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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。H_2O/Et_3Al_2Cl_3/PPh_3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—1300molC_3~-/molPr·h和二聚转化率50—60％。在RE(ac-ac)_3/Et_3Al_2Cl_3/PPh_3和Pr(β-二酮)_3/Et_3Al_2Cl_3/PPh_3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。
In this paper, an exploratory study on the catalytic propylene dimerization system based on the light rare earth metal β-diketone complex has been carried out. Find Pr (acac) _3. H_2O / Et_3Al_2Cl_3 / PPh_3 system has high dimerization activity of 1200-1300molC_3 ~ / molPr · h and dimerization conversion in the range of Al / Pr of 30-50, P / Pr of 3-6 and temperature of 60-80 ℃ Rate of 50-60%. In RE (ac-ac) _3 / Et_3Al_2Cl_3 / PPh_3 and Pr (β-diketone) _3 / Et_3Al_2Cl_3 / PPh_3 systems, the order of activity was Ce ~ Pr> La> Nd> Sm and hexafluoroacetylacetone> acetylacetone> The composition of the dimer is as follows: 64-66% of methylpentene and 24.1-26.4% of linear olefin. The dimerization selectivity is between 77-93.3%.