Oxidative revivification of molecular sieve catalysts admixed wi

Details Oxidative revivification of molecular sieve catalysts admixed wi Oxidative revivification of molecular sieve catalysts admixed wi

1975-05-09

1976-10-26

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252412, 252416, 208111, 208120, 208149, B01J 2938

Patent

active

039882608

ABSTRACT:
Molecular sieve catalyst compositions having decreased catalytic activity as a result of accumulating more than 2 weight-% carbonaceous coke deposits are restored essentially to their pre-coked activity by heating an essentially homogeneous mixture of particles thereof with particles of an inert refractory material in the weight ratio of from 1:2 to 1:10 in air at a temperature of from 500.degree. C. to 725.degree. C. for a period of time sufficient to decrease the carbonaceous coke to less than two weight percent.

REFERENCES:
patent: 2892771 (1959-06-01), Milliken, Jr.
patent: 3301792 (1967-01-01), Lewallen
patent: 3692692 (1972-09-01), Ward et al.
patent: 3761400 (1973-09-01), Mitchell

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