Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Reexamination Certificate
2007-04-03
2007-04-03
Griffin, Steven P. (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
C162S014000, C162S055000, C162S060000, C162S079000, C127S034000, C536S128000
Reexamination Certificate
active
10469371
ABSTRACT:
The invention relates to a method for separating hemicelluloses from a biomass containing hemicelluloses. The method includes the steps of: a) extracting the hemicelluloses from the biomass containing hemicelluloses by treating them with a complex compound in an aqueous solution, and forming a soluble hemicellulose complex, and b) separating the complexed hemicelluloses from the biomass. The method is especially suitable for producing high-quality chemical conversion pulp from raw cellulose. The products produced with the method of the invention have a high degree of purity, and the method is extremely economical and causes few emissions. Hemicelluloses in a pure form can be obtained as by-products of the method.
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Kettenbach Gerhard
Stein Armin
Darby & Darby
Griffin Steven P.
Kinney Anna L.
Rhodia Acetow GmbH
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