PROCESS FOR THE PRODUCTION OF 1,2-DIALKOXYETHENES

PROCESS FOR THE PRODUCTION OF 1,2-DIALKOXYETHENES

Dialkoxyethenes of the formula (I) where R1 to R4 are identical or different and are each straight-chain or branched alkyl or cycloalkyl or R2 and R3 may furthermore be hydrogen, aryl or alkenylaryl, and the aromatic may be substituted by further radicals, such as alkyl, alkoxy or halogens, are prep...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BERTLEFF, WERNER, HOELDERICH, WOLFGANG, KOEFFER, DIETER
Format: Patent
Sprache:eng ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:Dialkoxyethenes of the formula (I) where R1 to R4 are identical or different and are each straight-chain or branched alkyl or cycloalkyl or R2 and R3 may furthermore be hydrogen, aryl or alkenylaryl, and the aromatic may be substituted by further radicals, such as alkyl, alkoxy or halogens, are prepared by a process in which an alcohol of the formula R4 OH or R5 OH is eliminated from a trialkoxyethane of the formula (II) (II) where R1 to R4 have the above meanings and R5 is straight-chain or branched alkyl or cycloalkyl, in the presence of a zeolite and/or a phosphate and/or phosphoric acid or boric acid on a carrier and/or an acidic, untreated metal oxide as a catalyst. Zeolites of the pentasil type are preferably used as catalysts.