Reducing precious metal use in catalyst substrates

Details Reducing precious metal use in catalyst substrates Reducing precious metal use in catalyst substrates

1981-04-28

1982-07-20

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252472, 252477R, 422180, B01J 2104, B01J 2340, B01J 3504

Patent

active

043405053

ABSTRACT:
A precious metal coated interior and uncoated exterior catalyst is formed from a cylindrical substrate with a circumferential periphery and an interior honeycomb structure. A jacket of liquid impermeable material is wrapped around the substrate circumferential periphery, and the jacket ends are fastened together with hook-and-pile fasteners or the like. The wrapped cylindrical catalyst substrate is passed through a shower of precious metal liquid solution or suspension so that the honeycomb structure surfaces are coated with precious metal. Because the jacket is disposed around the substrate circumferential periphery, the circumferential periphery does not get coated. The jacket is removed by disconnecting the hook-and-pile fasteners, and the jacket can be rinsed off with a rinse liquid and the used rinsed liquid may be collected and used for subsequent substrate showers. The jacket is reuseable to wrap other substrates.

REFERENCES:
patent: 3771967 (1973-11-01), Nowak
patent: 3941159 (1976-03-01), Toll
patent: 4282279 (1981-08-01), Strickland
patent: 4289652 (1981-09-01), Hunter et al.

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