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Wood pulp denaturalization production process for producing viscose fibers

A production process and technology of viscose fiber, applied in pulping of cellulose raw materials, pulping with inorganic alkali, fiber raw material treatment, etc., can solve the problems of serious environmental pollution, poor reactivity, low methyl fiber, etc., and reach the goal of chemical medicine The effect of low consumption, excellent silk quality and high content of methyl fiber

Inactive Publication Date: 2013-02-27
SWAN FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of this technology are: the produced product has low methyl fiber, poor reaction performance and poor spinnability, and it needs to be blended with cotton pulp to carry out viscose spinning; the energy consumption is large; the process has serious environmental pollution, It is not conducive to the sustainable development of pulp production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1, each ball is loaded with 5.8 tons, the paddle board is crushed with a crusher and pre-soaked with hot alkali (10% of alkali (NaOH), bath ratio 1:3.5-1:4 (refers to the absolute dryness of the ball) The ratio of wood pulp to the total amount of cooking liquid, the same below), the feeding temperature of the steaming ball is ≥80℃, after the feeding is completed, the temperature is heated to 120℃, and the immersion is 30 minutes. The function is to strengthen the alkali impregnation, and the other is equivalent to hot alkali Refining is used to dissolve lignin and colored substances, while reducing the content of hemicellulose and low-molecular carbohydrates to increase the content of methylcellulose.) After filling the steaming ball and heating it to 120°C, immersing for 30 minutes, open the lid and add alkali Add sulfonate 1.75% to the liquid (16% of alkali used for cooking, bath ratio 1:3.5.) After high temperature cooking, the total heating time is 2 hours, 3 ...

Embodiment 2

[0046] Example 2, the amount of alkali used for cooking is 19%, and the bath ratio is 1:3.6. Steaming DP 557, methylcellulose 94.3 enzyme treatment process PH=8, temperature 47 degrees, reaction time 2 hours. The amount of enzyme is 63 grams. The result is that the methyl fiber content is 95. The bleaching process parameters are 0.12% for halogen use, 0.84% ​​acid ratio, alkali content 20g / m3, whiteness 82, and methyl fiber 95.1.

Embodiment 3

[0047] Example 3, the amount of alkali used for cooking is 22%, and the bath ratio is 1:4. Cooking DP 550, methylcellulose 94.2 enzyme treatment process PH=7 temperature 50 degrees reaction time 2 enzyme dosage 80 grams processing result methylcellulose content 95.6 bleaching process parameters brine ratio 0.15%, acid ratio 0.9%, alkali content 30g / m3, white Degree 83, nail fiber 95.7.

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Abstract

A wood pulp denaturalization production process for producing viscose fibers is used for solving the problems of high energy consumption, serious pollution, low alpha cellulose content of produced products, poor reactivity and the like of an existing method. The wood pulp denaturalization production process includes the working procedures of wood pulping, repulping, alkali pre-impregnation, cooking, desanding by washing, xylanase treatment, seeping and rinsing, acid treatment, pulp washing and manufacturing paper with pulp. In the working procedure of cooking, 16-22% of alkali is used, 1.75% of additive sulfonate, and the bath ratio is 1:3.5-4. In the working procedure of xylanase treatment, the PH (potential of hydrogen) value is lower than 9, the temperature is 50 DEG C, enzyme is diluted to be 0.125%, reaction time is 1.5-2 hours, the concentration of the pulp is 5-8%, and the dosage of the enzyme is 45-80 grams / ton. The pulp is purified by combining chemical treatment with biological treatment, and compared with a pure chemical method, the process has the advantages that the produced wood pulp is high in alpha cellulose content, the dosage of chemical agents is low, and pollution is less.

Description

Technical field [0001] The invention relates to a method for manufacturing textile raw materials, in particular to a wood pulp modification production process for producing viscose fibers, and belongs to the technical field of textiles. Background technique [0002] Cotton pulp is the raw material for the production of viscose fiber. Based on the current situation that the shortage of cotton pulp restricts the production of viscose fiber, the use of wood pulp board as the raw material for the production of viscose fiber is an urgent problem for people in the industry. The existing technology is to use traditional cotton pulp production technology to produce wood pulp. However, because viscose fiber requires high purity of pulp (high formaldehyde fiber, low ash and iron content), wood pulp products are mostly insoluble pulp Compared with cotton linter, wood pulp has high content of lignin hemicellulose and low content of methylcellulose, and second, it is difficult to remove ligni...

Claims

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Application Information

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IPC IPC(8): D21C3/02D21C3/22D21C5/00D21C9/14D01F2/06
Inventor 杨启平刘云峰田文智张兆友
Owner SWAN FIBER
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