40 results about "DBNPA" patented technology

Novel formulations containing a non-oxidative biocide, such as DBNPA, and a source of an in situ produced active biocide, such as a concentrated aqueous solution of an inorganic halide salt, are disclosed. These novel formulations are particularly effective in the treatment of water, and are characterized by high stability, desirable rheological properties and an excellent biocidal activity.

The present invention is directed to a composition for treating recirculating water systems, comprising: (1) a biocidal effective amount of a first nonoxidizing biocide comprising biguanide; and (2) a biocidal effective amount of a second nonoxidizing biocide comprising dibromonitrilopropionamide (DBNPA); wherein the composition is substantially free from oxidants. The present invention is also directed to a method of controlling the growth of microorganisms in recirculating water systems, comprising the step of treating the recirculating water systems with the above composition.

The present invention is directed to a kit and method for preventing a body of water from clouding, comprising: (a) a first container containing a first water treatment composition, the first water treatment composition comprising 2,2-dibromo-3-nitrilopropionamide (DBNPA); and (b) a second container containing a second water treatment composition, the second water treatment composition comprising an oxidizer; wherein the body of water contains polyhexamethylene biguanide (PHMB). The present invention is also directed to a kit and method for remediating a cloudy body of water, comprising: (a) a first container containing a first water treatment composition, the first water treatment composition comprising 2,2-dibromo-3-nitrilopropionamide (DBNPA); (b) a second container containing a second water treatment composition, the second water treatment composition comprising an oxidizer; and (c) a third container containing a third water treatment composition, the third water treatment composition comprising a flocculant; wherein the body of water contains polyhexamethylene biguanide (PHMB).

The invention relates to a sterilization method capable of preventing a reverse osmosis membrane from being polluted and plugged by microbe. The sterilization method mainly comprises the steps of adding an oxidizing sterilizing agent NaClO (5%) solution to a raw water tank continuously; adding a reducing agent NaHSO3 (35% W / V) solution continuously after ultra-filtration; removing residual chlorine thoroughly; controlling a pH value of inlet water at a reverse osmosis inlet between 7.1 and 7.4; monitoring and controlling ORP before a security filter between 200 mv and 300 mv; and sterilizing by carrying out preventative addition of a non-oxidizing sterilizing agent DBNPA solution with a concentration of 50 ppm continuously for one hour once every week in the above flow according to the quick killing characteristic of the non-oxidizing sterilizing agent DBNPA. Meanwhile, NaClO addition to the raw water tank is stopped. The sterilization method mainly takes use of the oxidizing sterilizing agent accompanied by two non-oxidizing sterilizing agents to carry out preventative sterilization alternatively, controls drug tolerance and resistance of the microbe, can effectively prevent and control propagation and excessive multiplication of the microbe on the surface of the reverse osmosis membrane, thereby preventing the reverse osmosis membrane from being polluted and plugged by the microbe.

The invention provides a composite antisludging agent of a reverse osmosis / nanofiltration system. The composite antisludging agent comprises the following components in percentage by weight: 2%-10% of cyclodextrin solution, namely a component I, 80%-90% of at least one or a mixture of amino trimethylene phosphonic acid (ATMP), a copolymer of maleic anhydride-acrylic acid (MA-AA), 2-phosphonic acid butane-1, 2,4-tricarboxylic acid (PBTCA), and hydroxyl ethylidene diphosphonic acid (HEDP), namely a component II, and 1%-10% of 2,2-dibromo-2-cyano-acetamid (DBNPA), namely a component III. The composite antisludging agent is prepared by mixing the component II and the component III, and then fusing the obtained mixture with the component I. When being applied to the reverse osmosis / nanofiltration / ultrafiltration system, the composite antisludging agent can be used for effectively relieving the pollution to the reverse osmosis / nanofiltration / ultrafiltration system caused by polcard, calcium sulphate salt, barium sulfate, strontium sulfate, calcium fluoride, colloidal iron and colloidal silica, relieving biological contamination simultaneously, improving the working efficiency of the system, prolonging the cleaning period and the service life of the reverse osmosis / nanofiltration / ultrafiltration system, and reducing the cost of reverse osmosis.

The present invention is directed to a composition for reducing the levels of microorganisms in recreational water systems, comprising: (1) a biocidal effective amount of dibromonitrilopropionamide (DBNPA); (2) optionally, a biocidal effective amount of an algaecide selected from the group consisting of didecyldimethylammonium chloride (DDAC), zinc, and copper; and (3) optionally, a compound capable of in situ activation to form an oxidizing agent; wherein the composition is effective for reducing the levels of microorganisms in recreational water systems. The present invention is also directed to a method of controlling the growth of microorganisms in recreational water systems, comprising the step of providing the above composition; and adding the composition to a recreational water system.

The invention relates to a bactericidal and preservative agent combination for the repair-regeneration of microbial pollution products, which comprises the following active ingredients: a preservative agent A, a preservative agent B, a bactericide, solvents, additives and water, wherein the preservative agent A is formed by bronopol, the preservative agent B is formed by parachlorometaxylenol PCMX and a phenoxyethanol mixture, and the bactericide is formed by 2,2-dibromo-3-nitrilo-propionamide DBNPA or polyhexamethylene biguanidine hydrochloride PHMB. Through one-time addition, the bactericidal and preservative agent combination disclosed by the invention has strong synergistic, preservative and bactericidal effects, and can concurrently have the functions of bactericidal repair and corrosion and mildew prevention in the period of re-storage, thus most of industrial water-based products metamorphosed by microbial pollution are reused. The bactericidal and preservative agent combination disclosed by the invention has the advantages of reasonable formula, advanced process, high cost performance, low toxicity, good operational feasibility, bactericidal and preservative effect, and the like, and is verified through a lot of industrial practices.

The invention relates to a dirt cleaning agent for a reverse osmosis membrane. The dirt cleaning agent for the reverse osmosis membrane comprises the following components in percentage by weight: 43 to 50 percent of an anionic surfactant, 0.8 to 1 percent of a metal complexing agent, 3.8 to 4.5 percent of an anti-deposition agent, 17.6 to 20.2 percent of lauryl diethanolamine, 8 to 8.5 percent ofsodium xylene sulfonate, 3.5 to 4.0 percent of sodium chloride, 0.4 to 0.6 percent of sodium sulfate, 0.8 to 1.0 percent of a sterilizing agent and the balance of deionized water. According to the dirt cleaning agent for the reverse osmosis membrane, which is provided by the invention, the anionic and nonionic surfactant is added in the cleaning agent, so the cleaning efficiency of the cleaning agent is greatly improved; the membrane flux can be maintained and the life of the membrane can be prolonged; the surfactant which the cleaning agent contains can permeate rapidly, so dirt can be removed effectively; the sterilizing agent DBNPA is added, so that microorganisms are killed and cleaning is realized; and due to the excellent bacteriostatic function of the sterilizing agent, the microorganisms are not liable to grow continuously and damage to the membrane caused by multi-time cleaning is avoided.

The present invention is directed to a composition for treating recirculating water systems, comprising: (1) a biocidal effective amount of a first nonoxidizing biocide comprising biguanide; and (2) a biocidal effective amount of a second nonoxidizing biocide comprising dibromonitrilopropionamide (DBNPA); wherein the composition is substantially free from oxidants. The present invention is also directed to a method of controlling the growth of microorganisms in recirculating water systems, comprising the step of treating the recirculating water systems with the above composition.

The invention discloses 20% DBNPA (2,2-dibromo-3-nitrilopropionamide) water-soluble liquor and a preparation method thereof. According to the method, PEG (polyethylene glycol) with different molecular weights and different proportions and additive cosolvent are selected as main composition parts, and a proportion meeting the preparation requirement is selected by comparing dissolving conditions of quantitative DBNPA under different formulae; comparison results indicate that an optimal formula of the 20% DBNPA water-soluble liquor capable of meeting the performance requirement of the water-soluble liquor can be obtained by selecting the proportion of 40 percent by mass of PEG 400, 10 percent by mass of glycerinum, 20 percent by mass of DBNPA and 30 percent by mass of water. The 20% DBNPA water-soluble liquor is good in stability and low in cost, even solid or precipitate cannot be separated when storage and transportation are performed in an environment of minus 20 DEG C, and the performance of the liquor is remained even if the liquor is restored to the original state after being frozen and cured.

The present invention provides an essentially pure compacted 2,2-Dibromo-3-nitrilopropionamide (DBNPA) in a granular and / or tablet and / or briquette and / or pellet form. The present invention further provides a process for preparing the same essentially pure compacted DBNPA.

A dispersion of 2,2-dibromo-3-nitrilopropionamide (“DBNPA”) particles in a restrictedly viscosified concentrated brine solution effectively negates gelling of the brine solution because the naturally occurring gum used does not exhibits Ellis-Plastic behavior in the concentrated brine at a pH of from about 1 to 4. Because the DBNPA particles are much less soluble in the brine than in water, the particles are held in the stable dispersion. Moreover, a dispersion of DBNPA particles in viscosified brine provides at least the same biocidal effect as a solution of DBNPA, relative to the same concentration of DBNPA in solution in glycol, but also concurrently nullifies the degradation of the DBNPA during storage so that the loss due to hydrolysis of the DBNPA is less than 3% over a period of three months at a temperature in the range from −5° C. to 25° C. A process is disclosed for making the dispersion which can be stored at a temperature in the range from about −5° C. to 25° C. for up to three months with less than 3% by weight of the DBNPA particles settling out, and with less than 3% degradation of the DBNPA, provided the desired salt solution is made first and the remaining ingredients added thereafter.

The invention discloses a lithium-based anti-bacteria metal surface treatment agent which comprises the following components in parts by weight: 15-20 parts of polyvinyl alcohol, 0.4-0.5 part of tea saponin, 3-4 parts of lithium lubricating grease, 0.4-1 part of ferrocenecarboxylic acid, 0.1-0.2 part of hexahydrophthalic anhydride, 0.1-0.12 part of DBNPA, 0.5-1 part of potassium sorbate, 0.1-0.2 part of hexamethyl phosphoramide, 1-2 parts of sodium bisulfite, 6-8 parts of sericin, 0.08-0.1 part of boric acid, 10-20 parts of methylbenzotriazole and 180-200 parts of deionized water. According to the invention, water-soluble polymer polyvinyl alcohol and sericin are mixed, and through modification of boric acid, tensile strength and heat stability of a blended membrane are improved, the membrane adsorbed on the surface of the metal is more uniform and stable since corrosion inhibition alkali liquor using methylbenzotriazole as a main material is added, the metal material is protected from being corroded by harmful media in atmosphere and water, a better corrosion inhibition effect is achieved, and bacterial and fungal contamination can be effectively resisted sine the added DBNPA, potassium sorbate and other various metal surface treatment agent additives are compatible.

The invention discloses a bromine-type sterilizing agent being composed of 2,2-dibromo-3-nitrile propylamine (DBNPA), and an acid or an alkali. The bromine-type sterilizing agent is prepared through following steps: at room temperature, regulating the pH value of waste water with the acid or the alkali to 6-9, adding the DBNPA according to a formula, and treating the waste water for 5-48 h. The bromine-type sterilizing agent is excellent in economic benefit and environmental protective benefit. An addition amount of the DBNPA per time is only 10 mg / L, which is reduced in cost by 80% when compared with other sterilizing agents. The 2,2-dibromo-3-nitrile propylamine (DBNPA) is an environmental-friendly sterilizing agent which can kill bacteria, alga and fungus. The DBNPA can be quickly decomposed into carbon dioxide, ammonia gas and bromide ion which are toxic-free in environment.

The present invention discloses novel biocide composition comprising 2,2-dibromo-3-nitrilopropionamide (DBNPA) being in the form of a stable aqueous suspension. Further are disclosed the preparation of these compositions and their biocidal uses.

The invention discloses a bactericide for controlling red spots of wet blue leather. The bactericide is characterized by comprising, by weight, 15-50% of bactericide CIT / MIT, 1-8% of bactericide DBNPA, 1-20% of stabilizers Mg(NO<3>)<2>, 5-15% of solvents polyethylene glycol 400 and 10-80% of water. The bactericide has the advantages that the bactericide is environmentally friendly, is high in efficiency and can be added into raw materials fur when the raw materials fur are soaked in water, and accordingly breeding of the red spots of the wet blue leather can be effectively controlled when the wet blue leather is obtained.

A method for reducing antimicrobial compound levels in a liquid composition containing at least one antimicrobial compound. The method comprises contacting said liquid composition with a functionalized resin. Antimicrobial compounds that may be removed by this method include isothiazolin-3-ones, e.g., 2-methyl-4-isothiazolin-3-one; 5-chloro-2-methyl-4-isothiazolin-3-one; 2-n-octyl-4-isothiazolin-3-one; 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one; 1,2-benzisothiazolin-3-one and N-alkyl derivatives thereof, especially N-methyl and N-n-butyl; 2,2-dibromo-3-nitrilopropionamide (DBNPA); 2-bromo-2-nitropropanediol (BNPD); dithio-2,2′-bis(benzmethylamide) (DTBMA); hexetidine; chlorphenesin, C1-C4 alkyl-4-hydroxybenzoates (alkyl parabens); 3-iodopropynylbutylcarbamate (IPBC); formaldehyde releasers and mixtures thereof.

The invention relates to an induction system for preparing especially large molecule amphoteric water treatment absorbent, belonging to the technical field of chemical synthesis process, in particular to the technology for preparing especially large molecule amphoteric water treatment absorbent. The especially large molecule amphoteric water treatment absorbent comprises disodium ethylene diamine tetraacetate, sodium formate, DBNPA, beta- dimethylamino propionitrile, ethylenediamine, persulphate, sulphite and water soluble organic diazonium salt. The induction system reduces induction polymerization temperature, prevents interlinkage of polymer during polymerization and drying, and can obtain especially large molecule amphoteric water treatment absorbent with fast dissolution speed. Molecular weight degradation is small and the product solubility is good in pelleting and drying process.

Provided is a method for suppressing slime in a reverse osmosis membrane apparatus, the method achieving the advantageous effect of suppressing generation of slime (a biofilm) and by which the advantageous effect of removing slime (a biofilm) can be achieved in a short time even if slime (a biofilm) is generated and adheres to a surface of a reverse osmosis membrane. This method for suppressing slime is used in a reverse osmosis membrane apparatus and has a water-passing step for passing water to be treated through the reverse osmosis membrane. The water-passing step includes a first water-passing step in which a slime suppressing agent X which contains 2,2-dibromo-3-nitrilopropionamide (DBNPA) and a slime suppressing agent Y which contains at least one type selected from the group consisting of components (A) to (D) (which are as described in the description) are added to the water to be treated which has a pH of 10 or less, and the water to be treated, which contains the slime suppressing agent X and the slime suppressing agent Y, is passed through the reverse osmosis membrane.

A method for reducing antimicrobial compound levels in a liquid composition containing at least one antimicrobial compound. The method comprises contacting said liquid composition with a functionalized resin. Antimicrobial compounds that may be removed by this method include isothiazolin-3-ones, e.g., 2-methyl-4-isothiazolin-3-one; 5-chloro-2-methyl-4-isothiazolin-3-one; 2-n-octyl-4-isothiazolin-3-one; 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one; 1,2-benzisothiazolin-3-one and N-alkyl derivatives thereof, especially N-methyl and N-n-butyl; 2,2-dibromo-3-nitrilopropionamide (DBNPA); 2-bromo-2-nitropropanediol (BNPD); dithio-2,2′-bis(benzmethylamide) (DTBMA); hexetidine; chlorphenesin, C1-C4 alkyl-4-hydroxybenzoates (alkyl parabens); 3-iodopropynylbutylcarbamate (IPBC); formaldehyde releasers and mixtures thereof.

The present invention provides biocide compositions, containing DBNPA encapsulated or absorbed in ceramic powders or xerogels, for preventing the formation of biofilms and for incorporating into paints, coatings, plasters, and plastics.

The invention relates to a novel latex paint green anti-corrosion system and application of the novel latex paint green anti-corrosion system in interior wall latex paint. The latex paint green anti-corrosion system is prepared from a quick bactericide (DBNPA type& CMIT type), a long-acting long-lasting bactericide (MIT type & BIT type), and a dry film mildewproof agent (IPBC type & OTI& ZPT type). No reaction occurs among the preservatives, so that the phenomenon that the antiseptic and mildew-proof effects are reduced due to the reaction among different preservatives is avoided; and by adjusting the dosage of each preservative in the preservative combination, a new preservative combination which not only meets the standard GB / T 35602-2017 but also has no adverse effect on the original performance of the product is obtained. The latex paint green anti-corrosion system combination has the advantages of being green and environmentally friendly to human bodies and the environment and the like while having excellent in-tank antibacterial and dry film mildew-proof performance.

The invention relates to a sterilization method capable of preventing a reverse osmosis membrane from being polluted and plugged by microbe. The sterilization method mainly comprises the steps of adding an oxidizing sterilizing agent NaClO (5%) solution to a raw water tank continuously; adding a reducing agent NaHSO3 (35% W / V) solution continuously after ultra-filtration; removing residual chlorine thoroughly; controlling a pH value of inlet water at a reverse osmosis inlet between 7.1 and 7.4; monitoring and controlling ORP before a security filter between 200 mv and 300 mv; and sterilizing by carrying out preventative addition of a non-oxidizing sterilizing agent DBNPA solution with a concentration of 50 ppm continuously for one hour once every week in the above flow according to the quick killing characteristic of the non-oxidizing sterilizing agent DBNPA. Meanwhile, NaClO addition to the raw water tank is stopped. The sterilization method mainly takes use of the oxidizing sterilizing agent accompanied by two non-oxidizing sterilizing agents to carry out preventative sterilization alternatively, controls drug tolerance and resistance of the microbe, can effectively prevent and control propagation and excessive multiplication of the microbe on the surface of the reverse osmosis membrane, thereby preventing the reverse osmosis membrane from being polluted and plugged by the microbe.

The invention discloses a recycling method of DBNPA production wastewater. The DBNPA production wastewater is mixed with raw material CAA, wherein, the weight ratio of the production wastewater to CAA is 150 to 1; the mixture is heated and dissolved, and the dissolving temperature is 90 DEG C to the room temperature; the solution is filtered to remove foreign bodies and is combined with the production wastewater. Bromine is dripped for the reaction to obtain the DBNPA product. The yield of the product is 94 percent and the product is qualified. Simultaneously, the wastewater is reduced by about 300L. The recycling method utilizes the production wastewater (mother liquor) of DBNPA as solvent for dissolving CAA. Then, the filtering is carried out. After the foreign bodies are removed, the filtered solution is combined with the production wastewater to produce DBNPA products. On one hand, the water usage amount can be reduced, and on the other hand, the wastewater treating capacity of DBNPA during the synthesizing process can be reduced, and the liquid yield is improved.

The invention provides a disinfectant composition containing DBNPA, including: 10-20wt% DBNPA, 24-39wt% organic solvent, 39-63wt% water, 1-3wt% stabilizer and 0.04-0.08wt % regulator. The invention also provides a method for preparing the above-mentioned DBNPA-containing disinfectant composition. The disinfectant composition of the present invention uses a lower amount of organic solvent than in the prior art, thereby achieving better stability.

The invention discloses an oxidation-reduction potential adjusting agent, and a preparation method and application thereof. The oxidation-reduction potential adjusting agent comprises the following components in parts by weight: 10 to 50 parts of DBNPA, 9.5 to 90 parts of deionized water and 0.005 to 0.5 part of xanthan gum. The oxidation-reduction potential adjusting agent of the invention makesthe oxidation-reduction potential of a system reach 100-200 mv, makes an added preservative to be not damaged by a reducing substance and maintain long-term stability, and achieves good anti-corrosioneffect.

A dispersion of 2,2-dibromo-3-nitrilopropionamide (“DBNPA”) particles in a restrictedly viscosified concentrated brine solution effectively negates gelling of the brine solution because the naturally occurring gum used does not exhibits Ellis-Plastic behavior in the concentrated brine at a pH of from about 1 to 4. Because the DBNPA particles are much less soluble in the brine than in water, the particles are held in the stable dispersion. Moreover, a dispersion of DBNPA particles in viscosified brine provides at least the same biocidal effect as a solution of DBNPA, relative to the same concentration of DBNPA in solution in glycol, but also concurrently nullifies the degradation of the DBNPA during storage so that the loss due to hydrolysis of the DBNPA is less than 3% over a period of three months at a temperature in the range from −5° C. to 25° C. A process is disclosed for making the dispersion which can be stored at a temperature in the range from about −5° C. to 25° C. for up to three months with less than 3% by weight of the DBNPA particles settling out, and with less than 3% degradation of the DBNPA, provided the desired salt solution is made first and the remaining ingredients added thereafter.

The invention provides a composite antisludging agent of a reverse osmosis / nanofiltration system. The composite antisludging agent comprises the following components in percentage by weight: 2%-10% of cyclodextrin solution, namely a component I, 80%-90% of at least one or a mixture of amino trimethylene phosphonic acid (ATMP), a copolymer of maleic anhydride-acrylic acid (MA-AA), 2-phosphonic acid butane-1, 2,4-tricarboxylic acid (PBTCA), and hydroxyl ethylidene diphosphonic acid (HEDP), namely a component II, and 1%-10% of 2,2-dibromo-2-cyano-acetamid (DBNPA), namely a component III. The composite antisludging agent is prepared by mixing the component II and the component III, and then fusing the obtained mixture with the component I. When being applied to the reverse osmosis / nanofiltration / ultrafiltration system, the composite antisludging agent can be used for effectively relieving the pollution to the reverse osmosis / nanofiltration / ultrafiltration system caused by polcard, calcium sulphate salt, barium sulfate, strontium sulfate, calcium fluoride, colloidal iron and colloidal silica, relieving biological contamination simultaneously, improving the working efficiency of the system, prolonging the cleaning period and the service life of the reverse osmosis / nanofiltration / ultrafiltration system, and reducing the cost of reverse osmosis.