Waste paper deinking agent and its application in waste paper deinking

Abstract

The invention provides a waste paper deinking agent, and belongs to the technical field of papermaking assistants. The waste paper deinking agent comprises, by weight, 1-10 parts of higher fatty alcohols, 1-10 parts of higher fatty acids, 1-20 parts of fatty alcohol polyoxyethylene ether, 1-20 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 1-20 parts of fatty alcohol polyoxyethylene-polyoxypropylene ether, 1-20 parts of polyoxyethylene-polyoxypropylene ether random polyether, 0-5 parts of sodium silicate, 0-5 parts of sodium hydroxide, 0-5 parts of hydrogen peroxide, 0-5 parts of a chelating agent and 1-20 parts of water. The waste paper deinking agent has the advantages of low viscosity at -10DEG C or above, good fluidity, good deinking effect at a low temperature, small damages to fibers, improvement of the strength of finished pulp and the quality of finished paper, and low cost, and can be used in regeneration of office paper, cultural paper, art paper, white board paper and newsprint.

Description

technical field [0001] The invention relates to the technical field of papermaking auxiliary agents, in particular to a waste paper deinking agent. Background technique [0002] Due to the continuous reduction of resources and the deterioration of the environment in the 1980s, people turned their attention to waste paper. If waste paper can be used to make paper, it will save a lot of wood, water, electricity and other energy, greatly reduce sewage discharge, and reduce environmental pollution. After decades of development, papermaking from waste paper has become a huge industry. Waste paper deinking agent is a paper-making special chemical with multiple functions such as penetrating, washing, emulsifying, and dispersing. It is mainly used in enterprises that use waste paper to make pulp or paper. my country is a country with relatively poor resources, so the country actively promotes waste paper papermaking technology, but due to the lack of special chemicals for papermaki...

AI Technical Summary

Problems solved by technology

my country is a country with relatively poor resources, so the country actively promotes waste paper papermaking technology, but due to the lack of special chemicals for papermaking with excellent performance, many imported devices cannot play their due role, which has become a bottleneck problem restricting waste paper papermaking

[0003] With the rapid growth of waste paper recycling, waste paper deinking technology is facing the following problems: Due to the continuous improvement of current printing technology, the composition of ink is also changing. The color, gloss and firmness of printed products have all improved, which makes it more difficult to remove the ink. During the printing process, special treatments such as film covering and surface painting have added adhesives and resin barriers in production. Zhan Huaiyu "Pulping Principles and Engineering" discloses that industrial soap deinking agents in the prior art need to be dissolved at a high temperature above 90°C and heat preservation treatment is required to realize the regeneration of resized waste paper, Huang Shuyong ("Different Pulping State Analysis of Stickies under Conditions", Huang Shuyong, Zhonghua Paper Industry, 2015, 36(2):61-63) also disclosed that pulping treatment at a high temperature of 80°C can realize the removal of stickies in waste paper In addition, the pulping treatment of waste paper at a high temperature above 80 °C has caused troubles for waste paper recycling.