SELECTIVE OXIDATION OF KRAFT COOKING LIQUORS

Provided is a process for the preparation of polysulfides which comprises reaching sodium sulfide with oxygen in the presence of a transition metal oxide, preferably MnO2, and with the consuption rate of O2 being at least 1.5x10-4 moles/1/sec. The process of the present invention is preferably condu...

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Bibliographische Detailangaben
Hauptverfasser:	SUNDARAM, MEENAKSI V, SAINT-CYR, KARINE, CORBEIL, SEBASTIEN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Provided is a process for the preparation of polysulfides which comprises reaching sodium sulfide with oxygen in the presence of a transition metal oxide, preferably MnO2, and with the consuption rate of O2 being at least 1.5x10-4 moles/1/sec. The process of the present invention is preferably conducted in a self-recirculated reactor, which has been found to allow easy control of the O2 consumption rate.