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ABSTRACT ¸ñʽ£º±êÌâ1 ×ÖÌ壺ºÚÌå¡¢¼Ó´Ö¡¢¾ÓÖÐ ×ֺţºËĺŠDiethyl carbonate (DMC) is an environmentally benign intermediation. It was paid widely attention that the research and development of a green process of synthesis of DMC. Although Ó¢ÎÄÕªÒªÄÚÈÝΪTimes New Roman ×ÖÌ壬СËÄthe process of producing DMC by oxidative carbonization of methanol in the presence of CuCl ºÅ£¬Ê×ÐÐËõ½øÁ½¸ö×Ö catalyst system has been industrial, some drawbacks, for instance the production of the by-production HCl , in which not only caused to a leaking of Cl- subsequence by the deactivate of the catalyst, but also a corrosion to the reactor, still need to be overcome.
In this work, a complex catalyst was prepared from CuCl and Schiff base additives and characterized by IR. The effects of different Schiff base additives were investigated. The results showed that high activity was exhibited in the presence of complex catalyst synthesized by N-methylimidazole and CuCl£¬the methanol conversion was 5. 8%, DMC selectivity reached to 99.9 % at 120 ¡æ, pressure 2.4 MPa, the reaction time 4 h. At the same condition, catalytic activity was further improved by two-ligands complex CuCl system, methanol conversion is 6.56% (PVP: N-methylimidazole: CuCl = 2:1:1).The result also showed that life of the CuCl/Schiff base additive catalysts was prolonged.
Keywords£º oxidative carbonization of methanol£»DMC£»Cuprous chloride complex catalys
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