Patent · US Active

Method for preparing a carbamate, a catalyst applied in the method, a method for preparing the catalyst and use thereof

US8450518B2 · kind B2 · utility

0Cited by

8References

9Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Youquan Deng · Lanzhou, CN
Liguo Wang · Huangyang, CN
Yubo Ma · Lanzhou, CN
Xiaoguang Guo · Lanzhou, CN
Stefan Wershofen · Mönchengladbach, DE
Stephan Klein · Mettmann, DE
Hongchao Li · Dongguan, CN

Key dates

Filing date	Apr 12, 2010
Grant date	May 28, 2013
Priority date	—
Expiry date	Apr 23, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/14
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention pertains to a novel method for preparing a carbamate, in which the method comprises reacting an aliphatic substituted urea and/or its derivatives, with a hydroxyl group containing compound to obtain a carbamate. In addition, the present invention provides a novel catalyst which is suitable for catalyzing the reaction to form a carbamate, and a method for preparing the novel catalyst. The method of the present invention for preparing a carbamate does not involve the application of carbon monoxide which is toxic, and the reaction conditions are relatively mild with high catalytic activity, high reaction selectivity of the catalyst, and a relatively short reaction time. Furthermore, the catalyst is separated from the reaction system and reused easily, which will facilitates scale up and industrial application.

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