Patent · US Active

Method for producing isocyanates

US10577311B2 · kind B2 · utility

1Cited by

18References

17Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Thomas Knauf · Dormagen, DE
Dirk Manzel · Moers, DE
Peter Plathen · Krefeld, DE
Jürgen Spriewald · Kölln-Reisiek, DE

Key dates

Filing date	Sep 20, 2016
Grant date	Mar 3, 2020
Priority date	—
Expiry date	Sep 20, 2036

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/24
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a method for an economically and technically improved embodiment of a production interruption in a production method for isocyanates by phosgenation of the corresponding amines, in which the entire production plant is not closed while one or more parts of the plant is taken out of operation, rather the input materials and/or reaction products available in the production plant are recirculated through at least one part of the plant that has not been taken out of operation. The invention further relates to a plant for producing isocyanates and to a method for operating a plant for producing isocyanates.

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