Preparation method of instant sodium carboxymethyl cellulose

A technology of sodium carboxymethyl cellulose and cellulose, applied in the field of preparation of instant sodium carboxymethyl cellulose, can solve the problems of high cost, low yield and viscosity, poor substitution uniformity and the like

Inactive Publication Date: 2021-04-20
江苏派克斯特纤维素有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Sodium carboxymethyl cellulose is an organic substance with the chemical formula [C6H7O2(OH)2OCH2COONa]n. It is a carboxymethylated derivative of cellulose and the most important ionic cellulose gum. Sodium carboxymethyl cellulose is usually It is an anionic polymer compound prepared by reacting natural cellulose with caustic alkali and monochloroacetic acid. The molecular weight ranges from several thousand to millions. With the rapid development of

Method used

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Embodiment Construction

[0019]The technical solutions in the embodiments of the present invention will be apparent from the embodiments of the present invention, and embodiments, are intended, as described in FIG. Based on the embodiments of the present invention, there are all other embodiments obtained without making creative labor without making creative labor premises.

[0020]The present invention provides a technical solution: a method of preparing an instant carboxymethylcellulose sodium, and the process is a raw cotton fiber prepared → alkalization reaction → etherified reaction → neutralization with washing → drying treatment, specifically includes the following steps :

[0021]S1, put the cotton passed through the 沤 沤, cut into 10-20 cm long, then heat it, acid treatment, bleaching and dehydration, resulting in raw cotton fibers;

[0022]S2, alkalization reaction, adding ethanol and sodium hydroxide to the kneading machine, mix uniform, then adding the raw coil, stirring, alkalized cellulose;

[0023]S3, eth...

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PUM

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Abstract

The invention discloses a preparation method of instant sodium carboxymethyl cellulose, and the method comprises the following steps: retting, beating and loosening cotton, and carrying out hot washing, acid treatment, bleaching and dehydration to obtain a raw material cotton fiber; adding ethanol and sodium hydroxide into a kneading machine, performing uniform mixing, adding the raw material cotton fiber, and performing stirring to obtain alkalized cellulose; carrying out etherification reaction on the alkalized cellulose obtained in the step S2 and monochloroacetic acid to obtain a sodium carboxymethyl cellulose crude product; performing neutralizing and washing: neutralizing the sodium carboxymethyl cellulose crude product obtained in the step S3 by using an aqueous solution of alcohol containing acetic acid, performing washing by using alcohol, and performing filtering to obtain a solid substance; performing drying treatment: drying the solid substance obtained in the step S4, and performing sieving treatment to obtain a sodium carboxymethyl cellulose finished product. Cotton fibers which are rich in resource and low in price are used as raw materials, the quality of the cotton fibers is improved, high-temperature and high-pressure production is not needed, energy consumption is low, and the prepared product is good in stability, long in shelf life and excellent in quality.

Description

Technical field[0001]The present invention relates to the field of carboxymethylcellulose sodium, in particular a method of preparing an instant carboxymethylcellulose.Background technique[0002]Sodium carboxymethylcellulose is an organic substance, a chemical formula [C6H7O2 (OH) 2OCH2COONA] N, is a carboxymethylated derivative of cellulose, is the most important ionic cellulose gel, sodium carboxymethylcellulose. It is an anionic polymer compound obtained by natural cellulose and caustic, and a chloric acid reaction, the molecular weight is from several thousand to million, with the rapid development of the national economy, and the increasing economic globalization China's cellulose ether production industry faces a huge challenge. At present, most of the production of carboxymethylcellulose sodium has high cost, low yield and low volume, poor uniformity, low dissolution rate and low degree of dissolution, for this purpose A preparation method of an instant carboxymethylcellulose ...

Claims

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Application Information

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IPC IPC(8): C08B11/12C08B11/22
Inventor 张文会
Owner 江苏派克斯特纤维素有限公司
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