MASSKOKNINGSFOERFARANDE OCH KOMPOSITION SOM ANVAENDS I DETSAMMA

MASSKOKNINGSFOERFARANDE OCH KOMPOSITION SOM ANVAENDS I DETSAMMA

A compsn. for increasing the yield of paper pulp derived from lignocellulosic materials comprises:- (a) 0.01-1.5 wt.% anthraquinone, and (b) 0.01-10 wt.% of a divalent metal salt comprising Ca, Ba, Sr, Mg or Zn salt, based on the lignocellulosic material. Also claimed is a process for the delignific...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: STELTENKAMP,MICHAEL S
Format: Patent
Sprache:fin ; swe
Schlagworte:
APPARATUS THEREFOR
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
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Beschreibung
Zusammenfassung:A compsn. for increasing the yield of paper pulp derived from lignocellulosic materials comprises:- (a) 0.01-1.5 wt.% anthraquinone, and (b) 0.01-10 wt.% of a divalent metal salt comprising Ca, Ba, Sr, Mg or Zn salt, based on the lignocellulosic material. Also claimed is a process for the delignification of lignocellulosic materials by treating the latter with an alkaline digesting liquor contg. the above compsn. and up to 50 vol.% of the spent liquor.