Process for preparation and preferably distillative workup of diphenylmethane diisocyanate (MDI)

US8703997B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Christian Schneider · Mannheim, DE
• Nikolaus Zafred · Ludwigshafen, DE
• Andreas Heussler · Haßloch, DE
• Leo Denissen · Brasschaat, BE
• Lucia Koenigsmann · Stuttgart, DE

Key dates

• Filing date: Oct 20, 2010
• Grant date: Apr 22, 2014
• Expiry date: Mar 12, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/36
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

What is proposed is a process for preparation and distillative workup of diphenylmethane diisocyanate (MDI), proceeding from a benzene-comprising feedstream, in which, in