Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1988-01-15
1989-06-13
McFarlane, Anthony
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
20415751, 372 59, 502 38, 502339, 502352, B01J 3810, B01J 3812
Patent
active
048393304
ABSTRACT:
A method of exchanging rare-isotope oxygen for common-isotope oxygen in the top several layers of an oxide-containing catalyst is disclosed. A sample of an oxide-containing catalyst is exposed to a flowing stream of reducing gas in an inert carrier gas at a temperature suitable for the removal of the reactive common-isotope oxygen atoms from the surface layer or layers of the catalyst without damaging the catalyst structure. The reduction temperature must be higher than any at which the catalyst will subsequently operate. Sufficient reducing gas is used to allow removal of all of the reactive common-isotope oxygen atoms in the top several layers of the catalyst. The catalyst is then reoxidized with the desired rare-isotope oxygen in sufficient quantity to replace all of the common-isotope oxygen that was removed.
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Brown Kenneth G.
Hess Robert V.
Hoyt Ronald F.
Miller Irvin M.
Schryer David R.
Glenn Charles E. B.
Helfrich George F.
Manning John R.
McFarlane Anthony
The United States of America as repesented by the Administrator
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