A new type of support `bipyridine containing aromatic polyamide' to CuCl2 for synthesis of dimethyl carbonate (DMC) by oxidative carbonylation of methanol

✍ Scribed by Yasushi Sato; Masahiro Kagotani; Yoshie Souma

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 143 KB
• Volume: 151
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(99)00254-x

✦ Synopsis

A new type of heterogeneous catalyst, 'bipyridine containing aromatic polyamide' poly N, N -bisphenylene-2,2 -bipyri-X .

Ž . dine-4,4 -dicarboxylic amide, Bpya -CuCl , for dimethyl carbonate DMC synthesis by oxidative carbonylation of 2 Ž methanol in the liquid-phase reaction was investigated. This catalyst showed good performance high DMC yield and DMC . Ž . Ž . selectivity , as in the case of poly vinylpyridine PVP -CuCl . Bpya shows higher heat resistance than PVP, and thus 2 Bpya-CuCl is considered to be more stable than PVP-CuCl under the reaction condition. Bpya-CuCl could be easily 2 2 2 recycled after filtration, and actually similar activity was found after three repetitions. During the reaction, 20 ; 30% of total CuCl was eliminated from the immobilized catalyst. Although the elimination of CuCl occurred considerably in the initial 2 2 step, it became slight during the reaction. The characteristics of corrosion resistance of Bpya-CuCl was studied, and it 2 became obvious that corrosion is closely related to the trend of CuCl elimination. From these results, we proposed two 2 types of reaction mechanism for the reaction system.