Patent · US Active

Silica-based zinc catalysts, their preparation and use in the alkoxycarbonylation of amines

US10807084B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Stefan Wershofen · Mönchengladbach, DE
Markus Dugal · Kempen, DE
Gernot Jaeger · Cologne, DE
Anton Vidal Ferran · Montbrió del Camp, ES
Jose Luis Nuñez Rico · Tarragona, ES

Key dates

Filing date	May 14, 2018
Grant date	Oct 20, 2020
Priority date	—
Expiry date	May 14, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2540/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to silica-based heterogeneous zinc compounds which are suitable as catalysts in the reaction of amines with dialkyl carbonates to produce carbamates. The catalysts have the formula [SiO2]—CH2—CHR—X—COOZn[Y], wherein [SiO2] represents a silica carrier selected from the group consisting of ordered mesoporous silica and irregular amorphous narrow pore silica, R represents a moiety selected from the group consisting of hydrogen, —CH3, and —CH2CH3, preferably hydrogen, X is an aliphatic chain of 2 to 11 carbon atoms that optionally comprises ether moieties and [Y] represents a mono anion. The invention is also directed towards a method for the preparation of the aforementioned compounds and towards method for the alkoxycarbonylation of amines.

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