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Sulfonyl-containing hydroxypropyl fenugreek gum and preparation method and application of fenugreek gum

A technology containing sulfonic acid hydroxypropyl group and sulfonic acid hydroxypropyl group is applied in the field of modified products of natural plant polysaccharides, which can solve the problems that the salt resistance and temperature resistance of fenugreek gum cannot meet the needs of industrial production, etc. Achieve the effects of low water insoluble content, good salt tolerance and fast dissolution speed

Inactive Publication Date: 2017-03-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the salt resistance and temperature resistance of fenugreek gum still cannot meet the needs of industrial production

Method used

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  • Sulfonyl-containing hydroxypropyl fenugreek gum and preparation method and application of fenugreek gum
  • Sulfonyl-containing hydroxypropyl fenugreek gum and preparation method and application of fenugreek gum
  • Sulfonyl-containing hydroxypropyl fenugreek gum and preparation method and application of fenugreek gum

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Experimental program
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Effect test

preparation example Construction

[0045] The above-mentioned preparation method of sulfonated hydroxypropyl fenugreek gum comprises the following steps:

[0046] (1) Add 100.0g of hydroxypropyl fenugreek gum to 1L of alcohol aqueous solution;

[0047] (2) Introduce nitrogen gas, add sodium hydroxide aqueous solution (sodium hydroxide content is 1g-3g) dropwise while stirring, and add dropwise time for 0.5h; then stir and heat up to 70-85°C, add dropwise 0.03g-0.6g sulphur chemical agent, the dropwise addition time is 1h, and the dropwise addition is completed for 2-4 hours, preferably 3 hours;

[0048] (3) Adjust the reaction solution with acid to neutrality, filter and vacuum dry to obtain light yellow powder, which is sulfonic acid group-containing hydroxypropyl fenugreek gum.

[0049] In step (1):

[0050] The alcohol aqueous solution is an ethanol aqueous solution, and the mass fraction is 50%-80%, preferably 50%. ;

[0051] The mass fraction of the sodium hydroxide aqueous solution is 5%-30%, preferab...

Embodiment 1

[0087] The preparation method of sulfonic acid-modified hydroxypropyl fenugreek gum, the steps are as follows:

[0088] (1) In the reactor of 1L 50% ethanol solution, add 100.0g hydroxypropyl fenugreek gum;

[0089] (2) Under nitrogen atmosphere, add dropwise 10.0g 10% sodium hydroxide aqueous solution, add dropwise for 0.5h, heat up to 70°C, stir for 0.5 hour, add dropwise 0.30g 10% sodium 3-chloro-2-hydroxypropanesulfonate solution, The constant temperature was 70 °C, the dropwise addition was completed for 1 h, and the stirring was continued for 2 hours;

[0090] (3) The reaction solution was neutralized to neutral, filtered and dried in vacuum to obtain SHFG-1 as a light yellow powder.

[0091] Product performance test results:

[0092] The degree of substitution (DS) of the product SHFG-1 is 0.021.

[0093] The water-insoluble content of the product SHFG-1 is 9.0%.

[0094] The crystallinity of the product SHFG-1 decreases, and the introduction of sulfonic acid groups...

Embodiment 2

[0099] The preparation method of sulfonic acid-modified hydroxypropyl fenugreek gum, the steps are as follows:

[0100] (1) In the reactor of 1L 50% ethanol solution, add 100.0g hydroxypropyl fenugreek gum;

[0101] (2) Under nitrogen atmosphere, add dropwise 15.0g 10% sodium hydroxide aqueous solution, add dropwise for 0.5h, heat up to 80°C, stir for 0.5 hour, add dropwise 3.0g 20% ​​sodium 3-chloro-2-hydroxypropanesulfonate solution , 1h was added dropwise, and continued stirring for 2 hours;

[0102] (3) The reaction solution was neutralized to neutral, filtered, and dried in vacuum to obtain SHFG-2 as a light yellow powder.

[0103] Product performance test results:

[0104] The degree of substitution (DS) of the product SHFG-2 is 0.21.

[0105] The water-insoluble content of the product SHFG-2 is 5.0%; compared with Example 1, the water-insoluble content is reduced.

[0106] The crystallinity of the product SHFG-2 is 1.71%.

[0107] The apparent viscosity of the aque...

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Abstract

The invention includes sulfonyl-containing hydroxypropyl fenugreek gum and a preparation method and application of the fenugreek gum. At present, chemical modification of the fenugreek gum is rarely performed, and the salt resistance and temperature resistance of the fenugreek gum can not meet industrial production demands. The preparation method includes the following steps: adding hydroxypropyl fenugreek gum in an alcohol aqueous solution; introducing nitrogen; dropwise adding a sodium hydroxide aqueous solution while stirring the solution; increasing the temperature and adding a sulfonating agent for reaction; adjusting the reaction solution by acids to be neutral; conducting filtering and vacuum drying to obtain light yellow powder, namely, the sulfonyl-containing hydroxypropyl fenugreek gum. By introducing sulfonyl to modify the hydroxypropyl fenugreek gum, the salt resistance and temperature resistance of jelly are improved, the content of water insoluble matters is low, the use efficiency of the sulfonyl-containing hydroxypropyl fenugreek gum is improved, and the cost is saved.

Description

technical field [0001] The invention relates to a modified product of natural plant polysaccharide, in particular to a sulfonic acid group-containing hydroxypropyl fenugreek gum and a preparation method and application thereof. Background technique [0002] With the development of science and technology and the improvement of processing technology, the function of fenugreek gum has become more and more reflected, especially in the field of petrochemical industry, fenugreek gum is expected to replace guar gum as a thickening agent. Fenugreek gum is a natural polymer compound with high hydroxyl content, which can be cross-linked with a cross-linking agent to form a high-viscoelastic jelly, which is used in fracturing stimulation. However, fenugreek gum has a slow dissolution rate, high water-insoluble content, and high residue content after breaking the gel, which restricts its use in oilfield industry. To meet the needs of the fracturing production industry, vegetable gums a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00C09K8/68
CPCC08B37/00C08B37/0087C09K8/685C09K8/887
Inventor 沈一丁秋列维王晨杨晓武李培枝
Owner SHAANXI UNIV OF SCI & TECH
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