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A kind of soluble/crackable/self-thickening surfactant and preparation method

A surfactant and easy-to-dissolve technology, applied in chemical instruments and methods, dissolution, carboxylate preparation, etc., can solve the problems of increased cost of viscoelastic fluids, increased system complexity, high toxicity and irritation, etc., to achieve Convenient on-site preparation, reduced viscosity, and strong salt resistance

Active Publication Date: 2021-03-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This virtually increases the complexity of the system
In addition, cationic surfactants are more toxic and irritating than anionic surfactants, and are more difficult to biodegrade
The production process of zwitterionic surfactants is often more complex and cumbersome than that of anionic surfactants, especially compared to fatty acid salt anionic surfactants, resulting in an increase in the cost of viscoelastic fluids

Method used

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  • A kind of soluble/crackable/self-thickening surfactant and preparation method
  • A kind of soluble/crackable/self-thickening surfactant and preparation method
  • A kind of soluble/crackable/self-thickening surfactant and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 10 mmoles of mustard alcohol and 10 mmoles of phthalic anhydride into the flask, heat to 100° C., stir and reflux for 1 hour. The product was transferred to petroleum ether for stirring, washed, suction filtered, and vacuum-dried to obtain a white powder, namely erucyl phthalate monoester, and the yield was 90% as determined by high performance liquid chromatography.

[0038] Weigh 3 mmoles of erucyl phthalate monoester and 3 mmoles of choline hydroxide and dissolve in water, stir at room temperature for 0.5 hour, and spin the solvent to obtain erucyl phthalate monoester choline salt.

Embodiment 2

[0040] Add 10 mmoles of behenyl alcohol and 10 mmoles of phthalic anhydride into the flask, heat to 140° C., stir and reflux for 4 hours. The product was transferred to petroleum ether for stirring, washed, suction filtered, and vacuum-dried to obtain a white powder, ie behenyl phthalate monoester, with a yield of 92% as measured by high performance liquid chromatography.

[0041] Weigh 3 mmoles of behenyl phthalate monoester and 3 mmoles of benzyltrimethylammonium hydroxide and dissolve them in methanol, stir at room temperature for 1 hour, spin the solvent to obtain behenyl phthalate monoester benzyl Trimethyl quaternary ammonium salt.

Embodiment 3

[0043] Add 10 mmol arachidene alcohol and 10 mmol phthalic anhydride into the flask, heat to 120° C., stir and reflux for 2 hours. The product was transferred to petroleum ether for stirring, washed, suction filtered, and vacuum-dried to obtain a white powder, that is, arachidene alcohol phthalate monoester, and the yield was 96% as determined by high performance liquid chromatography.

[0044] Weigh 3 mmoles of arachidyl phthalate monoester and 3 mmoles of tetramethylammonium hydroxide and dissolve them in ethanol, stir at room temperature for 1.5 hours, and spin the solvent to obtain arachidyl phthalate monoester tetramethyl quaternary ammonium salt.

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Abstract

The invention discloses an easily soluble / crackable / self-thickening surfactant and a preparation method. The easily soluble / crackable / self-thickening surfactant is composed of alkyl alcohol phthalate monoester and alkali at room temperature After equimolar mixing, the reaction was stirred for 0.5 to 4 hours, and the solvent was removed to obtain it. The easily soluble / cleavable / self-thickening surfactants of the present invention can be quickly dissolved at a reduced temperature, have strong self-assembly ability, can realize viscosity-increasing of aqueous solutions at lower concentrations, and show better performance than traditional surfactants. Carboxylate surfactants have stronger salt tolerance.

Description

technical field [0001] The invention belongs to the technical field of surfactants and viscoelastic fluids, and in particular relates to an easily soluble / cleavable / self-thickening surfactant and a preparation method. Background technique [0002] Surfactant is an amphiphilic molecule composed of a hydrophilic head group and a hydrophobic tail chain. It can self-assemble in aqueous solution to form a variety of aggregate structures, showing unique physical and chemical properties. It is widely used in washing, food, Drugs, coatings, textiles, construction, oil extraction and other fields. [0003] Surfactants with specific structures can thicken aqueous solutions to form viscoelastic fluids similar to polymer solutions under certain conditions, and can be used as clean fracturing fluids for oil and gas field stimulation, transport carriers for functional components, or product viscosity increase. Most of the current viscoelastic fluids are cationic surfactants (CN10395199A,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/00C07C67/08C07C67/30C07C69/80C09K8/68C09K23/00
CPCC07C69/80C07C67/30C07C67/08C09K8/602C09K8/68C09K2208/30C09K23/00
Inventor 张永民刘雪峰张志东
Owner JIANGNAN UNIV
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