Process for recovering volatile precious metals

Details Process for recovering volatile precious metals Process for recovering volatile precious metals

1982-08-26

1984-01-31

Mars, Howard T.

Chemistry: fischer-tropsch processes; or purification or recover

Including regeneration of catalyst

Solvent utilized

518700, 518725, 568902, 562519, C07C 2706

Patent

active

044290578

ABSTRACT:
A homogeneous catalytic process wherein a gaseous or vaporized reactant stream is continuously introduced into a liquid phase mixture containing (a) a volatile precious metal catalyst, and (b) methanol and/or ethanol as reactant or reaction product, at least a portion of the volatile precious metal being continuously removed from the liquid phase mixture by the effluent gas and/or vapor stream, and such effluent stream is an integral component of a cyclic process stream and/or a vent stream discharged from the process. The improvement is concerned with recovery of the volatilized precious metal and returning it to the liquid phase mixture which comprises passing one or both of said cyclic or vent streams through a liquid body of alcohol selected from the group consisting of methanol, ethanol and mixtures thereof at a temperature sufficiently low to effect the removal of at least a portion of the precious metal contained in said stream, and thereafter periodically or continuously introducing to the liquid phase mixture at least a portion of said liquid body containing the recovered precious metal.

REFERENCES:
patent: 2636046 (1953-04-01), Greshan
patent: 3904547 (1975-09-01), Aycock
patent: 4133966 (1979-01-01), Pretzer et al.

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