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Cellulose ether super-multi-chain-link purified cotton producing technology

A technology of cellulose ether and production process, which is applied in pulping with inorganic alkali, fiber raw material treatment, textiles and papermaking, etc. It can solve the problems of poor product quality stability and high cellulose production cost, so as to improve stability and reduce production cost effect

Inactive Publication Date: 2013-10-09
TANGSHAN SANYOU GRP DONGGUANG PULP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the defects of high production cost and poor product quality stability of the existing cellulose mentioned in the background technology, and provides a kind of stable ether cellulose On the basis of quality, the production process of refined cotton that can increase the yield of ether cellulose and reduce production costs, specifically, is the production of ultra-multi-chain refined cotton for cellulose ether with more than 2,800 polymer molecular chains craft

Method used

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  • Cellulose ether super-multi-chain-link purified cotton producing technology
  • Cellulose ether super-multi-chain-link purified cotton producing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Raw material preparation: After the cotton linters are opened with a cotton opener, they are put into a dry impurity removal device for further decontamination, dispersion, and purification, and are sent to the cyclone separator by wind, and at the same time, they are sprayed into the Alkali solution with a concentration of 24g / l is fully mixed with cotton linters to complete alkali impregnation, and then extruded and dehydrated by a screw screen drum extruder;

[0020] b. Cooking: Use steaming ball alkali method to cook, send the impregnated slurry into the steaming ball for cooking, ensure that the amount of caustic soda accounts for 9.6% of the dry slurry, the bath ratio is 1:4, the heating time is 90 minutes, and the holding time is 100 minutes , the heat preservation temperature is 130°C, the maximum steam release time is 60 minutes, and the pressure is 0Mpa; the cooked slurry is sent to the slurry storage tank for use;

[0021] c. Pre-bleaching treatment: Pre-b...

Embodiment 2

[0027] a. Material preparation: After the cotton linters are opened and screened by the cotton opener, they enter the dry impurity removal device for further decontamination, dispersion, and purification. The lye of l is fully mixed with it to complete alkali impregnation, and then squeezed and dehydrated by an extruder;

[0028] b. Cooking: Use steaming ball alkali method to cook, send the impregnated slurry into the steaming ball for cooking, ensure that the amount of caustic soda accounts for 8% of the dry slurry, the bath ratio is 1:4, the heating time is 90 minutes, and the holding time is 100 minutes , the heat preservation temperature is 125°C, the maximum steam release time is 60 minutes, and the pressure is 0Mpa; after the cooking is completed, it is sent to the pulp storage tank for use;

[0029] c. Pre-bleaching treatment: Pre-bleaching the cooked pulp, adding 0.7kg / min of liquid chlorine according to the flow meter to ensure that the chlorine content before bleach...

Embodiment 3

[0035] a. Material preparation: After the cotton linters are opened, they enter the dry-type impurity removal device for further decontamination, dispersion, and purification, and the air is sent to the cyclone separator, and at the same time, the lye with a concentration of 18g / l is poured into it and fully mixed. Alkali impregnation is completed, and then squeezed and dehydrated by an extruder;

[0036] b. Cooking: use steaming ball alkaline cooking method, send the impregnated slurry into steaming ball for cooking, ensure that the amount of caustic soda accounts for 7.2% of the absolute dry slurry, the bath ratio is 1:4, the heating time is 90 minutes, and the holding time is 100 minutes , the heat preservation temperature is 120°C, the maximum steam release time is 60 minutes, the pressure is 0Mpa, and it is sent to the slurry storage tank for use;

[0037] c. Pre-bleaching treatment: Pre-bleaching the cooked slurry, adding 0.8kg / min of liquid chlorine according to the flo...

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Abstract

The invention discloses a cellulose ether super-multi-chain-link purified cotton producing technology. The technology comprises the following steps of: material preparing, namely selecting high quality cotton lower piles as raw materials, opening and screening the high quality cotton lower piles in an opener, feeding the treated cotton lower piles into a dry impurity removal device to defiber, disperse and purify, pneumatically feeding the treated cotton lower piles into a cyclone separator, performing alkali steeping in an alkali spraying mode, and feeding the treated cotton lower piles into an extruding machine to extrude and dehydrate; digesting; prebleaching, namely prebleaching a digested sizing agent, and adding liquid chlorine to the sizing agent which is delivered into a prebleaching tank from a sizing agent storage tank, wherein 0.5kg-0.8kg of liquid chlorine is added each minute according to flow, and the chlorine content before prebleaching is 0.05-0.1 g / l; bleaching; and acid treating, thus obtaining a finished product. By virtue of the purified cotton producing technology, the production cost is lowered, the yield of cellulose ether and the stability of cellulose ether product quality are improved, and the development requirements of high-quality and low-cost cellulose ethers are satisfied.

Description

technical field [0001] The invention relates to a production process of refined cotton, in particular to a production process of ultra-multi-chain refined cotton for cellulose ether. Background technique [0002] The production technology and product quality of my country's ether cellulose enterprises have been gradually improved, and the quality requirements for their raw material refined cotton have also been continuously improved. At present, most of the refined cotton used in the production of ether cellulose in my country has an average polymer molecular chain link of less than 2800, and its stability is poor. , pressing and drying finished products. The cellulose products produced by this traditional process not only have unstable product quality, but also have high production costs, which cannot meet the needs of the current cellulose textile product market. Contents of the invention [0003] The purpose of the present invention is to solve the defects of high prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21C5/00
Inventor 陈玉彬姬荣亮曹杰彭立民赵龙锁
Owner TANGSHAN SANYOU GRP DONGGUANG PULP CO LTD
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