Hoechst Aktiengesellschaft

Benno Kruger

Michael Hoffmockel

Karl-Friedrich Muck

Gunter Sextro

Gerhard Emig

Frank Kern

In a process for the preparation of trioxane from formaldehyde in the gas phase in the presence of a catalyst, the catalyst employed is 11-molybdo-1-vanadophosphoric acid, H.sub.4 PVMo.sub.11 O.sub.40 .multidot.n H.sub.2 O (n=0-32). Advantages of this process are, inter alia, high space-time yields and the suppression of byproducts.

Process for the preparation of trioxane

A process for the catalytic preparation of trioxane from formaldehyde in the gas phase employs a catalyst comprising vanadyl hydrogenphosphate hemihydrate which may be unactivated or activated by steam. No byproducts were obtained in the process and the space-time yield is high. Deposits in the reactor do not occur.

Growing community of inventors

Waldems-Esch, Germany

Benno Kruger