Cooking auxiliary agent for papermaking and pulping

Abstract

The invention relates to a cooking auxiliary agent for papermaking and pulping, belongs to the field of papermaking, and aims to solve the problems that the existing cooking auxiliary agent is high in toxicity and severe in environmental pollution. The cooking auxiliary agent for papermaking and pulping comprises the following components in percentage by weight: 8-12% of primary alcobol ethoxylate, 10-20% of linear alkylbenzene sulfonates, 3-8% of alkyl sulfonate sodium acetate, 3-8% of alkyl phenyl polyoxyethylene ether, 2-5% of sodium nonylphenol polyoxyethylene ether sulfonate, 1-3% of methyl sulfone, 2-5% of carboxymethyl cellulose, 0.5-1.2% of oleamide, 0.1-0.5% of sodium pyrophosphate and the balance of deionized water. The cooking auxiliary agent is mainly applicable to the papermaking field, can reduce environmental pollution, improve the screened pulp yield and reduce Kappa number.

Description

technical field [0001] The invention relates to a cooking aid for papermaking and pulping, which belongs to the field of papermaking. Background technique [0002] In the process of chemical pulping, cooking aids greatly affect the rate of lignin removal, pulp quality, pulp yield, and affect the effect of subsequent bleaching. At present, most pulping enterprises use soda sulfide, and some use anthraquinone and its derivatives, but these cooking aids have poor solubility and slow penetration into raw materials, and the decomposition and dissolution of lignin take a long time, which causes dehydration. The removed substances are easily re-adsorbed by the fiber, which affects the quality and yield of the pulp. In addition, this kind of additive has certain toxicity, causes great environmental pollution, is easy to scale in the pipeline, and is highly corrosive to equipment. [0003] Surfactants have the functions and functions of washing, wetting, penetrating, dispersing, em...

AI Technical Summary

Problems solved by technology

At present, most pulping enterprises use soda sulfide, and some use anthraquinone and its derivatives, but these cooking aids have poor solubility, slow penetration into raw materials, and long time for lignin decomposition and dissolution, which causes dehydration. The removed substances are easily re-adsorbed by the fiber, which affects the quality and yield of pulp

In addition, such additives are toxic to a certain extent, resulting in serious environmental pollution, easy fouling in pipelines, and great corrosion to equipment.

Images