Process for preparing a hydrolysed lignocellulosic material

Details Process for preparing a hydrolysed lignocellulosic material Process for preparing a hydrolysed lignocellulosic material

D - Textiles, Paper

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D21C 7/00 (2006.01) C08H 8/00 (2010.01) B27N 1/00 (2006.01) C08L 97/02 (2006.01) D21B 1/36 (2006.01) D21C 1/02 (2006.01) D21C 1/10 (2006.01) D21F 5/08 (2006.01)

Patent

CA 2016445

- 1 - ABSTRACT OF THE DISCLOSURE An energy efficient process for hydrolysing lignocellulosic materials which comprises using a primary system by providing a start-up energy input to operating saturated steam conditions and thereafter operating the primary system with substantially constant energy input the condition of the hydrolysing saturated steam being controlled by water injection and/or steam bleeding from the primary system. The dwell time of the solids stream in the primary sustem is controlled by controlling its passage with flashing off of steam into a secondary system where drying occurs together with some small measure of hydrolysis in a lower pressure superheated steam environment, there being an energy input into the secondary system using steam bled from the primary system. The output solids material stream is preferably capable of being self polymerised into a formed shape eg a board.

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