Waste paper deinking agent and preparation method thereof

Abstract

The invention relates to a deinking agent, and provides a waste paper deinking agent which is good in deinking effect, environmentally friendly, nontoxic and free of strong acid and strong base. The waste paper deinking agent comprises, by weight, 20-30 parts of isophorone diisocyanate, 10-15 parts of polyethylene glycol, 20-30 parts of penetrating agents, 5-8 parts of sodium alga acid, 12-18 parts of attapulgite and 50-60 parts of water. The invention further provides a preparation method of the waste paper deinking agent. The preparation method comprises the steps that 1, an instrument is disinfected; 2, the disinfected instrument is taken out, the 20-30 parts by weight of isophorone diisocyanate is added in the instrument, temperature is increased to be 50-55 DEG C, then the penetrating agent is dropwise added in the instrument through a micro constant-pressure dropping funnel, heat is preserved for 1.5-2.0 h with stirring, then the polyethylene glycol is dropwise added, a reaction is performed for 2-2.5 h, the water, the sodium alga acid and the attapulgite are added, even stirring is performed, and therefore the waste paper deinking agent can be obtained.

Description

technical field [0001] The invention relates to a deinking agent, in particular to a waste paper deinking agent and a preparation method thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection and the shrinking of social resources, the recycling of waste paper has received unprecedented attention, and various waste paper recycling technologies have emerged in an endless stream. Among them, the use of waste paper to produce high-quality living and production paper has always been the development direction of waste paper utilization technology. In the process of producing high-quality paper pulp from waste paper, necessary or sufficient deinking treatment of waste paper is a key link in the pulping process of waste paper. Since all kinds of waste paper are more or less processed by printing, especially waste papers such as waste newspapers, waste books and magazines that have been printed with ink, the ink is not easy to r...

AI Technical Summary

Problems solved by technology

The existing various deinking agents have different product performance due to different waste paper raw materials or their own production technology level, and the removal efficiency of ink is generally low, or some deinking agents are in production. Too much talcum powder and other inorganic fillers are added in the process, resulting in too high ash content of waste paper pulp after deinking treatment, which is not conducive to further bleaching treatment, or is not conducive to the improvement of pulp grade

At the same time, due to the continuous improvement of the quality of printing inks, many existing waste paper deinking agents can no longer meet the requirements of the existing waste paper deinking technology.