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Process for preparing dissolved pulp by oxidative decomposition of paper pulp

A technology for dissolving pulp and paper pulp, which is applied in the fields of spinning solution preparation, textile and papermaking, pulping with inorganic alkali, etc. It can solve the problems of resource shortage, low yield, long cycle, etc., to improve the pulping yield and reduce the Pollution, the effect of shortening the pulping cycle

Inactive Publication Date: 2008-10-22
宜宾长毅浆粕有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of serious pollution, low yield, long cycle and shortage of resources in the traditional dissolving pulp preparation process, and propose a method for preparing dissolving pulp by oxygen decomposition of pulp, so that the above problems can be solved. The invention can increase production speed, improve product quality, save steam consumption, and reduce the generation of pollutants

Method used

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  • Process for preparing dissolved pulp by oxidative decomposition of paper pulp
  • Process for preparing dissolved pulp by oxidative decomposition of paper pulp
  • Process for preparing dissolved pulp by oxidative decomposition of paper pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a. The sample is wood pulp, dry weight 1Kg

[0024] b. Cold alkali impregnation, impregnation alkali concentration: 87g / l

[0025] c. Dipping pulp concentration: 5%

[0026] d. Amount of additives added: 0.2%

[0027] e. Dipping time: 8 minutes

[0028] f. Dehydration with a dehydrator after immersion

[0029] g. Squeeze to adjust the bath ratio to 1:3

[0030] h. Oxygenation oxygen pressure is 0.5Mpa

[0031] i. Oxygen decomposition oxygen pressure is 0.5Mpa

[0032] j. Oxygen decomposition temperature is 48°C

[0033] k, oxygen decomposition time is 100 minutes.

[0034] This embodiment compares with conventional method:

[0035]

Embodiment 2

[0037] a. The sample is bamboo pulp, dry weight 1Kg

[0038] b. Cold alkali impregnation, impregnation alkali concentration: 87g / l

[0039] c. Dipping pulp concentration: 5%

[0040] d. Amount of additives added: 0.2%

[0041] e. Dipping time: 8 minutes

[0042] f. Dehydration with a dehydrator after immersion

[0043] g. Squeeze to adjust the bath ratio to 1:3

[0044] h. Oxygenation oxygen pressure is 0.5Mpa

[0045] i. Oxygen decomposition oxygen pressure is 0.5Mpa

[0046] j. Oxygen decomposition temperature is 50°C

[0047] k, oxygen decomposition time is 60 minutes.

[0048] This embodiment compares with conventional method:

[0049]

Embodiment 3

[0051] a. The sample is wood pulp, dry weight 1Kg

[0052] b. Cold alkali impregnation, impregnation alkali concentration: 110g / l

[0053] c. Dipping pulp concentration: 5%

[0054] d. Amount of additives added: 0.2%

[0055] e. Dipping time: 30 minutes

[0056] f. Dehydration with a dehydrator after immersion

[0057] g. Squeeze to adjust the bath ratio to 1:4

[0058] h. Oxygenation oxygen pressure is 0.4Mpa

[0059] i. Oxygen decomposition oxygen pressure is 0.4Mpa

[0060] j. Oxygen decomposition temperature is 65°C

[0061] k, oxygen decomposition time is 40 minutes.

[0062] This embodiment compares with conventional method:

[0063]

[0064]

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PUM

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Abstract

The invention discloses a method for preparing dissolving pulp through oxide degradation of pulp by adoption of the oxide degradation method so as to solve the problems in the prior dissolving pulp preparation technique of severe pollution, low yield, long period, resource shortage and so on. The method for preparing the dissolving pulp through oxide degradation of the pulp comprises the following processing steps of: alkalizing purification, squeezing preparation of alkali cellulose, oxygenization, and continuous oxide degradation and depolymerization. By adoption of the method, the production speed can be improved; the product quality can be improved; the steam consumption can be saved; and the generation of pollutants can be reduced.

Description

technical field [0001] The invention relates to a production method for preparing dissolving pulp by an oxygen decomposition method, specifically a method for preparing dissolving pulp for viscose fiber production by using an oxygen decomposition method and continuous steaming to prepare pulps such as wood and bamboo. Background technique [0002] The traditional dissolving pulp pulping process is mostly prehydrolysis alkaline cooking and (sulfite) sulphate cooking, which have two major problems of serious pollution and low yield. At the same time, the domestic pulping technology is still at a relatively low production level. Except for the mint pulp factory, which has started to use continuous cooking, the others all use traditional steaming balls for high-temperature, high-alkali gap cooking. Using the traditional alkaline method and steaming ball for batch cooking, the pulping rate is not high, the production scale is small, and the waste steam generated by cooking has a ...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01C1/00D21C3/02
Inventor 邓传东薛勤徐发祥刘爱兵黄俊谢鹏虞良福蒲运龙竭发全
Owner 宜宾长毅浆粕有限责任公司
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