Bayer Materialscience Ag

Liguo Wang

Stefan Wershofen

Stephan Klein

Youquan Deng

Yubo Ma

Xiaoguang Guo

Hongchao Li

Zhiping Zhou

Shiguo Zhang

Yude He

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.

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

The present invention pertains to a catalyst for the synthesis of organic alkyl carbamates, the method for preparing the same and the use thereof. The catalyst comprises a catalytically active component and a catalyst support, and the catalytically active component being carried by the catalyst support, wherein the catalytically active component comprises a transition metal oxide, and the general formula of the transition metal oxide is EOx, wherein E is selected from transition metal element and x is in the range of 0.5-4.

Catalyst for the synthesis of alkyl carbamates, the method for preparing the same and the use thereof

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Gansu, China

Liguo Wang