Procedure for recirculating phenol in a lignocellulosic...

Details Procedure for recirculating phenol in a lignocellulosic... Procedure for recirculating phenol in a lignocellulosic...

C - Chemistry, Metallurgy

07

G

260/133, 9/28

C07G 1/00 (2006.01) D21C 9/02 (2006.01)

Patent

CA 1281714

ABSTRACT OF THE DISCLOSURE A procedure for recirculating phenol in a digestion process for lignocellulosic materials, in which lignocellulosic material is digested with phenol-containing solutions in order to dissolve lignin. Phenol recirculation is carried out in a cyclic process in which phenol-containing solution is first used in a washing step of the cellulose material arriving from the phenol digestion, then in the lignocellulosic material digestion step itself, and finally in a lignocellulosic material impregnation step before the phenol digestion step.

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