DEVELOPMENT OF TECHNOLOGICAL SCHEME FOR PRODUCTION OF WOOD VISCOSE PULP

Wood viscose pulp was obtained from industrial bisulfite pulp with a high mass fraction of lignin intended for paper production. The technology used is original, environmentally friendly, characterised by selectivity of processes and reagents used. The proposed technology causes less destruction of pulp than traditional ones and leads to obtaining, respectively, bleached and ennobled pulp of higher yield (the technology was developed by the authors earlier). As a result of the research, the technological scheme for the production of viscose pulp took the following form: Pk - E - Ch1- HE - Ch2 - G - A. The technology includes a stage of bleaching with sodium hypochlorite to regulate the viscosity of cellulose. The implementation of the proposed scheme at the existing pulp mill in terms of capital costs will not be comparable with the cost of creating a new production, because there will be no need to change the existing production (pulping, washing, sorting of pulp), thus obtaining import substitution of cotton raw materials with domestic renewable - wood. The resumption of viscose pulp production in the country is very actual and practically is also import substitution. Quality indicators of the obtained cellulose fully correspond to the norms of GOST 5982-84 "Viscose sulfite pulp" of the first grade.