Process for manufacturing dissolved pulp by using ethanol, sulfate and acetic acid

A manufacturing process, sulfate technology, applied in the direction of pulping with inorganic alkali, papermaking, paper machine, etc., can solve the problems that cotton and cotton linters cannot meet the demand, the production cost of enterprises is rising, and the price of raw materials is rising, so as to avoid ash High, reduce strong degradation, avoid the effect of insufficient quality

Inactive Publication Date: 2008-04-09
宜宾纸业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the dissolving pulp materials in the fields of textile dissolving pulp, nitrated dissolving pulp, acetic acid dissolving pulp and cellulose ether dissolving pulp are all refined from cotton or cotton linters. With the rapid development of plain ether dissolving pulp and the impact of cotton planting area and other factors, the relationship between supply and demand has been broken. The amount of cotton and cotton linters has been far from meeting the demand. The price of raw materials has risen, and the production cost of enterprises has risen sharply. Economic benefits Severely affected, the development of enterprises is in a downturn

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A process for producing dissolving pulp with ethanol, sulfate, and acetic acid, and the manufacturing process includes material cutting, screening and ash removal, material washing, ethanol extraction, sulfate cooking, slurry separation, washing and purification, chlorination treatment, and alkali treatment in sequence , acetic acid bleaching + H 2 o 2 Oxidative organic bleaching, acid complexing treatment, papermaking, the specific steps are:

[0030] A. Raw material cutting: cutting the raw material; the raw material can be bamboo, wood, mulberry, asparagus;

[0031] B. Screening and ash removal: Screen the raw materials after cutting to remove ash and chips;

[0032] C, washing materials: washing the raw materials obtained in step B to remove dust;

[0033] D, ethanol extraction: the raw material of step C is treated with 30% ethanol, whose volume ratio is raw material ratio ethanol 1: 1, carries out 10min ethanol cooking extraction treatment under the condition o...

Embodiment 2

[0047] The process of producing dissolving pulp with ethanol, sulfate, and acetic acid is characterized in that: the manufacturing process sequentially includes material cutting, screening and ash removal, material washing, ethanol extraction, sulfate cooking, slurry separation, washing and purification, and chlorination. treatment, alkali treatment, acetic acid bleaching + H 2 o 2 Oxidative organic bleaching, acid complexing treatment, papermaking, the specific steps are:

[0048] A. Raw material cutting: cutting the raw material; the raw material can be bamboo, wood, mulberry, asparagus;

[0049] B. Screening and ash removal: Screen the raw materials after cutting to remove ash and chips;

[0050] C, washing materials: washing the raw materials obtained in step B to remove dust;

[0051] D, ethanol extraction: the raw material of step C is treated with 98% ethanol, whose volume ratio is raw material ratio ethanol 1: 10, carries out 130min ethanol cooking extraction treatm...

Embodiment 3

[0065] The process of producing dissolving pulp with ethanol, sulfate, and acetic acid is characterized in that: the manufacturing process sequentially includes material cutting, screening and ash removal, material washing, ethanol extraction, sulfate cooking, slurry separation, washing and purification, and chlorination. treatment, alkali treatment, acetic acid bleaching + H 2 o 2 Oxidative organic bleaching, acid complexing treatment, papermaking, the specific steps are:

[0066] A. Raw material cutting: cutting the raw material; the raw material can be bamboo, wood, mulberry, asparagus;

[0067] B. Screening and ash removal: Screen the raw materials after cutting to remove ash and chips;

[0068] C, washing materials: washing the raw materials obtained in step B to remove dust;

[0069] D, ethanol extraction: the raw material of C step is treated with the ethanol that contains 30~98%, its volume ratio is that raw material ratio ethanol is 1:8, carries out 90min ethanol c...

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PUM

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Abstract

The invention discloses a technique of making dissolving pulp by ethanol, sulfate and acetic acid. The manufacturing technique sequentially comprises cropping, screening and removing ashes, washing, ethanol extraction, sulfate cooking, pulp separation, scrubbing purification, chlorination treatment, alkali treatment, acetic acid bleaching +H2O2 oxidation organic bleaching, acid complex treatment and runnability. The invention effectively shortens production process, enhances production efficiency of producing dissolving pulp by using bamboo, wood, a masson pine, a ramulus mori and a Chinese alpine rush; the dissolving pulp can be used in the field of textile dissolving pulp, nitration dissolving pulp, acetic acid dissolving pulp and cellulose dissolving pulp, at the same time the invention enhances harvesting rate of making dissolving pulp by the bamboo, the wood, the masson pine, the ramulus mori and the Chinese alpine rush.

Description

technical field [0001] The invention relates to a manufacturing process of dissolving pulp, and mainly relates to a process of manufacturing dissolving pulp by using ethanol, sulfate and acetic acid. Background technique [0002] Due to the rapid development of society and the continuous improvement of people's living standards, the consumption growth of social resources has been far greater than the natural growth rate of resources, which cannot meet the needs of sustainable development of society, especially in the fields of viscose, cellulose and nitrification production in the textile industry. Raw materials are currently scarce. At present, the dissolving pulp materials in the fields of textile dissolving pulp, nitrated dissolving pulp, acetic acid dissolving pulp and cellulose ether dissolving pulp are all refined from cotton or cotton linters. With the rapid development of plain ether dissolving pulp and the impact of cotton planting area and other factors, the relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/04D21C1/00D21C7/00D21C3/02D21C9/16D21F13/00
Inventor 罗云王晓华易从梁好李云川黄正文
Owner 宜宾纸业股份有限公司
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