Ep 0095783 A2
Europaisch.es Patentamt European Patent Office ® Publication number: 0 095 783 A2 Office europeen des brevets ® EUROPEAN PATENT APPLICATION © Application number: 83105450.7 ® Int. CI.3: C 07 C 45/74, C 07 C 49/203, C 07 C B 01 J ^ 49/603, 29/04, @ Dateof filing: 01.06.83 B 01 J 21/16 (§) Priority: 02.06.82 US 384212 @ Applicant: UNION CARBIDE CORPORATION, Old Ridgebury Road, Danbury Connecticut 06817 (US) @@on ~ ... ,.... ,... nun on ^(7?) Inventor: Reichle, Walter Thomas, 158 Mountain Avenue, j^J/^ Warren New Jersey 07060 (US) @ Representative : Wuesthoff , Franz, Dr.-lng. et al, Patentanwalte Wuesthoff -v. Pechmann-Behrens-Goetz @ Designated Contracting States : DE FR GB Schweigerstrasse 2, D-8000 Miinchen 90 (DE) @ Catalyzed aldol condensations. Heat treated anionic clay mineral is an improved catalyst for the conversion of acetone to mesityl oxide and isophorone as well as for the aldol condensation of other carbonyl-contain- ing compounds. BACKGROUND OF THE INVENTION This invention pertains to aldol condensations catalyzed by heat-treated synthetic anionic clay minerals ana more particularly to the use of these catalysts ror the conversion of acetone to mesityl oxide and isophorone. The alaol condensation of active hydrogen-containing organic carbonyl compounds has found wide use in the chemical industry for the synthesis of a myriad of organic compounds. The earliest catalysts used for this conaensation reaction were bases, such as, alkali metal hydroxides which have been used for the production of 2-ethylhexanediol-l, 3, 2-ethylhexanol-l, diacetone alcohol, isopnorone, mesityl oxide, methylisoamyl ketone, and methylisobutyl ketone. A variety of methods has been disclosed in the literature for converting, for example, acetone by aldol condensation into a wide spectrum of products particularly isophorone and mesityl oxide which are used in industrial solvents and as chemical intermediates for resins, dyes, intersecticiaes.
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