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Catalyst composition and oligomerization method for ethylene oligomerization

A technology of ethylene oligomerization and composition, which is applied in the direction of catalysts, hydrocarbons, hydrocarbons, etc., can solve the problems of harsh process requirements and poor repeatability of oligomerization process, and achieve good repeatability, high selectivity, and operation smooth effect

Active Publication Date: 2019-12-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, it is generally believed that water and oxygen are very unfavorable to the ethylene oligomerization process. CN200810111717.8 discloses a method for ethylene oligomerization, which is strictly controlled in an anhydrous and oxygen-free environment. Therefore, the current ethylene oligomerization reaction The process requirements are very harsh, resulting in very poor reaction initiation and repeatability of the oligomerization process

Method used

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  • Catalyst composition and oligomerization method for ethylene oligomerization
  • Catalyst composition and oligomerization method for ethylene oligomerization
  • Catalyst composition and oligomerization method for ethylene oligomerization

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Embodiment 1

[0021]The ethylene oligomerization reaction specifically includes the following steps: (1) Replace the reaction system by high temperature drying, vacuum replacement and other operations to ensure that there is no water and oxygen in the reaction system; (2) Use ethylene to replace the reaction system to make the reaction system The system is in an ethylene environment; (3) Add tert-butyl hydroperoxide and toluene solvent to the reaction kettle, add 1.37ml triethylaluminum toluene solution (concentration is 715μmol / ml), add 2ml chloride-2-formyl- 5,6-Dimethyl-1,10-phenanthroline-2,6-diethylaniline iron (II) complex (R 3 and R 4 is methyl, R 1 , R 2 , R 5 and R 6 After the toluene solution (concentration is 2.5 μ mol / mL) that is all hydrogen), make the total amount of composition be 100mL, wherein, take the weight of organic solvent (toluene) as calculation basis, the weight content of tert-butyl hydroperoxide is 25ppm , Al / Fe=196, after fully stirring, feed ethylene to st...

Embodiment 2

[0023] With embodiment 1, difference is that the weight content of tert-butyl hydroperoxide is 100ppm. See Table 1 for the data.

Embodiment 3

[0025] With embodiment 1, difference is that the weight content of tert-butyl hydroperoxide is 250ppm. See Table 1 for the data.

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Abstract

The invention discloses a catalyst composition for an ethylene oligomerization reaction process and application of the catalyst composition. The catalyst composition comprises a main catalyst shown in formula I, namely a chloride substituted-2-formyl-1,10-phenanthroline condensed-2,6-diethyl phenylamine ferrite (II) complex, an aluminum-containing promoter and tert-butyl hydroperoxide. The catalyst composition disclosed by the invention is applied to the ethylene oligomerization reaction process, is very high in oligomerization reaction activity, high in alpha-olefin selectivity, is rapid in oligomerization reaction initialization speed, stable in operation and good in repeatability, and is still very good in oligomerization reaction activity even in a low aluminum / chromium ratio, so that technical prejudice of operators of the field is overcome, unforeseeable technical effects are achieved, catalysis effects and cost are relatively well balanced, the ethylene oligomerization reaction cost is greatly reduced, and the catalyst composition is good in practicability and wide in industrialization prospect.

Description

technical field [0001] The invention relates to the field of ethylene oligomerization, in particular to a catalyst composition used in an ethylene oligomerization process. Background technique [0002] Linear α-olefins are widely used in the fields of ethylene comonomers, surfactant synthesis intermediates, plasticizer alcohols, synthetic lubricating oils and oil additives. In recent years, with the continuous development of the polyolefin industry, the worldwide demand for α-olefins has grown rapidly. At present, the vast majority of α-olefins are prepared by ethylene oligomerization. The catalysts used in ethylene oligomerization mainly contain nickel series, chromium series, zirconium series and aluminum series etc. WO99 / 02472,1999), Gibson group (Gibson, V.C.et al, Chem.Commun., 1998,849-850; Chem.Eur.J., 2000,2221-2231) found some Fe(II) and Co( The tridentate pyridine imine complex of II) can catalyze the oligomerization of ethylene, and not only the catalytic activ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C07C2/32C07C11/08C07C11/02
CPCB01J31/183B01J2231/20B01J2531/0213B01J2531/842C07C2/32C07C2531/22C07C11/08C07C11/02Y02P20/52
Inventor 刘珺吴红飞郑明芳张海英王怀杰
Owner CHINA PETROLEUM & CHEM CORP
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