Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Patent
1979-06-27
1980-11-25
Douglas, Winston A.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
260369, 162 82, 162 90, 260365, D21C 320, D21C 910, C07C 4968
Patent
active
042356660
ABSTRACT:
A new industrial product, namely 1,2,3,4,4a,9a-hexahydro-9,10-anthracene-dione, is disclosed together with a process for its preparation and its use in conventional alkali metal hydroxide cook or Kraft cook processes for the delignification of lignocellulose materials.
REFERENCES:
patent: 1890040 (1932-12-01), Luttringhaus et al.
patent: 3574716 (1971-04-01), Coffey
patent: 4012280 (1977-03-01), Holton
patent: 4036681 (1977-07-01), Holton
Bourson Lucien E.
Delavarenne Serge Y.
Tellier Pierre
Covington Raymond K.
Douglas Winston A.
Produits Chimiques Ugine Kuhlmann
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