Process for preparing isocyanates

US8816126B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Torsten Mattke · Ludwigshafen am Rhein, DE
• Gerhard Olbert · Dossenheim, DE

Key dates

• Filing date: Aug 16, 2012
• Grant date: Aug 26, 2014
• Expiry date: Aug 16, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C263/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for preparing isocyanates by reacting the corresponding amines comprised in at least one feed stream A with phosgene comprised in at least one feed stream P in a reaction plant comprising at least one mixing zone and at least one reaction zone, wherein feed stream A and/or feed stream P optionally comprise one or more inert materials and,during periods of time in which the flow Sx of the amine used is below the flow S0 of the amines used during operation at the nominal capacity of the reactor plant,