C - Chemistry – Metallurgy – 07 – K
Patent
C - Chemistry, Metallurgy
07
K
260/227, 23/382
C07K 1/00 (2006.01) C13K 1/02 (2006.01) C13K 13/00 (2006.01)
Patent
CA 1266264
ABSTRACT OF THE DISCLOSURE A continuous hydrolysis process for the hydrolysis of wood and wood derived products into sugars and other products has an overall countercurrent flow of liquids and solids but an integral co-current flow of the liquids and solids as part of the process. Woodchip or other feedstock is formed into a slurry which is acidified, pressurised and heated before being hydrolysed in reactors. Three heat exchangers form a closed circuit in which a second heat exchanger recovers heat from the slurry, a first heat exchanger returns heat to the slurry and a third heat exchanger makes up lost heat. The slurry is cooled before pressure reduction by pressure reducing means and separation of the solids and liquid. The cooling prevents flashing to steam of part of the liquid in the slurry so that the process is single phase where generation of steam is avoided. After separation the solids can proceed to further processing or to discharge as lignin. The liquid can proceed to further processing or discharge. By adopting this process, the leaching of wood and removal of sugar and lignins can be operated continuously at a low heat energy using a simple reactor.
490201
Fetherstonhaugh & Co.
Just Jack Tama Haigh
Ramsey Francis John
LandOfFree
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