Recovery of catalyst from coal liquefaction residues

Details Recovery of catalyst from coal liquefaction residues Recovery of catalyst from coal liquefaction residues

1982-06-01

1984-02-28

Wright, William G.

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 8LE, 208 11LE, C10G 106, C10G 100

Patent

active

044340435

ABSTRACT:
Metal constituents are recovered from the heavy bottoms produced during the liquefaction of coal and similar carbonaceous solids in the presence of a catalyst containing metal constituents by reducing the carbonaceous content of the heavy bottoms, contacting the resultant heavy bottoms deficient in carbonaceous material with an aqueous solution of a mineral acid in the presence of an added alcohol and an added oxidizing agent to extract the metal constituent from the insoluble catalyst residues into the aqueous solution, and using the metal constituents extracted as constituents of the catalyst. Preferably, the metal constituent comprising the catalyst is molybdenum, the mineral acid is sulphuric acid, hydrochloric acid or phosphoric acid, the oxidizing agent is hydrogen peroxide and the alcohol is methanol. In a preferred embodiment of the invention, the carbonaceous content of the heavy bottoms is reduced by subjecting the heavy bottoms to a solvent extraction at elevated temperature and pressure with a hydrocarbon solvent in the presence of molecular hydrogen.

REFERENCES:
patent: 3539290 (1970-11-01), Erickson et al.
patent: 3657108 (1972-04-01), Kiovsky et al.
patent: 3813329 (1974-05-01), Gatsis
patent: 3923634 (1975-12-01), Silvestri et al.
patent: 4102774 (1978-07-01), Carr et al.
patent: 4224137 (1980-09-01), Schroeder
patent: 4239613 (1980-12-01), Schulz
patent: 4278443 (1981-07-01), Beuther et al.

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