Fluidized cracking catalyst with in situ metal traps

Details Fluidized cracking catalyst with in situ metal traps Fluidized cracking catalyst with in situ metal traps

1994-02-25

1995-06-13

Langel, Wayne

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 79, B01J 29076

Patent

active

054242622

ABSTRACT:
A method is described for making a fluidized cracking catalyst having in situ highly dispersed metal traps which comprises (a) impregnating particles of a zeolite catalyst by the incipient wetness technique under sub-atmospheric conditions with a mixture of a tin compound and an antimony compound dissolved in an organic solvent, (b) stirring the impregnated catalyst in paste form while still under sub-atmospheric conditions, (c) heating the mixed catalyst in the presence of an oxygen-containing gas until dry, and repeating shops (a), (b) and (c) above until a desired level of said metals in the metal traps is achieved. In the incipient wetness technique, an appropriate amount of solvent is added to achieve proper transport of organometallic components, precursors of the metal traps, providing at the same time complete wetness of a given amount of catalyst without forming a layer of liquid on top of the catalyst. The impregnation procedure is usually repeated at least four times to obtain the desired metal loading.

REFERENCES:
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patent: 4025458 (1977-05-01), McKay
patent: 4083807 (1978-04-01), McKinney et al.
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patent: 4169784 (1979-10-01), Nielsen et al.
patent: 4255287 (1981-03-01), Bertus er al.
patent: 4489169 (1984-12-01), Bertus et al.

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