FIELD: pulp-and-paper industry. SUBSTANCE: cellulose solution is prepared by passing preliminarily prepared mixture of tert-amine-N- oxide, water, and cellulose through thin-film evaporator using blade rotor. Treatment is conducted under following conditions: heated surface area from 1 to 125 sq. m, distance between adjacent blades 65 to 175 mm, of periphery speed less than 8 m/s, underpressure 25 to 100 mbar, and temperature 90 to 135 C. EFFECT: intensified cellulose dissolution process. 9 cl, 9 dwg, 3 tbl
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Authors
Dates
1998-02-10—Published
1993-09-15—Filed