Binary LA-PA oxide catalyst and method of making the catalyst

Details Binary LA-PA oxide catalyst and method of making the catalyst Binary LA-PA oxide catalyst and method of making the catalyst

1992-06-05

1993-08-10

Shine, W. J.

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

Catalyst or precursor therefor

Silicon containing or process of making

502303, 4242135, B01J 2310, B01J 2344

Patent

active

052348814

ABSTRACT:
A catalyst having high temperature (800.degree.-1050.degree. C.) stability and improved three-way automotive exhaust gas catalyst activity at high temperatures, comprising an outer catalytic coating of binary La-Pd oxide (La.sub.2 Pd.sub.2 O.sub.5 or La.sub.4 PdO.sub.7) calcined and supported on a catalyst-supporting substrate, the oxide being present in an amount to provide 15-150 g of Pd per cubic foot of the substrate
A method of making binary La-Pd oxides useful as an automotive exhaust catalyst operative at high temperatures, comprising heating in an oxidizing atmosphere a mixture containing La compounds and Pd compounds in a La:Pd ratio of 1:1 or 4:1, the heating being staged to first heat slowly from about 50.degree. C. to start decomposition of the compounds and thereafter retaining the residue at an elevated temperature to stimulate growth of crystalline binary La-Pd oxides and to calcine the crystalline oxides.
A method of making an automotive catalyst by suspending binary La-Pd oxides in a sol (preferably alumina sol) and depositing and fixing such sol suspension on a substrate coated with conventional washcoats.

REFERENCES:
patent: 4127510 (1978-11-01), Harrison et al.
patent: 4182694 (1980-01-01), Lauder
Acta Crystallography, vol. B44, p. 563, 1988, Attfield.
Journal Solid State Chem., vol. 80, p. 286, 1989, Attfield et al.
SAE Paper #760201, 1976, Gandhi et al.

Affiliated with

Also associated with

Rating

Binary LA-PA oxide catalyst and method of making the catalyst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Binary LA-PA oxide catalyst and method of making the catalyst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Binary LA-PA oxide catalyst and method of making the catalyst will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1725046