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Method for producing low-sodium sodium carboxymethylcellulose by microwaves

A technology of sodium carboxymethyl cellulose and microwave, applied in the field of microwave production of low sodium carboxymethyl cellulose sodium, can solve problems such as the influence of solution properties and the decrease of solution viscosity.

Inactive Publication Date: 2012-10-31
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

[0023] The first step is to degas 65g of food-grade sodium carboxymethylcellulose (FH6 type, DS=0.62, 1% aqueous solution viscosity (Brookfield) 250mPa, purity 98.8%), degassing for 5 minutes at a vacuum of 0.05 MPa, and fill it with nitrogen. Add 10% H 2 SO 4 Aqueous solution 1040mL;

[0024] Step 2 Microwave treatment for 1 minute, and the power density of microwave treatment is 0.5 kW / m 3 , microwave treatment twice for 3 minutes intermittently, 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%wt;

[0025] The third step The solid obtained in the second step is carried out under the protection of nitrogen, microwave treatment for 0.1 minutes, and the power density of microwave treatment is 0.5 kW / 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 alkali mixture powder composed of 1.5 parts (alka...

Embodiment 2

[0029] The first step is to produce 65g of unpurified food-grade sodium carboxymethylcellulose (FH6 type, DS=0.62, 2% aqueous solution viscosity (Brookfield) 50mPa, purity 85.0%), degassing at a vacuum of 0.10 MPa for 20 minutes, Fill with nitrogen, add H with a mass concentration of 40% 2 SO 4 260mL aqueous solution;

[0030] The second step is microwave treatment for 5 minutes, and the power density of microwave treatment is 0.1kW / m 3 ; Intermittent 1 minute microwave treatment 5 times, 1 minute each time, 40 ° C for 0.5 hours, separated, the solid was washed with water at pH = 3, 30 ° C, separated, and a solid with a water content of 65% was obtained;

[0031] The third step The solid obtained in the second step is carried out under nitrogen protection, microwave treatment for 3 minutes, and the microwave treatment power density is 0.1 kW / m 3 , the reaction temperature is 35°C, adding Na 2 CO 3 85 copies, K 2 CO 3 14 parts, (NH 4 ) 2 CO 3 9.5g of alkali mixture...

Embodiment 3

[0035] The first step is to degas 40g of food-grade sodium carboxymethylcellulose (FH9 type, DS=1.0, 1% aqueous solution viscosity (Brookfield) 400mPa, purity 98.8%), degas for 10 minutes under a vacuum of 0.05 MPa, and fill it with argon , adding 15% mass concentration of H 2 SO 4 300mL aqueous solution;

[0036] The second step is to microwave for 4 minutes, and the power density of microwave treatment is 0.25 kW / m3 ; Intermittent 1.5 minutes microwave treatment 4 times, each time 1 minute, 10 ° C for 1 hour, separated, the solid was washed with pH = 1, 10 ° C water, separated to obtain a solid with a water content of 60%;

[0037] The third step The solid obtained in the second step is carried out under the protection of argon, microwave treatment for 2 minutes, and the microwave treatment power density is 0.25 kW / m 3 , the reaction temperature is 30°C, adding Na 2 CO 3 98 copies, K 2 CO 3 1.5 parts, (NH 4 ) 2 CO 3 8.7g of alkali mixture powder composed of 0.5 p...

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Abstract

The invention discloses a method for producing low-sodium sodium carboxymethylcellulose by microwaves. The method comprises the following steps of: puffing a raw material, adding acid solution, processing by microwaves, reacting at a certain temperature, separating to remove centrifugate, adding alkali, processing by microwaves, dehydrating, drying and crushing to obtain a product. By the method,the high-quality low-sodium sodium carboxymethylcellulose can be obtained. The method is energy-saving, time-saving and easy and convenient to operate, and the obtained product has the characteristics of high performance and stable quality among batches.

Description

technical field [0001] The invention relates to a production method of low-sodium carboxymethylcellulose sodium, in particular to a method in which microwaves are used to produce low-sodium carboxymethylcellulose sodium. 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. Howe...

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