78results about How to "Good scale and corrosion inhibition" patented technology

The invention relates to an oil field compound type anti-scale corrosion inhibitor and a preparation method thereof, belonging to the technical field of corrosion inhibitor. The oil field compound type anti-scale corrosion inhibitor is characterized by comprising the components by mass percent: 5-10% of sodium molybdate, 10-20% of sodium phosphate, 0.5-1% of acrylic acid-2-acrylamido-2-methyl propane sulfonic acid (AA-AMPS) copolymer, 1-2% of amino trimethylene phosphonic acid and 1-2% of hydroxyl ethylidene diphosphonic acid (HEDP). The preparation method comprises the steps of: firstly, completely dissolving sodium molybdate and sodium phosphate by using water; then, adding the AA-AMPS copolymer under the condition of stirring until the copolymer is completely dissolved; subsequently, adding ATMP and the HEDP, and further stirring for dissolving; and finally, adding water until the concentration of the mixed solution is in accordance with the requirement, so as to obtain the oil field compound type anti-scale corrosion inhibitor. The inhibitor disclosed by the invention has the advantages of simple components, available raw materials, simple technology, high efficiency, low cost, low dosage, good scale inhibition, descaling and corrosion inhibition effects and the like, and is convenient to prepare, rapid.

The invention relates to a non-phosphate anti-incrustation corrosion inhibitor and a preparation process thereof. The non-phosphate anti-incrustation corrosion inhibitor is prepared from anti-incrustation ingredients, corrosion inhibition ingredients, fluorescent indicators, sodium hydroxide and deionized water, wherein the anti-incrustation ingredients comprise polyepoxysuccinic acid, hydrolytic polymaleic anhydride, and crylic acid/ethyl acrylate/2-acrylamide-2-methyl propane sulfonic acid copolymer; and the corrosion inhibition ingredients comprise methylbenzotriazole, sodium gluconate, sodium tungstate and corrosion inhibitor-imidazoline quaternary ammonium salt. The preparation process comprises the following steps: alkalizing the raw materials by utilizing solvent, stirring, mixing, warming up for dissolving, cooling for mixing, carrying out fluorescer formulation, filtering and packaging, thus obtaining the finished product non-phosphate anti-incrustation corrosion inhibitor. The components of raw materials in the invention does not contain substances such as phosphor and the like which are harmful to human body and environment, and the non-phosphate anti-incrustation corrosion inhibitor belongs to a non-toxic nuisanceless product, has good anti-incrustation corrosion inhibition effect, is beneficial to recycling of recirculating water and discharging water, does not cause drug dirt blocking to a recovery system, is biodegradable, does not cause secondary pollution, and has the function of inhibiting the bacterium growth, thus the cost for recirculating water treatment is low and the on-line monitoring control and automatic feed of the drugs can be realized.

The invention discloses a phosphorus-free composite scale and corrosion inhibitor, applications thereof, and a processing method for circulating water. The phosphorus-free composite scale and corrosion inhibitor comprises a scale inhibitor, dispersants, inorganic-salt-type phosphorus-free corrosion inhibitors and manganese salts. The scale inhibitor is polyaspartic acid and/or polyepoxysuccinic acid. The weight ratio of the scale inhibitor, the dispersants, the inorganic-salt-type phosphorus-free corrosion inhibitors and the manganese salts is 1:0.2-10:0.5-15:0.025-1, wherein the weight of the manganese salts is in terms of manganese ions. The phosphorus-free composite scale and corrosion inhibitor has good synergistic effects with non-oxidation-type bactericides, especially isothiazolinone, and can raise the bactericidal effects of the non-oxidation-type bactericides obviously, the bactericidal speed is rapid and the drug effect time is long. The phosphorus-free composite scale and corrosion inhibitor is environmentally friendly, has phosphorus-free and nitrogen-free characteristics, meets green environmental protection requirements, and reduces environmental burden. The phosphorus-free composite scale and corrosion inhibitor has a wide water quality adaptation range, and is easy to be popularized and applied.

The water treatment agent is formed from solid dispersing agent and liquid corrosion inhibitor, and its main component includes sodium humate, acrylic acid-2-acrylamide-2-methyl propylsulfoacid multicomponent copolymer and tannic acid. Said solid dispersing agent is straw colour to black colour solid which is composed of mixture of sodium humate and sulfonate, tannic acid, acidamide flocculant and surfactant, and said liquid corrosion inhibitor is formed from acrylic acid-2-acrylamide-2-methyl propylsulfoacid multicomponent copolymer and corrosion inhibitor. Its water-saving efficiency is high and corrosion and scale inhibiting effect is obvious.

The invention relates to a composite corrosion and scale inhibitor for high-chlorine-ion circulating water. The composite corrosion and scale inhibitor is a high-efficiency high-stability low-cost chlorine-ion-corrosion-resistant composed of organic phosphonic acid, phosphocarboxylic acid, polycarboxylic acid, polyphosphate, zinc salt, inorganic acid, azole and the like. The composite corrosion and scale inhibitor has favorable scale and corrosion inhibition effects on high-chlorine-ion-content medium/high-hardness water, and also has favorable corrosion inhibition effects on high-chlorine-ion-content softened water. Under favorable synergistic actions of the components, the composite corrosion and scale inhibitor provided by the invention has the advantages of high reagent compounding stability and obvious corrosion and scale inhibition effects, and can ensure the long-term safe stable operation of the circulating water system under high-chlorine-ion-content water conditions within a wider calcium ion content range.

The invention discloses a low-phosphorous environment-friendly composite scale and corrosion inhibitor. The scale and corrosion inhibitor is characterized by comprising component A and component B, wherein component A includes sodium hydroxide, benzotriazol, polyepoxysuccinic acid, sodium molybdate and deionized water, and the component B includes zinc chloride, 2-phosphonobutane-1,2,4-tricarboxylic acid, acrylic acid/2-methyl-2-acrylamido-propanesulfonic acid, hydrolytic polymaleic anhydride and deionized water. The scale and corrosion inhibitor provided by the invention is applicable to a recirculating cooling water system with high hardness and high alkalinity, especially has powerful complexation performance on carbonate scale, includes low-content phosphorous, poses no pollution to the environment and accords with requirements of environmental protection. The scale and corrosion inhibitor is applicable to carbon steel and stainless steel recirculating cooling water systems with a pH value in a range of 7.5 to 9.3 and does not need addition of an acid for adjustment of the pH value. As water quality of industries differs, the scale and corrosion inhibitor has a corrosion inhibition effect in a recirculating cooling water system with a small concentration multiple and good scale inhibition performance in a recirculating cooling water system with a great concentration multiple of 3 to 4 times.

The invention discloses a composite scale and corrosion inhibitor. The inhibitor is characterized by comprising the following main ingredients: 2-phosphono-1,2,4-tricarboxylic acid, hydroxyethylidene-1,1-diphosphonic acid, an acrylic copolymer, benzotriazole, zinc chloride, polyepoxysuccinic acid and deionized water. The inhibitor disclosed by the invention has the following beneficial effects that 2-phosphono-1,2,4-tricarboxylic acid, the hydroxyethylidene-1,1-diphosphonic acid, the acrylic copolymer, benzotriazole, zinc chloride and the polyepoxysuccinic acid of the inhibitor all have good scale and corrosion resistance; and after the above ingredients are compounded according to the weight parts in the formulation of the inhibitor disclosed by the invention, the scale and corrosion resistance effect of the inhibitor is obviously enhanced. The inhibitor disclosed by the invention is suitable for high hardness and high base, and has extremely strong complexing function on carbonate scale. The composite sale and corrosion inhibitor is good in scale and corrosion resistance, low in phosphorus content, and therefore is capable of meeting environment protection requirements. The inhibitor disclosed by the invention not only is suitable for circulating cooling water in a natural gas purification treatment plant, but also is suitable for circuiting cooling water systems in other industries of chemical fertilizer, power, textile and the like, as well as is wide in application range; and acid does not need to be added for regulating PH (Potential of Hydrogen) value.

The invention discloses an environmentally-friendly scale and corrosion inhibitor and a preparation method thereof. The environmentally-friendly scale and corrosion inhibitor comprises the following ingredients in parts by weight relative to the total mass of scale and corrosion inhibitor: 10-15% of hydrolytic polymaleic anhydride, 14-20% of acrylic acid/2-acrylamide-2-methyl propanesulfonic acid/n-tert-butyl acrylamide terpolymer, 0.5-1% of ammonium persulfate, 5-10% of carboxyalkylthiosuccinic acid, 5-8% of sodium gluconate, 1-2% of methylbenzotriazole and the balance of deionized water. The scale and corrosion inhibitor has the advantages of no phosphorus or zinc, environment protection and excellent scale and corrosion inhibition effect.

The invention relates to a water quality stabilizer, in particular to an environment-friendly water quality stabilizer which is prepared from the following raw materials in parts by weight: 25-35 parts of polyaspartic acid, 30-45 parts of polyacrylate sodium, 20-40 parts of gluconic acid sodium salt and 60-80 parts of water. The water quality stabilizer with a scenic and reasonable formula and favorable scale and corrosion inhibition property, which takes the polyaspartic acid as the main raw material, is biodegradable, environment-friendly and less in dosage and belongs to a degradable substance. The water quality stabilizer also has favorable scale and corrosion inhibiting, algae and mud separating and bacteriostasis effects, is free from pollution during pollution discharge, can replace the traditional water quality stabilizer, save resources and improve the capacity, and can be widely applied to circulating cooling water in the industries such as chemical industry, electric power, refrigeration, central air-conditioning, metallurgy, machinery and injection molding.

The present invention discloses a scale-inhibiting corrosion inhibitor composition, a scale-inhibiting corrosion inhibitor, and applications of the scale-inhibiting corrosion inhibitor. The scale-inhibiting corrosion inhibitor composition contains 1-[N,N'-bis(2-hydroxyethyl)aminomethyl]benzotriazole or a derivative thereof, a carboxylic acid group-containing homopolymer, a sulfonic acid group-containing copolymer and a water-soluble zinc salt according to a weight ratio of 1:0.5-10:0.5-10:0.3-7.5, preferably 1:2-5:2-5:0.5-3.5. According to the present invention, the environmentally friendly scale-inhibiting corrosion inhibitor does not use phosphorus-containing compounds, non-renewable molybdates or tungstates, and the like, has characteristics of no phosphorus and no nitrogen, provides high tolerance for calcium and alkali, has characteristics of high-concentration-chlorine-ion-corrosion resistance, high-concentration-sulfate-ion-corrosion resistance and wide water quality adaptation range, and provides technical conditions for circulation water operating under high concentration multiple and sewage discharge reducing; and the scale-inhibiting corrosion inhibitor has advantages of excellent scale-inhibiting corrosion inhibition, less addition amount, simple treatment process, significant effect, and easy promotion application when the scale-inhibiting corrosion inhibitor is applied in the circulation water system.

A disclosed modified water-quality stabilizing agent is prepared from the following raw materials in parts by weight: 90-110 parts of water, 30-50 parts of polyaspartic acid, 5-10 parts of zinc sulfate, 20-35 parts of sodium polyacrylate, 4-12 parts of lignin, 25-35 parts of calcium gluconate, 6-10 parts of polyphosphate, 8-16 parts of sodium molybdate, 11-18 parts of benzotriazol, 15-25 parts of sodium silicate, 3-9 parts of ferrocyanide, 15-20 parts of isopropanol, 8-14 parts of calcium carbonate and 15-25 parts of glycol. The provided modified water-quality stabilizing agent is environment-friendly, less in usage amount, excellent in scale-inhibiting rust-inhibiting performances, and suitable for large-scale popularization.

A scale and corrosion inhibitor for a power cycling water system belongs to the technical field of water treatment of a power system. The invention aims to provide a preparation method for a composite scale inhibitor which is simple in process flow, low in production cost, stable in quality and efficient in scale prevention and corrosion deceleration, and is a phosphorus-free formula product. The scale and corrosion inhibitor comprises the ingredients in percentage by weight: 15-30% of hydrolytic polymaleic anhydride, 10-20% of polyepoxysuccinic acid, 10-15% of a sulfonic acid copolymer, 5-8% of zinc salt, 2-5% of sodium salicylate and the balance of water. The compound raw materials adopted are non-toxic, low in price and efficient, and the production process of the scale and corrosion inhibitor is simple in flow, the product quality is stable, and the corrosion and scale inhibition rate is greater than 95%. Meanwhile, the production process of the scale and corrosion inhibitor is an environmental-friendly clean process which is free of industrial three waste discharge, simple to operate, low in production cost and suitable for industrialized scale production.

The invention relates to a circulating water treating agent and a preparation method thereof. The circulating water treating agent is composed of the following raw materials in parts by weight: 10-13 parts of phosphono carboxylic acid, 35-40 parts of polycarboxylic acid, 5-7 parts of zinc salt, 3-5 parts of copper corrosion inhibitor, 5-17 parts of polyepoxysuccinic acid, 3-16 parts of sodium salicylate, 5-8 parts of sodium tungstate, 1-3 parts of iron trichloride and 70-150 parts of deionized water. The raw materials are mixed in a reaction kettle according to the preset proportion to obtain the circulating water treating agent. No three wastes are discharged in the circulating water treating agent production process; the total phosphorus discharge in the circulating water is less than the maximum allowable discharge concentration in national primary standard; and the circulating water treating agent has excellent scale and corrosion inhibition performance.

The invention discloses a phosphorus-free water treatment agent, a preparation method for the phosphorus-free water treatment agent, and an application of the phosphorus-free water treatment agent in treatment of circulating water. The phosphorus-free water treatment agent is prepared from dimethyldiallylammonium chloride and unsaturated carboxylic acid by polymerization, wherein the phosphorus-free water treatment agent has a limiting viscosity of 0.05 to 0.15 dL/g; and the unsaturated carboxylic acid is one or more selected from the group consisting of acrylic acid, maleic acid, methacrylic acid or itaconic acid. The preparation method for the phosphorus-free water treatment agent comprises the following steps: mixing monomers, an initiator and a molecular weight regulator in a manner of dropwise adding at 50 to 95 DEG C, and after dropwise adding is completed, continuing to carry out a reaction at 75 to 95 DEG C for 1 to 4 h, wherein the monomers are the dimethyldiallylammonium chloride and unsaturated carboxylic acid. The phosphorus-free water treatment agent provided by the invention has good scale and corrosion inhibition effects, and has good flocculation effects on suspended matters in the circulating water at the same time.

The invention discloses a corrosion and scale inhibition control method of a circulating cooling water system and a corrosion and scale inhibitor, and the method comprises the following steps: addinga pH value stabilizing agent, performing adding and monitoring by adopting an automatic pH value adjusting device, and controlling the pH value of the system to be 7.8-9.0; adopting an automatic dosing system for adding the corrosion and scale inhibitor, and controlling corrosion and scaling of the system. The corrosion and scale inhibitor comprises the following components in percentage by weight: 10%-15% of 2-phosphonobutane-1, 2, 4-tricarboxylic acid, 5%-20% of a fluorescent polymer, 0.5%-5% of sodium molybdate, 0.5%-1% of benzotriazole and the balance of water. According to the technology,the pH value of the circulating cooling water can be well stabilized, organic active matter components in the corrosion and scale inhibitor cooperate with molybdate to form a low-molybdenum efficientlow-salt water corrosion and scale inhibitor formula, a polymer containing a fluorescent monomer is used, an online fluorescence detector is used for achieving automatic dosing, stable operation of asystem is guaranteed, and the requirement for the corrosion speed of system pipelines and equipment is met.

The invention relates to a water treatment bactericide and relates to the technical field of water treatment. The water treatment bactericide is prepared from the following components in parts by weight: 10 to 20 parts of isothiazolinone, 1 to 3 parts of copper sulfate, 2 to 10 parts of dodecyl dimethyl benzyl ammonium bromide, 1 to 5 parts of water-soluble sterol oil, 2 to 6 parts of diiodomethylp-methyl phenyl sulfone, 80 to 100 parts of water, 10 to 20 parts of ethanol, 0.05 to 0.1 part of an antifoaming agent and 0.02 to 0.06 part of a stabilizing agent. The water treatment bactericide has the effect of improving the defect of low sterilization rate of a single non-oxidizing bactericide.

The invention belongs to the technical field of scale and corrosion inhibition, and discloses a low-phosphorus scale and corrosion inhibitor, and a preparation method thereof. The low-phosphorus scaleand corrosion inhibitor comprises, by weight, 10-20 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid, 5-12 parts of polyaminopolyether methylene phosphonate, 8-15 parts of polyaspartic acid, 5-12parts of phosphonocarboxylic acid, 8-15 parts of an itaconic acid copolymer, 5-12 parts of a water-soluble zinc salt and 3-7 parts of an acid. The preparation method comprises the following steps: A,slowly adding the acid to water, and then adding the water-soluble zinc salt to obtain an acid solution of the zinc salt; and B, adding the 2-phosphonobutane-1,2,4-tricarboxylic acid, polyaminopolyether methylene phosphonate, polyaspartic acid, phosphonocarboxylic acid and itaconic acid copolymer to the acid solution of the zinc salt at a constant temperature, performing uniform stirring, and cooling the obtained mixture to room temperature in order to obtain the low-phosphorus scale and corrosion inhibitor. The low-phosphorus scale and corrosion inhibitor has the characteristics of good stability, low phosphorus, environmental protection and low cost.

The invention discloses a phosphorus-free descaling corrosion inhibitor and a preparation method. The phosphorus-free descaling corrosion inhibitor is composed of polymaleic anhydride, benzotriazol, zinc nitrate, polyacrylic acid, polyoxy succinate, sodium gluconate and deionized water. According to the invention, calcium phosphate scale can not be easily formed during a usage process of the product, phosphor content in discharge water is far lower than a national standard, and the phosphorus-free descaling corrosion inhibitor belongs to the environment friendly water treatment agent. The phosphorus-free descaling corrosion inhibitor has good corrosion inhibition effect, has obvious corrosion inhibition effect to the ferrous metal, has slight corrosion effect to non ferrous metal such as copper, and zinc salt or chromium salt can be added for improvement. Polymaleic anhydride is nontoxic and biodegradable, and can not generate severe pollution to environment.

The invention discloses a green disinfectant capable of disinfecting the body, and relates to the technical field of disinfectants. The green disinfectant capable of disinfecting the body is prepared from the following raw materials in percentage by mass: 48-56% of potassium hydrogen persulfate, 4.5-5.6% of anhydrous citric acid, 4.3-5.2% of sulfamic acid, 13.5-16.1% of sodium alkyl benzene sulfonate with the mass fraction of 95%, 1.3-1.8% of table salt, 15.4-18.7% of sodium hexametaphosphate, 0-7.2% of a stable complexing agent, 1-2.5% of an anti-caking agent and 0.3-0.8% of lemon flavor, and is prepared by uniformly mixing the raw materials. The green disinfectant capable of disinfecting the body is good in disinfection effect, not easy to cake, capable of being stably stored for a long time, good in water solubility, green and environment-friendly, does not cause corrosion to the environment, has an efficient killing effect on pathogenic microorganisms such as bacteria, viruses, fungi, mycoplasma and the like, and is an environment-friendly disinfectant which is broad in spectrum, efficient, reliable, lasting, safe and environment-friendly.