Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Including recovery of organic by-product
Reexamination Certificate
2008-03-06
2011-10-18
Hug, Eric (Department: 1741)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Including recovery of organic by-product
C162S016000, C162S076000, C162S077000, C127S037000
Reexamination Certificate
active
08038840
ABSTRACT:
A process for refining and producing cellulose, lignin and xylose from biomass material comprises the following steps: pulverizing and screening the biomass material; and then dipping the biomass material in organic acid with lower boiling point and decomposing it into xylose, xylo-oligosaccharide, cellulose and lignin to make the biomass material fluidify; cooling the fluidified biomass material after finishing the reaction, adding organic solvent, and mixing uniformly and standing; separating, washing and drying the precipitation to obtain amorphous cellulose after precipitating; distilling the mother solution of precipitation of cellulose and recovering the organic acid and the resulting volatile organic substance; standing the distilled mother solution after cooling, and then separating, washing and drying the precipitation to obtain xylose and xylo-oligosaccharide after precipitating; distilling and recovering the organic solvent in the mother solution of precipitation of xylose and xylo-oligosaccharide, and separating and drying the precipitation separated out from the distilled mother solution.
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International Search Report for Application No. PCT/CN2008/070432, dated Jun. 19, 2008.
Chin Peter
DeConti, Jr. Giulio A.
Hug Eric
Lathrop & Gage LLP
Trinque Brian C.
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