Continuous synthesis of isobutylaluminoxanes in a compact and integrated approach
Continuous synthesis of isobutylaluminoxanes in a compact and integrated approach
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以紧凑、集成的方法连续合成异丁基铝氧烷
DOI:
10.1016/j.cej.2021.131750
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发表时间:
2021-08
影响因子:
15.1
通讯作者:
Yongrong Yang
中科院分区:
文献类型:
--
作者:
Yirong Feng;Mengbo Zhang;Haomiao Zhang;Jingdai Wang;Yongrong Yang
We present a 3D-printed continuous flow platform for controllable synthesis of isobutylaluminoxanes (IBAO), an effective olefin polymerization co-catalyst, via the highly exothermic hydrolytic reaction of triisobutylaluminum (TIBA). This platform encompasses modules of mixing and reaction, in-line separation, andin situUV–vis characterization. In addition, two NMR protocols are established to validate the results of in-line UV–vis analysis (by31P NMR) and reveal product structures (by1H NMR). Measured temperature profiles over the reactor indicate essentially fast heat removal, ensuring inherent safety. Co-catalytic activities of IBAO are obtained from ethylene oligomerization experiments using an iron-based catalyst system at atmospheric pressure. Furthermore, we investigate the influence of key operating parameters including temperature, initial molar ratio between water and TIBA, initial TIBA concentration, and residence time. A high IBAO yield over 98% and a superior co-catalytic activity of ~ 5000 kg·(mol Fe)–1·h−1are achieved with optimal parameters in this single-pass platform, demonstrating the advantages of process.
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影响因子:
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