Preparation method for deinking agent of mixed office wastepaper

Abstract

The invention relates to a preparation method for a deinking agent of mixed office wastepaper and belongs to the technical field of deinking agent preparation. According to the invention, natural renewable biomass raw materials are used for replacing petrochemical materials for producing low-cost and environment-friendly deinking agent; hexamethyl disilazane is adopted for modifying surface of activated carbon; the capacity of particles to absorb ink is enhanced by the modified methyl; oleophylic groups permeate into dense ink surface, are combined with ink particles and remove the ink particles from fibers; the removed ink particles are attached to air bubbles; a foam layer is formed when the air bubbles carrying ink particles rise to liquid level; the foam layer is removed in the mannerof overflowing or by a mechanical device; the deinking agent of mixed office wastepaper prepared according to the invention has the advantages of environment-friendly and nontoxic raw materials, low organic solvent content, excellent cleaning effect, no harm to human body and environment after use, no corrosion to equipment, capability of quickly dissolving and peeling ink, high degradability, andstrong wetting, emulsifying and cleaning functions.

Description

technical field [0001] The invention relates to a method for preparing a deinking agent for mixed office waste paper, and belongs to the technical field of deinking agent preparation. Background technique [0002] In the utilization of waste paper, about 15% is deinked pulp, which is used to produce newsprint, toilet paper and cultural paper, and with the development of office automation, the amount of office waste paper is increasing, and mixed office waste paper will An important source of high-quality fiber in large quantities. It has the advantages of long fiber, good quality and low price, and is a better potential resource of recycled fiber. The main problem in the recycling of mixed office waste paper is that non-contact printing waste paper occupies a relatively high proportion, and at the same time, the difficult-to-deink components in waste paper are also increasing. These difficult-to-deink waste papers mainly refer to laser printing paper and electrostatic copy...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the problem that the existing deinking agent will ca