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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) Application No.: 00088/KOL/2004 A
(22) Date of filing of Application: 03.03.2004 (43) Publication Date: 09/06/2006
(54) Title of the invention: CATALYST, PROCESS FOR PRODUCING THE CATALYST AND PROCESS FOR PREPARING
VINYL ACETATE USING THE CATALYST
(51) International classification : B01J 37/02, 21/08,
23/44, 23/52
(31) Priority Document No : 19754992.6
(32) Priority Date : 11.12.1997
(33) Name of priority country : GERMANY
(86) International Application No and : NA
Filing Date
:
(87) International Publication No : NA
(61) Patent of addition to Application No : NA
Filed on : NA
(62) Divisional to Application No : 2020/CAL/1998
Filed on : 16/11/1998
(71) Name of Applicant:
CELANESE GMBH
Address of the Applicant:
LURGIALLEE 14, D-60439 FRANKFURT,
FEDERAL REPUBLIC OF GERMANY
(72) Name of the Inventor:
BERNHARD HERZOG
Filed U/S 5(2) before The Patents (Amendment)
Act, 2005: NO
(57) Abstract:
The present process allows the production of a catalyst for preparing vinyl acetate in the gas phase from ethylene, acetic acid and
oxygen or oxygen-containing gases. The catalyst comprises palladium and/or its compounds, gold and/or its compounds and also
alkali metal compounds on a particulate, porous support, and is produced by
a) impregnating the support with soluble palladium and gold compounds,
b) converting the soluble palladium and gold compounds into insoluble palladium and gold compounds by addition of an
alkaline solution to the support,
C) reducing the insoluble palladium and gold compounds on the support by means of a reducing agent in the liquid or
gaseous phase,
d) impregnating the support with at least one soluble alkali metal compound and
e) finally drying the Support at a maximum of 150 0 C,
wherein the catalyst is irradiated with microwaves before , during or after one of the process steps a) to e).
(FIG.nil)
The Patent Office Journal 09/06/2006 10954