Process for the continuous manufacture of trioxane

US4504670A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hartmut Voigt · Frankfurt am Main, DE
• Karl-Friedrich Muck · Wiesbaden, DE
• Helmut Bar · Offenbach am Main, DE
• Herbert Mader · Nauheim, DE
• Karlheinz Burg
• Gunter Sextro · Wiesbaden, DE

Key dates

• Filing date: Oct 6, 1983
• Grant date: Mar 12, 1985
• Expiry date: Oct 6, 2003

Classification

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

Abstract

The invention provides a process for the continuous manufacture of trioxan, optionally together with cyclic formals, from aqueous formaldehyde solutions in a circulation reactor with evaporator, the vapor/liquid mixture leaving the evaporator is fed in below the liquid level of the reaction mixture. The process of the invention allows to attain especially high space/time yields.