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Preparation method for sodium carboxymethyl cellulose for foodstuff

A technology of sodium carboxymethyl cellulose and wood pulp cellulose, which is applied in the field of polymer chemistry, can solve the problems of difficult post-processing technology, limited popularization and application, and high cost of raw materials, so as to achieve thickening and improve the taste of food, and replace uniform The effect of good performance and simple preparation method

Inactive Publication Date: 2009-10-07
上海长光企业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high cost of raw materials, low etherification efficiency, and difficult post-processing technology in the current CMC production process, the viscosity of the product is high, which greatly limits its popularization and application.

Method used

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  • Preparation method for sodium carboxymethyl cellulose for foodstuff
  • Preparation method for sodium carboxymethyl cellulose for foodstuff

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Under the reaction conditions of 20°C, add 240 parts of 94% (volume) ethanol solvent and 102 parts of 52% sodium hydroxide to the mixture of 100 parts of wood pulp cellulose with a degree of polymerization of 1000 after pulverization and pretreatment within 20 minutes. In the solution, the alkalization reaction was carried out for 50 minutes under stirring conditions, and then 95 parts of 65% ethanol solution of monochloroacetic acid was evenly added within 50 minutes, and the temperature was raised to 80°C with stirring, and the etherification reaction was carried out for 50 minutes, and the material was cooled and discharged; with 3000 parts Wash with 76% ethanol aqueous solution for 35 minutes, and at the same time use 3 parts of 15% hydrochloric acid solution to neutralize the remaining sodium hydroxide, add 7 parts of 27.5% aqueous hydrogen peroxide solution during washing, centrifuge to separate ethanol aqueous solution, and then use 4000 parts of 70 % (volume) eth...

Embodiment 2

[0029] Under the reaction condition of 40°C, within 10 minutes, add 280 parts of 94% (volume) ethanol solvent and 128 parts of 47% sodium hydroxide to 100 parts of wood pulp cellulose with a degree of polymerization of 1000 after pulverization and pretreatment. In the mixed solution, the alkalization reaction was carried out for 90 minutes under stirring conditions, and then 88 parts of 75% ethanol solution of monochloroacetic acid were uniformly added within 20 minutes, and the temperature was raised to 75°C with stirring, the etherification reaction was carried out for 100 minutes, and the material was cooled and discharged; Parts of 74% (volume) aqueous ethanol was washed for 40 minutes, while 7 parts of 30% hydrochloric acid solution was used to neutralize the remaining sodium hydroxide, 9 parts of 27.5% aqueous hydrogen peroxide were added during washing, the aqueous ethanol was separated by centrifugation, and then Wash with 3800 parts of 72% (volume) ethanol aqueous solu...

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Abstract

The invention discloses a preparation method for low viscosity sodium carboxymethyl cellulose for foodstuff. Under the conditions of proper temperature and stirring, wood pulp cellulose raw materials which are pulverized and pretreated is reacted with ethanol solution of sodium hydroxide in a kneader to form soda cellulose; ethanol solution of monochloroacetic acid is added, and the temperature of the reaction system slowly rises for carrying out etherification reaction; hydrochloric acid solution is dripped to neutralize residual sodium hydroxide in the system, and reaction material is rinsed twice by ethanol and hydrogen peroxide solution; and finally, the sodium carboxymethyl cellulose can be prepared after the steps of drying and pulverization are accomplished. The method has the advantages of simplicity, low cost, high yield and convenient operation, the product is white or yellowish powder, the purity is high and is no less than 99.0 percent, and the viscosity is low and ranges from 22 to 48 Mpa.s; and besides, the sodium carboxymethyl cellulose has favorable homogeneity of substitution and good acid resistance, can be widely applied to foodstuff and beverages to be used as emulsified and suspended stabilizing agent to play the role of thickening, and can improve the mouthfeel of the foodstuff.

Description

technical field [0001] The invention relates to the technical field of polymer chemistry, and mainly relates to a preparation method of sodium carboxymethyl cellulose for food. Background technique [0002] Carboxymethyl cellulose (Carboxymethyl Cellulose) is a derivative with an ether structure obtained by chemically modifying natural cellulose. Due to the poor water solubility of the acid form, the product is generally made into sodium salt, referred to as CMC. Sodium carboxymethyl cellulose is soluble in water, can significantly improve the viscosity of the solution, has the functions of thickening, emulsifying, dispersing, suspending, protecting colloid, etc., and is physiologically harmless, so it is widely used in food, medicine, daily chemical, papermaking, textile and other fields. be widely used. Its molecular unit structure is as follows: [0003] [0004] As early as 1918, German E. Jansen first produced sodium carboxymethyl cellulose, which was patented in 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/0534A23L2/62A23L29/262
Inventor 丁长光朱宏彬袁和平丁长银张强聂熙金
Owner 上海长光企业发展有限公司
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