D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
9/2
D21C 3/04 (2006.01) D21C 3/00 (2006.01) D21C 11/00 (2006.01)
Patent
CA 1167204
A B S T R A C T A method for delignifying ligno-cellulosic materials and efficiently separate from each other the constituents thereof. Said materials are boil- ed in an aqueous acid medium in the presence of phenol compounds. Af- ter isolating the purified cellulose by filtration, the liquid phase separa- tes into two layers: an aqueous layer rich with pentoses and an organic layer rich with phenols and lignin, the latter providing, by distillation and pyrolysis of the residue, a quantity of phenols at least equal to that of the phenols used in the delignification stage.
380145
Armanet Jean M.
Johansson Allan A.
Michel Jean-Pierre
Roman Alain
Sachetto Jean P.
Battelle Memorial Institute
Robic Robic & Associes/associates
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