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Ethene oligomerization continuous reaction method

An ethylene oligomerization and reaction technology, applied in chemical instruments and methods, hydrocarbons, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of poor repeatability caused by oligomerization reaction process and harsh ethylene process conditions , harsh process requirements, etc., to achieve high selectivity, good oligomerization activity, and good repeatability.

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, no matter whether methylalumoxane or modified methylalumoxane is used as a cocatalyst, the cost is too high and the dosage is too large. When it is used as a cocatalyst in large-scale ethylene oligomerization, it will inevitably lead to production costs. high
[0004] At present, it is generally believed that water is very unfavorable to the ethylene oligomerization reaction 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 is harmful to the process. The requirements are very demanding, resulting in very poor reaction initiation and repeatability of the oligomerization process
[0005] In addition, the water content of polymer grade ethylene is required to be below 5ppm, which makes the process conditions for producing ethylene more stringent

Method used

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  • Ethene oligomerization continuous reaction method
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  • Ethene oligomerization continuous reaction method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Synthesis of main catalyst chlorinated 2,6-diacetylpyridine bis(2-methylaniline)iron(II):

[0030] The 2,6-diacetylpyridine chloride bis(2-methylaniline)amine iron(II) complex can be prepared by the preparation method reported in Chinese patent application CN101580488B.

[0031] 2. The continuous reaction of ethylene oligomerization specifically comprises the following steps: (1) in a 100ml continuous reaction device, aqueous ethylene, solvent toluene, main catalyst solution (concentration is 2.5 μ mol / ml, solvent is toluene) and cocatalyst solution (concentration is 715 μ mol / ml, and solvent is toluene) enters reactor respectively, and flow rate is respectively 80g / h, 168.26g / h, 3.40g / h and 2.34g / h, and Al / Fe is 196.8 in the reaction system, keeps the reaction mass in The residence time in the reactor is 30min; (2) reaction pressure is 1MPa and reaction temperature is 30 ℃, wherein, take ethylene as calculation basis, the mass content of water is 15ppm; (3) carry ou...

Embodiment 2

[0033] Same as Example 1, the difference is that the mass content of water is 60ppm. See Table 1 for the data.

Embodiment 3

[0035] Same as Example 1, the difference is that the mass content of water is 150ppm. See Table 1 for the data.

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Abstract

The invention discloses an ethene oligomerization continuous reaction method. The method comprises that a main catalyst 2, 6-diacetylpyridine(anil)FeCl2 shown in the formula (I), an aluminum-containing cocatalyst and an organic solvent are added into aqueous ethene as a raw material. The catalyst is used for an ethene oligomerization reaction process, has very high oligomerization reaction activity and high alpha-ethene selectivity, realizes fast oligomerization reaction initiation, stable reaction process and good repeatability and still has very good oligomerization reaction activity at a low aluminum / iron ratio. The ethene oligomerization continuous reaction method overcomes technology biases of the technicist in the field, produces unforeseeable technical effects, realizes good balance of catalysis effects and a cost, greatly reduces an ethene oligomerization reaction cost and has good practicality and a wide industrial application prospect.

Description

technical field [0001] The invention relates to the field of ethylene oligomerization, in particular to a continuous reaction method for ethylene oligomerization. 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. [0003] The catalysts used in ethylene oligomerization mainly include nickel-based, chromium-based, zirconium-based and aluminum-based catalysts. In recent years, Brookhart group (Brookhart, M et al., J.Am.Chem.Soc., 1998,120,7143-7144; WO99 / 02472,1999), Gibson group (Gibson, V.C. et al., Chem.Commun., 1998,849-850; Chem.Eur.J.,2000,2221-2231) found that some tridentate pyridine imine complexes of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/02C07C2/22B01J31/22
CPCY02P20/52
Inventor 郑明芳刘珺张海英栗同林李维真王怀杰吴红飞祁彦平
Owner CHINA PETROLEUM & CHEM CORP
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