Catalyst demetallization by converting the metal poisons to a su

Details Catalyst demetallization by converting the metal poisons to a su Catalyst demetallization by converting the metal poisons to a su

1977-01-03

1981-10-06

Konopka, P. E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208113, 2524115, 252412, 252413, 423 68, 423150, C10G 1105, C10G 1100, B01J 2938, B01J 2120

Patent

active

042934036

ABSTRACT:
A process for the removal of metal poisons such as nickel, iron and/or vanadium from a hydrocarbon conversion catalyst which includes the step of contacting the catalyst with a sulfur-containing compound to convert at least a portion of the metals on the catalyst to a sulfur-containing metal compound. The weight % sulfur on the thus treated catalyst is controlled to about 40-90%, preferably about 40-75%, of the weight % of the total nickel, vanadium and iron on the catalyst. Preferably, the sulfur-containing compound is hydrogen sulfide in admixture with a reducing gas such as hydrogen and/or carbon monoxide. This step facilitates metal removal in subsequent processing steps.

REFERENCES:
patent: 3147228 (1964-09-01), Erickson
patent: 3148155 (1964-09-01), Schwartz
patent: 3234145 (1966-02-01), Foster
patent: 3236761 (1966-02-01), Rabo et al.
patent: 3562150 (1971-02-01), Hamilton

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