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Method for improving ultrafiltration membrane flux of wood acidizing fluid

A technology of acidifying liquid and ultrafiltration membrane, applied in the production of sugar, xylose, sugar production, etc., can solve the problems of affecting the flux of ultrafiltration membrane, affecting product yield, increasing equipment investment, etc. Obstruction, easy operation, the effect of improving the flux

Inactive Publication Date: 2017-09-01
四川绿沃创新环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the steric barriers of these substance molecules, the flux of the ultrafiltration membrane is affected; thereby increasing the equipment investment and affecting the yield of the product

Method used

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  • Method for improving ultrafiltration membrane flux of wood acidizing fluid
  • Method for improving ultrafiltration membrane flux of wood acidizing fluid
  • Method for improving ultrafiltration membrane flux of wood acidizing fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The method for improving the flux of the ultrafiltration membrane of the wood acidizing liquid of the present invention needs to degrade the wood acidizing liquid. Specifically, a degradation agent is added to the wood acidification solution to degrade the macromolecular substances in the wood acidification solution into small molecular substances, which can reduce the obstruction and improve the flux of the ultrafiltration membrane. The wood acidifying solution of the present invention degrades under acidic conditions, and the initial pH value of the degradation is 3-6, and the degradation initial pH value of the wood acidifying solution in this embodiment is 3.

[0018] The wood acidification solution of the present invention is the hydrolysis and acidification solution of wood, bamboo, bagasse or reed, and the wood acidification solution in this embodiment is eucalyptus hydrolysis and acidification solution. The degradation agent is one or more of peroxidase, laccase...

Embodiment 2

[0023] This example is basically the same as Example 1, except that the wood acidification solution used in this example is bamboo hydrolysis acidification solution, the degradation initial pH value is 4, the degradation time is 4 hours, and the degradation temperature is 65°C . The weight of the degradation agent is 0.06% of the weight of the wood acidification solution, and the degradation agent is a non-ionic surfactant OP-7. The comparison of the monosaccharide aqueous solution after the degradation treatment in this embodiment and the bamboo hydrolysis acidification solution without degradation treatment is shown in Table 2.

[0024]

[0025] Table II

Embodiment 3

[0027] This example is basically the same as Example 1, except that the wood acidification solution used in this example is bagasse hydrolysis acidification solution, the degradation initial pH value is 5, the degradation time is 6 hours, and the degradation temperature is 50°C . The weight of the degrading agent is 0.08% of the weight of the wood acidifying solution, and the degrading agent is composed of sodium lauryl sulphate and pingpingjia. The comparison of the monosaccharide aqueous solution after the degradation treatment in this embodiment and the bamboo hydrolysis acidification solution without degradation treatment is shown in Table 3.

[0028]

[0029] Table three

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Abstract

The invention discloses a method for improving the ultrafiltration membrane flux of wood acidizing fluid. The method is characterized in that a wood acidizing fluid treatment process comprises the following steps that a degradation agent is added into the wood acidizing fluid; the wood acidizing fluid is degraded into a monosaccharide solution, wherein the weight of the added degradation agent accounts for 0.05 to 0.1 percent of the weight of the wood acidizing fluid; the degradation time is 2 to 8h; the degradation temperature is 40 to 80 DEG C. The method has the advantages that the steps are simple; the operation is convenient; the wood acidizing fluid is degraded through the degradation agent, so that macromolecules such as lignin in the wood acidizing fluid are degraded into micromolecules, so that the obstruction is reduced; further, the ultrafiltration membrane flux is improved, so that the method is suitable for being popularized and used.

Description

technical field [0001] The invention relates to a method for increasing the flux of an ultrafiltration membrane, in particular to a method for increasing the flux of an ultrafiltration membrane for wood acidification liquid. Background technique [0002] Raw materials containing plant fibers such as wood, bamboo, etc., are mainly composed of cellulose, hemicellulose, and lignin. Pulping and papermaking consumes a large amount of resources such as plant fiber wood every year. In the process of pulp preparation, hemicellulose and lignin are burned as waste. Therefore, in order to make full use of resources, wood chips are pre-hydrolyzed with water to extract hemicellulose in wood chips. Under a certain temperature and the action of a catalyst, water is added to decompose monosaccharides, and then these monosaccharides are reprocessed by chemical or biochemical methods. into various products so that hemicellulose can be utilized. [0003] The solid phase material obtained by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02C13K13/00
CPCC12P19/02C12P19/14C13K13/002
Inventor 邱全国
Owner 四川绿沃创新环保工程有限公司
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