Process for the preparation of a microspheroidal catalyst

Details Process for the preparation of a microspheroidal catalyst Process for the preparation of a microspheroidal catalyst

2007-01-23

2007-01-23

Lorengo, J. A. (Department: 1755)

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S325000, C502S327000, C502S328000, C502S331000, C502S332000, C502S333000, C502S339000, C502S527120, C502S527130

Reexamination Certificate

active

10502299

ABSTRACT:
Process for preparing a catalyst active for the fluid bed acetoxylation of ethylene to produce vinyl acetate. The process comprises the steps of (a) impregnating microspheroidal silica support particles by the incipient wetness technique with an aqueous solution of palladium and gold compounds, whilst agitating the support particles; (b) drying the impregnated support particles produced in step (a) whilst agitating the impregnated support particles; (c) reducing the palladium and gold compounds of the impregnated support particles produced in step (b) to respective metals by adding the dried, impregnated support particles to an aqueous solution of hydrazine, whilst stirring, to form a slurry; (d) filtration of the slurry produced in step (c) to remove the excess reduction solution; (e) washing the filter cake/slurry produced in step (d) with water and removing excess water to form a cake; (f) impregnating the cake produced in step (e) with one or more salts of Group I, Group II, lanthanide and transition metals by blending the cake produced in step (e) with one or more solid salts of Group I, Group II, lanthanide and transition metals; and (g) drying the impregnated cake produced in step (f) whilst agitating the impregnated cake to form free-flowing catalyst particles.

REFERENCES:
patent: 3743607 (1973-07-01), Sennewald et al.
patent: 4801573 (1989-01-01), Eri et al.
patent: 5179056 (1993-01-01), Bartley
patent: 5189004 (1993-02-01), Bartley
patent: 5466652 (1995-11-01), Paparizos et al.
patent: 5674800 (1997-10-01), Abel et al.
patent: 5783726 (1998-07-01), Lemanski et al.
patent: 6395676 (2002-05-01), Blum et al.
patent: 6399813 (2002-06-01), Blum et al.
patent: 6528453 (2003-03-01), Baker et al.
patent: 6534438 (2003-03-01), Baker et al.
patent: 6806382 (2004-10-01), Baker et al.
patent: 6849243 (2005-02-01), Hagemeyer et al.
patent: 31 19 707 (1982-12-01), None
patent: 0 672 453 (1995-09-01), None
patent: 1 250 265 (1971-10-01), None
patent: 1 266 623 (1972-03-01), None
patent: 1 314 225 (1973-04-01), None

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