Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Reexamination Certificate
2011-01-11
2011-10-18
Daniels, Matthew (Department: 1741)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
C162S072000, C162S077000, C162S082000
Reexamination Certificate
active
08038842
ABSTRACT:
A method for the fractionation of lignocellulosic materials into cellulose, hemicelluloses and lignin in a batch or continuous process in a treatment with vaporous mixture of aliphatic alcohol, sulfur dioxide and water. Cooking conditions are varied to get different proportions of cellulose, hemicelluloses and lignin. Chemical recovery through pressure release is described.
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Pylkkanen Vesa
Retsina Theodora
van Heiningen Adriaan
Altera Law Group LLC
American Process, Inc.
Calandra Anthony
Daniels Matthew
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