164 results about "Alkyl dimethyl benzyl ammonium chloride" patented technology

The present invention discloses a liquid high-effective disinfectant. It is formed from (wt%) 1-2% of hyamine which is the mixture of alkyl dimethyl benzyl ammonium chloride and dialkyl dimethyl ammonium chloride, 0.1-0.5% of biguanide which is one of chlorhexidine and polyhexamethylene biguanide salt or their mixture, 3-8% of aldehyde which is one of glutaraldehyde, citrial, jasminal and myristic aldehyde or mixture of more than two kinds of them, 5-10% of surfactant, 1-5% of urea, 40-50% of hydrophilic solvent, 0.1% of EDTA sodium salt, 2.5-35% of water and 0-3% of selectable components, such as aromatic compound, colouring matter and viscosity-regulating agent.

The invention provides a disinfecting detergent and a preparation method thereof. The disinfecting detergent contains didecyldimethylammonium chloride, didecyldimethylammonium bromide, poly(hexamethylene biguanide) hydrochloride, dodecyldimethylbenzylammonium chloride, fatty alcohol-polyoxyethylene ether (9), fatty alcohol polyoxyethylen ether (7), fatty alcohol polyoxyethylen ether (8), alkyl polyglucoside, alkanolamides of fatty acids, lauramidopropyl betaine, essence, citric acid monohydrate food grade and deionized water. The method has the advantages of environmentally-friendliness, combination of disinfection and cleaning, synchronous completion of stain removal and disinfection, safety, unstimulating property, and resource conservation.

The invention relates to a chemical for cleaning a boiler, a using method and a cleaning device thereof, and belongs to the technical field of the chemical cleaning of equipment. A corrosion-inhibiting acid-washing agent comprises acid liquor, 1,3,5,7-tetraaza-adamantane, hydrazine hydrate, silicic acid, cetyl dimethyl benzyl ammonium chloride, ammonium thiocyanate and the like; a bleaching agent is citric acid solution; and a passivant consists of hydrogen peroxide and other additives. The cleaning device consists of a cleaning circulating pump, a cleaning fluid processing tank, a water injection pump and a water replenishing tank; and a plurality of ultrasonic energy converters are arranged on the outer surface of the cleaning fluid processing tank uniformly. The using method comprises the following steps of: establishing a cleaning pump station, testing under the pressure, cleaning scale deposits, bleaching the boiler and a system, passivating and performing water washing. The chemical has a simple process, is low in cost, energy-saving and environment-friendly, and avoids sour corrosion to the boiler.

The invention relates to a waterborne multi-color coating which belongs to the technical field of decoration materials for buildings. The coating comprises colored particle components and protective colloid components; the colored particle components comprise raw materials with the following weight portions: 10 portions to 20 portions of resin, 70 portions to 80 portions of butanol, 5 portions to 10 portions of cellulose and 2 portions to 5 portions of pigment; the protective colloid components comprise raw materials with the following weight portions: 0.5 portion to 1 portion of guar gum, 26.5 portions to 64 portions of water, 30 portions to 70 portions of acrylic acid emulsion, and 3 portions to 5 portions of alkyl dimethyl phenmethyl ammonium chloride, wherein, the weight ratio of the colored particle components to the protective colloid components is 3 to 4: 1 to 2. The coating has the advantages that the use, storage and transportation are quite convenient; the types of raw materials are fewer compared with the prior art, which not only reduces the cost but also is good for manufacturing; the manufacturing is convenient, the process is simple, and no equipment with high requirement is needed; the coating is safe to the users.

The invention provides a cleaning agent for cleaning calcium sulfate scale. The cleaning agent comprises the following components in percentage by weight: 10 to 30 percent of sodium citrate, 0.5 to 5 percent of dodecyl dimethyl benzyl ammonium chloride, 0.5 to 5 percent of sodium di-iso-octyl maleate sulfonate, 5 to 15 percent of absolute ethanol and 45 to 85 percent of reverse osmosis water. Thecleaning agent for the calcium sulfate scale is particularly used for removing insoluble calcium sulfate scale, can completely remove the scale, does not corrode metals, is nontoxic to human bodies and is efficient and safe, a medicament is a neutral solution, waste liquid can be safely discharged, and a phenomenon of hydrogen embrittlement can be avoided.

The invention relates to a medicine, in particular to broad-spectrum and high-efficiency antibacterial washing liquor and a preparation method thereof. The invention is characterized in that the antibacterial washing liquor is prepared by the following materials according to the weight ratio: 0.0001-2.0 of N-coconut-oil fatty-acid acyl L-arginine ethyl ester DL-pyrrolidone carboxylate, 0.0001-1.0 of dodecyl dimethyl benzyl ammonium chloride, 10.0-99.995 of water, and the balance of auxiliary materials. The broad-spectrum and high-efficiency antibacterial washing liquor has the following characteristics and advantages that pathogenic microorganisms are killed in a broad-spectrum and high-efficiency manner; ureaplasma urealytium, gonococcocci and trichomonas vaginalis can be killed in one minute; the killing rate for escherichia coli, staphylococcus aureus and candida albicans is respectively more than 99%; non-toxic; no stimulation is caused to the skin; no allergic reaction is caused; no stimulation is caused to the eyes; no stimulation is caused to vaginal mucosa; and the pH value of a preparation is close to that in the normal vagina.

The invention discloses disinfection powder for disinfecting hospital and aquaculture wastewater. The powder is prepared from the following components in percentage by mass: 20%-30% of potassium monopersulfate, 15%-20% of sodium dichloro isocyanurate, 25%-45% of dodecyl dimethyl benzyl ammonium chloride, 10%-15% of protochloride and 2%-5% of sodium hexametaphosphate. The compound disinfection powder has the advantages that (1) the compound disinfection powder is an oxidizing and non-oxidizing fungicide complex, and is good in sterilization effect; (2) the compound disinfection powder contains a dispersant component, is capable of stripping biological slime and is free of a dead angle in sterilization and disinfection; (3) the compound disinfection powder is low in consumption and does not generate secondary pollution; and (4) residual chlorine in discharged water does not exceed the standard.

The invention discloses laundry liquid and a preparation method thereof. Mild surfactants with mild washing property, high decontamination capacity, no pollution on the environment, such as fatty alcohol-polyoxyethylene ether (AEO9), dodecyl dimethylaminoacetate (BS-12), dodecyl dimethyl benzyl ammonium chloride (1227), distearyl dimethyl ammonium chloride (D1821), polyethylene glycol 6000DS diester, coconut oil diethanolamine (6501) and the like are prepared into the laundry liquid according to a certain proportion and a process; clothes washed by the laundry liquid have soft textile fibers and comfortable wear; and the laundry liquid is mainly used for washing personal clothes, sheets and bedding bags of households, sheets and bedding bags of hotels and the like.

The cleaning compound for a water dispenser includes four ingredients: a) N'alkyl dimethyl Benzyl Ammonium Chloride, within the range of 0.08 to 0.1% by weight; b) citric acid, of about 20% by weight of the total solution; c) propylene glycol (food grade), about 4% by weight; and d) sodium hydroxide (food grade), in sufficient quantity to neutralize the solution to a pH range preferably between 2.6 and 4.5. During the initial clean-up steps, and contrarily to prior art cleaning methods, the cleaning method does not require complete purge of the inner water reservoir from drinking water, due to the tacky nature of the cleaning compound which can still be effective in diluted state and in a submerged environment.

The invention discloses a composite quaternary ammonium salt disinfectant, which is prepared from the following components in terms of 1000mL of volume of the composite quaternary ammonium salt disinfectant: 5g to 30g of didecyldimethylammonium chloride, 5g to 30g of didodecyl dimethyl ammonium chloride, 10g to 50g of benzalkonium chloride, 5g to 30g of disodium ethylenediamine tetraacetate, 5g to30g of tetrasodium ethylenediamine tetraacetate, 0.1 g to 10g of polyvinylamine, 30mL-120mL of ethanol and the balance being water. The benzalkonium chloride is a compound of dodecyl dimethyl benzylammonium chloride, tetradecyl dimethyl benzyl ammonium chloride and hexadecyl dimethyl benzyl ammonium chloride in a mass ratio of (2-6): (2.5-10): 1. The composite quaternary ammonium salt disinfectant disclosed by the invention is short in virus, bacterium and fungus killing time, takes effect quickly, has broad universality, does not cause water body pollution and is environment-friendly.

The invention relates to the technical field of antibacterial hydrogel manufacturing, in particular to an antibacterial hydrogel containing organic quaternary ammonium salt or silane terminated organic quaternary ammonium salt and a preparation method thereof. The hydrogel is characterized by being prepared from, by mass, 0.1-65% of 3-(3 methoxy-silicyl)propyl dimethyl octadecyl ammonium chlorideor alkyl dimethyl benzyl ammonium chloride. Compared with the prior art, the hydrogel has the broad-spectrum antibacterial effect and the long-lasting antibacterial performance, is applicable to wounddebridement and wound dressing and has no toxic or side effect and high adhesion force and other remarkable advantages.

The application discloses a water-treated polyhexamethylene guanidine hydrochloride sterilizing agent and a preparation method thereof. The water-treated polyhexamethylene guanidine hydrochloride sterilizing agent is prepared by weighing and uniformly mixing guanidine hydrochloride, hexamethylene diamine, hexamethylenediamine, polyethylene glycol, water, methylbenzene, a polymerization inhibitor, sulphonic acid, maleic anhydride, N-t-butyloxycarboryl-1,6-diamino hexane, a dispersing agent, ferric sulfate, methacrylic acid, dodecyl dimethyl benzyl ammonium chloride and methyl acrylate according to parts by weight. The water-treated polyhexamethylene guanidine hydrochloride sterilizing agent is 100% soluble in water, has no volatility, can be completely neutralized with soaps, and has no pollution to environment; the integral of an acute skin irritancy test is 0, and the water-treated polyhexamethylene guanidine hydrochloride sterilizing agent is colorless, non-poisonous, odorless and tasteless, and has no corrosion to metal, rubber and plastic; the sterilizing rate to escherichia coli, staphylococcus aureus, candida albicans, neisseria gonorrhoeae, penicillium, aspergillus, saprophytic bacteria and salmonella is 100%, when the water-treated polyhexamethylene guanidine hydrochloride sterilizing agent is placed at 50-60 DEG C for a month, the sterilizing rate is 98-100%, when the water-treated polyhexamethylene guanidine hydrochloride sterilizing agent is placed at 40-50 DEG C for half a year, the sterilizing rate is 97.5-99.5%, and when the water-treated polyhexamethylene guanidine hydrochloride sterilizing agent is placed at the room temperature for 1-2 years, the sterilizing rate is 95-99%.

The invention discloses a calcium carbonate powder production technology. The production technology comprises crushing, homogenizing, grinding, grading, wet grinding and drying. Through use of sodium carbonate and dodecyl dimethyl benzyl ammonium chloride in homogenizing, after grinding efficiency is improved and grinding time is reduced. A water spraying device is arranged in a grinder and the sprayed atomized water improves powder weight so that the powder does not easily suspend and a grinding disc material layer is stable. The atomized water, sodium carbonate and dodecyl dimethyl benzyl ammonium chloride produce synergism to promote grinding effects. According to the technology, coarse powder subjected to dry grinding is graded and the graded secondary coarse powder is subjected to wet grinding so that wet grinding efficiency is improved and production unit energy consumption is reduced, the product particle size distribution is narrow and product fineness is uniform. The technology has the advantages of good product quality, high efficiency, simple processes, preparation convenience and low cost and is suitable for industrial large-scale production.

The invention provides a composite quaternary ammonium salt disinfectant and a preparation method thereof. The composite quaternary ammonium salt disinfectant is prepared from the following raw materials: double-long-chain quaternary ammonium salt, two single-long-chain quaternary ammonium salts, synergist isothiazolinone, nonionic surfactant fatty alcohol polyvinyl ether and water. The double-long-chain quaternary ammonium salt is dialkyl dimethyl ammonium chloride, and dialkyl is two mutually independent alkyl groups with the carbon chain length of 8 to 18; the two single-long-chain quaternary ammonium salts are respectively alkyl dimethyl benzyl ammonium chloride with the carbon chain length of 8 to 18 and alkyl dimethyl ethyl benzyl ammonium chloride with the carbon chain length of 8 to 18. The components of the composite quaternary ammonium salt disinfectant have a synergistic effect, so that the anti-interference capabilities of hard water resistance and organic matter resistance are greatly improved; not only can bacterial propagules, lipophilic viruses (enveloped viruses such as novel coronaviruses) and fungi be killed, but also hydrophilic viruses (non-enveloped viruses) can be killed. In addition, the composite quaternary ammonium salt disinfectant provided by the embodiment of the invention is high in killing speed.

The invention discloses a wood surface corrosion control method. The method comprises the following steps: (1) drying the wood until the water content is about 18%; (2) injecting the preservatives, namely 2-4 parts of propylene glycol, 30-48 parts of propene carbonate, 1-2.3 part of DCOIT, 10-25 parts of p-chloroxylenol, 1-4 parts of alkyl dimethyl benzyl ammonium chloride, 1-2.8 part of sodium chloride, 1-3 parts of sodium chlorate, 1-3 parts of potassium bromide, 5-8 parts of bronopol, 35-46 parts of dithiocyano-methane and 108-116 parts of fatty alcohol polyvinyl chloride ether in part by weight, into the wood under the vacuum high pressure condition; (3) performing high-temperature qualitative treatment for 6-12 hours on the wood after the preservatives are added; and (4) carrying out air drying on the high-temperature qualitatively treated wood to obtain the wood subjected to preservative treatment. The corrosion control method disclosed by the invention is good in corrosion control effect, the preservatives can permeate into the part being 1-2mm of the wood surface, and good mold prevention and corrosion resistance are obtained; the wood is strong in waterproof durability, is loss resistant and long in residual action, the raw materials is easily available, and the cost can be saved.

The invention discloses a hydrogen peroxide orientation catalytic composite additive. The additive is prepared by mixing the following raw materials in percentage by mass: 0.001-5% of copper salt, 0.001-0.01% of ferric salt, 0.001-5% of ammonia water, 0.001-5% of a chelating agent, 0.001-5% of dodecyl dimethyl benzyl ammonium chloride, 0.001-5% of fatty alcohol-polyoxyethylene ether, 0.001-5% of alkyl sodium sulfonate, 0.001-5% of sodium alkyl sulfate and 64.99-99.992% of purified water, wherein the total percentage by mass is 100%. The invention also discloses a method for carrying out pretreatment on cotton fabrics by using the additive. The method is characterized by comprising the following steps: placing cotton fibers or cotton fabrics to be treated in a pretreatment device, adding pretreatment water and keeping dyeing bath circulation; carrying out pretreatment on the cotton fibers or the cotton fabrics in the pretreatment device by using the hydrogen peroxide orientation catalytic composite additive.

The invention relates to the technical field of wastewater treatment and particularly relates to an oil displacing demulsifier for coking wastewater treatment. The oil displacing demulsifier comprises the following components in percentage by volume: 20-50% of dodecyl dimethyl benzyl ammonium chloride, 10-30% of tetradecyl dimethyl benzyl ammonium chloride, 0.1-0.5% of cationic polyacrylamide, 0.1-0.3% of polysiloxane emulsion and the balance of water. The invention also discloses a preparation technology and application of the oil displacing demulsifier. The oil displacing demulsifier provided by the invention is of a simple formula; the components realize a synergistic effect; and the oil, ammonia nitrogen, CODcr and suspending matters in the coking wastewater can be effectively removed.

The invention discloses aerosol for scrubbing glass windows and ceramic surfaces, which relates to a daily chemical product. The aerosol consists of the following raw materials in portion by mass: 0.03 portions of alkyl dimethyl benzyl ammonium chloride, 0.3 portions of polyethylene containing titanium dioxide, 2.1 portions of Ep-type polyether, 15 portions of ethyl alcohol, 56 portions of distilled water, 25 portions of propellent isobutane and 1.5 portions of propellent dimethyl ether. The aerosol for scrubbing the glass windows and the ceramic surfaces has the following advantages that: 1)the product is the aerosol, and compared with other cleaning agents, the aerosol is water saving and labor saving; 2) the operation is simple and convenient, so the aerosol is particularly suitable for cleaning wall bricks and the glass windows with large areas; and 3) the configuration process is simple, convenient and easy to learn, and the popularization is easy.

A method is provided for cleaning an exterior surface that is stained as a result of biological growth of an organism, such as algae, lichen, or moss. The method includes applying a cleaning composition having an effective amount of alkyl-dimethyl-benzyl-ammonium-chloride to the exterior surface. A method is also provided for preventing biodeterioration of an exterior surface. The method includes applying a cleaning composition having alkyl-dimethyl-benzyl-ammonium-chloride to the exterior surface. An exterior surface cleaning formulation has an effective amount of alkyl-dimethyl-benzyl-ammonium-chloride.

The invention discloses a disinfection technology suitable for control on microorganisms in a spatial hermetic cabin, and relates to the technical field of spatial microorganism control. The disinfection technology comprises the following processes: stage 1, disinfecting the ground before the spatial hermetic cabin is launched, carrying out fumigation disinfection in the spatial hermetic cabin with 1%-4% hydrogen peroxide steam for 2-4 hours, disinfecting equipment which is easily corroded by the hydrogen peroxide steam with 0.1% N-alkyl dimethyl benzyl ammonium chloride wet tissue, disinfecting the overall cabin with 1%-4% hydrogen peroxide steam and then installing the cabin; stage 2, disinfecting the spatial hermetic cabin in an orbit period, cleaning and sweeping once by operating personnel at an interval of 5-10 days, irradiating for 1-6 hours by virtue of a portable ultraviolet sterilization lamp after sweeping, disinfecting, locally wiping and disinfecting the surface of key equipment and the inner wall of the cabin with 0.1% N-alkyl dimethyl benzyl ammonium chloride wet tissue. The disinfection technology disclosed by the invention is capable of effectively preventing microorganism pollution of the spatial hermetic cabin, reducing the effects on spacecraft and astronauts caused by harmful microbes, and improving the operation stability of a spatial hermetic cabin system, and is suitable for control on the microorganisms in the spatial hermetic cabin.

The invention provides a preparation method of a Chinese herbal medicine skin mucosa disinfectant. The preparation method comprises the following steps: weighing 10 to 20 parts of baikal skullcap root, 10 to 20 parts of honey suckle, 10 to 20 parts of grapefruit, 5 to 10 parts of aloe, and 3 to 5 parts of lavandula angustifolia, adding the raw materials into ethyl alcohol, so as to be extracted and filtered, performing decoloration on filtrate, contracting the filtrate to the volume being 0.3 times of the original volume, so as to be standby, weighing 5 to 10 parts of garlic, adding glycollic acid to grind and filter the garlic, ensuring that filtrate is standby, then weighing 3 to 5 parts of mentha camphor, 1 to 3 parts of glycerin, 1 to 3 parts of chitosan quaternary ammonium salt, 0.2 to 0.5 part of alkyl dimethyl benzyl ammonium chloride, and 5 to 10 parts of palmitic acid sucrose ester, adding distilled water to the raw materials to dissolve the raw materials, combining the prepared liquid, and stirring the liquid to obtain the Chinese herbal medicine skin mucosa disinfectant. The Chinese herbal medicine skin mucosa disinfectant prepared by the method does not have pungent smell, is low in toxicity, weak in irritation to skin mucosa and eyes, and pollution-free for the environment, and improves the sterilization and disinfection effects because of the mating reaction between Chinese herbal medicine and disinfection active constituents.

The invention provides a naringin-containing strong-decontamination antibacterial liquid detergent and a preparation method thereof. The liquid detergent comprises the following components: naringin, alkyl polyglycoside, monoethanol amine, diethanol amine, triethanol amine, potassium oleate, sodium oleate and triethanolamine oleate. The naringin is a dihydrogen brass compound which has a good antibacterial action; the added alkyl polyglycoside and a cationic surfactant dodecyl dimethyl benzyl ammonium chloride are synergized, so that the antibacterial effect is especially outstanding. The monoethanol amine, diethanol amine and triethanol amine are all polyhydroxyl compounds, and can be well combined with clothes fibers so as to achieve the purpose of deeply cleaning clothes. The potassium oleate, sodium oleate and triethanolamine oleate are all compounds containing unsaturated bonds, and double bonds are easily combined with double bonds of molecules of oil contamination so as to achieve the strong decontamination effect. The liquid detergent is good in decontamination effect and obvious in antibacterial effect.

The invention relates to a bacteriostatic hand sanitizer and a preparation method thereof. The bacteriostatic hand sanitizer is composed of, by weight, 0.1-1.0% of alkyl dimethyl benzyl ammonium chloride, 2.0-5.0% of cocamidopropyl betaine, 4.0-8.0% of alcohol ether glucoside, 2.0-5.0% of coconut fatty acid diethanolamide, 1.0-4.0% of alcohol ether carboxylate, 0.1-0.5% of citric acid, 0.5-2.0% of glycerin, 0.1-0.5% of aloe extract, 0.1-0.5% of essence, 0.1-0.5% of EDTA-4Na, 0.2-2.0% of sodium chloride and the balance of water. The bacteriostatic hand sanitizer has high cleaning bacteriostatic capability and is mild, non-irritant, easy to flush and water-saving.

The invention relates to a mildew removal agent for a wall and a preparation method of the mildew removal agent. The preparation method of the mildew removal agent for the wall comprises the following steps: firstly, water is added to a blending tank and stirred, sodium hydroxide, hexadecylsulfonic acid sodium salt and / or tetra sodium salt of amino trimethylene phosphonic acid, sodium bromide, EDTA-4Na, N,N-dimethyldodecylamine oxide and / or dimethyl tetradecyl amine oxide, alkyl dimethyl benzyl ammonium chloride and sodium silicate and / or sodium metasilicate are added to the blending tank, finally, sodium hypochlorite is added to the blending tank, the mixture is stirred uniformly, settles for 24 h and is filtered. A special detergent for clearing mildew and mildew stains can quickly kill mildew, remove mildew stains and prevent mildew from breeding again. The mildew removal agent in the formula has good decontamination and mildew killing capacity and can quickly clear mildew and other stains on the wall.

The invention provides a Chinese herbal medicinal skin mucosa disinfection wet wipe. The Chinese herbal medicinal skin mucosa disinfection wet wipe comprises a disinfected nonwoven fabric and a disinfectant loaded on the disinfected nonwoven fabric. The disinfectant is prepared through the following steps: 1, taking 15 parts of Radix Scutellariae, 15 parts of honeysuckle flower, 15 parts of grapefruit, 8 parts of aloe and 4 parts of lavender, adding ethanol, extracting twice, mixing two extraction liquids, adding active carbon to decolor the obtained liquid mixture, filtering, and distilling the obtained filtrate until the volume of the obtained concentrate is 0.3 times the original volume; 2, taking 8 parts of garlic, adding ethanol, grinding, and filtering to obtain a filtrate for later use; 3, taking 4 parts of menthol, 2 parts of glycerin, 2 parts of chitosan quaternary ammonium salt, 0.3 parts of alkyl dimethyl benzyl ammonium chloride and 8 parts of sucrose palmitate, adding distilled water, and stirring for dissolving; and 4, mixing solutions obtained in step 1, step 2 and step 3, and uniformly stirring. The skin mucosa disinfection wet wipe has the advantages of no irritant smell, low toxicity, and weak irritation to skins, and is suitable for disinfecting skin mucosa; and the cooperation of Chinese herbal medicines and disinfection active components increases the sterilization and disinfection effects of the wet pipe.

The invention relates to a waterborne multi-color coating which belongs to the technical field of decoration materials for buildings. The coating comprises colored particle components and protective colloid components; the colored particle components comprise raw materials with the following weight portions: 10 portions to 20 portions of resin, 70 portions to 80 portions of butanol, 5 portions to10 portions of cellulose and 2 portions to 5 portions of pigment; the protective colloid components comprise raw materials with the following weight portions: 0.5 portion to 1 portion of guar gum, 26.5 portions to 64 portions of water, 30 portions to 70 portions of acrylic acid emulsion, and 3 portions to 5 portions of alkyl dimethyl phenmethyl ammonium chloride, wherein, the weight ratio of the colored particle components to the protective colloid components is 3 to 4: 1 to 2. The coating has the advantages that the use, storage and transportation are quite convenient; the types of raw materials are fewer compared with the prior art, which not only reduces the cost but also is good for manufacturing; the manufacturing is convenient, the process is simple, and no equipment with high requirement is needed; the coating is safe to the users.

The invention discloses a production method of pharmaceutical-grade calcium carbonate. The production method comprises steps of smashing, homogenizing, grinding, modifying, and freeze drying. According to the production method, sodium carbonate and dodecyl dimethyl benzyl ammonium chloride are added in the step of homogenizing so as to increase subsequent grinding efficiency, and shorten grinding time; a water injector is arranged in an adopted grinding miller, sprayed atomized water is capable of increasing powder weight, and suspension of powder is not easily caused, so that a millstone material bed is stabilized, and it is beneficial for grinding via combined action with added sodium carbonate and dodecyl dimethyl benzyl ammonium chloride; the production method is high in pharmaceutical-grade calcium carbonate yield; purity of obtained pharmaceutical-grade calcium carbonate is high, and particle size distribution is uniform; energy cost in production process is low, at the same time aggregation of fine powder in a slurry in wet grinding is not caused; operation of the production method is simple; production is convenient; cost is low; and the production method is suitable for industrialized large-scale production.

The invention provides an environment-friendly water treatment agent for central air-conditioning frozen water treatment and a preparation method thereof, comprising polyepoxysuccinic acid, potassium chloride, 2-phosphate-1,2,4-tricarboxylic butane, Add lignin to deionized water, heat and stir, then add hydrolyzed maleic anhydride, dimethylformamide, dodecyldimethylbenzyl ammonium chloride, heat up to 70-80°C, add polyacrylate, and then add Mix citric acid and ethanol, add phosphorus-free corrosion inhibitor, soybean water extract, ε-polylysine and Chinese herbal medicine water extract after cooling, mix and spray dry to obtain the first mixed powder; mix the first mixed powder and solid The acid agent is mixed to obtain the second mixed powder; the solid alkali agent and the filler are mixed to obtain the third mixed powder; the second mixed powder, the third mixed powder and the lubricant are mixed and then tabletted to obtain the target product. The water treatment agent prepared by the method of the invention is environmentally friendly, has good scale and corrosion inhibition effects, and is convenient for later use.