Cellulosic fibrous aggregate and a process for its preparation

Details Cellulosic fibrous aggregate and a process for its preparation Cellulosic fibrous aggregate and a process for its preparation

C - Chemistry, Metallurgy

08

L

400/1304, 154/13

C08L 97/02 (2006.01) C08H 8/00 (2010.01) B27K 5/00 (2006.01) B27N 1/00 (2006.01) B27N 3/08 (2006.01) B32B 5/26 (2006.01)

Patent

CA 2005468

A cellulosic fibrous aggregate formed from a cellulosic fibrous material by a process which comprises: a softening stage comprising exposing a section of cellulosic fibrous material to the action of an aqueous softening agent at a temperature in the range of from 150°C to 220°C at a pressure of at least the equilibrium vapour pressure of the softening agent at the operating temperature, thereby at least partially disproportionating and hydrolysing the hemicellulose and lignin present in the cellulosic fibrous material; and a curing stage comprising drying the product of the softening stage at a temperature in the range of from 100°C to 220°C to yield a cross-linked cellulosic matrix, and a process for its preparation comprising the aforementioned softening and curing stages.

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