Method for producing dissolving pulp from mechanical pulp, waste paper and waste paper

摘要

1. TECHNICAL FIELD OF THE INVENTION;The present invention relates to a method for producing high purity dissolving pulp from mechanical pulp, paper and waste paper.;2. The technical problem to be solved by the invention;Conventional dissolution pulp manufacturing method is not only expensive, but also uses toxic chemicals, which causes serious pollution, consumes a lot of energy, and processes bleaching and refining after pulp is manufactured. Has its drawbacks.;3. Summary of Solution to Invention;In the present invention, disintegrated paper pulp, thermo-based pulp, machine pulp, such as deinking pulp, paper and waste paper to a certain size using a dry paper dissociator, and then at each temperature sodium hypochlorite, sodium chlorite, sodium hydroxide After treating with water and cresol mixed solvent, hemicellulose and ligrin were eluted, separated, filtered and washed and dried to prepare high-purity dissolving pulp.;4. Important uses of the invention;Dissociate mechanical pulp or waste paper through dry paper dissociation, and dissolve the pulp with various chemicals to obtain high-purity dissolving pulp, thereby reducing costs, process simplification, and energy, and preventing environmental pollution. Have