Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Including recovery of organic by-product
Patent
1975-05-30
1978-01-24
Corbin, Arthur L.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Including recovery of organic by-product
127 37, 162 73, 162 76, 162 84, 162 85, 162 86, 162 89, 162 90, 162 96, 162 97, 162 99, D21C 104, C13K 1300
Patent
active
040702324
ABSTRACT:
Plant material containing hemicellulose and lignin is prehydrolyzed in the presence of steam and the vapors of a dilute acid solution having a pH of 1.5-3.5 at a temperature of 105.degree. C to 135.degree. C for 7-20 minutes to hydrolyze the hemicellulose into pentoses and hexoses and to leave a fibrous material and a liquid, said liquid containing said pentoses and hexoses. The liquid is separated from the fibrous material, and the pentoses and hexoses are recovered from the liquid. The fibrous material is digested with white liquor at a temperature of 105.degree. C to 135.degree. C.
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Corbin Arthur L.
Friedman Stuart J.
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