Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Patent
1983-08-30
1985-03-26
Thomas, Earl C.
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
423576, 422115, 422171, 422190, C01B 1704, B01D 5336, B01J 804
Patent
active
045072752
ABSTRACT:
A system and process produce high actual levels of sulfur recovery from acid gas. The system includes two conventional Claus reactors and two cold bed adsorption (CBA) reactors. Four condensers are provided, one disposed before each of the catalytic reactors, and one disposed after the CBA reactor. The system includes a gas clean-up treatment zone for hydrogenation, drying and oxidation of gas to provide stoichiometric ratio of H.sub.2 S and SO.sub.2. The gas is passed through the clean-up treatment zone prior to being fed to the first of the CBA reactors. The system is designed to operate either in a recovery mode or in a regeneration mode. In the recovery mode, the reactors are in series and the CBA reactors are operated below dew point of sulfur. In regeneration mode, effluent from the clean-up treatment zone is heated in a heat exchanger using effluent from the first catalytic reactor as the heat source. The resulting regeneration gas is fed to one of the two CBA reactors to vaporize sulfur and regenerate the catalyst. The vaporized sulfur is recovered in the condenser. The effluent from the condenser is passed to the other CBA reactor which is operated in the recovery mode during regeneration.
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"MCRC Process for Improving Claus Plant Recovery"-A. B. Coady 6-9-1976, Presented to Canadian Natural Gas Processors' Assoc.
"MAXISULF-A Process to Enhance Sulphur Recovery in Claus Plants"-R. Lell and U. Neumann, Davy McKee AG.
"The MCRC Sub-Dewpoint Sulphur Recovery Process"-R. E. Heigold and D. E. Berkeley Delta Projects Limited.
Russel Jeffrey E.
Standard Oil Company (Indiana)
Thomas Earl C.
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