The effects of catalyst composition on the catalytic production of dimethyl carbonate

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• 作者：Chin ; Chong Shik ; Shin ; Dongchan ; Won ; Gyongshik ; Ryu ; Joonsung ; Kim ; Hoon Sik ; et. al.
• 关键词：Dimethyl carbonate (DMC) ; Oxidative carbonylation ; Palladium compound ; Three-component catalyst ; Synergy effect
• 刊名：Journal of Molecular Catalysis A: Chemical
• 出版年：2000
• 出版时间：October 31, 2000
• 年：2000
• 卷：160
• 期：2
• 页码：315-321
• 全文大小：77.2 K

文摘

The synthesis of dimethyl carbonate (DMC) by oxidative carbonylation of MeOH has been studied in the presence of various catalyst systems. The effect of catalyst composition on the catalytic activity and product composition is investigated. A three-component catalyst system composed of PdCl₂(PPh₃)₂, Cu(OMe)₂ and Me₄NCl shows synergy effects in terms of the MeOH conversion (26 % ) and DMC selectivity (95 % ). The reaction performed in the presence of a single-component catalyst PdCl₂(PPh₃)₂ produces dimethoxy methane (DMM) as a major product with selectivity over 90 % , while the addition of Me₄NCl or Cu(OMe)₂ to PdCl₂(PPh₃)₂ results in the increase of DMC selectivity from 2 % to 60 % .