【摘要】 研究了在均相催化丙烯二聚合成四甲基乙烯 (DMB - 2 )反应中 ,Ziegler型均相催化剂的组成对反应活性与选择性的影响。实验确定了均相催化剂组成为氯化镍、三乙基铝、三异丙基膦、五氯苯酚和异戊二烯 (isoprene) ,并在氯苯为溶剂 4～ 6℃反应温度和干燥N2 气氛下 ,制得该均相催化剂。当它的配比为n(NiCl2 )∶n(AlEt3 )∶n[P(i Pr) 3 ]∶n(C6Cl5OH)∶n(isoprene) =1∶30∶2∶72∶16 0时 ,制得的催化剂用于均相催化丙烯二聚合成四甲基乙烯有较好的反应活性与选择性 ,丙烯转化率为 5 5 %～ 5 7% ,四甲基乙烯选择性为 44 %～ 46 %。更多还原

【Abstract】 A new ziegler type catalyst was developed for the dimerization of propylene to 2,3 dimethyl 2 butene(DMB-2),which consists of NiCl 2,AlEt 3,P(i Pr) 3,C 6Cl 5OH and isoprene.The catalyst was prepared in dry N 2 and C 6H 5Cl solvent at 4-6 ℃.Composition of the catalyst was studied with respect to the activity and selectivity for dimerization of propylene to DMB-2.When n(NiCl 2)∶n(AlEt 3)∶n[P(i Pr)3]∶n(C 6Cl 5OH)∶n(isoprene)=1∶30∶2∶72∶160,the catalyst had high catalytic activity and selectivity.Conversion of propylene was 55%-57% and selectivity for DMB-2 was 44%-46%.更多还原