54results about How to "High anti-scaling efficiency" 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.

At present, most scale inhibitor of fresh water contains phosphorus so as to be not environment-friendly, and when the existing non-phosphorus scale inhibitor of the fresh water is applied to seawater, the scale inhibition efficiency is low since the water quality of the seawater is more different from that of the fresh water. The invention discloses a scale inhibitor specially used for a seawater circulating cooling water system, which is characterized by comprising the components by weight percent: 20-40% of polyacrylic acid (PAA), 20-35% of acrylate copolymer, 10-30% of hydrolytic polymaleic anhydride, 10-20% of polyaspartic acid and 5-15% of surface active agent. The invention uses monomers to form non-phosphorus component which is the non-phosphorus scale inhibitor and is in accordance with the environmental protection requirements; and the invention has the characteristic of high efficiency in scale inhibition, and leads the fresh water to be replaced by the seawater which is taken as industrial circulating cooling water and is popularized and applied.

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 invention discloses a method for preparing a phosphine poly-maleic anhydride water scale inhibitor. The method comprises the following steps of: (1) adding maleic anhydride, hypophosphite compound and a catalyst into a reaction vessel which is provided with a thermometer, a stirrer and a reflux condenser, wherein the dosage of the catalyst accounts for 0.004 to 0.02 percent of the total mass of materials; adding water, dissolving the maleic anhydride and the hypophosphite compound in water under a gradually heating condition, starting the stirrer to uniformly mix; (2) adding oxidant and water into a dripping tank, and uniformly mixing, wherein the mass ratio of the maleic anhydride to the hypophosphite compound to the oxidant is 0.5-1.8:0.2-0.6:0.5-1.5; and (3) slowly dripping the oxidant solution in the dripping tank into the reactor, controlling the reaction temperature to be between 60 and 120 DEG C and the reaction time to be between 0.5 and 10h, and cooling and packaging after the reaction is completed.

The invention discloses a method for synthesizing a polyepoxysuecinic acid salt, which is characterized by comprising the following steps of: dissolving maleic anhydride in deionized water; adding a solution of sodium hydroxide at 30 to 60 DEG C with stirring; adding sodium tungstate and hydrogen peroxide when the temperature is controlled to be between 60 to 100 DEG C; adjusting the pH value to 5 to 7 for reaction for 2 to 100 hours; cooling the reaction solution to below 20 DEG C; adding a precipitator, mixing and stirring the precipitator and the solution; performing suction filtration, adding water into filtrate obtained after suction filtration; keeping the pH value between 6 and 7; heating the filtrate added with water to 70 to 100 DEG C to obtain an epoxysuecinic acid salt; preparing a 0.2 to 4.0 mol/L aqueous solution of the epoxysuecinic acid salt; adding calcium hydroxide and a polymerization promoter into the aqueous solution for performing polymerization reaction till liquid turns yellowish and pasty; and cooling the yellowish and pasty liquid to room temperature to obtain the polyepoxysuccinic acid salt. The method has the advantages of good product quality, low raw material cost and product scale inhibition performance advantageous over that of the prior art.

The invention discloses a corrosion mitigation and scale inhibition method for an aluminum heat exchanger, belonging to the field of water treatment. A corrosion mitigation and scale inhibition agent used in the invention comprises polyaspartic acid, sodium silicate, phthalic diglycol diacrylate, poly(diallyldimethylammonium chloride), hexamethylenetetramine, bis(hydroxymethyl)-imidazolidinyl urea, methylisothiazolinone, trehalose, trihydroxymethyl aminomethane and water. The corrosion mitigation and scale inhibition agent prepared through an appropriate technical process has the advantages of storage stability, safe and environment-friendly components, no environmental pollution and the like, has excellent corrosion mitigation effect on an aluminum heat exchanger, is simple in preparation method, reasonable in design and easy to prepare, and has favorable application prospects.

The invention relates to a scale inhibitor containing itaconic acid. The scale inhibitor comprises the following components in parts by weight: 32-36 parts of sodium ethylenediamine tetramethylene phosphonate, 21-25 parts of tetrasodium aminotrimethylene phosphonate , 11-15 parts of sodium polyacrylate, 10-14 parts of tartaric acid, 10-14 parts of itaconic acid, 6-10 parts of methylisothiazolinone, 6-10 parts of 2,2-dibromo-3-nitrilopropionamide 10 parts, 5-9 parts of tolyltriazole, 5-9 parts of sodium sulfite, 1-9 parts of sodium lauryl sulfate, 2-6 parts of methyl amyl alcohol, 1-5 parts of licorice extract, moon peach leaf 1-5 parts of extract, 52-56 parts of water, the antiscalant of the present invention is stable in nature, has a long storage period, and has good scale inhibition effect on the precipitation of inorganic salts in the salt-discharging dark pipe, and has no effect on the salt-discharging dark pipe. Corrosion and scale inhibition efficiency is high, the dosage is small, when it is discharged to the external environment, it will not cause environmental pollution, and there is no need for subsequent treatment costs.

The invention discloses a composite coating with a cilium structure and a preparation method and an application thereof. The composite coating with the cilium structure comprises a bottom coating and a surface coating. The surface coating is applied to the bottom coating. The bottom coating and the surface coating are fixed by means of cross linking. The surface coating has the nano cilium structure. The preparation method comprises the following steps of: firstly, coating the surface of a substrate with the bottom coating; and then continuously rolling and embossing the surface coating on the coating through an aluminum oxide porous rod and curing and applying the surface coating to the bottom coating to obtain a water-scale-preventing coating product. According to the composite coating with the cilium structure, hydrophilcity of a hydrogel and the nano cilium structure generate a synergistic effect, so that the nucleating probability of mineral particles in water on the surface of the coating can be reduced, and adhesion to generated mineral microcrystals is effectively reduced.

The invention provides a phosphorus-free scale and corrosion inhibitor. The phosphorus-free scale and corrosion inhibitor is characterized by being prepared from the following components in percentages by mass: 10-12% of gluconic acid and/or a salt thereof, 5-8% of benzoic acid and/or a salt thereof, 8-10% of 2-acrylamido-2-methylpropanesulfonic acid, 5-8% of polyaspartic acid and/or a salt thereof, 5-8% of polyepoxysuccinic acid and analogues thereof, 1-3% of ethylenediaminetetraacetic acid and/or a salt thereof and the balance of water. A scale and corrosion inhibitor phosphorus-free water treatment formula is adopted, and the effect is excellent.

The invention discloses a scale inhibitor and application thereof. The scale inhibitor is prepared from the following components: polyepoxysuccinic acid (A), diethylenetriaminepenta acid (B), 2-phosphonobutane-1,2,4-tricarboxylic acid (C) and polyaspartic acid (D). The scale inhibitor disclosed by the invention has high scale inhibition efficiency; moreover, compared with a general scale inhibitor, the scale inhibitor provided by the invention still has a very high scale inhibition rate when the pH value is within the range of 9 to 11.

The invention discloses a metal oil dirt cleaning agent and a preparation method thereof and belongs to the field of cleaning agents. Based on styrene, butyl acrylate and crylic acid as main monomers,emulsion is modified, and good film forming performance, aging resistance, water resistance and salt mist resistance are achieved. The emulsion serves as the main component, an auxiliary agent for preventing corrosion of the metal surface is formed through compounding, film forming performance is good, a protective film can be formed on the metal surface after cleaning, a metal substrate can be well isolated from the outside environment, thus corrosion to the metal substrate is delayed effectively, and the metal surface is protected. The problems that at present, certain phosphorus-containingauxiliary agents and APEO surfactants are often added into metal oil dirt cleaning agents and cause large harm to the environment, the existing cleaning agents only have a cleaning function generallyand do not have a rustproof function, rustproof treatment is needed immediately after cleaning, time and labor are wasted, and cost is high are solved.

The invention relates to a scale inhibitor with good antibacterial effect, and the scale inhibitor comprises the following components by weight: 33-37 parts of ethylenediamine tetramethylene phosphonic acid, 18-22 parts of amino trimethylene phosphonic acid pentasodium, 9-13 parts of poly aspartic acid, 8-12 parts of citric acid, 10-14 parts of hydroxyethylidene-1,1-diphosphonic acid, 3-7 parts of sodium polyacrylate, 10-14 parts of dithiocyano-methane, 9-13 parts of dioctadecyl dimethyl ammonium chloride, 3-7 parts of butylated hydroxytoluene, 3-7 parts of dioctyl sodium sulfosuccinate, 3-7 parts of polyacrylamide, 1-5 parts of dandelion extract, 1-5 parts of lemon extract and 56-60 parts of water, the scale inhibitor has good inhibitory effect on bacteria breeding in a salt discharge underground pipe, has good scale inhibition effect on inorganic salt precipitation in the salt discharge underground pipe, is stable in property and long in storage period, and may not cause corrosion of the wall of the salt discharge underground pipe.

The invention provides an environment-friendly branched polyether water treatment agent (APEZ), and relates to a phosphorus-free and nitrogen-free and biodegradable environment-friendly branched polyether water treatment agent and a preparation method of the water treatment agent, belongs to the field of preparation and application of water treatment agents, and is applicable to a circulating cooling water system, in particular to high-calcium cooling water. The water treatment agent is prepared by subjecting polyether carboxylic acid reactive monomer and vinyl unsaturated double-bond containing monomer to free-radical copolymerization, and the water treatment agent has a structural formula shown in the description, wherein A is a repetition structure unit obtained by copolymerizing the vinyl unsaturated double-bond containing monomer, and the repetition structure unit has the polymerization degree x of 1 to 5000, and polymerization degree y of 1 to 5000, and the repetitive unit m is 1 to 100. A dirt dispersion agent is biodegradable, has excellent effect of inhibiting scales from Ca3 (PO4)2, CaCo3 and CaSO4, and high dispersion performance, and is an environment-friendly polyether water treatment agent.

The invention relates to the field of water treatment, in particular to a fluorescence automatic detection non-phosphorus scale and corrosion inhibitor, which is prepared from the following raw materials in percentage by mass: 20 to 25 percent of sodium gluconate, 14 to 18 percent of sodium benzoate, 3 to 6 percent of 2-acrylamide-2-methylpro panesulfonic acid, 2 to 4 percent of benzotriazole, 15to 18 percent of polyaspartic acid, 0.1 percent of fluorescent agents and the balance water. The invention also discloses processing equipment of the fluorescence automatic detection non-phosphorus scale and corrosion inhibitor. The equipment comprises a water tank, a chemical adding tube, a chemical tube and a material tube. The efficient low-phosphorus or no-phosphorus water treatment formula isused; the conventional scale and corrosion inhibitor is replaced; the scale decomposition of the circulation water system can be reduced; the scale inhibition efficiency is improved; the corrosion isreduced; the heat exchange effect of the equipment is ensured; the service life of the equipment and a pipeline is prolonged; the biological degradation is easy; the environment is protected; the high-concentration times are realized; the water consumption is reduced; the fluorescence automatic detection non-phosphorus scale and corrosion inhibitor can be conveniently connected with element tracking equipment for intelligently and automatically detecting the water quality; the chemical addition is automatically controlled; the cost is reduced.