Process for the preparation of diisocyanates

US6930199B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Jürgen Meyn · Dormagen, DE
• Herbert Stutz · Karlsruhe, DE

Key dates

• Filing date: Dec 13, 2004
• Grant date: Aug 16, 2005
• Expiry date: Dec 13, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/141
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of isocyanates in the gas phase, in which the possibilities for back-mixing and byproduct formation are reduced by improving the mixing of the starting materials in a tubular reactor.