Patent · US Active

Process for the preparation of urethanes

US9475762B2 · kind B2 · utility

0Cited by

4References

7Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Andreas Jacob · Munich, DE
Stefan Wershofen · Mönchengladbach, DE
Stephan Klein · Mettmann, DE
Jörg Sundermeyer · Marburg, DE
Fuming Mei · Hubei, CN

Key dates

Filing date	Feb 4, 2016
Grant date	Oct 25, 2016
Priority date	—
Expiry date	Feb 4, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C273/1809
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Urethanes are prepared by oxidative carbonylation of at least one amino compound in the presence of carbon monoxide, oxygen and organic, at least one hydroxyl-group-carrying compound. The carbonylation is carried out in the absence of halogen-containing promoters. The carbonylation is also carried out in the presence of a metal complex catalyst which contains neutral bidentate N-chelate ligands of the (N˜N) type, two monoanionic N,O-chelate ligands of the general type (N˜O)− or tetradentate dianionic chelate ligands (O˜N˜N˜O)2−.

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