Process for preparing pulp by using salix mongolia by chemical mechanical method

Abstract

The invention relates to a process for preparing pulp by performing enzyme pretreatment on salix mongolia by a chemical mechanical method in the field of processes for preparing the pulp by chemical mechanical methods, which solves the problems of low whiteness, low intensity properties and low yield of paper pulp due to the shortness of salix mongolia fibers. The process comprises the following steps of: performing a first stage of cellulose enzyme pretreatment on salix mongolia pulp which is subjected to a first stage of extrusion defibering after steaming; soaking the pulp which is subjected to the enzyme pretreatment by using soda hydrogen dioxide solution; performing a second stage of extrusion defibering after the soaking; performing a second stage of dextranase pretreatment on the pulp which is subjected to the extrusion defibering; performing a second stage of soaking on the pulp which is subjected to the enzyme pretreatment by using the soda hydrogen dioxide solution; performing a first stage of defibrination and high-concentration storage bleaching on the soaked pulp together with impregnation liquid; and performing a second stage of defibrination to produce chemical mechanical pulp with high whiteness, high yield and high strength. By the process, the mechanical pulping performance of fast growing shrub salix mongolia can be improved, the application range of high-yield pulp of the salix mongolia can be widened, and the application value of the salix mongolia can be improved.

Description

technical field [0001] The invention relates to a chemical-mechanical pulping process, in particular to a chemical-mechanical pulping process of salixase pretreatment. Background technique [0002] The pulp and paper industry has always occupied an important position in the global industrial manufacturing industry. The production and consumption level of paper and cardboard has become an important symbol to measure a country's economic development level and social progress. With the development of the economy, the consumption of paper products shows a continuous growth trend. Compared with the rising market demand, the raw material gap of China's paper industry is very large. China is short of timber resources, and the output of timber used for papermaking is far from meeting the needs of the development of the papermaking industry. Coupled with the shortcomings in the scale and quality of domestic waste paper recycling, the shortage of papermaking raw materials has become...

AI Technical Summary

Problems solved by technology

[0004] In order to improve the mechanical pulping performance of salix salix and improve the whiteness and strength performance index of pulp, the present invention provides a kind of salix chemical pulp with good whiteness and strength performance The mechanical pulping process fundamentally solves the problems of low pulp whiteness, poor strength performance and low pulp yield caused by the short and small fibers of Salix salix