Addition of magnetically active moieties for magnetic beneficiat

Details Addition of magnetically active moieties for magnetic beneficiat Addition of magnetically active moieties for magnetic beneficiat

1991-10-04

1993-07-27

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

208 52CT, 208120, 208124, 208152, 209 8, 422147, B03C 100, C10B 5510, C10G 1102, F27B 1508

Patent

active

052308693

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: 4482450 (1984-11-01), Ushio et al.

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