Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1979-12-28
1981-12-01
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252412, 252415, 562532, 562534, 562535, B01J 2728, C07C 5125, C07C 57055
Patent
active
043035507
ABSTRACT:
The present invention relates to a method for the regeneration of deactivated PMA based catalysts by imbibing an aqueous volatile base within the pore structure of the deactivated catalyst so as to form a fluid phase within the pore structure, adding a volatile acid to the fluid phase to form a precipitate. The precipitate is thereafter dried and calcined to yield the regenerated catalyst. A second method for regeneration is also provided and includes the steps of imbibing a volatile solvent within the pore structure of the deactivated catalyst, adding a volatile acid to the system, and then adding a volatile base to the system to form a precipitate within the pore structure. The precipitate is again dried and calcined to yield the regenerated catalyst.
REFERENCES:
patent: 1923652 (1933-08-01), Winkler et al.
patent: 2973326 (1961-02-01), Hodgins et al.
patent: 4083805 (1978-04-01), White
patent: 4138366 (1979-02-01), Shaw et al.
patent: 4165296 (1979-08-01), Ishii et al.
Callahan James L.
Miller Arthur F.
Shaw Wilfrid G.
Curatolo Joseph G.
Evans Larry W.
Knudsen Herbert D.
Konopka P. E.
Standard Oil Company
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