Dispersion enhanced PT group metal catalysts

Details Dispersion enhanced PT group metal catalysts Dispersion enhanced PT group metal catalysts

1991-12-09

1993-03-23

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

B01D 4500, B01D 4600

Patent

active

051961750

ABSTRACT:
A method of making a three-way catalyst based on platinum group metals, comprising: (a) impregnating an alumina substrate with a platinum group metal ion by contacting such substrate with an aqueous solution containing the platinum group metal in an amount of 0.1-5% by weight of alumina substrate and a water soluble acid that forms RCOOH with R being an alkyl or equivalent, said acid being present in an amount of 10-120% by weight of the alumina substrate, the pH of said solution being less than 4.0; and (b) drying and calcining the wetted substrate without sintering said substrate.
The three-way catalyst construction based on platinum group metals has enhanced catalytic activity. It comprises an alumina substrate and a platinum group metal impregnation layer thereover, said impregnation layer being comprised of raft-like particle structures, each having increased metal density resulting from the nesting of both small and large metal particles within a given volume.

REFERENCES:
patent: 4171287 (1979-10-01), Keith
patent: 4678770 (1987-07-01), Wan et al.

Affiliated with

Also associated with

Rating

Dispersion enhanced PT group metal catalysts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dispersion enhanced PT group metal catalysts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispersion enhanced PT group metal catalysts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1350204