Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1973-10-26
1980-01-08
Corbin, Arthur L.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 58, 162 65, 162 90, D21C 302
Patent
active
041826485
ABSTRACT:
An improvement in the delignification (pulping) of raw cellulose by treatment with oxygen and an alkaline buffer solution at elevated temperature and pressure, which comprises carrying out the process in an unflooded condition, that is, where contact between the raw cellulose and buffer solution is intermittent, both gaseous and liquid phases being present at all times. Optionally, cupric ion may be present as a catalyst.
REFERENCES:
patent: 2673148 (1954-03-01), Harris
patent: 2926114 (1960-02-01), Grangaard et al.
patent: 3652385 (1972-03-01), Noreus et al.
patent: 3654070 (1972-04-01), Pradt et al.
patent: 3736224 (1973-05-01), Grayson et al.
Copa William M.
Pradt Louis A.
Corbin Arthur L.
Johnson Thomas L.
Sterling Drug Inc.
Wyatt B. Woodrow
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