Chemistry of inorganic compounds – Sulfur or compound thereof – Elemental sulfur
Patent
1983-07-29
1984-11-13
Thomas, Earl C.
Chemistry of inorganic compounds
Sulfur or compound thereof
Elemental sulfur
423576, C01B 1704
Patent
active
044825323
ABSTRACT:
A three catalytic reactor system and process is disclosed for obtaining acceptable levels of sulfur recovery from acid gas at a cost significantly less than that required for a standard four reactor cold bed adsorption (CBA) system. The system and process of the present invention utilizes two conventional Claus reactors and one cold bed adsorption (CBA) reactor in series. Four condensers are provided, one disposed before each of the catalytic reactors, and one on a process line connecting the third catalytic (CBA) reactor to the first catalytic (Claus) reactor. The system is designed to operate either in an adsorption mode or in a regeneration mode. In the adsorption mode, the system is similar to a standard CBA system except that the present invention incorporates only one CBA reactor while a standard CBA system incorporates two CBA reactors. In the regeneration mode, however, the CBA reactor of the present invention is operated in the same manner as the first Claus reactor in adsorption mode. Heated gas downstream of the thermal reactor is used to regenerate the CBA reactor. The effluent from the regenerated CBA reactor is directed through a heater and then to the first Claus reactor.
REFERENCES:
patent: Re28830 (1976-05-01), Hunt, Jr. et al.
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patent: 3749762 (1973-07-01), Montgomery
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patent: 4309402 (1982-01-01), Al-Muddaris
patent: 4315904 (1982-02-01), Lell et al.
"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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