Adamantyl-containing hydrophobic association zwitter-ion xanthan gum and preparation method thereof

An adamantyl and zwitterionic technology, which is applied in the field of hydrophobic association zwitterionic xanthan gum and its preparation, can solve problems such as poor temperature resistance, easy fermentation, and weak shear resistance, and achieve improved salt resistance and improved Viscosity-increasing ability, effect of enhancing anti-polyelectrolyte effect

Inactive Publication Date: 2015-11-04
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of adamantyl-containing hydrophobically associated zwitterionic xanthan in order to solve the problems of poor temperature resistance, weak shear resistance and easy fermentation in the existing xanthan gum during use. Glue and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve 30g of xanthan gum, 30g of acrylamide, 45g of sodium acrylate and 10g of acryloyloxyethyltrimethylammonium chloride in water to obtain a reaction system with a mass percent concentration of 7.5%, stir at room temperature until completely dissolved, pour into the reactor;

[0023] Add 31.65 g of sodium dodecyl sulfonate into the reactor, stir, add 1.35 g of adamantyl acrylate after fully dissolving, blow nitrogen under the stirring condition, and raise the temperature to 48°C;

[0024] Add K to the above reaction system 2 S 2 o 8 0.32g, reacted at 48°C for 8.5 hours to obtain a colloidal crude product;

[0025] Add 800mL of absolute ethanol to precipitate and filter, wash the product three times with absolute ethanol and acetone successively, and then use the mixed solvent of glacial acetic acid-ethylene glycol with a volume ratio of 3:2 as the extractant to extract the product with Soxhlet After extracting for 24 hours, vacuum drying at 25°C to constant wei...

Embodiment 2

[0027] Dissolve 120g of xanthan gum, 60g of N, N-methylenebisacrylamide, 60g of sodium methacrylate and 14.5g of 2-hydroxyl-3-methacryloxypropyltrimethylammonium chloride in water to obtain The reaction system with a mass percent concentration of 15% was stirred at room temperature until it was completely dissolved, and then poured into the reactor;

[0028] Add 9.46 g of OP-1016 to the reactor, stir, add 1.82 g of adamantyl methacrylate after fully dissolving, blow nitrogen under the stirring condition, and raise the temperature to 65°C;

[0029] Add 3.73 g of azobisisobutyronitrile to the above reaction system, and react at 65°C for 6 hours to obtain a crude colloidal product;

[0030] Add 850mL of absolute ethanol to precipitate and filter, wash the product three times with absolute ethanol and acetone successively, and then use the mixed solvent of glacial acetic acid-ethylene glycol with a volume ratio of 3:2 as the extraction agent to extract the product by Soxhlet Extr...

Embodiment 3

[0032] 60g of xanthan gum, 45.5g of N,N-diethylacrylamide, 36.5g of sodium methacrylate and 14.5g of dimethyl diallyl ammonium chloride were dissolved in water to obtain a concentration of 12.5% ​​by mass. The reaction system was stirred at room temperature until completely dissolved, and poured into the reactor;

[0033] Add 50.0 g of sodium octadecylbenzene sulfonate to the reactor, stir, add 1.44 g of adamantyl acrylate after fully dissolving, blow nitrogen under stirring conditions, and raise the temperature to 45°C;

[0034] Add (NH 4 ) 2 S 2 o 8 1.02g, reacted at 45°C for 12 hours to obtain a colloidal crude product;

[0035] Add 850mL of absolute ethanol to precipitate and filter, wash the product three times with absolute ethanol and acetone successively, and then use the mixed solvent of glacial acetic acid-ethylene glycol with a volume ratio of 3:2 as the extraction agent to extract the product by Soxhlet It was extracted for 24 hours, and vacuum-dried to consta...

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Abstract

The invention discloses adamantyl-containing hydrophobic association zwitter-ion xanthan gum and a preparation method thereof. The adamantyl-containing xanthan gum is prepared from raw materials in parts by weight as follows: 30-120 parts of xanthan gum, 1-2 parts of adamantly hydrophobic monomers, 30-70 parts of alkenyl amide, 25-60 parts of alkenyl carboxylate and 10-30 parts of alkenyl quaternary ammonium salt. The preparation method comprises steps as follows: Step one, all the raw materials are dissolved in distilled water and stirred at the room temperature until complete dissolution, and the solution is poured into a reactor; Step two, a surfactant is added to the reactor; Step three, an initiator is added to a reaction system obtained in Step two; Step four, absolute ethyl alcohol is added to a colloidal crude product obtained in Step three for precipitation, filtration is performed, and a finished product of the adamantyl-containing hydrophobic association zwitter-ion xanthan gum is obtained. The xanthan gum and the preparation method have the benefits as follows: the anti-polyelectrolyte effect of the solution is enhanced and the salt resistance is improved.

Description

technical field [0001] The invention relates to a xanthan gum and a preparation method thereof, in particular to an adamantyl-containing hydrophobic association zwitterionic xanthan gum and a preparation method thereof. Background technique [0002] Xanthan gum (XG), also known as xanthan gum, is an extracellular acidic polysaccharide secreted by Xanthomonas campestris, and is an important industrial biopolymer. The skeleton structure of xanthan gum is similar to cellulose. It is a natural anionic bioheteropolysaccharide. Its side chain contains functional groups such as carboxyl and hydroxyl groups, so it has many excellent properties such as high viscosity, thixotropy, suspension and thickening. In the field of oil and gas field development, it is mainly used in drilling fluid, completion fluid, fracturing fluid and tertiary oil recovery. Because the thickening effect of xanthan gum is particularly prominent, it is mainly used as a thickener and flow control agent in prac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/18C08F220/56C08F220/54C08F222/38C08F220/58C08F220/06C08F220/04C08F220/34C08F226/02C08F220/36
Inventor 葛春梅李继茂张天笑陈玉平陈业鹏马艳超陈晓峰贾志刚穆国臣
Owner CHINA PETROLEUM & CHEM CORP
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