PRODUCTION OF POLYSULFIDE LIQUOR IN A KRAFT MILLS CAUSTICIZERS

Authors
ULOTH V DORRIS G THRING R HOGIKYAN R WEARING J TENCH L AYTON J
Citation
V. Uloth et al., PRODUCTION OF POLYSULFIDE LIQUOR IN A KRAFT MILLS CAUSTICIZERS, Tappi journal, 80(10), 1997, pp. 223-233
Citations number
33
Categorie Soggetti
Materials Science, Paper & Wood
Journal title
Tappi journal → ACNP
ISSN journal
07341415
Volume
80
Issue
10
Year of publication
1997
Pages
223 - 233
Database
ISI
SICI code
0734-1415(1997)80:10<223:POPLIA>2.0.ZU;2-B
Abstract
Polysulfide can be added in kraft pulping to improve the hemicellulose yield. To produce polysulfide in the mill, a portion of the sulfide i n white liquor can be oxidized. Batch and continuous pilot plant trial s at two kraft mills confirmed the technical feasibility of using lime mud as the primary oxidation catalyst. With oxygen and air as oxidant s and with small amounts of MnO2 added, a cooking liquor was produced with polysulfide concentrations suitable for pulping.