FOERFARANDE FOER SEPARERING AV LIGNIN OCH FENOL FRAON FENOLLOESNINGAR

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 te...

Full description

Saved in:
Bibliographic Details
Main Author EKMAN,KURT
Format Patent
LanguageFinnish
Swedish
Published 10.01.1989
Edition4
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
TEXTILES
THEIR PREPARATION OR CHEMICAL WORKING-UP
Online AccessGet full text

Cover

More Information
Summary: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
Bibliography:Application Number: FI19860005359