The method for preparing carboxymethyl hydroxypropyl guar gum powder by one-step method of guar gum sheet

A technology of carboxymethyl hydroxypropyl guar powder and guar film, which is applied in the field of preparation of carboxymethyl hydroxypropyl guar gum, can solve the problems of long reaction time and high cost, and achieves short reaction time and easy operation. Simple, low water-insoluble content

Active Publication Date: 2017-02-01
山东广浦生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction time required for step-by-step synthesis is long, and guar gum powder, as a processed product of guar film, is more expensive than guar film

Method used

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  • The method for preparing carboxymethyl hydroxypropyl guar gum powder by one-step method of guar gum sheet
  • The method for preparing carboxymethyl hydroxypropyl guar gum powder by one-step method of guar gum sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The method for preparing carboxymethyl hydroxypropyl guar powder by one-step guar film, the steps are as follows:

[0024] To a multi-necked flask with mechanical stirring, a thermometer, a dropping funnel and a reflux condenser, add 100 g of guar chips, 200 g of isopropanol, and 100 g of water; the temperature is raised to 45°C. 40 g of a 30 wt % aqueous sodium hydroxide solution was added, and the basification reaction was maintained at 45° C. for 30 min. At the same time, 30 g of sodium chloroacetate and 40 g of propylene oxide were added to the system, and the reaction was performed for 120 min after the addition. After the reaction, the temperature was lowered to 30° C., washed with 80% isopropanol aqueous solution, pulverized and dried to obtain the finished product.

[0025] The molar substitution degree of hydroxypropyl of the obtained product is 0.54, and the molar substitution degree of hydroxypropyl is abbreviated as Ms(PO) in the following examples; the mol...

Embodiment 2

[0027] The method for preparing carboxymethyl hydroxypropyl guar powder by one-step guar film, the steps are as follows:

[0028] To a multi-necked flask with mechanical stirring, a thermometer, a dropping funnel and a reflux condenser, add 100 g of guar chips, 200 g of isopropanol, and 100 g of water; the temperature is raised to 45°C. 60 g of 30 wt % aqueous sodium hydroxide solution was added, and the reaction was maintained at 45° C. for 30 min for alkalization. At the same time, 30 g of sodium chloroacetate and 30 g of 1,2-epoxybutane were added to the system, and the reaction was performed for 120 min after the addition. After the reaction, the temperature was lowered to 30° C., washed with 80% isopropanol aqueous solution, pulverized and dried to obtain the finished product.

[0029] The molar substitution degree of hydroxybutyl group is 0.41; the molar substitution degree of carboxymethyl group is 0.14; the water insoluble matter is 1.84%.

Embodiment 3

[0031] The method for preparing carboxymethyl hydroxypropyl guar powder by one-step guar film, the steps are as follows:

[0032] To a multi-necked flask with mechanical stirring, a thermometer, a dropping funnel and a reflux condenser, add 100 g of guar chips, 200 g of isopropanol, and 100 g of water; the temperature is raised to 45°C. 60 g of 30 wt % aqueous sodium hydroxide solution was added, and the reaction was maintained at 45° C. for 30 min for alkalization. At the same time, 10 g of chloroacetic acid, 10 g of sodium chloroacetate, and 40 g of propylene oxide were added to the system, and the reaction was performed for 120 min after the addition. After the reaction, the temperature was lowered to 30° C., washed with 80% isopropanol aqueous solution, pulverized and dried to obtain the finished product.

[0033] The molar substitution degree of hydroxypropyl group is 0.51, the molar substitution degree of carboxymethyl group is 0.16, and the water insoluble matter is 2....

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Abstract

The invention relates to a method for preparing carboxymethyl hydroxypropyl guar gum powder by a guar gum sheet one-step method. The method comprises the following steps of adding guar gum sheets into an organic solvent-water mixed solution, heating the solution to a temperature of 30-80 DEG C, adding a sodium hydroxide solution into the heated mixed solution, carrying out an alkalization reaction process for 2-60min, then adding an etherifying agent into the reaction product, carrying out a reaction process at a temperature of 30-80 DEG C for 30-180min, then carrying out cooling and filtration, washing the filter residue, carrying out crushing, and carrying out drying to obtain a finished product. The method utilizes cheap guar gum sheets as raw materials, realizes carboxymethyl and hydroxyalkyl etherification modification by the one-step method, and greatly shortens reaction time than a multi-step method. Through synchronization of carboxymethylation and hydroxyalkylation, processes are simple and convenient, reaction time is short, and the product has low water-insoluble substance content, good crosslinking performances, good fracture initiation and sand-carrying functions and good application prospects in the field of oil field pressing crack liquids. The method has a wide application prospect in the field of oil field auxiliary agents.

Description

technical field [0001] The invention relates to a method for preparing carboxymethyl hydroxypropyl guar gum, in particular to a method for preparing carboxymethyl hydroxypropyl guar gum powder by one-step method from guar film. Background technique [0002] Guar gum is a vegetable gum that is isolated, extracted and purified from the endosperm of guar beans widely grown in India and Pakistan. Its main component is galactomannan, which is a non-ionic polysaccharide in terms of its molecular structure. The key is connected to the main chain. The ratio of mannose to galactose is about 2:1, and the ratio of the two varies slightly depending on the place of origin. The relative molecular weight of guar gum is generally between 200,000 and 2,000,000. Guar gum is a good natural water-soluble thickener. It is one of the best water-soluble natural polymer compounds known at present. It is widely used in papermaking, Textile, food and petroleum industries. [0003] Guar collagen p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00
Inventor 宋纯亮倪佳倩吴曙光朱虎郝健
Owner 山东广浦生物科技有限公司
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