Patents
Literature
Patsnap Eureka AI that helps you search prior art, draft patents, and assess FTO risks, powered by patent and scientific literature data.

24 results about "Hydroxysultaine" patented technology

Hydroxysultaines are chemical compounds used in high-foaming shampoos, bath products and shower gels especially in conjunction with ether sulfates and alkyl sulfates. They are also used in industrial applications where high, stable foam is required. Chemically, hydroxysultaines are zwitterionic, typically containing covalently linked positive and negative ions.

High-foaming self-thickening amino acid cleaning composition and preparation method thereof

The invention provides a high-foaming self-thickening amino acid cleaning composition and a preparation method thereof, and relates to the technical field of cosmetics. The high-foaming self-thickening type amino acid cleaning composition is prepared from the following raw materials in percentage by mass: main surfactants: 15%-20% of potassium cocoyl glycinate, 0.5%-2.0% of sodium cocoyl amino propionate and 0.05%-2% of sodium lauroyl glutamate; the auxiliary surfactant comprises the following components in percentage by weight: 1.2%-1.8% of sodium lauroamphoacetate, 1.8%-3.6% of lauryl hydroxyl sulfobetaine, 0.5%-1.5% of sodium methyl cocoyl taurate and 0.5%-1.5% of lauryl glucoside; and 0.5%-1.8% of an acrylic ester copolymer. The cleaning composition is free of fatty acid components, small in irritation, rich and dense in foam, good in foam performance, high in cleaning power, good in flushing performance, free of false slip after flushing and good in stability.
Owner:SHANDONG HUAWUTANG BIOLOGICAL TECHNOLOGY CO LTD

Self-emulsifying nano-composite modifying and flooding agent for oil field and preparation process of self-emulsifying nano-composite modifying and flooding agent

The invention relates to the technical field of chemical oil displacement, and particularly discloses a self-emulsifying nano-composite modifying and flooding agent for an oil field and a preparation process of the self-emulsifying nano-composite modifying and flooding agent. The invention relates to a self-emulsifying nano composite modifying and flooding agent for an oil field. The self-emulsifying nano composite modifying and flooding agent is prepared from the following 100 parts by mass of raw materials: 3-5 parts of amphiphilic nano silicon dioxide, 1-2 parts of a zwitterionic surfactant, 0.5-1 part of a nonionic surfactant and the balance of water, the zwitterionic surfactant comprises hydroxyl sulfobetaine and imidazoline, and the zwitterionic surfactant comprises hydroxyl sulfobetaine and imidazoline; and the non-ionic surface active agent is an ethyoxyl-propoxyl block copolymer. The self-emulsifying nano-composite modifying and flooding agent prepared by the invention effectively realizes the balance of low interfacial tension and self-emulsifying efficiency.
Owner:西安天正石油技术有限公司

Foam type purification disinfectant and disinfection method

The foam type purification disinfectant is prepared from the following components in percentage by mass: 0.15 to 0.2 percent of benzalkonium chloride, 10 to 15 percent of a foaming agent, 0.6 to 1.5 percent of alkyl glycoside, 2 to 4 percent of polyvinyl alcohol, 0.7 to 1 percent of nano bentonite and the balance of water, wherein the foaming agent is prepared from short-chain alkyl hydroxyl sulphobetaine with the carbon number of 8 to 12 and long-chain alkyl hydroxyl sulphobetaine with the carbon number of 20 to 24. The components in the foam type purification disinfectant cooperate with one another, so that the foam type purification disinfectant has excellent sterilization and disinfection effects and cleaning effects, and is good in freezing resistance, high in practicability, convenient and rapid.
Owner:JIANGSU KANGBAT BIOLOGICAL ENG CO LTD +1

An oil-purifying facial cleansing mud and its preparation method

This invention provides an oil-purifying cleansing mud and its preparation method. The cleansing mud, by weight, comprises 1-5 parts of a viscosity modifier, 0.01-0.1 parts of a chelating agent, 10-20 parts of a moisturizer, 15-25 parts of a surfactant, 0.1-1 parts of a thickener, 0.1-5 parts of a cleanser, 0.1-2 parts of an antioxidant, 0.1-1 parts of a fragrance, and 50-75 parts of water. The surfactant is a combination of sodium cocoyl glycinate, lauryl hydroxysulfonate betaine, cocoyl glutamic acid, decyl glucoside, potassium cocoyl glycinate, and cetearyl alcohol polyether-25. This oil-purifying cleansing mud, through the use of surfactants, cleansers, and moisturizers, gently cleanses pores, absorbs oil and dirt, and simultaneously soothes the skin, preventing dryness and tightness. The synergistic combination of these components achieves a balance between cleansing, oil removal, and gentleness, precisely regulating the skin's balance and thus enhancing the consumer experience.
Owner:SHENZHEN XINGKUO BIOTECHNOLOGY CO LTD

Well treatment compositions and methods of making and using same

Disclosed herein are well treatment compositions and methods. In a specific embodiment, a well treatment compositions includes a surfactant composition that includes: one or more surfactants, where the one or more surfactants includes: sodium alpha olefin sulfonate, cocamidopropyl hydroxysultaine, and mixtures thereof, where the one or more surfactants are present, and where the surfactant composition has a content of the one or more surfactants from about 0.1% / wt. to about 50.0% / wt.; and one or more carrier media, where the one or more carrier media are present, and where the surfactant composition has a content of the one or more carrier media from about 50.0% / wt. to about 99.9% / wt., where the surfactant composition as a hydrophilic-lipophilic balance of about 11.0 to about 14.0; and where the surfactant composition has a surface tension from about 25 dynes / centimeter to about 35 dynes / centimeter.
Owner:NIGHTHAWK COMPLETION SERVICES LLC

Hydroxysulfobetaine gemini surfactant and synthesis method thereof

The invention discloses a hydroxy sulfobetaine gemini surfactant, which is simply recorded as DTH-n, the synthesis method comprises the following steps: (1) adding N, N-dimethylethylenediamine and alkyl bromide (carbon chain lengths are respectively 10, 12, 14 and 16) into a reaction container, carrying out reflux stirring at 70 DEG C for 16-20 hours by taking absolute ethyl alcohol as a solvent and KOH as an alkaline agent, carrying out suction filtration, carrying out rotary evaporation on filtrate to remove the solvent, dissolving a product into n-hexane, adding concentrated hydrochloric acid, stirring to separate out a white solid, carrying out suction filtration to obtain a solid gemini alkyl tertiary amine acidified substance, and drying the solid gemini alkyl tertiary amine acidified substance; dissolving the solid acidified substance in absolute ethyl alcohol, carrying out liquid separation, taking a lower-layer solution, and adding solid KOH to reduce the gemini alkyl tertiary amine acidified substance into an intermediate product gemini alkyl tertiary amine under the protection condition of normal hexane; and (2) adding the product, 3-chloro-2-hydroxypropane sodium sulfonate and an isopropanol aqueous solution as a solvent and sodium carbonate as an alkaline agent into a reaction container to maintain the pH value of the reaction solution at 8-10, carrying out reflux reaction at 90 DEG C for 48 hours, separating liquid, taking a lower-layer solution, evaporating in a vacuum oven to remove the solvent, dissolving residues in a 70% ethanol solution, carrying out suction filtration, standing the filtrate at 0 DEG C for 12 hours, separating out a viscous oil substance, and drying to obtain the product. Separating liquid, re-precipitating and purifying, evaporating in a vacuum oven to remove the solvent, and grinding to obtain a faint yellow powdery solid. According to the invention, a two-step method is adopted, the reaction steps are few, the operation is simple, the product is easy to separate and purify, and the surface activity and foam performance are excellent.
Owner:XINJIANG UNIVERSITY

Cleansing composition

An aqueous, sulphate free shampoo composition for hair and scalp comprising:—a. a pre-formed emulsified silicone; b. a cationic deposition polymer; c. a hair substantive cationic conditioning polymer which is an APTAC polymer having a molecular weight of less than 1 million Daltons, preferably selected from a homopolymer of (3-acrylamidopropyl) trimethyl ammonium chloride and a (3-acrylamidopropyl) trimethyl ammonium chloride / acrylamide copolymer; d. a total amount of anionic surfactant, amphoteric surfactant and zwitterionic surfactant consisting of: (i) from 3 wt % to 13 wt %, by weight of the total composition at 100% activity, of an alpha olefin sulfonate anionic surfactant of general formula (I): R1—CH═CH—CH2—SO3−M+(I) in which R1 is selected from linear or branched alkyl groups having from 11 to 13 carbon atoms and mixtures thereof; and M is a solubilizing cation; (ii) from 1 to 6%, by weight of an amphoteric or zwitterionic surfactant, selected from an alkyl betaine of general formula (II) R2—N+(CH3)2—CH2—COO−M+(II) wherein R2=C12 (Lauryl) or Coco derived; an alkyl hydroxy sultaine of general formula (III), R3—N+(CH3)2—CH2—CH(OH)—CH2—SO3M+(III) wherein R3=C12 (Lauryl) or Coco derived; an alkyl aminopropyl hydroxy sultaine of general formula (IV), R4—CO—NH—(CH2)3—N+(CH3)2—CH2—CH(OH)—CH2—SO3−M+(IV) wherein R4=C12 (Lauryl) or Coco derived; an alkyl amphoacetate of general formula (V), R5—CO—NH—(CH2)2—N(CH2—CH2—OH)(CH2—COO−M+) (V) wherein R5=C12 (Lauryl) or Coco derived; and mixtures thereof; and e. a suspending agent in which the weight ratio of (i) to (ii) ranges from 1:1 to 6:1 and the pH of the composition is from 3 to 6.5; and wherein the composition has a viscosity from 3,500 to 15,000 mPa·s, preferably from 4,000 to 12,000 mPa·s when measured using a Brookfield V2 viscometer using a spindle RTV5, for 1 minute at 20 rpm at 30° C. results in superior deposition and retention of silicone on hair.
Owner:CONOPCO INC

Mitigating iron sulfide in gas wells

A method may include introducing a metal sulfide mitigation package comprising a hydroxysultaine dispersing agent, a water-wetting surfactant, and a corrosion inhibitor into a wellbore; contacting a metal sulfide scale in the wellbore with the metal sulfide mitigation package; and dissolving at least a portion of the metal sulfide scale with the metal sulfide mitigation package.
Owner:HALLIBURTON ENERGY SERVICES INC

Hard water-resistant facial cleansing composition and use thereof in cosmetics

PCT designated stageWO2026153366A9Hydroxamic acidDiethylenetriamine
A hard water-resistant facial cleansing composition and use thereof in cosmetics. The hard water-resistant facial cleansing composition comprises 0.8-5 parts by weight of lauryl hydroxysultaine, 0.1-0.7 parts by weight of sodium diethylenetriamine pentamethylene phosphonate, 0.045-0.3 parts by weight of sodium glucoheptonate, 0.08-1 part by weight of a skin conditioner A, and 0.01-0.5 parts by weight of a skin conditioner B. The skin conditioner A consists of 1,3-propanediol, 1,2-hexanediol, and octanoyl hydroxamic acid, and the skin conditioner B consists of glycerin and a leaf / stem extract of Stevia rebaudiana. The prepared hard water-resistant facial cleansing composition enhances the hard water resistance, reducing the influence of ions on the skin, and making up for the significant disadvantages of poor cleansing feel and ineffective cleansing in hard water of commercial facial cleansing products. The prepared hard water-resistant facial cleansing composition can be applied to most facial cleansing systems, and is widely used in the fields of skin care products, cosmetics, etc.
Owner:HUNAN YUJIA COSMETICS MFG CO LTD

Amino acid shampoo based on self-suspension system and preparation method thereof

PendingCN121622489ACosmetic preparationsHair cosmeticsActive agentHydroxysultaine
The invention relates to amino acid shampoo based on a self-suspension system and a preparation method of the amino acid shampoo, and belongs to the technical field of cosmetics. Through construction of a micelle system between an amino acid surfactant and an ampholytic surfactant, when methyl cocoyl sodium taurate / lauryl hydroxy sulfobetaine (SCMT / LHSB) is compounded and self-assembled to form the micelle system, the compounding proportion between the surfactants has great influence on the formed micelle structure, and when the ratio of SCMT / LHSB reaches 10.50: 6.00-10.50: 7.50, the formed micelle structure is not influenced by the compounding proportion between the surfactants. The SCMT and the LHSB play a good synergistic effect, so that the pearlescent pigment has a certain suspension characteristic, and the high-temperature stability of pearlescent components can be well maintained. When the pH value of the system reaches 6.60-7.00, the pearly luster is stable, and the luster is bright. The shampoo disclosed by the invention is more excellent in the aspects of foaming performance, cleaning power and dry-wet combing property.
Owner:SUZHOU LUYE COMMODITY CO LTD

Ocular composition and kits thereof

PendingUS20260115117A1Cosmetic preparationsToilet preparationsSodium acetateCaprylyl Glycol
An ocular composition consisting of purified water, PEG-80 sorbitan laurate, sodium trideceth sulfate, PEG-150 distearate, sodium lauroamphoacetate, cocamidopropyl hydroxysultaine, sodium chloride, PEG-15 cocopolyamine, polyhexamethylene biguanide, 1,2 hexanediol, and caprylyl glycol. The composition can be applied to a fabric pad for use as an eyelid cleanser, where the fabric pad is pre-moistened with the composition and packaged for use. The composition may also be used in an eyelid treatment kit for convenient combination treatments to improve overall eyelid hygiene and adjunctive eyelid therapy.
Owner:OCUSOFT INC

An acid pickling accelerator for use in an acid regeneration system and a method of preparing the same

The application discloses an acid pickling accelerator suitable for an acid regeneration system and a preparation method. The preparation raw materials include, in percentage by weight, 6-17% of a penetrating agent, 1-5% of a stripping agent, 5-10% of a dispersing agent, 1-5% of a stabilizing agent, 1-3% of a foam control agent and water supplementing to 100%. The application uses lauryl hydroxyethyl imidazoline as the penetrating agent and lauryl hydroxyl sulfobetaine as the stripping agent, accelerates the penetration of the acid liquid to the metal oxide skin, improves the sheet white degree, reduces the color difference and reduces the generation of silicon mud. After the silicon steel is pickled, the obtained regenerated acid has high purity, improves the quality of the byproduct iron oxide powder of the acid regeneration system and improves the economy of resource recovery.
Owner:TAISHAN KEMEI CHEM IND CO LTD

Tea flower active component scalp micro-ecological balance regulator and preparation method thereof

The invention provides a tea flower active ingredient scalp micro-ecological balance regulator and a preparation method thereof. The shampoo comprises water, sodium methyl cocoyl taurate, cocamidopropyl hydroxy sulfobetaine, octyl / decyl glucoside, sodium chloride, glycerol, phenoxyethanol, essence, PPG-3 octyl ether, cocoyl glutamic acid, sodium lauroamphoacetate, piroctone olamine salt, PEG-150 distearate, frankincense oil, panthenol, guar gum hydroxypropyl trimethyl ammonium chloride and a camellia extract. The preservative is prepared from citric acid, EDTA (Ethylene Diamine Tetraacetic Acid) disodium, benzoic acid, butanediol, tetrasodium glutamate diacetate, glycerol caprylate, dehydroacetic acid, sodium dehydroacetate, guava fruit extract and sodium surfactin. The preparation method comprises the following steps: uniformly mixing part of the components to obtain a mixed solution A, adding the camellia extract and other components, uniformly stirring to obtain a mixed solution B, and finally adding the essence, and uniformly stirring to obtain the regulator. The scalp micro-ecological balance can be adjusted, and the scalp environment can be improved.
Owner:HUANGSHAN MAKE SOME CONTRIBUTION INFORMATION TECHNOLOGY CO LTD

Detergent composition

The present invention relates to a detergent composition comprising: (a) 1 to 40 weight percent of a secondary alkyl sulfonate surfactant having an average of 15 to 18 carbon atoms in the linear alkane chain; (b) 1 to 40 weight percent of a nonionic surfactant; and (c) 0.01 to 8 weight percent of an alkyl hydroxysultaine co-surfactant; wherein the total weight ratio of the total weight of the anionic surfactant to the total weight of the nonionic surfactant ranges from 30:1 to 1:2; and wherein the hydroxysultaine co-surfactant has the formula: R-N + (CH3)2‑CH2‑CH(OH)‑CH2‑SO3 ‑ M + , wherein R is an alkyl chain having C10-C18 and M is any suitable cationic counterion; The present invention also relates to a method, preferably a domestic method for treating fabrics.
Owner:UNILEVER IP HLDG BV

Hair Treatment Compositions and Methods

i) an alpha olefin sulfonate anionic surfactant of general formula (I), wherein R 1 is selected from linear or branched alkyl groups having 11 to 13 carbon atoms and mixtures thereof, and M is a solubilizing cation; (ii) alkyl betaines of general formula (II): 2 is derived from C12 (lauryl), cocamidopropyl or coco.], alkylhydroxysultaine of general formula (III) [wherein R 3 is derived from C12 (lauryl) or coco.], alkylaminopropylhydroxysultaine of general formula (IV) [wherein R 4 = C12 (lauryl) or derived from coco.], alkylamphoacetates of general formula (V) [wherein R 5 is derived from C12 (lauryl) or coco; and an amphoteric or zwitterionic surfactant selected from the group consisting of piroctone compounds, wherein the weight ratio of alpha olefin sulfonate anionic surfactant (i) to amphoteric or zwitterionic surfactant (ii) is in the range of 1:1 to 6:1.
Owner:UNILEVER IP HLDG BV

Shampoo containing oil control composition and preparation method thereof

PendingCN121648028ACosmetic preparationsHair cosmeticsBiotechnologyHydroxysultaine
The invention discloses shampoo containing an oil control composition and a preparation method of the shampoo, and belongs to the technical field of cosmetics. The shampoo containing the oil control composition is prepared from the following components in percentage by mass: 0.02 to 1 percent of radix scutellariae extract, 0.05 to 0.9 percent of camellia seed cake extract, 0.05 to 1.8 percent of an antioxidant, 10 to 30 percent of sodium olefin sulfonate, 10 to 30 percent of lauryl hydroxyl sulfobetaine and 0.5 to 2.5 percent of cocamidomethyl MEA, wherein the scutellaria baicalensis root extract, the camellia seed cake extract and the antioxidant are oil control compositions; the antioxidant oil control composition capable of achieving synergistic interaction is prepared by a method of regulating and controlling pH and uniformly mixing; the oil control composition does not contain preservatives in the traditional sense, is milder and more stable in property, is more suitable for teenager scalp care, and can achieve the effects of oil control, bacteriostasis and dandruff removal.
Owner:HANGZHOU QIANDAOHU TIANXIN CO LTD

Mitigating iron sulfide in gas wells

A method may include introducing a metal sulfide mitigation package comprising a hydroxysultaine dispersing agent, a water-wetting surfactant, and a corrosion inhibitor into a wellbore; contacting a metal sulfide scale in the wellbore with the metal sulfide mitigation package; and dissolving at least a portion of the metal sulfide scale with the metal sulfide mitigation package.
Owner:HALLIBURTON ENERGY SERVICES INC

Detergent composition

PendingJP2026109534APolymer scienceActive agent
The present invention provides a detergent composition that exhibits excellent stability over time, particularly in inhibiting precipitation under low-temperature conditions, and in dispensing from foaming containers, as well as excellent foam retention and smoothness of the skin after use. [Solution] The following components (A) to (D); (A) 1-8% by mass of N-acyl glutamic acid or its salt (B) 1 to 10% by mass of N-acylmethylalanine or its salt (C) Hydroxysulfobetaine-type surfactant in 1 to 10% by mass (D) At least one selected from the group consisting of glycerin and polyethylene glycol with a number average molecular weight of 10,000 or less. A detergent composition containing the following:
Owner:KOSE HOLDINGS CORP

A method for improving recovery of heavy oil reservoirs by foam-assisted steam flooding and application thereof

ActiveCN120889550BFluid removalDrilling compositionMeth-Sweep efficiency
The application provides a method for improving the recovery ratio of a heavy oil reservoir by using a foaming agent assisted steam drive and application, and relates to the technical field of oilfield development. The method comprises the following steps: injecting a steam pre-slug, injecting a nitrogen slug, injecting a foaming agent slug, and injecting a nitrogen mixed steam main slug. In the nitrogen mixed steam main slug, the injection speed ratio of nitrogen and steam is always kept at 1:(2-3), and the steam injection process maintains a slow injection in the early stage, a fast injection in the middle stage, and a slow injection in the late stage. The foaming agent comprises 8-15% of alpha-olefin sulfonate, 1-2% of sodium methyl cocoyl taurate, 12-18% of fatty alcohol polyoxyethylene ether, and 2-3% of lauryl hydroxyl sulfobetaine, and the rest is water. The method can greatly improve the sweep efficiency and displacement efficiency of the heavy oil steam drive, and improve the development effect of the heavy oil steam drive thermal recovery.
Owner:SHANDONG DESHI PETROLEUM EQUIP CO LTD

Detergent compositions comprising secondary alkane sultanate, a second anionic surfactant, and alkyl hydroxysultaine cosurfactant

A detergent composition that includes from 1 to 40 wt. % of a secondary alkane sulfonate surfactant with an average of 15 to 18 carbon atoms in a linear alkane chain, from 1 to 40 wt. % of an anionic surfactant other than the secondary alkane sulfonate surfactant, and from 0.01 to 8% of an alkyl hydroxysultaine co-surfactant. Greater than 50 wt. % of the alkyl chain of the secondary alkane sulfonate is C15 to C18 secondary alkane sulfonate.
Owner:CONOPCO INC

Method for improving recovery ratio of heavy oil reservoir through foaming agent assisted steam flooding and application

The invention provides a method for improving the recovery ratio of a heavy oil reservoir through foaming agent assisted steam flooding and application, and relates to the technical field of oilfield development. The method comprises the following steps: injecting a steam front slug, injecting a nitrogen slug, injecting a foaming agent slug and injecting a nitrogen mixed steam main slug; wherein the ratio of the injection speed of nitrogen to the injection speed of steam is always kept at 1: (2-3) when the nitrogen and the steam are injected into the main slug, and the mode of slow injection in the early stage, quick injection in the middle stage and slow injection in the later stage is kept in the steam injection process; the foaming agent comprises the following components in percentage by weight: 8-15% of alpha-olefin sulfonate, 1-2% of sodium methyl cocoyl taurate, 12-18% of fatty alcohol-polyoxyethylene ether, 2-3% of lauryl hydroxyl sulfobetaine and the balance of water. According to the method, the sweep efficiency and displacement efficiency of the thickened oil steam drive can be greatly improved, and the development effect of the thickened oil steam drive thermal recovery is improved.
Owner:SHANDONG DESHI PETROLEUM EQUIP CO LTD

Mild transparent amino acid shampoo and method for preparing the same

ActiveCN115887290BCosmetic preparationsHair cosmeticsPhosphoric Acid EstersOLEAMIDOPROPYL BETAINE
The present application belongs to the field of cosmetics, and particularly relates to a mild and transparent amino acid shampoo and a preparation method thereof. The shampoo comprises the following components by weight: sodium cocoyl amino propionate, sodium cocoyl methyl taurate, sodium taurate, cocamidopropyl betaine, lauryl hydroxysultaine, disodium EDTA, distearyloxide-5 lauroyl glutamate, citric acid, acrylamidopropyl trimonium chloride / acrylamide copolymer, polyquaternium-10, myristamidopropyl PG-dimethyl ammonium chloride phosphate, polyquaternium-7, p-hydroxyacetophenone, octanoyl hydroxamic acid, cocamide MEA, essence and water. The present application is mild and non-irritating, and the quality is stable and controllable, and is suitable for large-scale production.
Owner:TIANJIN YU MEI JING GRP

Self-emulsifying nano-composite profile control and flooding agent for oil field and preparation process thereof

The application relates to the technical field of chemical oil displacement, and particularly discloses a self-emulsifying nano composite profile control and displacement agent for oil fields and a preparation process thereof. The self-emulsifying nano composite profile control and displacement agent for oil fields is prepared from the following raw materials in a mass ratio of 100: 3-5 parts of amphiphilic nano silicon dioxide, 1-2 parts of amphoteric ion surfactant, 0.5-1 part of non-ionic surfactant, and the balance of water; the amphoteric ion surfactant comprises hydroxyl sulfobetaine and imidazoline; and the non-ionic surfactant is an ethoxy-propoxy block copolymer. The self-emulsifying nano composite profile control and displacement agent prepared by the application effectively realizes the balance between low interfacial tension and self-emulsifying efficiency.
Owner:西安天正石油技术有限公司

A betaine surfactant for high-temperature resistant clean fracturing fluid and preparation and application thereof

The present application relates to a kind of betaine surfactant for high-temperature resistant clean fracturing fluid.The main problem to be solved is that the sand-carrying performance and shear resistance of traditional clean fracturing fluid are poor when well temperature is greater than 90℃, which greatly limits its application in high-temperature reservoirs.The preparation method comprises the following steps: (1) using fatty acid methyl ester and disubstituted urea as raw materials, N,N-dialkyl-1-alkanamide urea intermediate (I) is obtained through condensation reaction; (2) N,N-dialkyl-1-alkanamide urea intermediate I is quaternized with 3-chloro-2-hydroxypropanesulfonic acid sodium to prepare propyl hydroxyl sulfobetaine (II).The betaine surfactant has excellent shear resistance, interfacial properties and oil-washing efficiency under high-temperature conditions, and can be applied to clean fracturing fluid for high-temperature low-permeability sandstone reservoirs, tight oil reservoirs and shale reservoirs.
Owner:DAQING OILFIELD CO LTD +1