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

A technology of carboxymethyl hydroxypropyl guar gum powder and guar gum sheet, 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 achieve short reaction time and easy operation Convenience and low water-insoluble content

Active Publication Date: 2014-11-05
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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  • Method for preparing carboxymethyl hydroxypropyl guar gum powder by guar gum sheet one-step method
  • Method for preparing carboxymethyl hydroxypropyl guar gum powder by guar gum sheet one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The method for preparing carboxymethyl hydroxypropyl guar gum powder by one-step method of guar gum sheet, step is as follows:

[0024] Add 100 g of guar gum flakes, 200 g of isopropanol, and 100 g of water into a multi-necked flask equipped with a mechanical stirrer, a thermometer, a dropping funnel, and a reflux condenser; heat up to 45°C. Add 40 g of 30 wt % sodium hydroxide aqueous solution, and keep 45 ° C for alkalization reaction for 30 min. At the same time, add 30 g of sodium chloroacetate and 40 g of propylene oxide into the system, and react for 120 minutes after adding. After the reaction, cool down to 30°C, wash with 80% isopropanol aqueous solution, pulverize and dry to obtain the finished product.

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

Embodiment 2

[0027] The method for preparing carboxymethyl hydroxypropyl guar gum powder by one-step method of guar gum sheet, step is as follows:

[0028] Add 100 g of guar gum flakes, 200 g of isopropanol, and 100 g of water into a multi-necked flask equipped with a mechanical stirrer, a thermometer, a dropping funnel, and a reflux condenser; heat up to 45°C. Add 60 g of 30 wt % sodium hydroxide aqueous solution, and keep 45 °C for alkalization reaction for 30 min. At the same time, 30 g of sodium chloroacetate and 30 g of 1,2-butylene oxide were added to the system, and reacted for 120 minutes after adding. After the reaction, cool down to 30°C, wash with 80% isopropanol aqueous solution, pulverize and dry 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 gum powder by one-step method of guar gum sheet, step is as follows:

[0032] Add 100 g of guar gum flakes, 200 g of isopropanol, and 100 g of water into a multi-necked flask equipped with a mechanical stirrer, a thermometer, a dropping funnel, and a reflux condenser; heat up to 45°C. Add 60 g of 30 wt % sodium hydroxide aqueous solution, and keep 45 °C for alkalization reaction for 30 min. 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 reacted for 120 minutes after adding. After the reaction, cool down to 30°C, wash with 80% isopropanol aqueous solution, pulverize and dry 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 2.13%.

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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 preparation method of carboxymethyl hydroxypropyl guar gum, in particular to a method for preparing carboxymethyl hydroxypropyl guar gum powder by one-step method from guar gum flakes. Background technique [0002] Guar gum is a plant gum that is isolated, extracted and purified from the endosperm of guar beans widely planted in India and Pakistan. Its main component is galactomannan, which is a non-ionic polysaccharide in terms of its molecular structure. Bonds are 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 origin. The relative molecular weight of guar gum is generally 200,000-2 million. Guar gum is a good natural water-soluble thickener. It is one of the best water-soluble natural polymer compounds known so far. It is widely used in papermaking, Textile, food and petroleum industries. [0003] Guar collagen powder can only be dis...

Claims

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Application Information

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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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