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Bamboo pulp denatured productive technology

A production process, bamboo pulp technology, applied in the field of bamboo fiber viscose pulp production process, can solve the problems of poor reaction performance, environmental pollution, low cellulose percentage content, etc., and achieve the effect of reducing the discharge of production wastewater

Inactive Publication Date: 2002-12-18
上海第五化学纤维厂
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Problems solved by technology

[0002] Pulp is divided into two types: soluble and insoluble. Most of the existing bamboo pulp products are insoluble pulp with high degree of polymerization (DP>1000). It can be used in papermaking; while the soluble viscose bamboo pulp adopts the one-step kraft cooking process, which has the following technical defects: (1) poor reaction performance; (2) poor spinnability, it needs to be blended with cotton pulp Viscose spinning (i.e. mixed spinning); (3) poor fiber strength after viscose spinning; (4) serious environmental pollution, which is not conducive to the sustainable development of pulp production in large cities

Method used

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  • Bamboo pulp denatured productive technology

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[0024] As shown in the figure, the process flow chart of the present invention, the specific process is by: 1, alkali pre-impregnation; 2, secondary cooking; Bleaching and washing materials; 7. Bleaching; 8. Acid treatment and washing materials; 9. Post-sand removal and concentration; 10. Copying. in:

[0025] 1. Alkali pre-impregnation, the insoluble bamboo pulp products are opened and removed by the cotton opener, and then fed to the screw press after cyclone separation and alkali spraying to squeeze the insoluble bamboo pulp fibers after crushing and alkali pre-impregnation Penetration is to prepare for improving the purity of cellulose A and reducing the degree of polymerization in the denatured production of bamboo pulp, and to lay the foundation for the cooking uniformity of the second cooking.

[0026] Main technical parameters: the amount of alkali (NaOH) used is 19-26%, the bath ratio is 1:3.75-1:3.90, and the temperature of feeding into the steaming ball is ≥80°C. ...

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Abstract

The production process of bamboo fibre viscose pulp includes the following main steps: pre-alkalizing, secondary cooking, plate (belt) type washing and bleaching, and is characterized by mixing insoluble bamboo pulp undergo the process of modification treatment to produce soluble viscose bamboo pulp. As compared with cotton pulp production process it can reduce discharge of waste water by 35%, and is approaching to or superior to cotton pulp in quality.

Description

technical field [0001] The bamboo pulp denatured production process of the invention relates to a bamboo fiber viscose pulp production process. Background technique [0002] Pulp is divided into two types: soluble and insoluble. Most of the existing bamboo pulp products are insoluble pulp with high degree of polymerization (DP>1000). It can be used in papermaking; while the soluble viscose bamboo pulp adopts the one-step kraft cooking process, which has the following technical defects: (1) poor reaction performance; (2) poor spinnability, it needs to be blended with cotton pulp Carry out viscose spinning (being mixed spinning); (3) fiber strength is poor after viscose becomes silk; (4) serious environmental pollution is unfavorable for the sustainable development of pulp production in big cities. Contents of the invention [0003] The purpose of the present invention is to provide a process for producing soluble viscose pure bamboo fiber pulp through denaturation of in...

Claims

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Application Information

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IPC IPC(8): B27K3/00B27K5/00D21B1/02D21C1/06D21C3/02
Inventor 沈望浩郑明伟孙金莲陈建中宋才根江兴兰夏重光方顺荣陶杰荣
Owner 上海第五化学纤维厂
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