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Preparation method of edible-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, poor performance of sodium carboxymethyl cellulose, etc., and achieves superior performance. Effects of stability, lower production costs, and lower solvent consumption

Active Publication Date: 2014-10-08
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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Examples

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Embodiment 1

[0042] A preparation method of edible grade sodium carboxymethylcellulose, which comprises the steps of:

[0043] (1) Mix 1101g of NaOH aqueous solution with a concentration of 49.5wt% and 1400mL of ethanol solution with a concentration of 91v / v% in a kneader for 20min at 15-35°C, and put 1000g of refined cotton cellulose into the kneader, Obtain mixture A; then by spraying, 301g concentration of 49.5wt% NaOH aqueous solution and 1000ml concentration of 91v / v% ethanol solution mixed with lye and mixture A are mixed at 15-40°C Alkaline reaction for 50 minutes, after the reaction, alkalized cellulose is obtained;

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

[0045] (3) Mix 381g of 70wt% ethanol aqueous solution of chlo...

Embodiment 2

[0057] A preparation method of edible grade sodium carboxymethylcellulose, which comprises the steps of:

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

[0059] (2) Mix 635g of ethanol aqueous solution of chloroacetic acid with a concentration of 75wt% and alkalized cellulose by spraying within 20 minutes, the mixing temperature is controlled within 15-40°C, and the concentration of ethanol aqueous solution is 95v / v% , stirred at a speed of 40rpm for 10mi...

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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 edible grade sodium carboxymethylcellulose. Background technique [0002] Food grade sodium carboxymethyl cellulose (also known as 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, also known as edible cellulose gum, which is the second-generation edible cellulose gum that replaces natural sodium alginate, gelatin, and agar. Because carboxymethyl cellulose sodium has many excellent properties, it is widely used in food, oil drilling, textile, paper, cigarette, toothpaste, detergent, medicine, cosmetics and other industries. It can improve product performance and save raw materials. Improve efficacy, promote production development and play a good effect. Therefore, some people call sodium carboxymethyl cellulose "industrial monosodium glutamate". [0003] The Food and Agr...

Claims

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Application Information

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Patent Type & Authority Applications(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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