Enzyme removing and oxygen bleaching combined degumming process for ramie

A technology of ramie enzyme and oxygen bleaching, which is applied in the direction of producing bast fiber by chemical method, can solve the problems of cumbersome degumming method, high energy consumption, long degumming cycle, etc., and achieve good degumming effect, low cost and reduced damage

Inactive Publication Date: 2020-08-14
SICHUAN JB RAMIE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned technical scheme, the entire degumming method is cumbersome to operate, the degumming cycle is long, and the energy consumption is high

Method used

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  • Enzyme removing and oxygen bleaching combined degumming process for ramie

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of ramie enzyme de-oxygen bleaching combined degumming process, comprises the steps:

[0036] S1 chops and cuts the bast of the root of raw hemp, puts the original hemp into the first soaking liquid and soaks it, puts it into a softening machine after soaking for mechanical processing; the first soaking liquid is an aqueous ethanol solution with a mass fraction of 18%, and the ratio of solid to liquid is 1: 10. The soaking temperature is 50°C, and the soaking time is 12 minutes.

[0037] S2 Add the softened raw hemp in S1 to the acidic enzyme preparation solution for soaking; use oxalic acid to adjust the pH to 4.0-5.0, the ratio of solid to liquid is 1:8, the soaking time is 12 hours, and the soaking temperature is 50°C. Based on the weight percentage of raw hemp, the acid enzyme preparation includes 1.5% compound enzyme and 0.2% degumming aid. The ratio of each component of the acid enzyme preparation is acid pectinase:acid ligninase=1:1:2, and the degumming a...

Embodiment 2

[0041] Compared with Example 1, the present embodiment differs in that the degumming aid is different.

[0042] In this embodiment, the degumming aid is sodium tripolyphosphate.

Embodiment 3

[0044] Compared with Example 1, the present embodiment differs in that the degumming aid is different.

[0045] In this embodiment, the degumming aid is sodium metasilicate.

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Abstract

The invention discloses an enzyme removing and oxygen bleaching combined degumming process for ramie. The process comprises the following steps that S1, the bast of the root of raw ramie is chopped, and the raw ramie is soaked into a first soaking solution for soaking and then is put into a softening machine for mechanical treatment; S2, the raw ramie after being softened in the step S1 is added to an acid enzyme preparation solution for soaking; S3, the raw ramie soaked in the acid enzyme preparation solution in the step S2 carries out the first washing for the first time, the raw ramie is added into a second soaking solution for soaking after the first washing, and the second washing is performed after the second soaking solution is alkaline and the raw ramie is bleached; and S4, the rawramie after the second washing in the step S3 carries out raw ramie drying treatment to obtain fine dried ramie. In the step S2, the enzyme preparation solution comprises, by weight, 1.5%-3.0% of complex enzyme and 0.2%-1.0% of degumming aids. In the step S3, the second soaking solution includes hydrogen peroxide. According to the process, the ramie is treated by the combination of enzyme removing and oxygen bleaching, so that the debugging effect is good, the process is simple, the cost is low, the amount of an alkali agent is small, and the whiteness of the raw ramie is improved.

Description

technical field [0001] The invention belongs to the technical field of ramie degumming, and in particular relates to a ramie enzyme degumming-oxygen bleaching combined degumming process. Background technique [0002] In the degumming process of ramie, chemical degumming and biological degumming are commonly used. Chemical degumming is to achieve the purpose of degumming through pickling, lye cooking, and chlorine bleaching. However, the pickling process has strict requirements. If it is not properly controlled, it will affect the mechanical strength of the raw hemp fiber, and the acid solution is very corrosive to the equipment; high-temperature cooking consumes a lot of water and energy, and the COD value in the degumming waste liquid is high. Wastewater treatment is difficult; chlorine bleaching has a great impact on the environment. Biological degumming includes microbial degumming and enzymatic degumming. Enzymatic degumming is to directly use degumming enzyme preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C1/02
CPCD01C1/02
Inventor 张小祝别晓东杨继前廖光辉王惠
Owner SICHUAN JB RAMIE
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