Preparation and application of dimethyl carbonate catalyst

Abstract

The invention relates to preparation and application of a dimethyl carbonate catalyst, and belongs to the technical field of catalyst preparation. According to the present invention, the alumina carrier is modified, the highly-dispersed nanometer palladium loaded on the surface of the carrier is prepared through the room temperature impregnation method so as to obtain the catalyst with excellent performance, the catalyst is used for carbonylation synthesis of dimethyl carbonate from carbon monoxide and methyl nitrite; the conversion rate of methyl nitrite achieves more than or equal to 60% andthe selectivity of dimethyl carbonate is higher than 80%, so that the alumina-based palladium catalyst prepared by the method is a catalyst with excellent conversion rate and selectivity.

Description

technical field

[0001] The invention relates to the preparation and application of a dimethyl carbonate catalyst, belonging to the technical field of catalyst preparation. Background technique

[0002] At present, dimethyl carbonate is an important organic chemical raw material with low toxicity, safe use and less pollution. At present, the methods for producing dimethyl carbonate at home and abroad mainly include three production methods: phosgene method, methanol liquid phase / gas phase oxidative carbonylation method, and transesterification synthesis method. The gas-phase oxidative carbonylation of methanol has developed rapidly and has a large scale of industrialization. The gas phase method was successfully developed by Dow Chemical Company of the United States in 1986, and this technology is also available in Yube, Japan.

[0003] At present, the catalysts used in the gas-phase methanol oxidative carbonylation method all use alumina as a carrier to support nano-pallad...