Method for producing paper-pulp by using cotton stalk core or kendir stalk core

Abstract

The invention relates to a method for using a cotton stalk core or a bluish dogbane stalk core for the production of paper pulp. The invention uses a bio-fermentation method for the production by taking the cotton stalk core or the bluish dogbane stalk core subjected to separation of peel and core as raw materials. The production of the bio-fermentation method comprises a fermentation softening step and a pulping step. The fermentation softening step comprises: immersing the cotton stalk core or the bluish dogbane stalk core in the solution of a catalytic decomposition agent that is composite bio-enzyme comprising laccase and lignin enzyme. The invention has the beneficial effects that: the invention can directly immerse the crushed stalk cores, which are separated by a cotton stalk peel-core separating machine, in the solution of the catalytic decomposition agent to degrade lignin and soften fibers, without setting the procedures of crushing the raw materials. Cellulose and hemicellulose in the resultant product of the invention are retained to a maximum extent, pulping by employing the invention is pollution-free, the unscreened yield is 75-85%; the produced paper is not liable to brightness reversion. The invention is replaceable for wood pulp papermaking and is favorable for the protection of ecological environment.

Description

technical field [0001] The invention relates to a production method of paper pulp, in particular to a method for producing paper pulp by adopting cotton stalk core or apocynum stalk core. Background technique [0002] At present, pulp generally uses plant fibers such as wood or reed as raw materials, and adopts chemical pulping or mechanical pulping. Chemical pulping uses the reaction of chemical liquid and plant fiber raw materials at high temperature to make the intercellular layer of plant fibers Lignin is dissolved as much as possible, so that the plant fiber raw material is decomposed into pulp. Its main purpose is to remove lignin, and the higher the lignin content in the raw material, the more difficult it is to make pulp. The cellulose content of reed is only 41.57%, while the content of miscellaneous cells is as high as 35%, and the content of polypentose is more than 25%. Therefore, the physical strength of the finished paper obtained from reed pulp made from reed...

AI Technical Summary

Problems solved by technology

The cellulose content of reed is only 41.57%, while the miscellaneous cell content is as high as 35%, and the content of polypentose is more than 25%, so the physical strength of the finished paper made from reed pulp is low

The quality of wood pulp paper is good, but due to the need to prohibit deforestation of trees to protect the ecological environment, wood paper production is limited by raw materials

On the other hand, the commonly used chemical pulping method and mechanical pulping method also have disadvantages: the disadvantage of chemical pulping is that the yield of chemical pulping is only 40-47%, and it must be processed under high pressure (> 3kg / cm2). 2 ), cooking under high temperature (>160°C) conditions

[0006] 3. Paper produced by mechanical pulping is easy to return to yellow

But because the composition difference of cotton stalk core, apocynum stalk core and plant fibers such as wood, reed is very big, its existing paper pulp preparation method can't be adapted to cotton stalk core preparation paper pulp, and the method for preparing paper pulp with cotton stalk core has not See the report