Patent · US Expired

Method for producing isocynates

US6833469B2 · kind B2 · utility

4Cited by

2References

7Claims

0Family size

Assignee

BASF SE

Inventors

Andreas Wölfert · Bad Rappenau, DE
Christian Müller · Mannheim, DE
Eckhard Stroefer · Mannheim, DE

Key dates

Filing date	Dec 10, 2003
Grant date	Dec 21, 2004
Priority date	—
Expiry date	Dec 10, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C263/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the production of isocyanates by reaction of primary amines with phosgene, in which isocyanate is used as solvent, wherein some or all of isocyanate used as solvent is added to the reaction mixture only after the amine and phosgene have been physically combined.

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