2-Ethyl-ketimino-1,10-phenanthroline iron(II) complexes as highly active catalysts for ethylene oligomerization☆
作者:Min Zhang、Wenjuan Zhang、Tianpengfei Xiao、Jun-Feng Xiang、Xiang Hao、Wen-Hua Sun
DOI:10.1016/j.molcata.2010.01.009
日期:2010.4.1
X-ray diffraction. All iron complexes, activated with methylaluminoxane (MAO), exhibit high activities in ethyleneoligomerization with high selectivity for α-olefins produced. Compared with other 2-imino-phenanthrolines, the title complexes show better thermal stability, and their oligomerization products are potentially more useful due to lower contents of butenes and waxes observed.
N ORTHO ACYL SUBSTITUTED NITROGEN-CONTAINING HETEROCYCLIC COMPOUND AND PROCESS FOR PREPARING AMINAL IRON (II) COMPLEXES THEREOF
申请人:Liu Jun
公开号:US20130267708A1
公开(公告)日:2013-10-10
Provided are a process for preparing an N ortho acyl substituted nitrogen-containing heterocyclic compound and an aminal iron (II) complex thereof, and the use of the complexes obtained by the process in an olefin oligomerization catalyst. The N ortho acyl substituted nitrogen-containing heterocyclic compound in the present invention is for example 2-acyl-1,10-phenanthroline or 2,6-diacetyl pyridine as shown in formula b, and the N ortho acyl substituted nitrogen-containing heterocyclic compound in the present invention is produced by a reaction of a precursor thereof in a substituted or unsubstituted nitrobenzene. Preferably the precursor shown in formula I in the present invention is produced by 1,10-phenanthroline reacting with trialkyl aluminum, or a halogenoalkyl aluminum R
n
AlX
m
, or a substituted or unsubstituted benzyl lithium
2
Li, followed by hydrolysis. The preparation method provided in the present invention has a few synthetic steps, an easy process, a low toxic effect, and reduces the preparation costs of the catalyst, and has a promising outlook in the industrial application.
CATALYST COMPOSITION AND PROCESS FOR ETHYLENE OLIGOMERIZATION
申请人:China Petroleum & Chemical Corporation
公开号:US20140316087A1
公开(公告)日:2014-10-23
The present disclosure provides a catalyst composition for ethylene oligomerization including an imino ferrous complex shown in Formula (I) as the main catalyst, an aluminum-containing cocatalyst, water, and an organic solvent:
According to the present disclosure, a higher oligomerization activity can be obtained with the catalyst composition than with a catalyst composition system in the prior art which contains no water. Moreover, when the catalyst composition according to the present disclosure is used, a high selectivity of α-olefins is obtainable. Besides, the catalyst composition according to the present disclosure can enable rapid initiation, stable operation, and good repeatability of the oligomerization reaction. According to the present disclosure, a high oligomerization activity can be obtained even at a rather low ratio of Al/Fe, or at a low reaction temperature.