Ethylene oligomerization using hyperbranch-macromolecule-bridged salicylaldimine cobalt catalysts

ZHANG Na; WANG Sihan; WANG Jiaming; LI Cuiqin; WANG Jun

doi:10.11949/j.issn.0438-1157.20161076

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Ethylene oligomerization using hyperbranch-macromolecule-bridged salicylaldimine cobalt catalysts

更新时间：2025-12-10

- Ethylene oligomerization using hyperbranch-macromolecule-bridged salicylaldimine cobalt catalysts
- CIESC Journal Issue 3, Pages: 903-909(2017)
- 作者机构：
  
  1. 东北石油大学化学化工学院, 石油与天然气化工省重点实验室,黑龙江,大庆,163318
  2. 中国石油化工研究院大庆化工中心,黑龙江,大庆,163312
  3. 齐齐哈尔大学材料科学与工程学院,黑龙江,齐齐哈尔,161006
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161076
  CLC： 631
- Online First：05 March 2017，
  
  Published：05 March 2017
- 稿件说明：
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ZHANG Na, WANG Sihan, WANG Jiaming, et al. Ethylene oligomerization using hyperbranch-macromolecule-bridged salicylaldimine cobalt catalysts[J]. CIESC Journal, 2017, (3): 903-909.
DOI：

ZHANG Na, WANG Sihan, WANG Jiaming, et al. Ethylene oligomerization using hyperbranch-macromolecule-bridged salicylaldimine cobalt catalysts[J]. CIESC Journal, 2017, (3): 903-909. DOI： 10.11949/j.issn.0438-1157.20161076.

摘要

以1.0代（1.0G）超支化大分子、水杨醛和CoCl2·6H2O为原料，依次经过希夫碱反应和络合反应合成了3种具有不同烷基链长度的新型超支化大分子桥联水杨醛亚胺钴催化剂。对目标产物的结构进行FT-IR、UV、MS及TG表征，考察了溶剂种类、助催化剂种类、反应温度、反应压力、Al/Co摩尔比等条件对超支化大分子桥联水杨醛亚胺钴催化剂催化乙烯低聚性能的影响。结果表明，超支化大分子桥联水杨醛亚胺钴催化剂催化乙烯低聚表现出良好的催化活性和高碳烯烃（C10+）的选择性。催化活性随反应温度和Al/Co摩尔比增加先增加后下降，随反应压力增加而增加。以甲苯为溶剂，在一氯二乙基铝（DEAC）活化下，当反应温度为25℃、反应压力为0.5 MPa、Al/Co摩尔比为500时，催化活性可达1.87×105 g·（mol Co）-1·h-1，聚合产物中高碳烯烃的含量高达42.90%。

Abstract

Three novel hyperbranch-macromolecule-bridged salicylaldimine cobalt catalysts were synthesized by Schiff and complex reactions of 1.0G hyperbranched macromolecules

salicylaldehyde

and cobalt chloride hexahydrate

and were characterized by FT-IR

MS and TG. The influences of solvent

co-catalyst

reaction temperature

reaction pressure

and Al/Co molar ratio on their catalytic performances in ethylene oligomerization were studied. The results showed that the hyperbranch-macromolecule-bridged salicylaldimine cobalt catalysts had excellent catalytic activities and selectivity for ethylene oligomerization of high carbon number olefins (C10+). The catalytic activity first increased and then decreased with the increase of reaction temperature and Al/Co molar ratio

however

it continuously increased with the increase of reaction pressure. The highest activity of 1.87×105 g·(mol Co)-1·h-1 and 42.90% selectivity for high carbon number olefins were achieved under the condition of toluene as solvent

DEAC as co-catalyst

reaction temperature at 25℃

reaction pressure at 0.5 MPa

and Al/Co molar ratio at 500.

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