52results about How to "Corrosion-inhibiting" patented technology

The invention relates to a hydrophobic association polymer with various loop-structure side chains and a preparation method and application thereof. The method comprises the steps such as preparing a monomer mixture solution, and synthesizing and purifying a hydrophobic association polymer; the hydrophobic association polymer of the invention has microbial degradation preventive performance and corrosion inhibiting performance, is temperature-tolerant and salt-tolerant and is also environment-friendly. Therefore, the hydrophobic association polymer has a promising application prospect in intensive oil exploitation.

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 provides an oilfield water injection corrosion inhibitor, the components comprising: 30-80% Mannich base quaternized ammonium derivatives, 10-60% solvent, 0-10% acetylenic alcohol, 0-10% by weight percentage 10% alkali metal iodide, 0-5% OP-10, 0-20% urotropine; and further provides a preparation method of the above oilfield water injection corrosion inhibitor. The invention has simple process, selects low-toxicity and easy-to-obtain synthetic raw materials, and is easy to realize industrialized production. The raw materials used in the invention have corrosion inhibition performance, and the corrosion inhibition effect is obvious after being further prepared as a corrosion inhibitor, without separation and purification, easy to use, and a small dosage has a good corrosion inhibition effect. Adding 100mg/L of the corrosion inhibitor of the present invention in the oil field water injection system can significantly reduce the corrosion rate of N80 steel, and adding 30mg/L of the corrosion inhibitor of the present invention can meet the oil and gas industry standard SY/T 5329-2012 " The recommended standard (<0.076mm/a) in "Recommended Indicators and Analysis Methods for Injection Water Quality in Clastic Reservoirs".

The invention relates to an efficient compound corrosion inhibitor for hydraulic support hydraulic fluid and application of the efficient compound corrosion inhibitor and belongs to the technical field of transmission media for coal mining equipment. The efficient compound corrosion inhibitor is prepared by triethanolamine, ethanolamine, sebacic acid, octanoic acid, boric acid, benzotrizaole and the like under certain temperature and normal pressure. Compared with existing products, the efficient compound corrosion inhibitor has the advantages that the inhibitor is efficient and evident in corrosion inhibiting performance, has a corrosion inhibiting effect on various metal, is good in stability in the hydraulic support hydraulic fluid and has long-term effectiveness.

The invention provides a high-stability 84 disinfectant with a corrosion inhibition effect. The high-stability 84 disinfectant comprises the following components in parts by weight: 5-50% of a sodium hypochlorite solution, 0.5-5% of an acid-base regulator, 1-10% of a stabilizer, 5-20% of a corrosion inhibitor and 0.1-2% of a complexing agent, with the balance being water. According to the invention, the disinfectant has certain corrosion inhibition, overcomes the problem of high corrosivity of the disinfectant, is further improved in stability and disinfection and sterilization capability , and can quickly kill various common bacteria and viruses; and the disinfectant of the invention overcomes the problem that the corrosion inhibition property, the stability and the bactericidal property of an existing sodium hypochlorite disinfectant cannot be achieved at the same time.

The invention discloses O-acetamide chitosan Schiff-base and a preparation method thereof. The preparation method includes: benzaldehyde chitosan Schiff-base is allowed to have nucleophilic substitution reaction with chloroacetamide so as to prepare the O-acetamide chitosan Schiff-base. The O-acetamide chitosan Schiff-base has the advantages that the O-acetamide chitosan Schiff-base is definite in modification position, high in purity and good in flocculation and sterilizing effect, and chitosan amino protection is achieved through the Schiff-base reaction to allow hydroxyl to have a fixed-position modification effect.

The invention provides an aviation engine carbon deposit cleaning agent and a preparation method thereof. The aviation engine carbon deposit cleaning agent comprises the following components in parts by weight: 10-25 parts of alcohol ether solvent, 5-10 parts of closed dodecylbenzene sulfonic acid, 2-8 parts of a sophorolipid biosurfactant, 2-5 parts of alkenyl succinic anhydride, 2-5 parts of a complexing agent, 2-5 parts of a ternary polycarboxylic acid composition, 1-3 parts of a compound corrosion inhibitor, 1-10 parts of an alkalinity improver, 0.1-1.0 part of a defoaming agent and 50-70 parts of water. The aviation engine carbon deposit cleaning agent is suitable for various assemblies made of different materials in an engine, can protect all the assemblies of the engine from being corroded, oxidized and discolored, meanwhile, removes carbon deposit and dirt on all the assemblies of the engine thoroughly, and guarantees a good cleaning effect.

The invention discloses a rare-earth salt and zeolite doped silane composite film and preparation and application methods thereof. The preparation method includes: preparing rare-earth salt and zeolite particle doped silane mixed liquid, aging, impregnating the surface of a metal material with the mixed liquid or spraying the mixed liquid to the surface of the metal material, and curing to form acompact and corrosion-resistant silane composite film on the surface of the aluminum alloy. The preparation method has the advantages that the porous zeolite particles are used to load the rare-earthsalt which can inhibit corrosion and has a self-repairing effect, the crosslinking density of the silane film is enhanced by the zeolite particles, the physical barrier effect of the silane film on corrosive media is enhanced effectively, and the corrosion resistance of the silane film on the surface of metal is increased; the compactness of the rare-earth salt and zeolite doped silane composite film on the surface of the metal is increased greatly, the composite film can effectively block the penetration of external corrosive substances, the combining strength of high-polymer coating and themetal can be increased, the corrosion resistance of the metal is effectively enhanced, and the corrosion-resistant service requirements of the metal material under harsh environment conditions can besatisfied.

The invention provides a retarding acidification system. The retarding acidification system comprises a retarding admixture, wherein the retarding admixture is synthesized through a Mannich reaction of polyethylene polyamine, formaldehyde and phosphorous acid. A multi-hydrogen acid retarding acidification system is adopted, and the molecular structure of the retarding acidification system comprises multiple phosphate groups which can provide multiple H<+>. Compared with other acidic solutions, the retarding acidification system has more excellent performance including more excellent retarding performance, longer penetration distance, lower clay corrosion rate, higher quartz corrosion rate and capability of inhibiting secondary precipitation and has the advantages of being good in corrosion inhibition and chelating property, low in viscosity and the like. The retarding acidification system further has better corrosion capability when acid liquor reaches the deep stratum, and further, the acidification effect of the high-retardancy acidification system is improved.

The invention discloses a benzisothiazolinone isoxazole acetamide derivative, a synthesis method and application thereof. The preparation method includes: reacting benzisothiazolinone acetic acid with3-substituted phenyl-5-aminoisoxazole in a mole ratio of 1:(1-1.5), performing dissolution with an organic solvent, adding HOBT(1-hydroxybenzotriazole) and EDCI[1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride as the condensing agent, with the HOBT(1-hydroxybenzotriazole), EDCI[1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and 3-substituted phenyl-5-aminoisoxazole being in a mole ratio of (1-1.3):(1-1.5):1, and carrying out reaction at 10-30DEG C for 16-40h. The benzisothiazolinone isoxazole acetamide derivative has good inhibitory activity on seawater heterotrophic bacteria, and can achieve a highest inhibition rate up to 100%. The inhibitory effect on China chlorella and mussel is higher than that of 20% benzisothiazolinone-3-one (BIT) bactericide on the market,and the corrosion inhibition effect on carbon steel can reach 43.1%.

The invention discloses a preparation method of a water treatment agent, namely a chitosan copolymer applicable to municipal wastewater. The preparation method comprises the following steps that firstly, chitosan reacts with benzaldehyde to generate chitosan-benzaldehyde Schiff base used for protecting amino groups on chitosan molecules; then the chitosan-benzaldehyde Schiff base reacts with acrylic acid to generate O-carboxyethyl-benzaldehyde chitosan Schiff base; the O-carboxyethyl-benzaldehyde chitosan Schiff base is acidified with hydrochloric acid to remove a formaldehyde protecting group and then reacts with polysuccinimide to generate a chitosan-acrylic acid-aspartic acid copolymer; and the chitosan-acrylic acid-aspartic acid copolymer is purified, filtered and dried to obtain a brown yellow solid. The chitosan copolymer is applicable to municipal wastewater and has excellent scale and corrosion inhibition performance.

The invention relates to chemical fracturing fluid for hot dry rock, which is prepared by mixing fluoboric acid, polyamino polyether methylene phosphonate and aluminum chloride hexahydrate. After the prepared chemical fracturing fluid is injected into a thermal reservoir of the hot dry rock, fluoboric acid is hydrolyzed to generate HF (hydrogen fluoride) gradually, the reaction speed with a stratum is lower, and deep penetration can be achieved. Polyamino polyether methylene phosphonate as polyatomic acid, can be decomposed into hydrogen ions at multiple stages, acts on the stratum for a long time, extends a penetration distance of chemical fracturing, further achieves a deep thermal reservoir transformation effect and has performance such as low speed, low damages, scale prevention and corrosion inhibition; simultaneously, phosphonate of polyamino polyether methylene phosphonate has significant absorption and water-dampness characteristics which can catalyze reaction between hydrofluoric acid and quartz and allow the corrosion speed of the quartz to be increased with time; and the improvement on the radial deep penetrability of the reservoir is facilitated.

The invention relates to the field of circulating cooling water treatment, and discloses a phosphorus-free composite anti-scaling corrosion inhibitor and application thereof and a treatment method ofcirculating cooling water. The phosphorus-free composite anti-scaling corrosion inhibitor contains carboxymethyl inulin sodium, a cyclodextrin derivative and a copolymer. The copolymer comprises a structural unit provided by a thiourea derivative represented by the formula (I), a structural unit provided by a C3-C10 unsaturated carboxylic acid and a structural unit provided by C4 to C10 acrylate.The application is the application of the phosphorus-free composite anti-scaling corrosion inhibitor in treatment of the circulating cooling water; the treatment method of the circulating cooling water includes addition of the phosphorus-free composite anti-scaling corrosion inhibitor into the circulating cooling water. The phosphorus-free composite anti-scaling corrosion inhibitor exhibits good comprehensive performance of scale inhibition and corrosion inhibition, and when applied to the circulating cooling water, can not only meet the requirements of the circulating cooling water for scaleinhibition and corrosion inhibition, but also can avoid the environmental problems caused by phosphorus-containing agents in the prior art.

The invention discloses cationic N-substituted aniline ionic liquid, polyionic liquid and a preparation method and application thereof. The polyionic liquid has a structure shown as a formula (II) or a formula (III). The polyionic liquid with the structure as shown in the formula (II) is prepared by homopolymerizing cationic N-substituted aniline ionic liquid, and the polyionic liquid with the structure as shown in the formula (III) is prepared by copolymerizing cationic N-substituted aniline ionic liquid and aniline. The cationic N-substituted aniline polyionic liquid provided by the invention can be used as a corrosion inhibitor to slow down corrosion of an acidic medium to materials such as metal.

The invention relates to a surface cleaning method and a cleaning device of sheet metal. The method comprises the steps of cleaning and removing oil from the sheet metal, performing mechanical derusting treatment, immersing the sheet metal in surface treatment liquid, heating to 80-90 DEG C, treating the sheet metal for 30-40min, flushing the sheet metal for 0.5-1min with deionized water, neutralizing the flushed sheet metal immediately, immersing the sheet metal in a 0.5% sodium carbonate aqueous solution for 5min, performing passivating treatment, immersing the sheet metal in purified liquid, heating to 80-90 DEG C for 5-10min, flushing the sheet metal with the deionized water, wiping up the surface of the sheet metal, and then performing oil seal treatment. At the same time, the invention further discloses the cleaning device for the mechanical derusting treatment of the surface of the sheet metal. Rusty spots on the surface of the sheet metal can be effectively removed by the cleaning method; micro scratches generated by the mechanical derusting treatment are treated; and at the same time, the method has no influence on the size, shape, surface roughness, luster and the like ofthe sheet metal.

The invention relates to a double-effect organic macromolecular compound and a preparation method thereof. The preparation method includes: adding Mannich base, deionized water, an initiator and a chelating agent into a reaction container, and introducing N2 to expel oxygen, then adding p-acrylamide sodium benzoate, carrying out condensation reflux reaction at 50DEG C-80 DEG C for 4h-8h, and conducting reduced pressure distillation to remove solvent water, thus obtaining light red polymer powder, i.e. the double-effect organic macromolecular compound. According to the invention, two monomers are prepared through Mannich reaction and acyl chloride aminolysis reaction, and then a double-effect organic macromolecule is prepared by means of aqueous solution free radical polymerization, wherein N and O heteroatoms contained in the molecular structure of the monomer Mannich base can combine with Fe atoms on the metal surface to cover an equipment surface in the form of an adsorption film, thus reaching a corrosion inhibiting effect. At the same time, the Mannich base molecular structure contains polar groups capable of adsorbing suspended matters and the like in wastewater, thus having certain flocculation effect. The method provided by the invention has the advantages of simple and mild synthesis condition, small dosage, and good corrosion inhibition and oil removing effects, etc.

The invention relates to a cleaning agent for windshield glass, which is characterized by being prepared by mixing the following raw materials in parts by weight: 0.1-1.0 part of alkyl polyglucoside (C8-C10), 0.01-0.6 part of monoester sodium salt of lauryl alcohol polyoxyethylene phthalic acid, 1.0-5.0 parts of propylene glycol monomethyl ether, 0.01-0.3 part of polyvinylpyrrolidone K-15, 0.01-0.1 part of 2-phosphono butane-1,2,4-tricarboxylic acid, 1.0-5.0 parts of 1,3-propylene glycol, 10.0-60.0 parts of ethanol and 40.0-90.0 parts of deionized water. The product has good cleaning and decontaminating performances and vehicle erosion preventing advantage and effect.

The invention discloses a bi(1-chlorine-N-hydroxyethyl morpholinium-3-hydroxy propyl group)n-octadecylamine quaternary ammonium salt and a preparation method thereof. The method comprises the following steps: octadecylamine and absolute ethyl alcohol are added in a 3-mouth flask, continuously stirred, heated, and chloropropylene oxide is added, and the materials are fully reacted to obtain an intermediate bi(1-chlorine-2-hydroxy propyl group) n-octadecylamine, the above intermediate, N-hydroxyethyl morpholine and absolute ethyl alcohol are added in another flask, are subjected to a full backflow reaction to obtain a bi(1-chlorine-N-hydroxyethyl morpholinium-3-hydroxy propyl group)n-octadecylamine quaternary ammonium salt compound. The compound has sterilization performance and corrosion inhibition performance, and the preparation method has the advantages of simple operation, optimization of the reaction conditions, simplification of reaction post-processing, and low cost.

The invention discloses a phosphorus-free composite scale and corrosion inhibitor and application thereof, and a treating method for circulating cooling water, belonging to the field of treatment of circulating cooling water. The phosphorus-free composite scale and corrosion inhibitor contains sodium carboxymethyl inulin, a cyclodextrin derivative and a copolymer, wherein the copolymer contains a constitutional unit provided by a thiourea derivative as shown in a formula (I), a constitutional unit provided by C3-10 unsaturated carboxylic acid and a constitutional unit provided by C2-10 unsaturated sulfonic acid. The invention also provides application of the phosphorus-free composite scale and corrosion inhibitor to treatment of circulating cooling water. The treating method for circulating cooling water comprises a step of adding the phosphorus-free composite scale and corrosion inhibitor into circulating cooling water. The phosphorus-free composite scale and corrosion inhibitor provided by the invention presents good comprehensive scale and corrosion inhibition performance; and when the phosphorus-free composite scale and corrosion inhibitor is applied to treatment of circulating cooling water, requirements of circulating cooling water on scale inhibition and corrosion mitigation are met, and environmental problems caused by conventional phosphorus-containing reagents can be avoided.

The invention discloses a boiler pH regulator and application thereof. The boiler pH regulator comprises the following raw materials in percentage by mass: 5-15% of triethanolamine, 10-15% of octadecylamine, 10-25% of cyclohexylamine, 15-25% of diethylenetriamine and the balance of deionized water. The boiler pH regulator disclosed by the invention has the advantages of being small in usage amount, low in product volatility, simple in operation, less in harm to human bodies and excellent in heat stability, does not have obvious attenuation after thermal deaeration and has a certain corrosion inhibition performance, and the corrosion rate of a boiler system can be reduced, so that deposition of metallic corrosion products in the boiler is reduced, and boiler interior cleaning is facilitated. The boiler pH regulator disclosed by the invention can be applied to refinery enterprise boiler systems, power plants, chemical plants, caustic soda, papermaking and pharmacy.