Process for the preparation of trioxane

US5508448A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gerhard Emig · Erlangen, DE
• Benno Kruger · Idstein, DE
• Frank Kern · Kandel, DE
• Michael Hoffmockel · Niedernhausen, DE
• Karl-Friedrich Muck · Wiesbaden, DE
• Gunter Sextro · Wiesbaden, DE

Key dates

• Filing date: Dec 30, 1993
• Grant date: Apr 16, 1996
• Expiry date: Dec 30, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D323/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

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.