Cotton pulp and preparation method thereof, as well as carboxymethylcellulose and preparation method thereof

A technology of carboxymethyl cellulose and cotton pulp, applied in the field of materials, can solve the problems of low quality of cellulose ether derivatives, uneven polymerization degree of products, low reactivity of cotton pulp, etc., and achieve the reduction of crystallinity and consumption The effect of low volume and low consumption
CN105821701AActive Publication Date: 2016-08-03ANHUI SNOW DRAGON FIBER TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI SNOW DRAGON FIBER TECH
Publication Date
2016-08-03

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Abstract

The invention provides a preparation method of cotton pulp. The method comprises the following steps: mixing alkali liquor and cotton linters subjected to impurity removal, and performing continuous boiling, washing, pulping, degritting, primary concentration, chlorine alkalization, bleaching, acid treatment, water washing, degritting, secondary concentration and papermaking, so as to obtain the cotton pulp. The mass ratio of alkali in the alkali liquor to the absolute-dry cotton linters is (13 to 15): 100; the temperature for continuous boiling is 108 to 115 DEG C; the period for continuous boiling is 55 to 65min. According to the method, cotton pulp is prepared through a high alkali content, low temperature and short time continuous coiling mode, materials are uniformly heated in a tube, uniform permeation of alkali liquor is achieved, and the product polymerization degree is uniform; cotton fiber primary walls and secondary walls can be destroyed furthest, so that the degree of crystallinity of cotton pulp fiber is reduced, the amorphous region rises, and the reaction activity of the cotton pulp is improved. Through the adoption of the cotton pulp with high reaction activity, high-quality carboxymethylcellulose can be prepared.
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Description

technical field

[0001] The invention belongs to the technical field of materials, and in particular relates to a cotton pulp and a preparation method thereof, and a carboxymethyl cellulose and a preparation method thereof. Background technique

[0002] Cotton pulp is the main raw material for the production of cellulose ether derivatives. Cotton pulp with high purity, good uniformity of polymerization degree and high reactivity is a necessary condition for the production of high-quality cellulose.

[0003] At present, conventional cotton pulp is intermittently produced by steaming balls, and the cotton linters are turned in the steaming balls by rotating the steaming balls, and the degree of polymerization of the prepared products is not uniform. Moreover, the above-mentioned method for preparing cotton pulp has a high cooking temperature (greater than 130° C.) and a long holding time (greater than 115 minutes), the produced cotton pulp has low reactivity, and the quality o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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