Pre-Treatment of Sulfite Pulp Before Bleaching with Oxygen Containing Chemicals

摘要

This invention relates to the pre-treatment of sulfite pulp. More particularly, this invention relates to a novel process for caustic extraction of unbleached sulfite pulp to reduce metallic impurities in the pulp. The process of reducing metallic impurities in unbleached sulfite pulp comprises subjecting the pulp to caustic extraction.