DELIGNIFICATION OF LIGNOCELLULOSIC MATERIAL WITH AN ALKALINE LIQUOR IN THE PRESENCE OF A DIELS ALDER ADDUCT OF BENZOQUINONE OR NAPHTHOQUINONE

摘要

Delignification of lignocellulosic material, such as wood, straw or bagasse, by treatment with an alkaline pulping liquor containing a diketo hydroanthracene selected from the unsubstituted and lower alkyl substituted Diels Alder adducts of benzoquinone and naphthoquinone.