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Compound enzyme degumming agent and degumming method

A compound enzyme degumming agent and degumming agent technology, which is applied in the field of compound enzyme degumming agent and degumming, can solve the problems of high cost and chemical pollution, achieve the effects of less by-products, high fiber production rate, and improved activity and stability

Active Publication Date: 2020-06-16
SICHUAN JB RAMIE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of biological degumming is relatively high; while chemical degumming and bio-chemical combined degumming will use a large amount of chemical reagents, which is likely to cause chemical pollution

Method used

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  • Compound enzyme degumming agent and degumming method
  • Compound enzyme degumming agent and degumming method

Examples

Experimental program
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Embodiment 1

[0026] This embodiment provides a modified laccase: (1) Add 2,3-dimercaptopropanol and 1-ethyl-(3-dimethylaminopropyl) carbodiimide sequentially to the laccase aqueous solution Hydrochloride and the first formamidine acetate aqueous solution are reacted and dialyzed to obtain carboxyl-modified laccase; wherein, laccase, 2,3-dimercaptopropanol, 1-ethyl-(3-dimethylaminopropyl ) The mass ratio of carbodiimide hydrochloride and the formamidine acetate in the first formamidine acetate aqueous solution is: 1:0.02:0.05:0.13; the control reaction time is 62min, and the control reaction temperature is 45°C; (2) to N,N'-carboxydiimidazole and second formamidine acetate are sequentially added to the carboxyl-modified laccase for reaction followed by dialysis to obtain the modified laccase; wherein, N,N'-carboxydiimidazole and the second formamidine acetate The mass ratio of formamidine acetate in the aqueous solution is: 1:0.07:0.13; the reaction time is controlled to be 70 min, and the ...

Embodiment 2

[0028] This embodiment provides a modified laccase: (1) Add 2,3-dimercaptopropanol and 1-ethyl-(3-dimethylaminopropyl) carbodiimide in sequence to the laccase aqueous solution Hydrochloride and the first formamidine acetate aqueous solution are reacted and dialyzed to obtain carboxyl-modified laccase; wherein, laccase, 2,3-dimercaptopropanol, 1-ethyl-(3-dimethylaminopropyl ) The mass ratio of carbodiimide hydrochloride and the formamidine acetate in the first formamidine acetate aqueous solution is: 1:0.04:0.08:0.15; the control reaction time is 84min, and the control reaction temperature is 52°C; (2) to N,N'-carboxydiimidazole and second formamidine acetate are sequentially added to the carboxyl-modified laccase for reaction followed by dialysis to obtain the modified laccase; wherein, N,N'-carboxydiimidazole and the second formamidine acetate The mass ratio of formamidine acetate in the aqueous solution is: 1:0.09:0.15; the reaction time is controlled to be 88 minutes, and t...

Embodiment 3

[0030] This embodiment provides a modified laccase: (1) Add 2,3-dimercaptopropanol and 1-ethyl-(3-dimethylaminopropyl) carbodiimide sequentially to the laccase aqueous solution Hydrochloride and the first formamidine acetate aqueous solution are reacted and dialyzed to obtain carboxyl-modified laccase; wherein, laccase, 2,3-dimercaptopropanol, 1-ethyl-(3-dimethylaminopropyl ) The mass ratio of carbodiimide hydrochloride and the formamidine acetate in the first formamidine acetate aqueous solution is: 1:0.03:0.07:0.14; the control reaction time is 78min, and the control reaction temperature is 48°C; (2) to N,N'-carboxydiimidazole and second formamidine acetate are sequentially added to carboxyl-modified laccase for reaction followed by dialysis to obtain modified laccase; wherein, N,N'-carboxydiimidazole and second formamidine acetate The mass ratio of formamidine acetate in the aqueous solution is: 1:0.08:0.14; the reaction time is controlled to be 80 min, and the reaction tempe...

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Abstract

The invention belongs to the technical field of ramie degumming, and provides a compound enzyme degumming agent and a degumming method. The raw materials of the compound enzyme degumming agent includeprotopectinase, polygalacturonase, polygalacturonate lyase, pectin esterase and modified laccase. The compound enzyme is stable and has excellent degumming properties. The degumming method comprisesthe following steps: adding titanium dioxide, 30% hydrogen peroxide and an acetic acid buffer to the compound enzyme degumming agent to obtain a mixed solution; and placing the mixed solution in a closed box, providing ultraviolet radiation, immersing the raw ramie in the mixed solution, and performing stirring. The degumming effect of the degumming method is excellent; the fine dried ramie afterdegumming has excellent mechanical properties; the fiber production rate is high; and by-products are few.

Description

technical field [0001] The invention belongs to the technical field of ramie degumming, and in particular relates to a compound enzyme degumming agent and a degumming method. Background technique [0002] Ramie degumming refers to the process of removing gum from ramie raw hemp to produce ramie fiber. The length, fineness, and strength of ramie single fibers have met the requirements of spinning, but the fibers are glued together by glue in the raw hemp, and full degumming is required. Colloids in ramie mainly include pectin, hemicellulose, and lignin. In recent years, the research on the use of compound enzyme degumming has become more popular. Compound enzymes mostly include pectinase, hemicellulase and ligninase. [0003] Among them, ligninase can degrade the solid lignin barrier in the intercellular layer and decompose the fibers. Only when the fibers are decomposed can the pectin and hemicellulose be better degraded. Laccase is one of the ligninases. Laccases are f...

Claims

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Application Information

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IPC IPC(8): D01C1/02
CPCD01C1/02
Inventor 张小祝别晓东王惠廖光辉杨继前
Owner SICHUAN JB RAMIE
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