Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1975-03-06
1977-04-05
Lindsay, Jr., Robert L.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
8111, 162 63, 162 65, 162 72, 162 76, 162 79, 162 80, 162 90, D21C 910, D21C 1114
Patent
active
040160297
ABSTRACT:
A process is provided for delignifying and bleaching cellulose pulp, which comprises carrying out the delignification and bleaching with oxygen and alkali in the presence of sodium bicarbonate, while removing carbon dioxide from the gas phase as required to maintain a carbon dioxide partial pressure within the range from about 0.001 to about 3 bars, thereby improving the selectivity of the delignification and bleaching.
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Jamieson et al., "Oxygen-Sodium Bicarbonate Pulping of White Birch", Tappi Journal, vol. 58, No. 2, 2-1975, pp. 68-71, 162-165.
Casey, Pulp & Paper, vol. I, 1960, p. 457.
Corbin Arthur L.
Lindsay, Jr. Robert L.
Mo och Domsjo Aktiebolag
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