Separating off trioxane from gaseous mixtures with formaldehyde

US6121467A · kind A · utility

Assignee

• Ticona LLC · US

Inventors

• Hagen Kniep · Frankfurt, DE
• Christine Meister · Pocking, DE
• Elke Schweers · Bad Soden, DE
• Ioannis Nicolaou · Kelkheim, DE
• Dirk Scheid · Idstein, DE

Key dates

• Filing date: Jul 23, 1999
• Grant date: Sep 19, 2000
• Expiry date: Jul 23, 2019

Classification

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

Abstract

The invention relates to a method for separating a gaseous mixture comprising formaldehyde and trioxane, wherein at least some of the formaldehyde and the trioxane are dissolved from the mixture in a alcohol-containing liquid and the trioxane is crystallized from the solution thus obtained and is separated.