Hydrothermal alkali metal catalyst recovery process

Details Hydrothermal alkali metal catalyst recovery process Hydrothermal alkali metal catalyst recovery process

1978-01-27

1979-06-05

Bashore, S. Leon

Gas: heating and illuminating

Processes

Fuel mixtures

48210, 208 10, 252412, 562513, C10J 306, C10D 502

Patent

active

041572467

ABSTRACT:
In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein solid particles containing alkali metal residues are produced, alkali metal constituents are recovered from the particles primarily in the form of water soluble alkali metal formates by treating the particles with a calcium or magnesium-containing compound in the presence of water at a temperature between about 250.degree. F. and about 700.degree. F. and in the presence of added carbon monoxide. During the treating process the water insoluble alkali metal compounds comprising the insoluble alkali metal residues are converted into water soluble alkali metal formates. The resultant aqueous solution containing water soluble alkali metal formates is then separated from the treated particles and any insoluble materials formed during the treatment process, and recycled to the gasification process where the alkali metal formates serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst. This process permits increased recovery of alkali metal constituents, thereby decreasing the overall cost of the gasification process by reducing the amount of makeup alkali metal compounds necessary.

REFERENCES:
patent: 820374 (1906-05-01), Weise et al.
patent: 1574875 (1926-03-01), Enderli
patent: 2043534 (1936-06-01), Karlsruhe et al.
patent: 4057512 (1977-11-01), Vadovic et al.

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