FOERFARANDE FOER AVLAEGSNANDE AV TRYCKSVAERTA FRAON AVFALLSPAPPER

There is disclosed an improvement to the process for the de-inking of printed waste paper which comprises (1) treating the waste paper in a pulper at an alkaline pH with alkali silicate, an oxidatively active bleaching agent, one or more acid components selected from the group consisting of fatty ac...

Full description

Saved in:
Bibliographic Details
Main Authors POPPEL, GUENTER, ULUBAY, HASAN
Format Patent
LanguageFinnish
Published 07.06.1982
Edition3
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:There is disclosed an improvement to the process for the de-inking of printed waste paper which comprises (1) treating the waste paper in a pulper at an alkaline pH with alkali silicate, an oxidatively active bleaching agent, one or more acid components selected from the group consisting of fatty acids and resinic acids containing more than 10 carbon atoms, and mixtures thereof, and a dispersing agent, and (2) separating the detached printing ink particles from the fiber suspension by either flotation, washing, or a combination thereof. The improvement comprises employing the acid and the dispersing agent in the form of an oil-in-water emulsion.
Bibliography:Application Number: FI19820002021