DELIGNIFICATION OF LIGNOCELLULOSIC MATERIAL WITH A SODA PULPING LIQUOR CONTAINING A DIELS ALDER ADDUCT OF NAPHTHOQUINONE IN ADMIXTURE WITH A NITRO AROMATIC COMPOUND

摘要

Delignification of lignocellulosic material, such as wood, straw or bagasse, with a soda pulping liquor containing a diketo hydroanthracene selected from the unsubstituted and lower alkyl-substituted Diels Alder adducts of naphthoquinone and benzoquinone and a nitro aromatic compound selected from mono and di-nitrobenzenes and the amino, carboxy, hydroxy and methyl derivatives of said nitrobenzenes.