Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Reexamination Certificate
2011-05-17
2011-05-17
Daniels, Matthew J (Department: 1741)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
C162S017000, C162S041000, C162S070000
Reexamination Certificate
active
07943009
ABSTRACT:
A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. In one embodiment, the pre-extraction step involves contacting the lignocellulosic material with an aqueous solution under conditions that release acidic material from the lignocellulosic material into the aqueous solution, and the aqueous solution includes a basic material that at least partly neutralizes the acidic material so that the aqueous solution at the end of the pre-extraction step has a pH within a range of from 4.5 to 11. The process also includes a pulping step, after the pre-extraction step, in which the lignocellulosic material is separated into pulp. The process further includes an adsorption step, after the pulping step, in which hemicellulose is adsorbed on the pulp.
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Goyal Gopal C.
Jiang Jianer
van Heiningen Adriaan Reinhard Pieter
Yoon Sung-Hoon
Zou Haixuan
Calandra Anthony J
Daniels Matthew J
International Paper Company
MacMillan Sobanski & Todd LLC
University of Maine System Board of Trustees
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