EP 0325890 B1 19930609 - PROCESS FOR TREATING LIGNIN CONTAINING CELLULOSE PULP WITH OZONE
Title (en)
PROCESS FOR TREATING LIGNIN CONTAINING CELLULOSE PULP WITH OZONE
Publication
Application
Priority
EP 88810034 A 19880125
Abstract (en)
[origin: EP0325890A1] To separate lignin from cellulose material, the latter is exposed to the action of ozone in the gaseous phase in the presence of at least one C1-3-fatty acid, particularly acetic acid, in order to render the lignin contained in the cellulose material more soluble in the fatty acid by oxidative conversion.
IPC 1-7
IPC 8 full level
D21C 9/153 (2006.01); D21C 9/16 (2006.01)
CPC (source: EP US)
D21C 9/153 (2013.01 - EP US); D21C 9/163 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE ES FR GB SE
DOCDB simple family (publication)
EP 0325890 A1 19890802; EP 0325890 B1 19930609; AT E90404 T1 19930615; BR 8900299 A 19890919; CA 1319472 C 19930629; DE 3881676 D1 19930715; ES 2041828 T3 19931201; JP H01221587 A 19890905; US 5074960 A 19911224
DOCDB simple family (application)
EP 88810034 A 19880125; AT 88810034 T 19880125; BR 8900299 A 19890125; CA 588913 A 19890123; DE 3881676 T 19880125; ES 88810034 T 19880125; JP 1741489 A 19890125; US 60659590 A 19901031