Production process of refined cotton for filter paper

• Main Authors: ZHOU HANGXU, LI LIWEI, FAN JINTAO, FAN ZONGQING, ZHAN HONGJU
• Format: Patent
• Language: Chinese; English
• Published: 07.03.2023
• Subjects: APPARATUS THEREFOR; FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT; IMPREGNATING OR COATING OF PAPER; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; PULP COMPOSITIONS; REGENERATION OF PULPING LIQUORS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

The invention discloses a production process of refined cotton for filter paper. The production process comprises the following steps: a, selecting materials; b, impurity removal; c, shearing; d, pre-impregnating; e, cooking: performing first-stage cooking; performing second-stage cooking; performing third-stage cooking; f, shoving; g, first-stage high-concentration impurity removal; h, washing the pulp; i, second-stage high-concentration impurity removal; j, grinding into thick liquid; k, first-stage and second-stage low-concentration impurity removal; l, slurry heating; m, first-stage bleaching; n, alkali treatment; o, carrying out second-stage bleaching; p, dechlorinating; w, pulping after bleaching; x, second-stage and third-stage low-concentration impurity removal; the production process has the advantages that on the basis of a conventional production process, fiber shearing, multi-section high-concentration and low-concentration impurity removal and front and back pulping are added, a cooking aid and a