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A kind of preparation method of food grade sodium carboxymethylcellulose

A technology of sodium carboxymethyl cellulose and cellulose, which is applied in the field of preparation of food grade sodium carboxymethyl cellulose, can solve the problems of low purity, poor acid resistance, and poor performance of sodium carboxymethyl cellulose, and achieves superior performance. Effects of stability, lower production costs, and lower solvent consumption

Active Publication Date: 2016-05-18
上海长光企业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to solve the defects of existing sodium carboxymethylcellulose such as low purity, poor acid resistance and poor performance, and provide a preparation method of food grade sodium carboxymethylcellulose

Method used

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  • A kind of preparation method of food grade sodium carboxymethylcellulose
  • A kind of preparation method of food grade sodium carboxymethylcellulose
  • A kind of preparation method of food grade sodium carboxymethylcellulose

Examples

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Embodiment 1

[0042] A preparation method of edible sodium carboxymethyl cellulose, which comprises the following steps:

[0043] (1) In the kneader, mix 1101g of 49.5wt% NaOH aqueous solution and 1400mL of 91v / v% ethanol solution at 15-35°C for 20min, and put 1000g of refined cotton cellulose into the kneader, Obtain Mixture A; then mix 301g of 49.5wt% NaOH aqueous solution with 1000ml of 91v / v% ethanol aqueous solution by spraying and mix the lye with Mixture A at 15-40°C Alkalization reaction for 50min, after reaction, alkalinized cellulose is obtained;

[0044] (2) Mix 762g of ethanol aqueous solution of chloroacetic acid with a concentration of 70wt% and alkalized cellulose within 20min by spraying, the mixing temperature is controlled within 15-40℃, and the concentration of ethanol aqueous solution is 91v / v% , Stir at a speed of 20 rpm for 10 minutes to obtain mixture B;

[0045] (3) Mix 381g of the ethanol aqueous solution of chloroacetic acid with a concentration of 70wt% and the mixture...

Embodiment 2

[0057] A preparation method of edible sodium carboxymethyl cellulose, which comprises the following steps:

[0058] (1) Mix 873g of 50.2wt% NaOH aqueous solution and 1350mL of 90v / v% ethanol solution in a kneader at 15-35°C for 30 minutes, and put 1000g of broken wood pulp cellulose into kneading In the machine, mixture A is obtained; then 335g of 50.2wt% NaOH aqueous solution and 1000ml of 91v / v% ethanol aqueous solution are mixed with lye and Mixture A by spraying, at 15-35 Carry out alkalization reaction at ℃ for 50min, after reaction, alkalized cellulose is obtained;

[0059] (2) Mix 635g of 75wt% chloroacetic acid ethanol solution with alkalized cellulose by spraying within 20min, the mixing temperature is controlled within 15-40℃, and the concentration of ethanol solution is 95v / v% , Stir at a speed of 40 rpm for 10 minutes to obtain mixture B;

[0060] (3) Mix 272g of ethanol solution of chloroacetic acid with a concentration of 75w% and mixture B within 15 minutes by sprayi...

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Abstract

The invention discloses a preparation method of edible-grade sodium carboxymethylcellulose. The preparation method comprises the following steps of 1, carrying out alkalization treatment on cellulose by NaOH to obtain alkali cellulose, 2, mixing the alkali cellulose and an etherifying agent in 10-50min and carrying out stirring at a temperature of 15-40 DEG C for 10-25min to obtain a mixture B, wherein the etherifying agent is an ethanol aqueous solution of chloroacetic acid, 3, mixing the mixture B and an etherifying agent in 5-20min and carrying out stirring at a temperature of 15-40 DEG C for 10-30min to obtain a mixture C, wherein the etherifying agent is an ethanol aqueous solution of chloroacetic acid, and 4, carrying out etherifying on the mixture C and then carrying out neutralization washing and / or aftertreatment. The preparation method improves edible-grade sodium carboxymethylcellulose application performances, effectively reduces a cellulose degradation rate, improves application characteristics and has specific performances in food production application.

Description

Technical field [0001] The invention relates to a preparation method of food grade sodium carboxymethyl cellulose. Background technique [0002] Food grade sodium carboxymethyl cellulose (also called CMC-Na) is chemically synthesized from refined natural cellulose, NaOH and monochloroacetic acid. The refined high-purity sodium carboxymethyl cellulose is used in the food industry and is also called edible cellulose gum. It is the second generation of edible cellulose gum that replaces natural sodium alginate, gelatin, and agar. Because of its many excellent properties, sodium carboxymethyl cellulose has been widely used in industries such as food, petroleum drilling, textiles, papermaking, cigarettes, toothpaste, detergents, medicine, cosmetics, etc., which can improve product performance and save raw materials. Improve the efficacy and promote the development of production has a good effect. So some people call sodium carboxymethyl cellulose "industrial monosodium glutamate". ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B11/12
Inventor 丁长光朱宏彬万志钢倪志青
Owner 上海长光企业发展有限公司
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