Patent ID: 9493581
Filing Date: 2016-11-15
CPC Classification: C08B,D01F

Claim Text:
1. A process for the manufacture of viscose comprising the steps of: a) providing a non-dissolving pulp having a hemi-cellulose content of 10% or greater and/or an alpha-cellulose content of 90% or lower as a raw material; b) steeping the pulp in caustic solution; c) processing the steeped pulp; d) steeping the processed steeped pulp for a second time in caustic solution; and e) further processing the pulp from step d) to form a viscose solution; wherein: i) the pulp comprises a Softwood Kraft pulp as at least the or a major component, and the caustic concentration of the solution in step d) is at least about 11.5% w/w and the ratio of caustic concentration in the solution of step b) to that of the solution in step d) (the S1/S2 ratio) is from 1 to 1.8; ii) the pulp comprises a Bleached iii) the pulp comprises a non-dissolving pulp other than a Softwood Kraft or Bleached