Method for single section bleaching bamboo/bagasse pulp

Abstract

The single section bamboo / bagasse pulp bleaching process includes the following steps: pre-treatment of pulp with chelating agent; adding certain amount of H2O2, NaOH and Na2SiO3; and introducing oxygen to bleach under certain conditions. The single section bamboo / bagasse pulp bleaching process has excellent effect, advanced technological process, short period, low consumption of water, electric power, steam and chemicals and low cost.

Description

technical field

[0001] The invention relates to a method for single-stage bleaching of bamboo / bagasse pulp, specifically a method for pretreating with a chelating agent, and then bleaching bamboo / bagasse pulp through the joint action of hydrogen peroxide and oxygen in a pressurized environment . Background technique

[0002] my country is the main producer of bamboo in the world. There are 39 genera and more than 500 kinds of bamboo in my country, with an annual output of about 20 million tons of bamboo. Bamboo has the advantages of high fiber content, long fiber length, and can replace some coniferous wood fibers. It is a raw material with the highest value for pulping and papermaking among gramineous raw materials. my country is also a big sugar producing country in the world, with about 5.4 million tons of bagasse per year, of which about 3 million tons can be used for papermaking; moreover, bagasse is a by-product of sugar factories, which has the advantages of concentr...