Patent · US Active

Method for producing isocyanates in the gas phase

US9328064B2 · kind B2 · utility

1Cited by

5References

6Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Rainer Bruns · Leverkusen, DE
Wolfgang Lorenz · Dormagen, DE
Andreas Rausch · Regensburg, DE
Stefan Wershofen · Mönchengladbach, DE
Tim Loddenkemper · Dormagen, DE

Key dates

Filing date	Jul 2, 2015
Grant date	May 3, 2016
Priority date	—
Expiry date	Jul 2, 2035

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 preparation of isocyanates by reaction of the corresponding amines with phosgene in the gas phase, wherein a diluent containing between 90.0000% by weight and 99.9999% by weight of substances which are inert in the phosgenation process and between 0.0001% by weight and 10.0000% by weight of oxygen is present during the conversion of the amine into the gas phase and the molar ratio of amine to oxygen (O2) is ≧1,000:1.

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