Method for the conversion of gypsum to elemental sulfur

Details Method for the conversion of gypsum to elemental sulfur Method for the conversion of gypsum to elemental sulfur

1993-05-11

2000-02-15

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

4235411, 423555, 4235663, 423569, 422129, 422142, 422189, 422198, C01B 1700, C01B 1702, B01J 818

Patent

active

060249323

ABSTRACT:
A process for the recovery of sulfur and carbon monoxide from metal sulfates in which the carbon monoxide is recycled as a reducing agent for reaction with the metal sulfate. Metal sulfates such as gypsum (calcium sulfate dihydrate) are processed to form sulfur dioxide. The sulfur dioxide is contacted with carbonaceous matter at sufficiently high temperature to form elemental sulfur and carbon monoxide. The carbon monoxide is then recycled for use as a reducing agent in the initial processing of the metal sulfate.

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"Decomposition of Gypsum in a Fluidized-Bed Reactor" by D A Martin et al; Bureau of Mines Investigation Report No. 6286;1963.

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