Method for regenerating calcium sulfoxy compounds produced in th

Details Method for regenerating calcium sulfoxy compounds produced in th Method for regenerating calcium sulfoxy compounds produced in th

1978-12-05

1980-05-06

Thomas, Earl C.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423244, 423356, 423431, 423512A, 423562, 423563, 423571, C01B 1702

Patent

active

042017599

ABSTRACT:
In methods for combusting carbonaceous sulfur-containing fuels in a fluidized bed wherein the fluidized bed contains at least one calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and calcium bicarbonate to absorb sulfur oxides formed during the combustion of the carbonaceous fuel thereby producing calcium sulfoxy compounds having the formula CaSO.sub.x wherein x is 3 or 4, an improvement comprising (a) withdrawing a stream of fluidized bed solids containing said calcium sulfoxy compounds and mixing the fluidized bed solids and said calcium sulfoxy compounds with water to produce a slurry; (b) reacting the CaSO.sub.x compounds with NH.sub.3, H.sub.2 O and CO.sub.2 to produce water-soluble ammonium sulfoxy compounds such as NH.sub.4 (HSO.sub.x) where x is 3 or 4 and CaCO.sub.3 ; and (c) separating the ammonium sulfoxy compounds from the fluidized bed solids and CaCO.sub.3.

REFERENCES:
patent: 1902649 (1933-03-01), Larsson
patent: 2722473 (1955-11-01), Toland, Jr.
patent: 2928718 (1960-03-01), Berglund
patent: 3714338 (1973-01-01), Urban
patent: 3989809 (1976-11-01), Stauffer

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