Process for the preparation of trioxane and polyoxymethylene copolymers

US6388102B2 · kind B2 · utility

Assignee

• Ticona LLC · US

Inventors

• Elke Schweers · Bad Soden, DE
• Thomas Kaiser · Kelkheim, DE
• Michael Haubs · Bad Kreuznach, DE
• Michael Rosenberg · Niedernhausen, DE

Key dates

• Filing date: Jul 9, 2001
• Grant date: May 14, 2002
• Expiry date: Jul 9, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Processes for making trioxane, polyoxymethylene and polyoxymethylene copolymers from formaldehyde, made by the dehydrogenation of methanol in the presence of a catalytic active species set free from a sodium compound, at a temperature in the range of 300° C. to 1000° C., wherein a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.