Patent · US Active

Method for producing isocyanates in the gas phase

US8563767B2 · kind B2 · utility

0Cited by

5References

8Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Rainer Bruns · Leverkusen, DE
Wolfgang Lorenz · Dormagen, DE
Knut Sommer · Krefeld, DE

Key dates

Filing date	Jun 26, 2010
Grant date	Oct 22, 2013
Priority date	—
Expiry date	Sep 14, 2030

Classification

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

Abstract

An isocyanate is produced by continuously reacting an amine with phosgene in the presence of an inert substance in the gas phase. In this process, a phosgene-containing stream and a stream containing both the amine and the inert substance are fed into a reactor. The molar ratio of the inert substance to the amino groups in the stream is greater than 0 but less than 45 mol %. This molar ratio changes by no more than 99% during a 20 minute period.

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