Bamboo fiber dissolving pulp and production technology thereof

A production process and dissolving pulp technology, which is applied in the fields of cellulose raw material pulping, fiber raw material treatment, pulping with inorganic alkali, etc., can solve the problems of increasing the production cost of enterprises using dissolving pulp, restricting the development initiative of enterprises, and achieving α - High cellulose content, light environmental pollution, and uniform polymerization degree

Inactive Publication Date: 2013-03-20
四川银鸽竹浆纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly increases the production cost of enterprises using dissolving pulp and limits the initiative of enterprises to develop

Method used

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0028] An embodiment of a production process of bamboo fiber dissolving pulp, comprising the following steps,

[0029] The selection of step A, bamboo raw material;

[0030] Step B, bamboo material preparation, the selected bamboo is cut into bamboo slices, then the bamboo slices are screened to remove oversized long bamboo slices and too small bamboo chips;

[0031] Step C, pre-hydrolysis of bamboo chips, the pre-hydrolysis of bamboo chips is carried out in a closed reactor by selecting one of steaming, poaching or acid boiling process, for removing the polypentose in the bamboo chips;

[0032] Step D, sulfate replacement cooking, putting the bamboo chips obtained in C into a closed reactor, adding a cooking liquid comprising water, caustic soda, sodium sulfide and a cooking accelerator for cooking;

[0...

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Abstract

The invention discloses bamboo fiber dissolving pulp and a production technology thereof. Bamboo is used as a material in production by using the technology, and the technology adopts the following production procedures of: preparing bamboo wood, hydrolyzing bamboo sheets in advance, performing displacement cooking of sulfate, washing and dressing in a sealing way, performing ECF (extracellular fluid) bleaching and refining, and papermaking by pulp. The displacement cooking and the ECF bleaching are used for producing the bamboo fiber dissolving pulp; a product is good in quality, high in yield, high in alpha-cellulose content, low in pentosan content, few in ashes and impurities, and even in viscosity, good in reacting property, high in whiteness, and not easy to yellow. The production of subsequent procedures is facilitated; and the bamboo fiber dissolving pulp is bleached by ClO2 without chlorine element, and the damage to the environment can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of pulping technology, in particular to a bamboo fiber dissolving pulp and a production technology thereof. Background technique [0002] Dissolving pulp, also called pulp, is a kind of refined pulp with high purity (-cellulose content above 95%). Dissolving pulp is the main raw material for the industrial preparation of cellulose and its derivatives, and can be used to produce viscose rayon, nitrocellulose, cellulose acetate, cellophane, carboxymethyl cellulose and other products. The traditional raw materials for the production of dissolving pulp are coniferous wood and cotton linters. However, due to insufficient supply of domestic wood resources, and cotton linters have more important uses, for a long time, domestic dissolving pulp has mainly relied on imports. The largest amount of dissolving pulp is in the preparation of viscose fibers to produce rayon, which is used as a textile material. With the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21C3/02D21C3/22
Inventor 王纪超于渭东王修朋罗江奇刘保周刘一山
Owner 四川银鸽竹浆纸业有限公司
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