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Enzyme preparation for degumming fresh ramie and its preparation method and method for degumming fresh ramie

An enzyme preparation and ramie technology, which is applied in the chemical post-treatment of fibers, textiles and papermaking, fiber treatment, etc., can solve the problems of inability to realize industrial production, high technical requirements for operators, unevenness, etc.

Active Publication Date: 2015-11-25
SHANGHAI KDN BIOTECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first method in the prior art is the most primitive ramie degumming method, the degumming time is long, the process condition control is difficult, the degumming quality is not high, and it is not uniform, and it is impossible to realize large-scale industrial production; and the second method can only use In ramie raw hemp, it cannot be directly used in ramie fresh hemp, because the chemical oxygen content (COD) and inorganic particles in the chemically degummed wastewater will pollute the environment, and the ramie primary fibers obtained by chemical degumming are not uniform; For degumming, it takes a long time for biological bacteria to generate biological enzymes, and when biological bacteria are used for degumming, the metabolites of biological bacteria and small molecules released when generating biological enzymes will cause the increase of COD in the production wastewater, and the cultivation conditions of biological bacteria Strict, high technical requirements for operators, difficult to implement in the field, if inactivation is not performed or inactivated improperly, it is easy to cause secondary pollution

Method used

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  • Enzyme preparation for degumming fresh ramie and its preparation method and method for degumming fresh ramie
  • Enzyme preparation for degumming fresh ramie and its preparation method and method for degumming fresh ramie

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preparation example Construction

[0042] The preparation of the fresh ramie hemp and the enzyme soaking step of the fresh ramie hemp of the present invention are preferably carried out in the ramie farmland, which reduces factory land and personnel allocation, which can expand the factory scale and reduce costs.

[0043] The invention provides an enzyme preparation for fresh ramie degumming, comprising: alkaline pectinase with an enzyme activity of 50U / mL-5000U / mL, neutral xylanase with an enzyme activity of 500U / mL-2000U / mL, Glucanase with enzyme activity of 4000U / mL-50000U / mL, mannanase with enzyme activity of 600U / mL-50000U / mL, surfactant and chelating agent. Wherein alkaline pectinase belongs to a kind of pectinase, also has a kind of acid pectinase in addition, because the enzyme preparation provided by the present invention is to act on ramie fresh hemp, and water content is big in ramie fresh hemp, if use acid fruit Gelase, it must be hydrolyzed and cause enzyme preparation catalytic degumming effect an...

Embodiment 1

[0053] Preparation of enzyme preparation:

[0054] Add 5mL of polyoxyethylene lauryl ether and 5mL of chelating agent into 1000mL of water at a temperature of 40°C, stir evenly, and obtain the first mixed solution after polyoxyethylene lauryl ether and the chelating agent are completely dissolved. Neutral xylanase, dextranase, and mannanase were added to the first mixed solution, and the enzyme activity was adjusted as follows: alkaline pectinase: 300U / ml; neutral xylanase: 1000U / ml; glucanase: 1000U / ml; Carbohydrase: 8000U / ml; Mannanase: 1000U / ml. Enzyme preparation for fresh hemp degumming was obtained.

Embodiment 2

[0056] The origin of ramie: the efficiency of peeling hemp in Yuanjiang, Hunan; 265 kilograms of fresh hemp per day (equivalent to 100 kilograms of dry hemp)

[0057] After mechanical harvesting of fresh hemp, mechanical peeling and degreening, to obtain ramie fresh hemp, the prepared ramie fresh hemp is soaked in the container containing the enzyme preparation prepared in Example 1, and the enzyme soaking operation is carried out. The enzyme soaking temperature is 35°C The enzyme soaking time is 28h; the pH value is 8.5; the enzyme dosage is preferably 2.5% in the total weight percentage of fresh ramie. After the enzyme soaking operation, the fresh ramie hemp is taken out and placed on the hemp copying machine for pre-printing hemp operation. Pre-copy hemp 2 circles.

[0058] After the pre-coiling operation is finished, the ramie fresh hemp after the pre-coiling is packed into cages, 1200kg per cage, and then placed in the boiling and bleaching tank for high-pressure cooking...

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Abstract

The invention provides an enzyme preparation for degumming fresh ramie, a preparation method thereof and a method for degumming the fresh ramie. Alkaline pectinase and hemicellulase are mixed, and the obtained enzyme preparation can be directly used for the method for degumming the fresh ramie, so that the problem that the fresh ramie cannot be effectively degummed by a chemical degumming method and a biological bacterium degumming method is solved; meanwhile, the process for degumming the fresh ramie is simple, and preparation and enzyme immersion steps of the fresh ramie are performed in a farmland; the using amount of chemical medicaments in high-pressure cooking treatment fluid is small, and toxic chemicals are not used; and the chemical oxygen demand in wastewater obtained after ramie fibers are prepared is low, and the wastewater contains a large number of ions such as phosphorus, potassium, sodium and the like, so the wastewater can be directly used for irrigating the farmland, and the cost is saved and the environment is also protected.

Description

technical field [0001] The invention relates to the field of ramie degumming, in particular to an enzyme preparation for degumming fresh ramie, a preparation method thereof and a method for degumming fresh ramie. Background technique [0002] Ramie is a crop with a long history originating in my country. Its phloem contains a large number of primary fibers, and the single fiber length of ramie is 40mm to 450mm, which is the longest among hemp crops. The single fiber fineness is 5.0dtex~6.67dtex, the cross section is polygonal or oval, good elasticity, good insulation, high softness, it is a kind of textile raw material crop with great economic value. [0003] Ramie needs to be degummed to obtain primary fibers, and the traditional degumming method is to soak the undried ramie fresh hemp in water to ferment naturally, then wash away the gum, beat it, shake it and dry it in the sun. And obtain the fiber of ramie, obtain the primary fiber of ramie; Or dry ramie fresh hemp to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/00
Inventor 刘鲁民吕家华沈克群李新山王虎周英俊
Owner SHANGHAI KDN BIOTECH
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