Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1993-06-08
1994-11-15
Warden, Robert J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
422144, 422147, 502 21, 502 84, 502305, 502324, B01J 2116, B01J 2334, B01J 2374, B01J 3872
Patent
active
053648277
ABSTRACT:
By continuously or intermittently adding amounts of magnetically active moieties, e.g. iron compounds, over time so that the moiety deposits on a catalyst or sorbent in a fluid catalytic cracker or similar circulating hydrocarbon conversion unit, older catalyst, being more magnetic, can be readily separated from catalyst which has been in the system a shorter time. Separation is readily accomplished by passing the catalyst and/or sorbent through a magnetic field and discarding the more magnetic 50% by wt. or more preferably 20% by wt., while recycling the remainder back to the hydrocarbon conversion unit.
REFERENCES:
patent: 2348418 (1944-05-01), Roesch et al.
patent: 4280896 (1981-07-01), Bearden et al.
patent: 4359379 (1982-11-01), Ushio et al.
patent: 4406773 (1983-09-01), Hettinger, Jr. et al.
patent: 4425259 (1984-01-01), Hettinger, Jr. et al.
patent: 4549958 (1985-10-01), Beck et al.
Benslay Roger M.
Hettinger William P.
Ashland Oil Inc.
Crawford L. M.
Warden Robert J.
Willson, Jr. Richard C.
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