Abstract
An environmentally friendly chlorine-free technology for producing wood sulfite soluble pulp using only one oxidizing bleaching agent – hydrogen peroxide has been developed: unconventional catalyzed peroxide delignification and hydrogen peroxide bleaching. The conditions of cooking, delignification, extraction and bleaching of spruce sulfite pulp obtained as a result of studies, as well as successful combinations of conditions of all stages made it possible to obtain two types of soluble pulp by one technology: soluble pulp for nitration (for gunpowder) was obtained under a short scheme including a delignification step and hot alkaline extraction; by continuing this scheme with hydrogen peroxide bleaching in two steps, viscose pulp was obtained. The use of this technology will make it possible to implement a double import substitution – in raw materials (wood instead of cotton) and in finished products (pulp for chemical processing - for nitration and viscose pulp, which are currently imported).
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