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Method for producing sodium carboxymethyl cellulose (CMC) with low sodium by utilizing ultrasound

A technology of sodium carboxymethyl cellulose and ultrasound, which is applied in the field of ultrasonic production of low-sodium carboxymethyl cellulose sodium, can solve problems such as the influence of solution properties and the decrease of solution viscosity, and achieve increased production efficiency, energy saving in the process, and The effect of simple cleaning and operation of equipment

Inactive Publication Date: 2012-06-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if potassium salt is directly added to CMC, it will have a greater impact on the solution properties of CMC, resulting in a significant drop in solution viscosity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the first step, 65 g of food-grade sodium carboxymethylcellulose (FH6 type, DS=0.62, 1% aqueous solution viscosity (Brookfield) 250 mPa, purity 98.8%) was degassed for 5 minutes under a vacuum of 0.05 MPa, and filled with nitrogen. Add 10% H 2 SO 4 Aqueous solution 1040mL;

[0025] The second step is ultrasonic treatment for 1 minute, the ultrasonic treatment frequency is 15kHz, and the power density is 1.5kW / m 3 , sonicate twice with an interval of 3 minutes, 0.5 minutes each time; keep warm at 10°C for 1 hour, separate, wash the solid with pH=1, 0°C water, and separate to obtain a solid with a water content of 55%;

[0026] The solid obtained in the third step and the second step is carried out under the protection of nitrogen, and the ultrasonic treatment is 0.1 minute, the ultrasonic treatment frequency is 15kHz, and the power density is 0.1kW / m 3 , the reaction temperature is 25°C, adding Na 2 CO 3 85 copies, K 2 CO 3 14 parts, (NH 4 ) 2 CO 3 10.7g of ...

Embodiment 2

[0030] The first step will produce 65g of food-grade sodium carboxymethylcellulose (FH6 type, DS=0.62, 2% aqueous solution viscosity (Brookfield) 50mPa, purity 85.0%) without purification, and a vacuum degree of 0.10MPa is degassed for 20 minutes, Fill with nitrogen, add H with a mass concentration of 40% 2 SO 4 260mL aqueous solution;

[0031] The second step is ultrasonic treatment for 15 minutes, the ultrasonic treatment frequency is 104kHz, and the power density is 0.1kW / m 3 ;Sonicate 3 times with an interval of 1 minute, 5 minutes each time, keep warm at 40°C for 1 hour, separate, wash the solid with pH=3, 30°C water, and separate to obtain a solid with a water content of 65%;

[0032] The solid obtained in the third step and the second step is carried out under the protection of nitrogen, and the ultrasonic treatment is performed for 15 minutes, the ultrasonic treatment frequency is 104kHz, and the power density is 0.1kW / m 3 , the reaction temperature is 35°C, adding ...

Embodiment 3

[0037] The first step is to degas food grade sodium carboxymethylcellulose (FH9 type, DS=1.0, 1% aqueous solution viscosity (Brookfield) 400mPa, purity 98.8%) 40g, vacuum degree 0.05MPa for 10 minutes, fill with argon , adding 15% mass concentration of H 2 SO 4 300mL aqueous solution;

[0038] The second step is ultrasonic treatment for 10 minutes, the ultrasonic treatment frequency is 25kHz, and the power density is 0.5kW / m3 ; Intermittently 1.5 minutes ultrasonic treatment 5 times, each time 2 minutes, 10 ° C for 0.5 hours, separated, the solid was washed with pH = 1, 10 ° C water, separated to obtain a solid with a water content of 60%;

[0039] The solid obtained in the third step and the second step is carried out under the protection of argon, and the ultrasonic treatment is performed for 10 minutes, the ultrasonic treatment frequency is 252kHz, and the power density is 0.25kW / m 3 , the reaction temperature is 30°C, adding Na 2 CO 3 98 copies, K 2 CO 3 1.5 parts, (...

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Abstract

The invention discloses a method for producing sodium carboxymethyl cellulose (CMC) with low sodium by utilizing ultraphonic, comprising the following steps: adding an acid solution into a CMC raw material, and carrying out ultrasonic processing; reacting under the set temperature, separating to remove fractional centrifugation liquid, adding alkai, and carrying out ultrasonic processing; and dewatering, drying and smashing to obtain the product. By the method of the invention, the CMC with low sodium, which has high quality, can be obtained. The invention has the characteristics of energy conservation, time saving, simple and convenient operation, capability of obtaining high-performance product and stable batch quality.

Description

technical field [0001] The invention relates to a method for producing low-sodium carboxymethylcellulose sodium by ultrasound, in particular to a method for producing low-sodium carboxymethylcellulose sodium by ultrasound. Background technique [0002] Sodium carboxymethyl cellulose (CMC) is used as an additive in food. It has multiple functions such as thickening, suspension, emulsification, stabilization, shape retention, film formation, puffing, antiseptic preservation, acid resistance and health care. At the same time, due to the price of CMC It is cheaper than gelatin, agar, sodium alginate and other food glues, so it is widely used in beverages, dairy products, ice cream, soy sauce, jelly, jam, instant noodles and other foods in the modern food industry. The national standard GB2760-2007 lists it as a list of additives that can be used in various foods according to production needs (A3, 53), which means that in food production, CMC can be added in large quantities. Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B11/12
Inventor 叶君熊犍孙润仓
Owner SOUTH CHINA UNIV OF TECH
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