METHOD AND APPARATUS FOR CONCENTRATING BLACK LIQUOR

A METHOD AND APPARATUS FOR CONCENTRATING BLACK LIQUOR A method and apparatus are disclosed for concentrating an alkaline waste liquor containing sulfur compounds, the so-called black liquor, which is discharged from a step of Kraft-cooking wood fibers, in order to recover the cooking chemicals from...

Full description

Saved in:
Bibliographic Details
Main Authors YAGUCHI, TOKIYA, SHIMOKURA, AKIRA
Format Patent
LanguageEnglish
French
Published 10.04.1990
Edition4
Subjects
APPARATUS THEREFOR
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
TEXTILES
Online AccessGet full text

Cover

More Information
Summary:A METHOD AND APPARATUS FOR CONCENTRATING BLACK LIQUOR A method and apparatus are disclosed for concentrating an alkaline waste liquor containing sulfur compounds, the so-called black liquor, which is discharged from a step of Kraft-cooking wood fibers, in order to recover the cooking chemicals from said waste liquor, characterized in that CO2 gas and/or a gas containing CO2 gas is added to said waste liquor as a boiling-point-lowering agent, viscositylowering agent and solidification promoter, after a step of oxidizing said waste liquor and in or prior to one or more stages during the step of concentrating said waste liquor.
Bibliography:Application Number: CA19850491196