中华医学超声杂志

应用化学 ›› 1987, Vol. 0 ›› Issue (2): 17-21.

• 研究论文 • 上一篇    下一篇

轻稀土金属β-二酮络合物催化丙烯二聚的研究

周科衍, 吴棱   

  1. 大连工学院化工学院应用有机教研室
  • 收稿日期:1986-01-16 修回日期:1986-05-20 出版日期:1987-04-10 发布日期:1987-04-10
  • 基金资助:
    中国科学院科学基金

STUDY OF THE PROPYLENE DIMERIZATION CATALYZED BY β-DIKETONATE COMPLEXES OF LIGHT RARE-EARTH METALS

Zhou Keyan, Wu Leng   

  1. The Teaching and Research Section of Applied Organic Chemistry, DIT
  • Received:1986-01-16 Revised:1986-05-20 Published:1987-04-10 Online:1987-04-10

PDF

299

被引次数

13

摘要： 本文对以轻稀土金属β-二酮络合物为基础的催化丙烯二聚体系进行了探索性研究。找出了Pr(acac)3。H2O/Et3Al2Cl3/PPh3体系,在Al/Pr为30—50、P/Pr为3—6、温度为60—80℃范围内有较高二聚活性1200—1300molC3-/mol Pr·h和二聚转化率50—60%。在RE(ac-ac)3/Et3Al2Cl3/PPh3和Pr(β-二酮)3/Et3Al2Cl3/PPh3体系中,活性顺序分别为Ce～Pr>La>Nd>Sm和六氟乙酰丙酮>乙酰丙酮>二苯二甲酰甲烷,其二聚物的组成分布为:甲基戊烯64～66%,线性烯烃24.1—26.4%。二聚选择性在77—93.3%之间。

Abstract: In this paper the study of propylene dimerization catalyzed by β-diketonat∂ complexes of light rare-earth metals is presented catalyst Pr (acac)3·H2O/Et3Al2 Cl3/PPh3 showed higher activity of 1200-1300 molC3-/molPr.h and conversion rate of 50-60% in dimerization under the reaction conditions Pr(acac)3·H2O, 0.05-0.3mmol; Al/Pr ratio, 30-50;P/Pr ratio, 3-6 and temperature 60-80℃. For systems RE(acac)3 /Et3Al2Cl3/PPh3 and Pr(β-diketonates)3·χH2O/Et3 Al2Cl3/PPh3,the catalyst activity decreased in the following order: for rare earths: Ce～Pr>La>Nd>Sm for ligands: hfacac>acac>DBM. All catalyst systems studied gave a close weight percentage of products: methylpentenes of 64-66% and linear hexenes of 24.1-26.4 with dimer selectivity of 77-93.3%.

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