Rapid degumming method of trees bast fiber

Abstract

The invention discloses a quick degumming method of tree bast fibers, which belongs to the degumming techniques of vegetable fibers, and mainly has the following technical points: (1) tree barks are denuded from tree trucks or tree branches, and old skins on the outer surface are removed; (2) the tree barks are placed into a soaking solution at the temperature of 15 to 65 DEG C and soaked for 0.5to 2 hours, and the soaking solution is an aqueous solution that contains 1 to 8 units of sodium hydroxide, 3 to 10 units of an osmotic agent and 0.5 to 3 units of a chelated dispersing agent per 1000units of the soaking solution; (3) the tree barks are drained and then tightly packed; (4) the tree barks are placed into steam and processed by heat for 0.5 to 2 hours at the temperature of 100 to 150 DEG C; (5) the tree barks after heat processing are taken out and placed into a squeezing machine so as to be squeezed, and pectin that is squeezed out is rinsed by water; (6) squeezed tree bark fibers are placed into an aqueous solution with the acid concentration of 0.5 to 5 percent and soaked for 5 to 30 minutes; (7) the tree bark fibers that are soaked in the acid solution are bleached anddried, thus finishing the degumming. The quick degumming method of the tree bast fibers is simple, easy and convenient, has the advantages of less water, alkali and energy consumption, and can be usedfor the degumming processing of the bast fibers.

Description

technical field [0001] The invention relates to a bast fiber degumming technology, more specifically, it relates to a fast degumming method of tree bast fiber. Background technique [0002] At present, the degumming treatment of bast fiber can be divided into chemical cooking method and biological enzyme method. Chemical cooking method needs to consume more alkali and water, and the average wastewater generated per ton of fiber is about 500-800T. The big deficiency of environmental pollution; the biological method is to use the decomposition of microorganisms to pectin to achieve the purpose of degumming. Its advantages are environmental protection, the amount of acid and alkali used is very small, and the waste water produced is also less. It is the key technology of current research, but Due to the difficulty in the screening of microorganisms, it is still difficult to have industrial use and promotion value at present, and the biological method takes a long time and has r...

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Problems solved by technology

[0002] At present, the degumming treatment of bast fibers can be divided into chemical cooking method and biological enzyme method. The chemical cooking method needs to consume more alkali and water, and the average wastewater generated per ton of fiber is about 500-800T. The big deficiency of environmental pollution; the biological method is to use the decomposition of microorganisms to pectin to achieve the purpose of degumming. Its advantages are environmental protection, the amount of acid and alkali used is very small, and the waste water produced is also small. It is the key technology of current research, but Due to the difficulty in the screening of microorganisms, it is still difficult to have industrial use and promotion value at present, and the biological method takes a long time and has relatively low efficacy, as disclosed in Chinese patent CN200810025684. The "biological enzyme degumming method of tree bast fiber" is to firstly treat with acid enzyme solution or alkaline enzyme solution to achieve the purpose of tree bast degumming, and the time required is basically about 10 hours about

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