Patent · US Active

Process for the preparation of isocyanates

US8765991B2 · kind B2 · utility

2Cited by

2References

7Claims

0Family size

Assignee

Bayer Intellectual Property GmbH · DE

Inventors

Jürgen Kintrup · Leverkusen, DE
Peter Lehner · Baytown, US
Eric Jakobs · Krefeld, DE
Alfred Soppe · Issum, DE
Knud Werner · Krefeld, DE

Key dates

Filing date	Nov 30, 2012
Grant date	Jul 1, 2014
Priority date	—
Expiry date	Dec 25, 2032

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 in a system network comprising an isocyanate production plant, a chlorine production plant and a phosgene production plant, in which carbon dioxide formed as a by-product is partially to completely condensed out with the gaseous chlorine formed in the chlorine production plant and enters into the phosgene preparation process and, after the preparation of phosgene, the predominant part of the carbon dioxide formed is thereby sluiced out of the system network in gaseous form.

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