Patent · US Active

Process for preparing isocyanates

US8759568B2 · kind B2 · utility

3Cited by

3References

12Claims

0Family size

Assignee

BASF SE

Inventors

Vanessa Simone Lehr · Mannheim, DE
Carsten Knoesche · Niederkirchen, DE
Torsten Mattke · Ludwigshafen am Rhein, DE

Key dates

Filing date	Apr 7, 2010
Grant date	Jun 24, 2014
Priority date	—
Expiry date	Feb 2, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C263/20
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene, optionally in the presence of an inert medium, in which phosgene and amine are first mixed and converted to the isocyanate in a reactor, and in which a reaction gas which comprises isocyanate and hydrogen chloride leaving the reactor is cooled in a quench by adding a liquid quench medium to form a mixture of reaction gas and quench medium as the product stream. The walls of the quench are essentially completely wetted with a liquid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.