphur is used as a gold leaching agent so as to effectively recover gold from gold-containing ores, gold concentrate powder and gold-containing wastes. The modified lime sulphur has the characteristics that the modified lime sulphur is easy to synthesize; the preparation cost is low; the preparation process is environment-friendly and toxic-free; and when the prepared modified lime sulphur is used for gold leaching, the gold leaching technology is simple, and the gold leaching velocity is high; and moreover, the modified lime sulphur is suitable for more ores than cyaniding gold leaching.

Processes and methods exist for decreasing emissions of mercury upon combustion of fossil fuels such as coal. Halide salts can be effective when used at locations where they are thermally decomposed to form reactive halogen species, or in combination with an adsorbent material such as activated carbon. Halide salts, such as calcium bromide and sodium bromide, are not typically used at locations downstream of the economizer, where the temperature is typically below around 500° C., because these salts are non-thermolabile and do not decompose to produce reactive halogen species. However, in flue gas streams that certain flue gas constituents, such as sulfur trioxide or sulfuric acid, reactive halogen species can be produced via chemical reaction. These species react with elemental mercury through various means to form an oxidized form of mercury that is more easily captured in downstream pollution control devices such as particulate control devices or SO2 scrubbers.

The invention provides a temporarily blocked high temperature kill fluid suitable for low permeability reservoir and preparation method thereof. The temporarily blocked high temperature kill fluid suitable for low permeability reservoir is composed of an inorganic salt liquid and additives, wherein the inorganic salt solution is composed of fresh water, calcium chloride and calcium bromide in mass distribution ratio of 300 to (130-252) to (0-120); the additive is composed of the raw materials in percentage by weight based on the inorganic salt liquid: 1.4-1.6% of a high temperature resistant corrosion inhibitor, 0.9-1.1% of a stabilizer, 0.1-0.15% of a surfactant, 1-1.5% of an ultra-low penetrant, 1.9-2.1% of a high temperature resistant modified starch type filtrate reducer, 3-5% of a temporary blocking material, 0.1-0.3% of a temperature resistant tackifier and shear strength improving agent or 3-6% of an oligomerization type thickener, 1-1.5% of a liquid-state oil-soluble liquid temporarily blocking agent or 1-2% of low fluorescent sulfonated pitch.

Compositions, and processes utilizing such compositions, are provided for reducing mercury emissions from combustion gases. Such compositions comprise a wood-derived or coconut shell-derived activated carbon and / or a bromide-containing inorganic salt such as an ammonium bromide or calcium bromide salt.

The invention provides an efficient light-emitting CsPbCl3-xBrx nanocrystal preparation method which comprises the following steps of: A) mixing CsPbCl3 nanocrystals with a tributylphosphine oxide-calcium chloride solution, and adding a settling agent to obtain a settling product; and B) adding a settling agent into the settling product and a tributylphosphine oxide-calcium bromide solution to obtain the treated high-efficiency light-emitting CsPbCl3-xBrx nanocrystal (wherein x is equal to 0.2 to 2.8). The inorganic perovskite nanocrystal with high luminous efficiency is prepared through aftertreatment of the tributylphosphine oxide-calcium short-chain composite ligand, the performance of a pure blue light LED device can be remarkably improved through the nanocrystal, and the method has the advantages of simple preparation process, high efficiency, low cost and the like.

In an embodiment of the present disclosure, a method for fabricating a sugar product is provided. The method includes mixing formic acid and lithium chloride, magnesium chloride, calcium chloride, zinc chloride or iron chloride or lithium bromide, magnesium bromide, calcium bromide, zinc bromide or iron bromide or heteropoly acid to form a mixing solution, adding a cellulosic biomass to the mixing solution for a dissolution reaction, and adding water to the mixing solution for a hydrolysis reaction to obtain a sugar product. The present disclosure also provides a sugar product fabricated from the method.

A process for the preparation of Solid Calcium Bromide Hydrates comprises preparing a highly concentrated Calcium Bromide solution from an initial solution having a lower concentration, bringing it into contact with a cold surface, whereby solid Calcium Bromide hydrates form on said surface, and detaching said solid hydrates from said surface. The concentration of the initial solution is not higher than 60 wt %, typically 52 wt %, and is brought to from 65 to 78 wt %. The said Calcium Hydrates are mainly tetrahydrate Calcium Bromide. The Solid Calcium Hydrates have many uses in the processing of oil wells, for instance preparation of completion fluids, work-over fluids or drill-in fluids in the processing of wells, restoring already used and / or depleted such fluids to the desired, original density. They also have other uses, particularly for soil remediation.

This invention provides zinc-free aqueous brine compositions. These zinc-free aqueous brine compositions have a density of about 14.3 pounds per gallon or more, and a true crystallization temperature of about 20° F. or less, and comprise water and one or more inorganic bromide salts, with the provisos that when calcium bromide is present, one or more other water-soluble inorganic salts are also present, when lithium bromide is present, calcium bromide is absent, when bismuth(III) bromide is present, one or more other water-soluble inorganic salts are also present, and for a true crystallization temperature of about 10° F. or less, when manganese(II) bromide is present, one or more other water-soluble inorganic salts are also present. Processes for forming these zinc-free aqueous brine compositions are also provided.

A self-humidifying proton exchange membrane (PEM) composition, a membrane-electrode assembly, and a fuel cell. The PEM composition comprises (a) a proton-conducting polymer; (b) a catalyst that promotes the chemical reaction between hydrogen and oxygen molecules to generate water in the membrane, and (c) a deliquescent material dispersed in this polymer. The amount of catalyst is preferably 0.01%-50% by weight on the basis of the polymer weight. The catalyst is preferably a metal catalyst selected from the group consisting of platinum, gold, palladium, rhodium, iridium, ruthenium, and mixtures and alloys thereof. Suitable deliquescent materials include, but are not limited to, calcium chloride, calcium bromide, potassium biphosphate, potassium acetate and combinations thereof. A deliquescent material absorbs and retains an essentially constant amount of moisture to keep the proton mobile in the PEM structure. The fuel cell containing such a PEM composition can be used in a higher temperature and / or lower-humidity environment.

The invention discloses a chlorine dioxide disinfectant special for livestock and poultry, which belongs to the technical field of disinfection. The product is prepared from the following raw materials in parts by weight: chlorite, monopersulfate, an acidifying agent, bromide salt, a stable forming agent and a drying agent. The chlorite is at least one of alkali metal salt of chlorite and alkalineearth metal salt of chlorite; the acidifying agent is at least one of sodium hydrogen sulfate, sodium bicarbonate, potassium bicarbonate and boric acid; wherein the bromide salt is selected from at least one of sodium bromide, lithium bromide, potassium bromide, calcium bromide, magnesium bromide, ammonium bromide and aluminum bromide; wherein the stable forming agent comprises at least one of sodium sulfate, magnesium sulfate, magnesium hydroxide, sodium chloride and magnesium chloride; and the drying agent is at least one of calcium chloride, calcium sulfate and calcium stearate. The invention also provides a preparation method of the disinfectant. The disinfectant does not generate substances such as chloroform and cyanuric acid in the activation process, so that the disinfectant is suitable for occasions such as livestock and poultry breeding.

The invention discloses a collaborative oxidation demercuration device and demercuration method for coal-fired flue gas. The device comprises a solution-preparing tank. An inlet of the solution-preparing tank is connected to a pure water adding device and a calcium bromide solid powder feeding device; an output pipe of the solution-preparing tank is provided with a high voltage variable frequency metering pump; and a tail end of the output pipe is provided with a solution spraying gun The method comprises the steps of 1) adding pure water and calcium bromide solid powder in the solution-preparing tank and preparing a calcium bromide solution with a mass percentage of 10-30%; 2) pumping the calcium bromide solution into the solution spraying gun through the high voltage variable frequency metering pump; and 3) spraying the calcium bromide solution to coal powder through the solution spraying gun, so as to carry out collaborative oxidation demercuration. The collaborative oxidation-demercuration device and demercuration method can effectively control the concentration of zero-valence mercury in the coal-fired flue gas. The demercuration device has the characteristics of simple system, convenience, low operation cost, easy maintenance and management, easy popularization and application. The demercuration device and demercuration method have very high popularization and application values.

The invention relates to an iron bromide mercury removal compound liquid and a method for removing mercury of flue gas by use of the same. The compound liquid is an iron bromide mercury removal compound liquid which is prepared by taking iron chloride and calcium bromide as main active raw material components and adding hydrogen peroxide with certain concentration, wherein the molar ratio of iron chloride to calcium bromide is 2:3, the mass concentration of iron chloride is 1-10%, and the mass concentration of hydrogen peroxide is 0.1-2.0%. The method for removing mercury of flue gas by use of the iron bromide mercury removal compound liquid comprises the following steps of: uniformly spraying the iron bromide mercury removal compound liquid into the coal-fired flue gas according to certain proportion; generating active bromine atoms or molecules through the oxidation effect of iron ions and hydrogen peroxide on the bromine ions, and converting zero-valence mercury in the flue gas into bivalence mercury by use of the active bromine atoms or molecules; and finally, synchronously absorbing and removing the bivalence mercury and residual iron bromide compound liquid in the flue gas by a wet desulfurization device to achieve an aim of removing mercury in the flue gas. Compared with the prior art, the method provided by the invention can improve the oxidation efficiency of zero-valance mercury in the coal-fired flue gas, avoid secondary pollution and save cost.

Disclosed are: a Pd / Sn colloid catalyst adsorption enhancer which can be used for the formation of a metal coating film on the surface of a non-conductive material (e.g., plastic) by plating with good efficiency; a catalyst-addition solution comprising the adsorption enhancer; and a method for plating a non-conductive material. The adsorption enhancer can be used for the plating onto a non-conductive material and comprises a bromine compound of any one selected from a typical metal element, a typical non-metal element and a transition metal element with bromine. The bromine compound may be lithium bromide, sodium bromide, aluminum bromide, potassium bromide, calcium bromide, strontium bromide, tin (II) bromide, cesium bromide, barium bromide, hydrobromic acid, silicon (IV) bromide, vanadium (III) bromide, manganese (II) bromide, iron (II) bromide, cobalt (II) bromide, nickel (II) bromide, palladium (II) bromide, gold (III) bromide, or the like. The non-conductive material may be an ABS resin, a PC resin-blended ABS resin, or the like.

The invention discloses a method for preparing calcium bromide solution used for oil drilling, comprising the following steps: (1) adding calcium bromide solution into a kettle to be used as a reaction carrier, and then throwing calcium oxide, dripping hydrobromic acid, obtaining reaction liquid material A after reaction; (2) throwing calcium hydroxide into the reaction liquid material A obtained in step (1); dripping hydrobromic acid to carry out reaction until the reaction is completed; after the completeness of the reaction, then carrying out bleaching, sedimentation, filter pressing, fine filter on reaction completed liquid to obtain the calcium bromide solution used for oil drilling, wherein, the yield rate is more than 97%. The process eliminates the processes of evaporation and cooling, thereby increasing the yield rate and lowering the production costs, in addition, no organic impurities are precipitated in the process of long time placement of the prepared calcium bromide product, thereby having stable product quality and significant economic benefits.

Bromine containing compounds, such as calcium bromide, sodium bromide and the like, are prepared in high purity and more quickly with less waste by using a process with two bromination stages and often a third step wherein the crude product mixture can be adjusted to meet specific product requirements. In the first bromination stage, the majority, but not all, of a substrate is brominated usiung a reductive bromination reaction, the remaining unreacted substrate is converted to product in the second stage through another a reductive bromination reaction, although the specific reagents may be different, wherein the addition of bromine and a reducing agent are carefully monitored.

The invention discloses a solid phase-free high-density completion fluid which comprises water, calcium bromide, zinc chloride and an imidazoline additive, wherein the mass ratio of the water to the calcium bromide to the zinc chloride to the imidazoline additive is 10 to (22 to 24) to (21 to 22) to (0.1325 to 0.14). Calcium bromide and zinc chloride are compounded, and an imidazoline additive isadded, so that the high-temperature-resistant high-density solid-phase-free completion fluid of which density is greater than the density of calcium bromide and zinc chloride which are respectively and independently dissolved in water to reach saturation is prepared, the density of the completion fluid is (2.002-2.037) g / cm<3>, solution fluidity is good, apparent viscosity is less than or equal to19.50 mPa.s, the corrosion rate of 13Cr steel coupon at 200 DEG C under normal pressure is less than or equal to 0.0333 mm / a, the clay anti-swelling rate is more than or equal to 87.0%, the solutionis transparent and colorless, the turbidity is less than or equal to 28.5 NTU, and a powerful scientific and technological support is provided for well completion and well repair of an ultra-deep high-temperature oil-gas well.

Heavy fluids are made from calcium bromide and at least one hydrogen bond donor such as a low molecular weight polyol or an organic acid. The combination of a hydrogen bond donor and calcium bromide as a hydrogen bond acceptor in an appropriate molar ratio forms a higher density clear completion fluid at a low temperature not otherwise obtainable with heavy aqueous solutions of calcium bromide such as are used in oilfield wells. A method of making the fluid comprises mixing calcium bromide with the polyol(s) in the presence of water and then reducing the water content, thus forming a heavy fluid. A crystallization inhibitor such as nitrilitriacetamide or a particulate silicate is included in the formulation. When the heavy fluid “freezes,” its physical form is somewhat amorphous and pumpable rather than crystalline. The heavy fluid is useful as a drilling fluid as well as a completion fluid and for other purposes in oil recovery processes where extreme density is beneficial.

A granulated calcium bromide product is provided, and a method for its manufacture. The product, obtained by wet granulation or by dry granulation, contains at least 80 wt. % calcium bromide, and it is particularly suitable for preparing dense calcium bromide brines used as a drilling fluid.

The invention belongs to the technical field of concrete admixtures, and relates to graphene modified concrete retarder and a preparation method thereof. The retarder disclosed by the invention is prepared from the following components in parts by weight: 10 to 40 parts of graphene, 5 to 35 parts of ethylenediamine tetraacetic acid salt, 10 to 30 parts of formate, 10 to 35 parts of calcium bromideand 10 to 20 parts of urea. The retarder has the characteristics that the concrete setting time is delayed, the concrete strength increasing speed is increased, and the strength of concrete at all ages is improved.

A process for the production of calcium bromide from feed brines, particularly from Dead Sea End Brine (EB), is described. The process comprises extracting the feed brine in countercurrent with a composite organic solvent; optionally, purifying the extract to increase the ratio Br:Cl by contacting it with a part of the product; and washing the purified extract with water to yield the product, that is an aqueous solution of CaBr2. The composite solvent comprises an anionic extractant, such as an amine or a mixture of amines; a cationic extractant, such as a carboxylic phosphoric or sulphonic acid or a mixtures of said acids; and diluent / modifier, which is an organic solvent. An apparatus for the production of calcium bromide is also described, which comprises: an extraction battery; optionally, a purification battery; and a washing battery, wherein at least one of the batteries comprises a plurality of stages.

The invention discloses a spraying quick-setting rubber asphalt waterproof coating and a preparation method thereof. The coating comprises a component A and a component B. The component A comprises unvulcanized rubber latex, anionic emulsified asphalt, stearate, colloidal sulfur, a first stabilizer and a pH regulator; and the component B comprises nano zinc oxide, dithiocarbamate, a second stabilizer, quaternary ammonium salt, calcium bromide and water. After the spraying quick-setting rubber asphalt waterproof coating is sprayed, vulcanization crosslinking among rubber particles can be realized, the acting force among the rubber particles in a coating is improved, and the problem of poor use performance caused by no crosslinking among the rubber particles after traditional rubber modified asphalt is sprayed is solved.

Recovering bromine from solid waste containing bromine compounds, and applications thereof, such as for recovering bromine in a form suitable for reuse, or for manufacturing bromine salt (for example, calcium bromide). Bromine recovery method and system include: providing and mixing (i) solid waste containing bromine compounds and (ii) solid calcium hydroxide; heating the mixture in a chemical reducing (non-oxidizing) environment, thereby forming heated product consisting essentially of only solid calcium bromide (salt); and processing the heated product, to form bromine. Calcium bromide manufacturing method and system include: providing and mixing (i) solid waste containing bromine compounds and (ii) solid calcium hydroxide; heating the mixture in a chemical reducing (non-oxidizing) environment, thereby forming solid calcium bromide (salt). Applicable to processes of, or involving, manufacturing bromine-based flame (fire) retardant materials.

The invention discloses a resource recovery processing method of a waste circuit board. The resource recovery processing method comprises the following steps of crushing the waste circuit board into particles, mixing the particles with an additive, and carrying out anaerobic pyrolysis treatment to obtain pyrolysis gas and a pyrolysis solid product; screening the pyrolysis solid product to obtain calcium bromide, calcium carbonate, calcium oxide, carbon powder, glass cloth, copper foil and the like; adding water into the calcium bromide, the calcium carbonate, the calcium oxide and the carbon powder, dissolving and filtering the mixture to obtain a calcium bromide aqueous solution and calcium carbonate-calcium hydroxide-carbon powder; evaporating the calcium bromide aqueous solution to obtain a calcium bromide product; drying and screening the calcium carbonate-calcium hydroxide-carbon powder to obtain a carbon powder product and the calcium carbonate and the calcium hydroxide; inorganic bromine in pyrolysis gas generated by catalytic cracking of the thermal gas is absorbed by calcium oxide, then dissolved, filtered, evaporated and concentrated, bromine in the pyrolysis gas is recycled, the pyrolysis gas is combusted after absorption by calcium oxide, and smoke generated by combustion and fusion casting is treated to reach the standard and then discharged. According to the method, the waste circuit board can be recycled, dioxin is prevented from being generated, the recovery rate is high, and industrial application is facilitated.

The invention relates to an ortho-position dihalogen substitution compound of aryl pyrimidine and a preparing method thereof. The compound has the following structural formula I: R1=H, p-Me, p-Cl, p-COOEt, p-CF3, m-Me, m-OMe, R2=H, 4-Ph, 5-Ph, X=Cl, Br. The invention comprises the following steps: dissolving aryl pyrimidine, palladium acetate, additive and halogenation calcium into acetic acid, stirring, and reacting until reaction raw material disappears; removing solvent, adding saturation sodium bicarbonate solution into a system, and extracting a product with ethyl acetate; obtaining a crude product by drying the organic phase and removing the solvent; purifying the product to obtain the corresponding ortho-position dihalogen substitution compound of aryl pyrimidine. The compound of the invention is a kind of important organic synthesis intermediate. The invention has easily obtained raw material, high reaction selectivity, and adopts calcium chloride and calcium bromide with low price as a halogen source, uses common solvent in reaction, and has simple operation, moderate reaction condition and environmentally friendly reaction, maximum reaction yield can reach 95%, so that the invention is very suitable for industrial production.

The invention discloses a modified carbon-based adsorbent as well as a preparation method and application thereof. According to the method, activated carbon is used as a carrier, cuprous chloride, copper chloride, ferric chloride, calcium chloride, copper bromide, ferrous bromide, calcium bromide, cuprous iodide, ferrous iodide, calcium iodide and the like are loaded as activators, and a modified carbon-based material is successfully prepared through normal-temperature mechanical ball milling activation and used as an adsorbent for fixed removal of mercury in flue gas. The method is simple in process, easy to operate and short in consumed time; operation can be carried out at normal temperature without high-temperature roasting, and energy consumption is low; no wastewater or waste residue is generated in a modification process, the consumption of water and raw materials is small, and cost is remarkably reduced; and the modified carbon-based adsorbent is large in mercury adsorption capacity and high in adsorption rate, and a product obtained after mercury removal is environmentally friendly and free of secondary pollution.

The invention relates to an aryl pyrimidine ortho-single halogen substituted compound and a synthetic method thereof. The structural formula of the compound is R1=o-Me, m-Me, m-OMe, p-Me, p-Cl, p-COOEt, p-CF3R2=H, 4-Ph, 5-PhX=Cl, Br. The method has specific steps of dissolving aryl pyrimidine, palladium acetate, additive and calcium halide in acetic acid or mixture of acetic acid and acetic anhydride, stirring to react until the raw materials disappear; removing the solvent, adding in saturated sodium bicarbonate solution, extracting the product with ethyl acetate, drying organic phase, obtaining crude product after removing the solvent; and passivating the crude product, thus obtaining the corresponding aryl pyrimidine ortho-single halogen substituted compound. The aryl pyrimidine ortho-single halogen substituted compound is an important organically synthesized intermediate. The invention has easily obtained raw materials, high reaction selectivity, and cheap calcium chloride and calcium bromide as halogen sources. During reaction, the invention uses routine solvent, has simple operation, mild condition, environment-friendly reaction, and reaction yield up to 95%, and is very suitable for industrial production.