Method for the delignification of lignocellulosic material in an amine delignifying liquor containing a quinone or hydroquinone compound

  • US 4,178,861 A
  • Filed: 12/13/1977
  • Issued: 12/18/1979
  • Est. Priority Date: 12/13/1976
  • Status: Expired due to Term
First Claim
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1. A process for the delignification of lignocellulosic raw materials in the production of cellulosic pulps suitable for use in the manufacture of paper or paperboard which consists of pretreating the lignocellulosic raw material with a quinone or a hydroquinone compound in an essentially non-aqueous pretreatment liquor consisting of an amine delignifying liquor and cooking the lignocellulosic raw material with the pretreatment liquor or another amine delignifying liquor.

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