| 摘要 |
<p>A process for separating lignin and recovering phenol from a phenol solution obtained by treating a lignocellulose-containing material with a phenol-containing solution comprises the steps of:- (1) extracting (19) the phenol solution (A, 18) with water or with an aqueous solution (20) at elevated temperature to give a phenol-containing aqueous phase (B) and a lignin-containing organic phase (C); (2) reducing the temperature (21) of the phenol-containing aqueous phase (B) so that there is formed a phenol phase of low water content (D), and an aqueous phase of low lignin content (E); and (3) the low lignin content aqueous phase (E) is returned to step (1) and lignin (28) is recovered (26) from the lignin-containing organic phase (C) produced in step (1). n</p> |
