摘要
从催化剂各组分的电导率、催化剂陈化方式和各组分不同配比对聚合活性的影响3个方面研究了在25℃加氢汽油介质中,钕系稀土催化体系Nd(i-octa)_3-Al(i-Bu)_3-CCl_4用于聚合异戊二烯的活性。结果表明,催化剂三组分间的反应是CCl_4与Al(i-Bu)_3先作用生成氯化异丁基铝再向钕盐提供卤素形成活性中心,活性中心具有双金属络合物结构。催化剂在(Cl+Al)+Nd陈化方式下活性最高,各组分最佳配比为Nd/Al/Cl=1/50/3。
With hydrogenated gasoline as solvent at ambient temperature, the activity of neodymium system rare earth catalyst Nd（i-octa）3-Al（i-Bu）3-CCl4 in isoprene polymerization was studied in this paper from three aspects of conductivity, aging methods and molar ratios of the different components. The results showing that mechanism of the catalyst system was that CCl4 and Al（i-Bu） 3 reacted firstly, then provided Cl to neodymium salt to form active site which perhaps had bi-metal complex structure. Best activity of the catalyst system could be acquired on conditions that the aging method was （ Cl ＋ Al） ＋ Nd and the best molar ratio was Nd/Al/Cl = 1/50/3.
出处
《合成技术及应用》
2010年第1期23-27,共5页
Synthetic Technology & Application
关键词
钕
稀土催化剂
电导率
异戊二烯
neodymium
rare earth catalyst
conductivity
isoprene
