The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 1994
Filed:
Jul. 26, 1993
Dae C Park, Daejonjikhal, KR;
Sung Y Cho, Daejonjikhal, KR;
Korea Research Institute of Chemical Technology, Daejonjikhal, KR;
Abstract
The present invention relates to a catalyst, a process for preparing the catalyst and a process for using the catalyst to produce ethylidene diacetate. The conventional preparation methods of ethylidene diacetate suffer from difficulty in separating the catalyst from the product after completion of the reaction. The catalyst of the present invention is simply separated from the product by mere filtration following the completion of reaction. This is a result of using a heterogenized catalyst which is obtained by supporting a homogeneous catalyst in an inorganic carder. The catalyst of the present invention is of the general formula M.sub.a X where M is a compound of a group VIII transition metal, most preferably RhCl.sub.3 .multidot.xH.sub.2 O, and X is an inorganic carrier, preferably selected from the group consisting of kieselguhr, .gamma.-alumina, silica, TiO.sub.2, MgO, ZnO and activated charcoal. Ethylidene diacetate produced using the present method is useful as an intermediate for producing precision chemical articles or as a starting material for the production of vinyl acetate monomer.