Process for producing sulphur from calcium sulphate

Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur

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423567R, C01B 1700

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048288160

ABSTRACT:
A process for producing sulphur from calcium sulphate wherein a charge is granulated from powder-like calcium sulphate and a carbonaceous component at a mass ratio of carbon of the carbonaceous component to calcium sulphate of 0.08-0.09:1 respectively; mixing of the resulting charge granules with a lump-like carbonaceous material at a mass ratio of carbon of the carbonaceous material to the charge granules (as calculated for dry solids) equal to 1:3-10 respectively; heating the mixture of the charge granules with the lump-like carbonaceous material in a vertical calcination furnace while continuously moving said mixture in a downward current simultaneously with counter-currently supplying an oxygen-containing gas; the maximum heating temperature being maintained within the range of from 1,100.degree. to 1,200.degree. C. and the temperature of the upper bed of said mixture in the furnace being maintained equal to 500.degree.-600.degree. C.; condensing sulphur vapors from the reaction sulphur-containing gases effluent from the top section of the furnace.

REFERENCES:
patent: 2011039 (1935-08-01), Gothers
patent: 3726957 (1973-04-01), Lind
patent: 3729551 (1973-04-01), Gorin
patent: 3796628 (1974-03-01), Sev
patent: 3932586 (1976-01-01), Guerrieri
patent: 4041141 (1977-08-01), Moss
patent: 4078048 (1978-03-01), Nadkarni
patent: 4098639 (1978-07-01), Noreus et al.
patent: 4520002 (1985-05-01), Willis, Jr.
"Sulphur", The British Sulphur Corp. Ltd., No. 147, Mar./Apr./1980, pp. 36-38, Hill et al.

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