【摘要】：以直鏈?zhǔn)陌窞楹说牡痛?掃帚型"大分子、水楊醛和Ni Cl2為原料,依次通過希夫堿反應(yīng)和絡(luò)合反應(yīng)合成了一種新型的"掃帚型"水楊醛亞胺鎳催化劑,采用傅里葉變換紅外光譜、核磁共振氫譜和紫外-可見分光光度計證實其合成產(chǎn)品的結(jié)構(gòu)與理論結(jié)構(gòu)相符。在甲基鋁氧烷(MAO)活化下,該催化劑具有良好催化乙烯齊聚的性能,且隨著反應(yīng)壓力的升高和Al/Ni(摩爾比)增加,其催化活性增大;在反應(yīng)溫度為25℃,反應(yīng)壓力為0.5 MPa,Al/Ni摩爾比為1500時,該催化劑的活性可達2.33×106g/(mol Ni·h),聚合產(chǎn)物主要是C8以下的低碳烯烴,含量高達94%以上。相同條件下,其催化乙烯齊聚的活性高于與其具有類似結(jié)構(gòu)的超支化鎳系催化劑。
[Abstract]:A new "broom type" salicylidene imine nickel catalyst was synthesized by Schiff base reaction and complexation reaction with low-generation "broom-type" macromolecules with straight chain tetradecylamine as nucleus, salicylaldehyde and Ni Cl2 as raw materials. Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) and UV-Vis spectrophotometer were used to confirm the structure of the synthesized product was consistent with the theoretical structure. The catalyst has good catalytic activity for ethylene oligomerization under the activation of methylaluminoxane (MAO), and its catalytic activity increases with the increase of reaction pressure and Al/Ni (molar ratio), and the reaction temperature is 25 鈩，

本文編號：2261036