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
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.
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.
Covington Raymond K.
Douglas Winston A.
Produits Chimiques Ugine Kuhlmann
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