C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/21, 23/348
C01B 17/16 (2006.01) B01D 53/14 (2006.01) B01D 53/50 (2006.01) C01B 17/44 (2006.01) C01F 11/18 (2006.01)
Patent
CA 1266959
ABSTRACT OF THE DISCLOSURE A method of treating solids containing the calcium salt of a sulfuric oxyacid comprising feeding to a reduction reactor a reducing gas stream containing hydrogen and/or carbon monoxide and having a first predetermined temperature and dry particles containing the calcium salt of sulfuric oxyacid and having a predetermined mean particle size to reduce the calcium salt to calcium sulfide, subse- quently cooling the gas stream obtained from the reduction reactor to a second temperature in a carbonation reactor to react the calcium sulfide with carbon dioxide and water vapor and produce calcium carbonate and hydrogen sulfide, guiding the resulting gas stream from the carbonation reactor into a dust collecting unit to collect solid particles, and further collecting the hydrogen sulfide from the gas stream flowing out from the dust collecting unit.
489530
Hitachi Zosen Corporation
Kirby Eades Gale Baker
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