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

The invention belongs to the environmental protection field, concretely relating to a green environmental-protection composite corrosion inhibition antifouling agent for water circulating cooling, compounded of antifouling dispersants and corrosion inhibitors: polyepoxy sodium succinate, polymerized sodium aspartate, hydrolyzed polymaleic anhydride, sodium gluconate, zinc salt, in the mass ratio of 1-6 to 1-4 to 2-6 to 1-2 to 1-2. And it has characters of no phosphorus and biodegradability, an environment-friendly water quality stabilizer, used in a water-circulating cooling system to play the role in corrosion inhibition and antifouling.

The invention relates to methods for preparing and applying a modified polyaspartic acid scale inhibitor, which belong to the field of preparation and application of scale inhibitors. The method for preparing the modified polyaspartic acid scale inhibitor comprises the following step of: preparing polysuccinimide (PSI), polyaspartic acid (PASP) and modified polyaspartic acid (CSN-PASP). The scale inhibitor prepared by using the method has good adaptability at the temperature of 50-80 DEG C and the pH value ranging from 6.0 to 8.5. The modified polyaspartic acid scale inhibitor belongs to a polymer type scale inhibitor. A PASP molecule does not contain phosphorus, has no poison, does not destroy the ecological environment and has favorable biodegradability and water solubility, and the excellent scale inhibiting dispersion performance is particularly suitable for industrial water treatment. The aim for improving the scale inhibiting performance of the PASP is achieved by just adding a micromolecule substance in synthesis without changing other process conditions.

The invention belongs to the technical field of oilfield flooding treatment, and particularly relates to a composite multiple dirt dispersion agent for oilfield flooding treatment and a preparation method thereof. The composite multiple dirt dispersion agent is composed of polyepoxysuccinic acid sodium, polyaspartic acid sodium, polymaleic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, hexamethylenediamine tetra(methylene phosphonic acid) hexapotassium salt and polyamidoamine using hexamethylene diamine as the core. The composite multiple dirt dispersion agent has the characteristics of less consumption and wide range of application, can effectively prevent deposition of calcium carbonate, calcium sulfate, barium sulfate and silicate of an oilfield flooding system, and is applicable to the oilfield flooding system under conditions of high temperature, hypersalinity and high alkalinity as well as the oilfield flooding system under the conditions of high temperature, hypersalinity and high acidity.

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 relates to the fields of preparation and application of a modified polyepoxysuccinic acid scale and corrosion inhibitor, and particularly relates to preparation and application methods of a modified polyepoxysuccinic acid scale and corrosion inhibitor which has good biodegradability and water solubility and can be used in water treatment agents. The preparation method comprises the following steps: cyclization reaction and purification of a cyclization product; preparation of a polyepoxysuccinic acid product; and preparation of modified polyepoxysuccinic acid. The modified polyepoxysuccinic acid scale and corrosion inhibitor can be applied under the conditions that temperature is 60-90 DEG C, pH value is 6.0-9.0 and scale inhibition rate is 90-95%. The preparation and application methods have the advantages that: the original complexing capability of polyepoxysuccinic acid is improved, and thus the purpose of improving scale and corrosion inhibition efficiency is finallyachieved; and other process conditions are not changed, and only a low-molecular-weight substance is added in synthesis, thus the purpose of increasing scale and corrosion inhibition performance of polyepoxysuccinic acid is achieved.

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 provides a polyepoxysuccinic acid derivative scale inhibitor. A preparation method of the polyepoxysuccinic acid derivative scale inhibitor comprises the step of cyclization reaction and purifying of a cyclized product, preparation of a polyepoxysuccinic acid product, and the step of preparation of polyepoxysuccinic acid derivative Lcys-PESA (Polyepoxysuccinic Acid). The preparation method comprises the following concrete steps in sequence: placing the product of PESA into a three-necked flask; adding L-cysteine; transferring the three-necked flask in a methylsilicone oil bath to heat until reaching 110 to 120 DEG C; starting to adjust the pH; fully stirring to react; drying through a drying device, so as to obtain an L-cysteine modified polyepoxysuccinic acid derivative; porphyrizing; and storing in a seal way to stand by service. The polyepoxysuccinic acid derivative scale inhibitor is applied to the conditions with temperature of 55 to 85 DEGC, pH of 5.0 to 10.0, and scale inhibiting ratio of 90 to 98%. According to the preparation and application methods of the polyepoxysuccinic acid derivative scale inhibitor, small molecular substances, which are free from phosphorus and nontoxic, brings no damage to the ecological environment and are higher in biodegradability and water solubility, are added during synthesizing; and the polyepoxysuccinic acid derivative scale inhibitor excellent in scale inhibiting and dispersing performance is specially suitable for being applied to treatment of industrial water.

The invention provides a phosphorus-free corrosion and scale inhibitor for treating strong corrosive water and application and a use concentration detection method thereof. The phosphorus-free corrosion and scale inhibitor for treating strong corrosive water comprises 20-60% by weight of polyepoxysuccinic acid, 5.5-25% by weight of S-carboxyethyl thiodisuccinic acid, 5-43% by weight of long-chain alkyl polyether amide, 10-35% by weight of quadripolymer containing AMPS (1-Acrylanmido-2-Methylpropanesulfonic Acid), 0.2-1% by weight of benzotriazole, 0.5-5% by weight of water soluble fluorescent compound, 1.5-3% by weight of pH value regulator, 0-15% by weight of zinc salt and 10-40% by weight of deionized water. The phosphorus-free corrosion and scale inhibitor has remarkable corrosion inhibition property. The concentration of the phosphorus-free corrosion and scale inhibitor can be detected by a fluorescent analysis method, and the phosphorus-free corrosion and scale inhibitor is particularly suitable for treating strong corrosive water. The phosphorus-free corrosion and scale inhibitor for treating strong corrosive water is used in industrial circulating cooling water and combined with the use concentration detection method, so that the successful application of the phosphorus-free corrosion and scale inhibitor for treating strong corrosive water in the industrial circulating cooling water becomes possible.

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 a method for preparing polyacrylic acid-2-acrylamide-2-methyl propanesulfonic acid. The method mainly comprises the following steps: 5 to 30 mass percent of crylic acid, 1 to 15 mass percent of 2-acrylamide-2-methyl propanesulfonic acid, 0.5 to 6 mass percent of persulfate, 0.2 to 3 mass percent of sodium sulfite, 0.05 to 3 mass percent of L-ascorbic acid, 0.5 to 9 mass percent of ethanol, 0.5 to 3 mass percent of dodecyl mercaptan and 50 to 85 mass percent of water are mixed to have polymerization reaction for not less than one hour at a temperature of between 35 and 60 DEG C to obtain the polyacrylic acid-2-acrylamide-2-methyl propanesulfonic acid. The method has the advantages the polyacrylic acid-2-acrylamide-2-methyl propanesulfonic acid with low molecular weight is synthesized once, has low starting reaction temperature, less energy consumption, rapid reaction speed, high utilization efficiency of equipment, a simple process and convenient operation.

The invention provides a bactericidal scale and corrosion inhibitor for seawater desalination, and belongs to the technical field of chemical engineering. The bactericidal scale and corrosion inhibitor comprises, by weight, 10-15% of polyquaternary ammonium salt, 20-30% of sodium polyepoxysuccinate, 20-30% of polyaspartic acid-polymaleic anhydride, 5-10% of a zinc salt, 5-10% of dodecyl dimethyl benzyl ammonium bromide, and the balance of water. The bactericidal scale and corrosion inhibitor has scale inhibition, corrosion inhibition and sterilization functions, and all components of the bactericidal scale and corrosion inhibitor have very good intermiscibility, cooperativity and complementarity, so the bactericidal scale and corrosion inhibitor can substitute present single function scale and corrosion inhibitors and bactericides, and has comprehensive functions; and a formula and a preparation method of the bactericidal scale and corrosion inhibitor are green, compound raw materials adopted in the invention contain no phosphorus and cause no water eutrophication, discharged water causes no pollution to environment, and the preparation method is simple and feasible, is a clean technology, and has no emission of industrial three wastes.

The invention relates to a dispersing agent, in particular to a dispersing agent for printing and dyeing. The dispersing agent comprises the following components in parts by mass: 50 to 70 parts of a dispersing agent as shown in a general formula I, 30 to 40 parts of organic phophonic acid and 25 to 35 parts of polyacrylic acid or salt thereof. The dispersing agent as shown in the general formula I has high scale-inhibiting and dispersing properties on calcium carbonate, calcium sulfate, barium sulfate, calcium fluoride and silicon scale, also has an excellent corrosion-inhibiting effect and is a polynary scaling inhibitor. The polyacrylic acid or the salt thereof can disperse microcrystals or silt of the salt such as calcium carbonate and calcium sulfate into water to avoid precipitation so as to fulfill the scale-inhibiting purpose. The dispersing agent as shown in the general formula I and the organic phophonic acid mutually cooperate to have good synergistic effect; furthermore, the dispersing agent has high biodegradability, is widely applied and has high solubility with other aids for printing and dyeing.

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 relates to methods for preparing and applying a modified polyaspartic acid scale inhibitor, which belong to the field of preparation and application of scale inhibitors. The method for preparing the modified polyaspartic acid scale inhibitor comprises the following step of: preparing polysuccinimide (PSI), polyaspartic acid (PASP) and modified polyaspartic acid (CSN-PASP). The scaleinhibitor prepared by using the method has good adaptability at the temperature of 50-80 DEG C and the pH value ranging from 6.0 to 8.5. The modified polyaspartic acid scale inhibitor belongs to a polymer type scale inhibitor. A PASP molecule does not contain phosphorus, has no poison, does not destroy the ecological environment and has favorable biodegradability and water solubility, and the excellent scale inhibiting dispersion performance is particularly suitable for industrial water treatment. The aim for improving the scale inhibiting performance of the PASP is achieved by just adding a micromolecule substance in synthesis without changing other process conditions.

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 green corrosion inhibitor for inhibiting carbon steel from corrosion in a seawater medium and a preparation method and application of the green corrosion inhibitor and belongs to the field of corrosion protection of carbon steel. The green corrosion inhibitor consists of 5-15 parts of calcium gluconate, 5-15 parts of polyaspartic acid, 5-20 parts of sodium tungstate, 20-40 parts of sodium gluconate, 5-13 parts of dodecyl polyglucoside, 0.5-0.8 part of isopropyl palmitate and 25-35 parts of water. The preparation method comprises the following steps: (a) dissolving calcium gluconate in water in proportion, and performing stirring for dissolution; (b) adding sodium tungstate into the obtained solution in proportion, and performing stirring for dissolution; (c) sequentially adding sodium gluconate, polyaspartic acid and dodecyl polyglucoside in proportion, and stirring for dissolution; and (d) adding isopropyl palmitate in proportion, and performing stirring for 10-15 min. The green corrosion inhibitor has the advantages of being simple in preparation technology, mild in preparation condition and easy to prepare.

The invention relates to the preparation and application field of a multifunctional polyepoxysuccinic acid derivative scale inhibitor and in particular relates to a preparation method and application method of the multifunctional polyepoxysuccinic acid derivative scale inhibitor which has good biodegradability and water solubility and can be applied to a water treatment agent. The preparation method comprises the following steps: carrying out cyclization reaction and purifying a cyclization product, preparing a polyepoxysuccinic acid product, and preparing the multifunctional polyepoxysuccinic acid derivative. The multifunctional polyepoxysuccinic acid derivative scale inhibitor is applied when the pH value is 6.0-10.0, blocking calcium carbonate scale inhibition rate is in a range of 85%-90% and blocking calcium phosphate scale inhibition rate is in a range of 40%-80%. By utilizing the multifunctional polyepoxysuccinic acid derivative scale inhibitor, the multifunctional scale inhibition capacity of original polyepoxysuccinic acid is improved and purpose of improving the scale inhibition efficiency is finally achieved. Only a small molecule material is added into synthesis to achieve the purpose of increasing the multifunctional scale inhibition capacity of the polyepoxysuccinic acid without changing other process conditions.

The invention relates to a high-efficiency grey water dispersing agent which is a composition consisting of 40-60 percent of acrylic acid-2-polyscrylide-2-methyl acrylsulfonate, 15-35 percent of 2-phosphate-1,2,4-tricarboxylic acid butane, 5-25 percent of amino trimethylene phosphonic acid, 5-15 percent of hydroxyethylidene-1,1-diphosphonic acid and 5-15 percent of hydrolytic polymaleic anhydride. The dispersing agent is stable in property under the conditions of 40MPa and 250 DEG C, has a high dispersing capacity at the high temperature of 300 DEG C, has a good dispersing function on high-basicity, high-hardness, high-PH value and high ash content and high concentration multiple under the required high-concentration times in a water-coal-slurry pressurization and gasification device, can effectively delay the scale forming tendency and is applicable to a circulating cooling water system in industries such as power, metallurgy and papermaking. The addition in a water system is determined according to the water quality and working conditions, and the amount is 50-80mg / l according to the flow sum of a low-pressure grey water pump and a high-pressure grey water pump.

The invention discloses a method for synthesizing polymaleic anhydride with a high molecular weight in a water phase. The method comprises the following steps: adding quantitative water and solid polymaleic anhydride into a reactor, heating to a certain temperature, adding a catalyst, heating further until the temperature reaches a process required range, and dropwise adding hydrogen peroxide, wherein the addition amount of hydrogen peroxide needs to be controlled reasonably to ensure that enough hydroxyl radicals can be provided and the generation of a large amount of dissolved oxygen in the product can be prevented. The polymaleic anhydride synthesized by adopting the method has molecular weight of 800-1,000, can be fully dissolved in water, is high in chemical stability and decomposition resisting temperature and can be applied to circulating cooling water to disturb and destroy scale forming substances and disperse precipitates effectively and has strong precipitate dispersion effect, so that the scale forming substances and the sludge can be fluidized and discharged out of a system easily. The dispersion effect of polymaleic anhydride is 2 to 3 times that of the traditional polymaleic anhydride.

The present invention belongs to the field of circular cooling water treating technology, and is especially one kind of low phosphate green composite corrosion and scale inhibitor for treating circular cooling water and its usage. The green composite corrosion and scale inhibitor is compounded with polyepoxy sodium succinate, polysodium asparate, polymaleic acid, organic phosphonic acid, imidazoline type corrosion inhibitor, sodium gluconate, zinc salt and other antiscaling dispersant and corrosion inhibitor. When it is used, the green composite corrosion and scale inhibitor is added directly into circular cooling water. The green composite corrosion and scale inhibitor features its low phosphate content, biodegradability and environment friendship.

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 relates to a reverse osmosis membrane scale inhibitor for reusing non-phosphorus reclaimed water and a preparation method of the reverse osmosis membrane scale inhibitor. The reverse osmosis membrane scale inhibitor for reusing the non-phosphorus reclaimed water comprises the following components: a sulfonate copolymer, polyepoxysuccinic acid, polyaspartic acid, benzisothiazolinone and deionized water. The invention also relates to the preparation method of the reverse osmosis membrane scale inhibitor for reusing the non-phosphorus reclaimed water. According to the reverse osmosis membrane scale inhibitor for reusing the non-phosphorus reclaimed water and the preparation method of the reverse osmosis membrane scale inhibitor, phosphorus and carboxylic acid homopolymers are not contained, thus the environment can be protected well on the premise that the scale inhibiting effect is ensured, and the generation of the calcium phosphate scale and the calcium gel is avoided.

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.