B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
23/119, 23/349,
B01J 23/92 (2006.01) A61L 9/00 (2006.01) B01D 53/86 (2006.01) B01J 27/30 (2006.01) B01J 37/12 (2006.01) C01B 17/775 (2006.01) C01F 11/46 (2006.01)
Patent
CA 1047474
A B S T R A C T In a method for oxidizing sulfur dioxide by contacting a sulfur dioxide-consisting gas and an oxygen-containing gas with an aqueous solution containing pentavalent vanadium and divalent manganese as a catalyst, the method for regenerating and recycling the oxidation catalyst which comprises adding at least one calcium compound from the group consisting of calcium oxide, calcium hydroxide and calcium carbonate and an oxygen-containing gas as an oxidizing agent to at least a part of the aqueous solution catalyst used in the oxidation reaction, separating the resulting gypsum, and recycling the recovered aqueous solution catalyst for use in the oxidation of sulfur dioxide.
209157
Koiwai Yoshihisa
Nambu Masao
Yamamoto Syunichi
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