54results about How to "Good scale inhibition and dispersibility" patented technology

The invention discloses a non-phosphorus corrosion and scale inhibitor. The non-phosphorus corrosion and scale inhibitor is prepared from the following components in percentage by weight: 8 to 12 percent of hydrolytic polymaleic anhydride, 10 to 15 percent of polyepoxysuccinic acid, 15 to 20 percent of acrylic acid-2-acrylamido-2-methylpropanesulfonic acid multipolymer, 10 to 15 percent of carboxylic acid-sulfonic acid-acrylate terpolymer, 8 to 12 percent of acrylic acid-hydroxypropyl acrylate copolymer, 4 to 8 percent of zinc sulphate heptahydrate and the balance of deionized water. The invention further discloses a preparation method of the corrosion and scale inhibitor. The preparation method comprises the following steps: weighing the components according to the formula; adding the components into a stirrer in sequence; stirring at normal temperature and under normal pressure to obtain the corrosion and scale inhibitor. The corrosion and scale inhibitor disclosed by the invention has the advantages of freeness from phosphorus, adoption of safe and environment-friendly components, simple production process, high scale-inhibiting efficiency, high corrosion-inhibiting performance, prevention of eutrophication of a water body caused by discharge of phosphorus, and very high compatibility; the adhesion of microorganisms to equipment can be reduced effectively, and the corrosionand and scale inhibiting performance can be enhanced greatly.

The invention belongs to the technical field of industrial water treatment, and particularly relates to an environmental protection type composite dirt dispersion agent used for oil field water flooding treatment. The dirt dispersion agent takes polyasparagic acid, polyepoxy sodium succinate and hydrolyzed polymaleic anhydride as effective components; and the total content of the effective components is no less than 35 percent. The weight ratio of the effective components of polyasparagic acid: polyepoxy sodium succinate: hydrolyzed polymaleic anhydride is 4-12.5:1-5: 5-9. The environmental protection type composite dirt dispersion agent is phosphorus free, innocuous and biologically degradable, and has low use cost. The environmental protection type composite dirt dispersion agent can effectively prevent the sedimentation of calcium carbonate, calcium sulphate and barium sulphate, and is suitable for the dirt dispersion treatment in an oil field water flooding system.

The invention relates to a low-phosphorus efficient scale and corrosion inhibitor for circulating water treatment, and a preparation method thereof, and belongs to the technical field of circulating cooling water treatment. The low-phosphorus efficient scale and corrosion inhibitor for circulating water treatment is prepared by compounding a scale and a corrosion inhibitor A and a scale and a corrosion inhibitor B according to the weight ratio of 1:1 to 1:5, wherein the scale and corrosion inhibitor A is prepared by mixing polyepoxysuccinic acid, sodium gluconate, an imidazoline type corrosioninhibitor and water; and the scale and corrosion inhibitor B is prepared by mixing hydrolytic polymaleic anhydride, an acrylic acid/2-acrylamide-2-methallyl sulfonate copolymer, 2-phosphonic acid butane-1,2,4-tricarboxylic acid, zinc salt and water. The low-phosphorus efficient scale and corrosion inhibitor for circulating water treatment has low phosphorus content and high calcium and alkali tolerance, can resist corrosion of high-concentration Cl<-> and SO4<2->, and has good corrosion and scale inhibition effects; meanwhile, the invention provides a simple, convenient and rapid preparationmethod.

The invention discloses a high-efficiency low-phosphorus corrosion and scale inhibiting dispersant and its preparation method. The high-efficiency low-phosphorus corrosion and scale inhibiting dispersant comprises: 2%-12% of sodium benzoate, 1%-5% of molybdate (or tungstate), 1%-2% of thiazole, 3%-6% of anhydrous zinc chloride, 8%-18% of polyphosphonocarboxylate, 5%-15% of acrylic acid-2-methyl-2-acrylamido propane sulfonic acid copolymer, 3%-6% of a stabilizer, 3%-6% of a tracer, and the balance deionized water. The dispersant of the invention can be widely applicable to water quality treatment of circulating water with a sum of hardness and alkalinity of less than 1100mg/L, a chloride ion concentration of less than 1000mg/L, pH of 6.8-9.5, and turbidity of less than 20NTYU. The dispersant provided in the invention has scale and corrosion inhibiting performances able to meet the requirements of industrial circulating water design specifications and a wide source water quality application range, and has the advantages of low phosphorus, environmental protection, strong chlorine resistance, applicability for auto-medicating control, as well as convenient use, etc.

The invention belongs to the technical fields of industrial feed water treatment and advanced wastewater treatment and relates to a reverse osmosis scale inhibitor. The scale inhibitor comprises the following components by weight percent: 50-70% of maleic acid-acrylic acid copolymer, 10-25% of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 1-5% of isothiazolinone and 8-20% of urotropin. The scale inhibitor provided by the invention has high scale inhibition performance, is suitable for water with high hardness, contains bactericidal ingredients so that bacteria and algae can not propagate on the membrane and has various functions of inhibiting bacteria, corrosion and scale.

The invention discloses an epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor, and belongs to the technical field of reverse osmosis membrance water treatment chemicals. The scale and corrosion inhibitor is synthesized by copolymerizing epoxysuccinic acid and itaconic acid as monomers. A general formula (I) of the polymer is defined in the specification, wherein both m and n are integers of 1-10. The invention furthermore discloses a preparation method for the epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor. According to the epoxysuccinic acid-itaconic acid copolymerized green scale and corrosion inhibitor, functional groups such as carboxyl groups, ether groups and the like are introduced in molecules, so that the polymer has excellent scale inhibition and dispersion performance for calcium carbonate and calcium sulfate, and has a certain corrosion inhibition effect on carbon steel; and the scale inhibition rates of the epoxysuccinic acid-itaconic acid copolymer to calcium carbonate and calcium sulfate can both reach 100.0% when the dosage of the epoxysuccinic acid-itaconic acid copolymer is 18mg.L<-1>. According to the preparation method, raw materials for synthesizing the copolymer are easily available, reaction conditions are mild, a copolymerized product is biodegradable, non-phosphorus and free of environmental impact, and synthetic and post-treatment costs are low.

The invention discloses a scale inhibitor with soda ash mother liquor and belongs to the technical field of fine chemical products. The scale inhibitor comprises the following components in part by mass: 50 to 70 parts of HK-101 scale inhibitor, 5 to 15 parts of sodium gluconate, 10 to 20 parts of polyepoxysuccinic acid and 3 to 7 parts of pH regulator, wherein the HK-101 scale inhibitor is prepared through crylic acid, maleic acid, hydroxy-propyl acrylate, an initiator and a molecular weight regulator. The scale inhibitor applied to the soda ash mother liquid can prolong the scaling time of calcium ions and magnesium ions in the mother liquid, reduces the chemical cleaning frequency of a soda ash mother liquid production system from 2 to 4 times per year to 1 time per 2 to 3 years, guarantees long-period and stable operation of soda ash mother liquid production, greatly reduces damage to equipment caused by chemical cleaning and does not influence the quality of the soda ash product.

The invention relates to a solid corrosion and scale inhibitor and a processing method thereof, and belongs to the technical field of oil-water well scale prevention. The solid corrosion and scale inhibitor comprises the following components in parts by weight: 30 to 35 parts of imidazoline quaternary ammonium salt, 8 to 10 parts of organic phosphoric acid, 1-3 parts of fungicide, 0.5-1 part of dispersant, and 20-30 parts of water. The processing method comprises the following step of evenly dispersing the imidazoline quaternary ammonium salt, the organic phosphoric acid and the fungicide in the dispersant of the network structure to form a solid block. A long-acting slow-release mechanism is that the dissolution rate of an oil-soluble slow-release regulator with a network structure achieves slow and stable release, so that the imidazoline quaternary ammonium salt and the organic phosphoric acid are uniformly dispersed in an oil-water mixture in a shaft to form the scale inhibitor withcomprehensive effects of slow release, scale inhibition and sterilization, and the user performance is high..

The invention discloses a corrosion inhibitor for inhibiting copper corrosion in saline water (seawater) and a preparation method of the corrosion inhibitor, belonging to the field of corrosion prevention. The corrosion inhibitor is composed of 3-9 parts of calcium gluconate, 5-15 parts of sodium tungstate, 2-8 parts of sodium gluconate, 1-3 parts of tolytriazole, 0.6-2 parts of polyaspartic acid, 0.3-0.8 part of dodecyl glucoside, 0.2-0.5 part of methylchloroisothiazolinone and 10-15 parts of water. The preparation method comprises the following steps: (a) dissolving calcium gluconate into water according to a certain ratio, and dissolving by stirring; (b) adding tolytriazole into the solution according to a certain ratio, and dissolving by stirring; (c) sequentially adding sodium tungstate, sodium gluconate, polyaspartic acid and dodecyl glucoside according to a certain ratio, and dissolving by stirring; and (d) finally, adding methylchloroisothiazolinone according to a certain ratio, and stirring for 10-15 minutes. The corrosion inhibitor disclosed by the invention is simple in preparation process, mild in condition, convenient to use and environmentally friendly.

The invention discloses a special scale inhibitor for an MVR system. The special scale inhibitor for the MVR system is composed of the following raw materials: an acrylic acid-styrene sulfonate copolymer, organic phosphonic acid, an allyl polyoxyethylene polycarboxylic acid scale inhibitor, an acrylic acid-2-acrylamide-2-methylpropanesulfonic acid-N-tert-butyl acrylamide terpolymer, an adipic acid-amine-terminated polyether-diethylenetriamine copolymer, an epoxysuccinic acid derivative, a phosphorus-containing polymer, phosphate starch and pure water. Aiming at researching the high-temperature, high-silicon and high-sulfate-radical water quality of the MVR system, the special scale inhibitor for the MVR system is prepared; the scale inhibitor has excellent scale inhibition dispersibility on sulfate, silicate and carbonate, does not influence later crystallization and salt separation, has excellent application effect and production value, and is beneficial to promoting energy conservation and emission reduction, waste salt utilization and zero emission development of enterprises.

The invention discloses a circulating water phosphorus-free corrosion and scale inhibitor and a preparation method thereof, and belongs to the technical field of water treatment agent preparation. Thecorrosion and scale inhibitor comprises the following components in parts by weight: 10-20 parts of polyepoxysuccinic acid or polyaspartic acid, 10-35 parts of sodium gluconate, 10-20 parts of acrylic acid-2-acrylamide-2-methyl propane sulfonic acid copolymer, 5-10 parts of zinc salt, 3-15 parts of molybdate, 1-3 parts of a copper corrosion inhibitor, 1-2 parts of a fluorescent tracer, 1-2 partsof a pH regulator, 5-10 parts of isothiazolinone and the balance of water. The phosphorus-free corrosion and scale inhibitor has the advantages of high corrosion inhibition rate, high scale inhibitionrate, low cost, no phosphorus, wide scale inhibition spectrum, wide pH application range, sterilization and slime stripping effects, low toxicity, chloride resistance, simple operation, controllablecirculating water agent concentration, safety and high efficiency, and belongs to an environment-friendly corrosion and scale inhibitor.

The invention discloses a seawater desalinizing scale inhibitor and a preparation method thereof. The seawater desalinizing scale inhibitor comprises the following raw materials: trisodium phosphate,amino sanya methylphosphonic acid, polyaspartic acid, benzotriazole, water, chitosan, zinc borate, water-soluble copper sulfide, gluconic acid, sodium hypophosphite, alkenyl glyceroether, diacetylmonoxime, itaconic acid, hydroxyethyl diphosphonic acid and 2-enzothiazole; the product is mainly applied to seawater desalinization, has high calcium tolerance and high scale-inhibiting dispersibility, is antibacterial and bacteriostatic, avoids environmental pollution and has corrosion inhibition rate being 97 to 99.9 percent; the product also can be applied to submarine oil field return water and oil conveying pipelines, can prevent metal ions, particularly barium and strontium ions from forming scale, has the pH value of 7 to 9 and has environmental friendliness; and the scale inhibitor has small use amount, operation concentration of 5 to 25*10<-6> and durable effect, has the scale-inhibiting effect of 98 to 99 percent after being placed for one month at 50 to 60 DEG C, has high temperature resistance, scale-inhibiting stability and corrosion-inhibiting property, and avoids discharge of three wastes in the synthesis process.

The invention discloses a novel corrosion inhibition dispersing agent, and belongs to the field of chemical engineering wastewater treatment. The novel corrosion inhibition dispersing agent is prepared from the following raw materials in parts by weight: 20-30 parts of a biological leavening agent, 15-35 parts of 2-phospho-1,2-4-butane tricarboxylate, 5-15 parts of hydroxyethylidene-1,1-diphosphonic acid (HEDP), 5-15 parts of hydrolytic polymaleic anhydride (PHMA), 5-15 parts of a dirt dispersion agent terpolymer and 60-80 parts of water. The novel corrosion inhibition dispersing agent is applicable to grey water treatment in a coal water slurry gasification technology and various powdered coal gasification technologies, can effectively slow down the influences of scaling and corrosion ofgrey water to production equipment, can reduce emissions, improves the repeated utilization rate of the grey water, and is worth popularizing and applying in the field of chemical engineering wastewater treatment.

The invention relates to a phosphorus-free non-nitrogen scale inhibition dispersant and a preparation method thereof. The phosphorus-free non-nitrogen scale inhibition dispersant is obtained by copolymerizing itaconic acid, maleic acid and sodium methallyl sulfonate, wherein the molar ratio of itaconic acid to maleic acid to sodium methallyl sulfonate is 2: 1: 1. The preparation method comprises the following steps: firstly, adding a certain amount of deionized water into itaconic acid and maleic acid; stirring and dissolving, adding ammonium persulfate and isopropanol; reacting, and adding sodium methallyl sulfonate and ammonium persulfate; and carrying out polymerization. The phosphorus-free non-nitrogen scale inhibition dispersant has excellent biological degradability and water treatment performance; the preparation method provided by the invention has the advantages that the operation is simple, hydrogen peroxide is not required to be added, the polymerization time is short, themolecular weight of the synthesized polymer is about 2000, the scale inhibition dispersion performance is good, and the product performance is greatly improved.