Pulping process

Details Pulping process Pulping process

D - Textiles, Paper

21

C

9/27

D21C 1/06 (2006.01)

Patent

CA 1232109

Abstract of the Disclosure The invention is concerned with an improved pulping process for producing high yield pulps from woody lignocellulosic material wherein the ligno- cellulosic material is treated with a pulping chemi- cal and mechanically defibrated. The improvement comprises pre-treating the lignocellulosic material by impregnating same with a water-miscible loweralkanol- amine and ammonium hydroxide so as to cause softening of lignin in the material and to promote fiber sepa- ration. As a result, pulping chemical and refining energy consumption as well as vapor and liquid effluent pollution are significantly reduced.

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