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

1990-02-09

1992-04-21

McFarlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208113, 208149, 208152, 209 8, 209636, C10G 1104, C10G 1118

Patent

active

051064863

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: 2956004 (1960-10-01), Conn et al.
patent: 3092568 (1963-06-01), Atteridg
patent: 4334920 (1982-06-01), Mori et al.
patent: 4406773 (1983-09-01), Hettinger et al.
patent: 4835128 (1989-05-01), Child et al.

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