| 摘要 |
FIELD: pulp-and-paper industry. ^ SUBSTANCE: invention relates to manufacture of cellulose from vegetable cellulose-containing raw material and can be used to manufacture cellulose from linen material, designed for chemical processing as well as for manufacturing cotton wool and paper. Cellulose-containing material is first loosened, then soaked in aqueous solution containing alkali, hydrogen peroxide, and surfactant. After that, material is pulped and simultaneously bleached, then washed with softened water in two steps at water duty 1:(5-20), squeezed to moisture content 60-80%, and dried. According to this invention, before the washing step, material is acidified with nitric acid solution and, before drying, ground. ^ EFFECT: improved economical efficiency of manufacturing cellulose suitable for chemical processing due to use of out-autoclave low-temperature alkali pulping and improved environmental safety of process. ^ 3 cl, 3 ex |
