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Method for preparing octylene-1 by ethylene tetramerization reaction

A technology for tetramerization and reaction of ethylene, applied in chemical instruments and methods, hydrocarbons, organic compounds/hydrides/coordination complex catalysts, etc. low sex issues

Inactive Publication Date: 2013-04-17
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The ethylene tetramerization catalysts and methods disclosed in the scientific and patent literature so far usually have one or more of the following defects: ① low selectivity of the product hexene-1 or octene-1; ② low purity of the product, some long-chain High carbon number products; ③The formation of polymers, which leads to blockage of the reactor and difficulty in continuous long-term operation; ④Poor catalyst activity and high cost of co-catalysts; ⑤The reaction conditions are harsh and require high pressure, resulting in high investment, maintenance and energy costs; ⑥ Sensitive to changes in cocatalyst quality

Method used

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  • Method for preparing octylene-1 by ethylene tetramerization reaction
  • Method for preparing octylene-1 by ethylene tetramerization reaction
  • Method for preparing octylene-1 by ethylene tetramerization reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Preparation of (diphenyl) phosphorus nitrogen (isopropyl) phosphorus (diphenyl) ligand (C 27 h 27 NP 2 )

[0040] (1) Preparation of N, N-diisopropyl dichlorophosphoramide

[0041] in the N 2 Add dehydrated toluene (100mL) into a fully replaced stirred 250mL reactor, add PCl 3 (21.87mL, 0.25mol), and cooled to -20°C. Diisopropylamine (70 mL, 0.5 mol) was slowly added while stirring at room temperature, stirred for 3 hours, raised to room temperature and continued to react for 2 hours, then filtered and dried to obtain 38.1 g (0.19 mol, 74%) of the product.

[0042] (2) Preparation of phenylmagnesium bromide lattice reagent

[0043] in the N 2 Add dehydrated THF (100 mL) and magnesium powder (9.11 g, 0.375 mol) into a fully replaced stirred 250 mL reactor, cool down in an ice bath and slowly add bromobenzene (11.775 g, 0.075 mol) dropwise. After 2 hours, heat to reflux and continue the reaction for 2 hours to obtain the lattice reagent.

[0044] (3) Preparati...

Embodiment 2

[0055] 1. Preparation of (diphenyl) phosphorus nitrogen (isopropyl) phosphorus (diphenyl) ligand (C 27 h 27 NP 2 ) with embodiment 1.

[0056] 2. Preparation of modified active agent

[0057] At -78°C, under vigorous stirring, slowly add 0.81 mL of twice distilled water (45 mmol) dropwise into 6.84 mL (50 mmol) of AlEt 3 In toluene (50mL) solution, after the dropwise addition, the system was naturally returned to room temperature, and the reaction was continued for 12h to obtain a toluene solution of EAO. [Ph 3 C][Al(OC(CF 3 ) 3 ) 4 ] (10mmol) of toluene solution 50mL, kept at room temperature for 6 hours after the dropwise addition, to obtain a modified activator.

[0058] 3. Preparation of catalyst

[0059] With embodiment 1. The modified activator added is the modified activator prepared in this example.

[0060] 4. Ethylene oligomerization

[0061] With embodiment 1. Obtain 6.38g of oligomerization product, catalyst activity is 3.87×10 5 g oligomer / mol Cr.h. ...

Embodiment 3

[0063] 1. Preparation of (diphenyl) phosphorus nitrogen (isopropyl) phosphorus (diphenyl) ligand (C 27 h 27 NP 2 ) with embodiment 1.

[0064] 2. Preparation of modified active agent

[0065] With embodiment 1. The difference is that the added modifier containing at least two heteroatoms is sodium tetrafluoroborate compound.

[0066] 3. Preparation of catalyst

[0067] With embodiment 1.

[0068] 4. Ethylene oligomerization

[0069] With embodiment 1. Obtain 8.5g of oligomerization product, catalyst activity is 5.15×10 5 g oligomer / molCr.h. The distribution of the oligomerization products is shown in Table 1.

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Abstract

The invention relates to a method for preparing octylene-1 by ethylene tetramerization reaction. The catalyst is composed of components (a), (b), (c) and / or (d) in a mol ratio of 1:(0.5-100):(0.1-5000):(0-500), wherein the component (a) is 1,2-bis(N(P(phenyl2)2)-benzene, 1,4-bis(N(P(phenyl)2)2)-benzene or N(CH2CH2N(P(phenyl)2)2)3; the component (b) is CrCl3(THF)3, chromium isooctoate or chromium acetylacetone; the component (c) is the product of reacting an alkyl aluminum compound or aluminoxane compound with a modifier containing at least two heteroatoms; and the component (d) is ortho-trichloromethylfluorobenzene, ortho-trifluoromethylchlorobenzene, ortho-trichloromethylchlorobenzene, ortho-trifluoromethylchlorobenzene, or 2 or 6-dichloro-trichloromethylbenzene. The mass percentage of the C8 linear alpha-olefin in the product is greater than 60%.

Description

technical field [0001] The invention relates to a method for preparing octene-1 by ethylene tetramerization. Background technique [0002] Higher linear α-olefins such as decene-1, octene-1 and hexene-1 are obtained by oligomerization of ethylene. However, in the conventional ethylene oligomerization technology, the product generally contains a variety of higher α-olefins, which conform to the Schulz-Flory distribution or Poisson distribution. For example, U.S. Patent No. 6,184,428 discloses a nickel-based catalyst comprising 2-diphenylphosphoric acid as a chelating ligand, NiCl as a nickel precursor 2 ·6H 2 O, and sodium tetraphenylborate as a catalytic activator. This patent document also discloses that in the ethylene oligomerization reaction using the nickel-based catalyst, the selectivity of octene-1 is 19%. The SHOP process (US 3676523, US 3635937) uses a similar catalytic system, and the content of octene-1 in the oligomerization product accounts for 11%. In othe...

Claims

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Application Information

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IPC IPC(8): C07C11/107C07C2/32B01J31/26
Inventor 于部伟李建忠张宝军姜涛徐可忠王斯晗王桂芝杨玉和于杨张君曹晨刚陈谦李健张德顺邵怀启王力搏高宇新刘延军王亚丽魏小强高飞韩雪梅衣学飞柏晓红肖海成窦传宇崔凯跃白玉杰王淑兰
Owner PETROCHINA CO LTD
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