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Chem. J. Chinese Universities ›› 1997, Vol. 18 ›› Issue (6): 951.

• Articles • Previous Articles     Next Articles

Synergic Effect of Multimetallic Catalysts in the Cyclotrimerization of Butadiene

SUN Qi2, LIAO Shi-Jian1, XU Yun1, YU Dao-Rong1, CHEN Shou-Shan3   

  1. 1. Dalian Institute of Chemical Physics, State Key Laboratory of Catalysist, Chinese Academy of Sciences, Dalian, 116023;
    2. Department of Chemistry, Liaoning Normal University, Dalian, 116029;
    3. Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071
  • Received:1996-06-24 Online:1997-06-24 Published:1997-06-24

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Abstract: The synergic effect of multimeta1lic catalysts by the addition of the second transi-tion metal compound to the TiCl4/AlEt1.46Cl1.54 system has been investigated in the cy-clotrimerization of butadiene. The experimental results indicate that with the addition of a very small amount of the second metal compound, Cr(acac)3, Mn(acac)3, NiCl2, ZrCl4 etc.to the Ti-Al system, the selectivity of cyclotrimerization of butadiene was improved(except Ni (OAc)2), the maximum turnover frequency (TOFmax.) and turnover (TO ) were changed.The second metal compound should be added to Ti-Al system before Ti active species formed, otherwise no synergic effect will be observed- The second metal compound/AlEt1.46Cl1.54 systems alone can catalyze the dimerization(Cr, Mn, Fe, Zr sa1ts) or polymerization (Ni, Co salts) of butadiene.

Key words: Multimetallic catalyst of Ti system, Synergic effect, Cyclotrimerization, trans,trans,cis-,5,9-Cyclododecatriene

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