Gas: heating and illuminating – Processes – Fuel mixtures
Patent
1978-05-08
1980-03-18
Bashore, S. Leon
Gas: heating and illuminating
Processes
Fuel mixtures
48202, 48210, 252412, 252413, 252420, 208 9, 423206R, 423208, C10J 306
Patent
active
041937716
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 in the gasifier or similar reaction zone, alkali metal constitutents are recovered from the particles by withdrawing and passing the particles from the reaction zone to an alkali metal recovery zone in the substantial absence of molecular oxygen and treating the particles in the recovery zone with water or an aqueous solution in the substantial absence of molecular oxygen. The solution formed by treating the particles in the recovery zone will contain water-soluble alkali metal constituents and is recycled to the conversion process where the alkali metal constituents serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst. Preventing contact of the particles with oxygen as they are withdrawn from the reaction zone and during treatment in the recovery zone avoids the formation of undesirable alkali metal constituents in the aqueous solution produced in the recovery zone and insures maximum recovery of water-soluble alkali metal constituents from the alkali metal residues.
REFERENCES:
patent: 3033647 (1962-05-01), Yamazaki
patent: 3998607 (1976-12-01), Wesselhoft et al.
patent: 4057512 (1977-11-01), Vadovic et al.
"Coal Gasif. with Chemically Incorporated Catalysts", O'Hara, Synthetic Fuels Process Research Digest, Nov. 1977.
Clavenna LeRoy R.
Gorbaty Martin L.
Sharp David W.
Tsou Joe M.
Bashore S. Leon
Exxon Research & Engineering Co.
Finkle Yale S.
Kratz Peter F.
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