Process to dissociate and extract the Lignin and the Xylan from

Details Process to dissociate and extract the Lignin and the Xylan from Process to dissociate and extract the Lignin and the Xylan from

1988-09-19

1990-03-13

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Defibration by projection or explosion

162 76, 162 77, 162 78, 162 89, 162 90, D21B 136

Patent

active

049080997

ABSTRACT:
A process for the separation of the fibres from each other in lignocellulosic (straw, bagasse, wood) composites, and at the same time to dissociate the Lignin and the Xylan in the middle lamella and the primary wall of the lignocellulosic material, to enable a simple non reactive solvent extraction of the middle lamella and primary wall components while substantially retaining the structural integrity of the fibre bundle, sometimes referred to as the S2 layer, which is the strength member of the lignocellulosic fibre. The purpose of this process is to produce a fibre suitable to replace conventional Chemical Thermal Mechanical Pulp, for paper or as a carrier for high absorbency Cellulose in diaper and similar absorbent material applications, and at the same time to recover the chemical components of the middle lamella and the primary wall of the fibre, as co-products in a marketable, chemically reactive form.

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