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Catalytic process for the oligomerization of olefinic monomers

A technology of olefin monomer and catalyst, applied in the field of olefin monomer oligomerization

Inactive Publication Date: 2009-01-21
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Although the tetramerization catalysts disclosed in the aforementioned Sasol literature have 8 Excellent selectivity to 1-octene within the fraction, but a relatively high degree of by-product formation was observed

Method used

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  • Catalytic process for the oligomerization of olefinic monomers
  • Catalytic process for the oligomerization of olefinic monomers

Examples

Experimental program
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Embodiment 1-11

[0167] Catalyst system preparation for simultaneous trimerization and tetramerization in a batch autoclave

[0168] CrCl in a Braun MB 200-G drying oven 3 The 1:1 complexes with Ligand A or B (ie composition A' or B' indicated in Table 1) were placed in glass vials. The catalyst precursor composition was converted to a catalyst solution by adding a 3 or 1.5 mmol solution of MAO in toluene (approximately 1.6 g or 0.8 g MAO solution), followed by typically 4 g of anhydrous toluene. Finally the bottle is sealed with a septum cap.

[0169] These catalyst solutions or part of these solutions are used for the simultaneous trimerization and tetramerization of ethylene.

[0170] Alternatively, tris(acetylacetonate)chromium (typically 30 μmol) and the amount of ligand component C or D as shown in Table 1 were placed in a glass bottle, anhydrous toluene (typically 4 g) was added thereto, to obtain a catalyst precursor solution. Finally the bottle is sealed with a septum cap.

[0...

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Abstract

A process for the simultaneous trimerization and tetramerization of olefinic monomers , wherein the process comprises contacting at least one olefinic monomer with catalyst system comprising : a) a source of chromium, molybdenum or tungsten; b) a ligand having the general formula (I) ; (R<1>)2P-X-P (R<1>)m(R<2>)n wherein : X is a bridging group of the formula -N(R<3>)-, wherein R<3> is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof; the R<1> groups are independently selected from an optionally substituted aromatic group bearing a polar substituent on at least one of the ortho-positions; and the R<2> groups are independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups and c) a cocatalyst. The present invention further relates to a process for the simultaneous trimerization and tetramerization of ethylene to 1-hexene and 1-octene.

Description

technical field [0001] The present invention relates to a process for the oligomerization of olefin monomers. Background technique [0002] Efficient catalytic trimerization or tetramerization of olefin monomers such as ethylene trimerization and tetramerization to 1-hexene and 1-octene is of paramount importance for the preparation of olefin trimers and tetramers of varying commercial value field. Specifically, 1-hexene is a valuable comonomer for linear low-density polyethylene (LLDPE), and 1-octene is a plasticizer alcohol, fatty acid, detergent alcohol and lubricating oil additives in the production Valuable chemical intermediate as well as valuable comonomer in the production of polymers such as polyethylene. 1-hexene and 1-octene can also be prepared by conventional transition metal oligomerization methods, although trimerization and tetramerization routes are preferred. [0003] Several different catalytic systems for the trimerization of ethylene to 1-hexene have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/36C07C11/107B01J31/24
CPCC07C2531/24B01J31/188B01J2531/62C07F9/46B01J31/143B01J2531/66B01J2531/64C07C2/36C07C2/24B01J31/24C07C11/02C07B61/00
Inventor E·J·M·德布尔H·范德海耶登Q·A·奥J·P·斯密特A·范佐恩
Owner SHELL INT RES MAATSCHAPPIJ BV
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