876127-06-9Relevant articles and documents
N ortho acyl substituted nitrogen-containing heterocyclic compound and process for preparing aminal iron (II) complexes thereof
-
Page/Page column 28-29, (2016/04/20)
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 RnAIXm, or a substituted or unsubstituted benzyl lithium Ph′CH2Li, 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.
One method of oligomerization of ethylene
-
Paragraph 0051-0054, (2017/03/08)
The invention discloses an ethylene oligomerization method. The oligomerization reaction of ethylene is realized in a reaction system comprising a 2-formyl-1,10-phenanthroline dichloroaniline iron (II) chloride complex main catalyst, an aluminiferous promoter, water and an organic solvent, wherein the organic solvent is alpha-olefin of Cn (n is less than or equal to 10 and n is more than 4). In the formula (I), R1, R2, R3, R4, R5 or R6 is independently selected form hydrogen, C1-C6 alkyl, halogen, C1-C6 alkoxy and nitryl. The method overcomes technical defects, optimizes an oligomerization reaction process, is high in oligomerization activity, enables the ethylene oligomerization reaction process to be fast in initiation, stable in operation, low-toxicity and environment-friendly, is good in catalysis effect, well balances the cost, and is strong in practicability; the cost of the ethylene oligomerization reaction is greatly reduced, the catalysis effect and the production cost are comprehensively taken into consideration, and the industrialized prospect is wide.
Iron complexes bearing 2-imino-1,10-phenanthrolinyl ligands as highly active catalysts for ethylene oligomerization
Sun, Wen-Hua,Jie, Suyun,Zhang, Shu,Zhang, Wen,Song, Yingxia,Ma, Hongwei,Chen, Jiutong,Wedeking, Katrin,Froehlich, Roland
, p. 666 - 677 (2008/10/09)
A series of iron complexes ligated by 2-imino-1,10-phenanthrolinyl ligands, LFeCl2 (L = 2-(ArN=CR)-1,10-phen), were synthesized and sufficiently characterized by elemental and spectroscopic analysis along with X-ray diffraction analysis. Activated with methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), these iron(II) complexes show high catalytic activities up to 8.95 × 107 g mol-1(Fe) h -1 for ethylene oligomerization. The distribution of oligomers produced follows Schluz-Flory rules with high selectivity for α-olefins. Both the steric and electronic effects of coordinative ligands affect the catalytic activity and the properties of the catalytic products. The parameters of the reaction conditions were also investigated to explore the catalytic potentials of these complexes.