36results about How to "Good corrosion and scale inhibition effect" patented technology

The invention discloses a composite water treatment agent which comprises the following components in parts by mass: 15-45 parts of sodium tungstate, 5-25 parts of polyaspartic acid, 1-5 parts of zinc salt, 2-15 parts of sodium benzoate and 2-25 parts of carboxylate, wherein sodium tungstate is a corrosion inhibitor which is non-toxic, causes no environmental hazard and can generate the synergic corrosion inhibition function with polyaspartic acid. With addition of other assistants, the composite water treatment agent becomes a green composite water treatment agent which has excellent corrosion inhibition and scale inhibition effects, lower in cost, non-phosphorus, easily biodegradable and beneficial to environmental protection. In China, tungsten reserves and yield are abundant, so that the sufficient tungsten compounds can be provided, and the cost of the treatment agent is greatly lowered.

A corrosion and scale inhibitor used for boiler heating network is characterized in that the inhibitor consists of contents with the following percentage: 5-30 percent of organic Phosophono Butane Tricarboxylicacid and salts, 2-10 percent of acrylic copolymer, 20-30 percent of phosphating poly maleic, 3-10 percent of organic oxygen scavenger, 10-30 percent of alkalinity regulator, and the rest is the deionized water. The inhibitor is a corrosion and scale inhibiting complex formula compound which is applied to both first heating network and secondary heating network.

The invention discloses a corrosion and scale inhibitor composition and an application thereof. The composition includes at least one quinoline derivative, at least one imidazoline derivative and at least one acrylic derivative. The quinoline derivative is selected from quinoline containing an ethylene oxide substituent group. The imidazoline derivative is selected from imidazoline quaternary ammonium salt and bisimidazoline. The invention also discloses an oil field water injection wellbore corrosion and scale prevention method which includes a step of feeding the corrosion and scale inhibitor composition into an oil field water injection wellbore. The corrosion and scale inhibitor composition has excellent corrosion and scale inhibition effect on metal members working under a high-temperature and high-pressure environment (such as the oil field water injection wellbore), and in addition, the corrosion and scale inhibitor composition is free of phosphoric compounds and is free of environment pollution, is environment-friendly, is simple in composition and reduces difficulty of on-site operation.

The invention belongs to the technical field of water treatment of an industrial circulating water cooling system, and particularly discloses an environment-friendly cooling circulating water system composite corrosion-inhibition antisludging agent and a preparation method thereof. The composite corrosion-inhibition antisludging agent consists of a component A, a component B, a component C and water, wherein the component A is polyethylene glycol-polyaspartic acid-polyglutamic acid ternary copolymer, the component B is hydrolytic polymaleic anhydride, and the component C is benzotriazole. The components A, B and C are dissolved in the water according to the ratio to produce a finished product. The corrosion-inhibition antisludging agent is good in corrosion-inhibiting effect on A3 carbon steel, red copper and stainless steel, the antisludging rate is high, the application requirement of the circulating cooling water can be met, and the biodegradability is good.

The invention relates to a high-efficiency corrosion-mitigation scale-inhibition water saving agent used for a boiler, which contains the following components in percentages by weight: 15-20 percent of hydroxyl ethylidene diphosphate, 3-4 percent of sodium hydroxide, 25-35 percent of urotropin, 10-25 percent of benzotriazole and 20-30 percent of sodium silicate. The invention has the advantages ofefficient high-efficiency corrosion-mitigation scale-inhibition effect, water-saving function and minimal corrosion to boiler appliances.

The invention discloses a low-phosphorus high-efficiency corrosion and scale inhibitor and an application thereof in scale inhibition of industrial circulating cooling water. The corrosion and scale inhibitor contains the following effective components in parts by weight: 1-3 parts of an organic phosphonic acid corrosion and scale inhibitor, 3-6 parts of low-phosphorus or phosphorus-free scale inhibitor, 3-8 parts of a sulfonic acid type polymer scale inhibitor, and 1-3 parts of a zinc salt. The corrosion and scale inhibitor has excellent CaCO3 scale resistance, Ca3(PO4)2 scale resistance and corrosion inhibition rate when the industrial circulating water having water quality conditions of Ca<2+> of 120 mg/L, Cl<-> of 60 mg/L and the alkalinity of 110 mg/L is concentrated to 3-6 times, the drug total content is 8-20 ppm, and the phosphorus content is less than 0.5 ppm.

The invention relates to a special corrosion and scale inhibitor for water reuse in a power plant and a preparation method thereof. The special corrosion and scale inhibitor comprises the following components by weight percentage content: 25 to 40% of sulfonic methane amino poly epoxy succinic acid, 20 to 30% of N, N-diacetyl adipic dihydrazide, 12 to 30% of maleic acid-acrylic copolymer, 3 to 5% of graphene oxide aqueous dispersion, 3 to 6% of fatty alcohol-polyoxyethylene ether and 15 to 40% of zinc sulfate aqueous solution. The components of the corrosion and scale inhibitor achieve a synergistic effect, and can realize trace removal of pollutants, after the corrosion and scale inhibitor is compounded, the corrosion and scale inhibition properties are greatly improved, the synergistic effect of physical adsorption and chemical adsorption of the pollutants can be effectively realized, and the special corrosion and scale inhibitor can be used in a wider water pH scope and temperature, and has an excellent sterilizing effect. The production process is simple, three-waste emission is avoided, the stability and water solubility are good, and the main components are biodegradable, free of toxic, phosphorus, pollution and corrosivity, less in adding rate, and environment-friendly.

The invention relates to the field of chemical cleaning and discloses a composite corrosion and scale inhibitor. The composite corrosion and scale inhibitor comprises stearic corrosion inhibiting agents, dispersing agents and scale inhibiting agents, wherein the stearic corrosion inhibiting agents are selected from stearic acid and/or stearate, the dispersing agents comprise copolymers of constitutional units provided by acrylamide, and the scale inhibiting agents are non-phosphorus homopolymers. The invention further discloses application of the composite corrosion and scale inhibitor in circulating cooling water treatment. The composite corrosion and scale inhibitor has the advantages that excellent corrosion and scale inhibiting effects can be obtained in the absence of phosphorous components, and excellent property and environment-friendliness are realized.

The invention relates to a corrosion and scale inhibitor specially used for a circulating water system in an oxygen production plant and a preparation method thereof, wherein the corrosion and scale inhibitor includes following components, by mass, 25-40% of sulfonic acid methylamino polyepoxysuccinic acid, 20-30% of an acrylic acid/methyl acrylate/acrylamide/AMPS co-polymer, 12-30% of a maleic acid/acrylic acid co-polymer, 3-5% of an aqueous dispersed liquid of graphene oxide, 3-6% of fatty alcohol-polyoxyethylene ether and 15-40% of a water solution of BTA. The components of the corrosion and scale inhibitor achieve a synergistic effect so that trace-amount removal of pollutants is achieved. The corrosion and scale inhibitor is greatly enhanced in performances after compounding, can achieve the synergistic effect of physical and chemical adsorption on pollutants, can be used in wide pH range and temperature range, is simple in preparation method, is free of emission of waste gas, waste water and solid waste and is good in stability and water-solubility. The main components are biodegradable so that the corrosion and scale inhibitor is toxic-free, phosphorus-free, pollution-free and corrosion-free, is less in addition amount and is environment-friendly.

The invention relates to a preparation method of a sewage corrosion and scale inhibitor. The raw materials include: reverse osmosis water, ammonium persulfate, an oxidizing agent, phosphorus trichloride, sodium sulfonate, methylbenzotriazole, expanded graphite, disodium hydroxyethylidene diphosphonate, dimethylamine, acrylic acid, acrylamide, zinc chloride, zinc chloride, sodium lignin sulfonate and isopropyl alcohol. The heavy metal ion elution rate is up to 92-99%, the BOD removal rate is 88-92%, the penicillium fermentation broth and streptomyces griseus fermentation broth have a flocculation rate of 88-90%, the calcium carbonate scale inhibition rate is 98-99%, the corrosion rate of carbon steel is 0.0014-0.002mm/a, the COD removal rate is 84-94%, the SS removal rate is 99.7-99.9%, thecalcium carbonate scale inhibition rate is up to 99-99.6%, the strontium sulfate scale inhibition rate is 99.2-99.6%, the carbon steel slow release rate is 89-97%, and the sustained release rate of galvanized material is 93-97%.

The invention relates to a method for inhibiting ammonia nitrogen corrosion of water circular cooling system in cities, which comprises: adding corrosion and scale inhibiting agent into urban recycled water at a concentration of 8 to 48mg/L; and regulating the pH value of the urban recycled water by using an inorganic alkaline matter according to the ammonia nitrogen content in the urban recycledwater, namely regulating the pH value to 7.5 to 8.0 when the ammonia nitrogen content is less than 60mg/L, regulating the pH value to 8.0 to 8.5 when the ammonia nitrogen content is between 60 and 95mg/L and regulating the pH value to 8.5 to 9.5 when the ammonia nitrogen content is between 95 and 150mg/L. In The invention, by adding the composite corrosion and scale inhibiting agent into urban recycled water and keeping the pH value in a proper range, the corrosion and scale of the high-ammonia-nitrogen-content recycled water circular cooling system are reduced to the maximum degree, which isgood for the long-term stable operation of the system. In the invention, the consumption of the composite corrosion and scale inhibiting agent is small, and in the pH value range of the invention, the corrosion and scale inhibiting effect is excellent.

The invention relates to the field of circular cooling water treatment, and discloses a method for treating circulating cooling water. The method comprises the steps that fresh water is adopted as cooling water of an air precooling system, and first agentia is put in the air precooling system; water flowing out of the air precooling system is taken as supplementary water of a circulating cooling water system, and second agentia is put in the supplementary water of the circulating cooling water system; the sum of calcium ion concentration and total alkalinity of the fresh water is less than orequal to 100 mg/L; the first agentia comprises a copolymer of crylic acid and 2-methyl-2'-acrylamide propane sulfonic acid, zinc salt and organic phosphonic acid. According to the method, by changingthe water supplementing point of the fresh water and reasonably adding the scale and corrosion inhibition components, the scaling and corrosion problems of the air precooling system and the circulating cooling water system are solved, the adding amount of the agentia is lower, and the method is especially beneficial for reducing production cost.

The invention discloses a natural balance ultrahigh concentration multiple and zero emission control method for a circulating water system. The method comprises the steps that at the initial stage of operation, efficient scale and corrosion inhibition functional chemicals are continuously added into a circulating cooling water pond, the concentration of the efficient scale and corrosion inhibition functional chemicals is maintained to be 100-200 mg/L, after circulation is conducted for 20-30 days, the concentration is controlled to be maintained to be 50-100 mg/L, the chemicals are circulated along with circulating water to reach a heat exchanger, and part of water returns to the circulating cooling water pond after being filtered; when the sum of the calcium hardness and the total alkalinity in the circulating water exceeds 1200 mg/L, high-efficiency micro-foam evaporation pre-precipitation functional chemicals are added into the circulating cooling water tank, the adding concentration is 10-100 mg/L, and micro-foam evaporation pre-precipitation softening treatment is carried out; when the turbidity of the circulating water is greater than or equal to (4-10) NTU or the total iron is greater than or equal to (0.5-1) mg/L, adding an enhanced filtration functional chemical with the adding concentration of 0.5-10 mg/L into a circulating cooling water tank, performing enhanced filtration, directly recycling filtered water to a circulating water system, discharging dirt along with backwashing water, performing water-slag separation on the backwashing water, returning the separated water to the circulating water system, and discharging separated filter residues.

The invention discloses a quinoline deviate as shown in a formula I in the specification, wherein R1 in the formula I is hydrogen or alkyl; A is -(CH2CH2O)n-CH2CH3, and n is an integer more than 1. The invention further provides a preparation method of the quinoline deviate, application of the quinoline deviate as a corrosion and scale inhibitor, as well as a composition containing the quinoline deviate. The quinoline deviate under a relatively low use amount shows outstanding corrosion and scale inhibition performance for a high-salinity and high-chlorine oilfield reinjection water system, and has an outstanding corrosion and scale inhibition effect on a water injection shaft under high temperature and high pressure conditions.

The invention discloses a method for preparing a corrosion and scale inhibition adsorbent by taking lignin in papermaking wastewater as a raw material, wherein the method comprises the following steps: (1) taking alkaline papermaking black liquor, adding a coagulant aid, adding an acid to adjust the pH value, controlling the temperature at 60-70 DEG C, flocculating and layering the waste liquor, filtering, drying, and grinding to obtain lignin; (2) putting the prepared lignin into a beaker, adding Na2SO3 and formaldehyde, then adding NaOH, putting the beaker into a reactor, carrying out a reaction, and after the reaction is finished, cooling and centrifuging to obtain sodium lignin sulfonate; and (3) taking the prepared sodium lignin sulfonate, sequentially adding H2O, organic phosphorus and zinc chloride into the prepared sodium lignin sulfonate, adding an ethanol solution of benzotriazole, putting the mixed solution into the reactor, carrying out a reaction, and cooling to obtain thecorrosion and scale inhibition adsorbent. The prepared corrosion and scale inhibition adsorbent is applied to industrial wastewater containing a large number of metal ions and corrosive substances, can play a role in corrosion and scale inhibition adsorption, protects pipelines and equipment, and adsorbs various metal ions.

The invention discloses a method for preparing a phosphorus-free water treatment corrosion inhibitor from waste oil as a raw material and the phosphorus-free water treatment corrosion inhibitor prepared by the method, and belongs to the waste utilizing processing technology. The waste oil is rich in source, and the method comprises the following steps: firstly, performing reaction on the waste oil and an alcohol amine compound to obtain an intermediate product A; secondly, adding epichlorohydrin to synthesize cyclic ether to obtain an intermediate product B; finally, adding polyethylene glycol and reacting to produce the phosphorus-free water treatment corrosion inhibitor. The phosphorus-free water treatment corrosion inhibitor prepared by the method has the characteristics of high corrosion inhibition rate and small using amount of chemicals. After the phosphorus-free water treatment corrosion inhibitor is compounded with a polycarboxylic scale-inhibiting dispersant for use, the phosphorus-free water treatment corrosion inhibitor can be used as a phosphorus-free scale-inhibiting corrosion inhibitor; after the phosphorus-free water treatment corrosion inhibitor is compounded with alkali, a reducing agent and the like for use, the phosphorus-free water treatment corrosion inhibitor can replace sodium nitrite and be used as a corrosion inhibitor for a closed water system. By the method, the waste oil can be used as the main raw material, so that the waste is turned into a treasure; a new way of disposing and utilizing the waste oil is provided.