D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
23/130, 23/275,
D21C 11/04 (2006.01) D21C 3/02 (2006.01) D21C 11/00 (2006.01)
Patent
CA 1339809
Sodium sulfide or hydrosulfide is oxidized to produce sodium polysulfide and sodium hydroxide. Under appropriate conditions, the oxidation may be pursued further to convert all the sodium sulfide into sodium thiosulfate. The oxidation is carried out at or above atmospheric pressure in a mixed reactor or in a pipeline reactor, by sparging oxygen or air, in a mixture of white liquor and lime mud particles produced in the recausticizing plant of a kraft mill.
588919
Fetherstonhaugh & Co.
Fpinnovations
Pulp And Paper Research Institute Of Canada
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