Process for making a lead-tolerant catalyst system for purifying

Details Process for making a lead-tolerant catalyst system for purifying Process for making a lead-tolerant catalyst system for purifying

1984-06-20

1985-09-03

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502328, 4232135, B01J 2104, B01J 2310, B01J 2378

Patent

active

045393117

ABSTRACT:
A process for improving the lead tolerance of a motor vehicle exhaust purification catalyst system of the type comprising a platinum group metal catalyst carried on alumina. The improvement derives from impregnating the alumina with barium moiety and firing at at least 400.degree. C. before subsequent impregnation with the metal catalyst moiety.

REFERENCES:
patent: 3819536 (1974-06-01), Dalla Betta et al.
patent: 3894140 (1975-07-01), Warshaw
patent: 3966391 (1976-06-01), Hindin et al.
patent: 4279782 (1981-07-01), Chapman et al.
patent: 4331565 (1982-05-01), Schaefer et al.

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