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A kind of self-thickening surfactant and preparation method thereof

A surfactant, self-thickening technology, used in the preparation of carboxylic acid esters, the preparation of carboxylic acid halides, chemical instruments and methods, etc., can solve difficult biodegradation, increased cost of viscoelastic fluids, high toxicity and irritation and other problems, to achieve the effect of strong self-assembly ability, convenient on-site preparation and viscosity reduction

Active Publication Date: 2021-04-06
盘锦辽河油田华联实业集团有限公司
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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 self-thickening surfactant and preparation method thereof
  • A kind of self-thickening surfactant and preparation method thereof
  • A kind of self-thickening surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 3 mmol erucic acid chloride and 3 mmol salicylic acid were solubilized in 50 g nanoemulsion (13.5 g 1-butyl-3-methylimidazolium hexafluorophosphate, 12.5 g DMSO and 24 g water), respectively, Then, the nanoemulsion containing erucic acid chloride was added dropwise into the nanoemulsion containing salicylic acid at 30° C., and stirred for 1 hour.

[0039] Aqueous sodium hydroxide (3 mmol) was added dropwise and stirring was continued for 0.5 hours. The temperature was lowered to 20° C., the water layer was collected, and the solvent was spin-dried to obtain the sodium salt of salicylate erucate, and the yield was 97% as measured by high performance liquid chromatography.

Embodiment 2

[0041] Solubilize 3 mmol of stearic acid chloride and 3 mmol of salicylic acid respectively in 50 g of nanoemulsion (15 g of 1-butyl-3-methylimidazolium hexafluorophosphate, 15 g of DMSO and 20 g of water) , and then the nanoemulsion containing stearic acid chloride was added dropwise to the nanoemulsion containing salicylic acid at 30° C., and stirred for 1.5 hours.

[0042] Aqueous potassium hydroxide (3 mmol) was added dropwise and stirring was continued for 1 hour. The temperature was lowered to 20° C., the water layer was collected, and the solvent was spin-dried to obtain the potassium salt of salicylate stearate, and the yield was 95% as measured by high performance liquid chromatography.

Embodiment 3

[0044] Solubilize 3 mmol of behenic acid chloride and 3 mmol of salicylic acid, respectively, in 50 g of nanoemulsion (17 g of 1-butyl-3-methylimidazolium hexafluorophosphate, 14 g of DMSO, and 19 g of water) , and then drop the nanoemulsion containing behenic acid chloride into the nanoemulsion containing salicylic acid at 30° C., and stir for 1 hour.

[0045] An aqueous solution of choline hydroxide (3 mmol) was added dropwise and stirring was continued for 0.5 hours. The temperature was lowered to 20° C., the water layer was collected, and the solvent was spin-dried to obtain the choline behenate salicylate, and the yield was 99% as measured by high performance liquid chromatography.

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Abstract

The invention discloses a self-thickening surfactant and a preparation method thereof. The self-thickening surfactant is composed of fatty acid chloride and salicylic acid in 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid The ionic liquid-in-water nanoemulsion composed of ‑water‑DMSO is obtained by reacting at room temperature, and the separation of the product can be realized after cooling down, and the yield is above 95%. The self-thickening surfactant of the present invention dissolves quickly at a reduced temperature, has strong self-assembly ability, and can realize thickening of an aqueous solution at a lower concentration without any additives.

Description

technical field [0001] The invention belongs to the technical field of surfactants and viscoelastic fluids, and in particular relates to a self-thickening surfactant and a preparation method thereof. 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, CN102643637A, CN1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/533C07C69/24C07C69/58C07C67/14C07C67/28C07C209/68C07C211/63
CPCC07C67/14C07C67/28C07C69/24C07C69/533C07C69/58C07C209/68C07C211/63
Inventor 张永民杨哲赵艳涛
Owner 盘锦辽河油田华联实业集团有限公司
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