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A method for transforming and reusing old cotton

A technology of old cotton and cotton, which is applied in the field of regeneration and utilization of old cotton, can solve the problems of poor cotton quality, large environmental pollution, and low fiber index, and achieve the effect of less impurities, high fiber index, and good fiber

Inactive Publication Date: 2015-09-09
徐奎元 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Now the recycling of old cotton usually adopts the method of chemical degumming. This treatment method consumes a lot of water, the treatment cost is high, and the acid-base content in the discharged wastewater is high, which causes great environmental pollution.
The quality of the processed cotton is not high, such as low fiber index, poor elasticity, many impurities, many white spots and other defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Production of non-woven fabrics from used cotton

[0024] First prepare an acid soaking solution, calculated according to the treatment of one ton of old cotton, the dosage of acid degreasing enzyme, bleaching enzyme and bactericide are 0.5kg, 0.3kg, 4kg respectively, add inorganic acid to make the pH value of the acid soaking solution 3, put the cotton Put into the prepared acid soaking liquid, the bath ratio of cotton and acid soaking liquid is 1:10, and soak at room temperature for 20 hours. After rinsing, then prepare alkaline soaking solution. Calculated by treating one ton of old cotton, the dosages of lignase, degumming enzyme and hemicellulase are 0.3kg, 0.5kg and 0.3kg respectively. Penetrating agent, degumming agent, cleaning agent The dosage of agent and decolorizing agent are 4kg, 4kg, 7kg and 3kg respectively, the dosage of caustic soda is 30 grams per liter of alkaline soaking solution, and the cotton is put into the prepared alkaline soaking solution. Th...

Embodiment 2

[0027] Using old cotton to produce spinning thread for weaving, quilt

[0028] First prepare an acid soaking solution, calculated on the basis of treating one ton of old cotton, the dosages of acid medium temperature degreasing enzyme, bleaching enzyme and bactericide are 0.3kg, 0.4kg, 5kg respectively, add inorganic acid to make the pH value of the acid soaking solution 4, put the cotton Put into the prepared acid soaking solution, the bath ratio of cotton and acid soaking solution is 1:10, and soak for 2 hours at 40°C. After rinsing and cleaning, prepare alkaline soaking solution. Calculated by treating one ton of old cotton, the dosages of lignase, degumming enzyme and hemicellulase are 0.5kg, 0.6kg and 0.3kg respectively. Penetrating agent, degumming agent, cleaning agent The consumption of the agent is respectively 4kg, 5kg, 7kg, and the consumption of caustic soda is that every liter of alkaline soaking liquid uses 50 grams, and cotton is put into the prepared alkaline s...

Embodiment 3

[0031] Production of rayon pulp from used cotton

[0032] First prepare an acid soaking solution, calculated on the basis of treating one ton of old cotton, the dosages of acid medium temperature degreasing enzyme, bleaching enzyme and bactericide are 0.5kg, 0.3kg, 7kg respectively, add inorganic acid to make the pH value of the acid soaking solution 4, put the cotton Put into the prepared acid soaking solution, the bath ratio of cotton and acid soaking solution is 1:10, and soak for 2 hours at 55°C. After rinsing, prepare an alkaline soaking solution, and calculate the amount of ligninase, degumming enzyme, and hemicellulase, respectively, 0.25kg, 0.45kg, 0.25kg, penetrating agent, degumming agent, and cleaning agent. The consumption of agent is respectively 3kg, 4kg, 7kg, the consumption of caustic soda is that every liter of alkaline soaking liquid uses 30 grams, and cotton is put into prepared alkaline soaking liquid, and the bath ratio of cotton and alkaline soaking liqui...

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PUM

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Abstract

The invention relates to a method for transforming and recycling old cotton. The method comprises the following steps of: after soaking the old cotton in an acid soak solution prepared from acid complex enzyme, a surfactant and inorganic acid, rinsing the old cotton; then soaking the old cotton in an alkaline soak solution prepared from alkaline complex enzyme, the surfactant and caustic soda; and finally, carrying out rinsing and cooking, cleaning, chlorination blenching, dechlorination, acid washing and drying. Compared with a chemical degumming treatment method, a biological degumming method adopted by the invention has the advantage of saving water by 30 percent, so that the consumption of the water resources is reduced; the acid content and the alkali content of discharged waste water are greatly reduced, so that the environment pollution is low and the treatment cost is reduced at the same time; compared with cotton processed with the chemical degumming method, the cotton processed with the method disclosed by the invention has the advantages of good fibers, strong elasticity, high fiber index, few impurities, few white points, good softness and color, high whiteness and the like.

Description

(1) Technical field [0001] The invention relates to a method for transforming and recycling old cotton. (2) Background technology [0002] At present, chemical degumming is usually used for the recycling of old cotton. This treatment method consumes a lot of water, has a high treatment cost, and has a high acid-base content in the discharged wastewater, which causes great environmental pollution. The quality of the cotton obtained by the treatment is not high, such as low fiber index, poor elasticity, many impurities, and many white spots. (3) Contents of the invention [0003] The purpose of the present invention is to provide a method for renovating and reusing old cotton with low processing cost, little environmental pollution, and good quality of the treated cotton. [0004] The present invention is realized in this way: [0005] The method includes the following steps: [0006] A. First, soak the old cotton in an acid soaking solution prepared from an acid compound...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/14D01C1/00
Inventor 徐奎元徐相春
Owner 徐奎元
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