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Modifying organoaluminum co-catalysts for improved performance

A modifier and catalyst technology, applied in catalysts, organic chemistry, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of too long initial induction period of polymer formation

Active Publication Date: 2016-09-28
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For Commercial Alphabutol TM system, polymer formation and an excessively long initial induction period are major disadvantages

Method used

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  • Modifying organoaluminum co-catalysts for improved performance
  • Modifying organoaluminum co-catalysts for improved performance
  • Modifying organoaluminum co-catalysts for improved performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0069] The following examples are merely illustrative of the subject matter of the present disclosure and they should not be considered as limiting the scope of the subject matter of the present disclosure in any way.

[0070] The following experiments were performed in a 300 mL jacketed Parr autoclave reactor (Parr Modell 4566). Standard conditions are 23 bar ethylene pressure and 60°C for 1 hour.

[0071] Commercial Alphabutol TM system

[0072] To use commercial Alphabutol TM The experiment was systematically performed by dissolving 1 mL of a catalytic solution containing 45 vol.% THF and 55 vol% of TNBT in 50 mL of n-hexane prepared in a glove box under a nitrogen atmosphere. Before use, add 3.6 mL of 1M TEAL solution to activate TNBT. The activated catalyst composition was introduced into the reactor by vacuum suction. The reactor was then pressurized with ethylene from a 2-liter aluminum cylinder (ethylene supply) to achieve the desired pressure (23 bar in most expe...

Embodiment approach 1

[0079] Embodiment 1. A method of preparing a catalyst composition comprising: treating an organoaluminum compound with a modifier that reduces the initial reduction strength of the organoaluminum compound, wherein the modifier is selected from the group consisting of ethers , anhydrides, amines, amides, silicates, silyl ethers, siloxanes, esters, carbonates, carbamates, ureas, sulfoxides, sulfones, phosphoramides, silanes and acetals; transition metal complexes adding to a mixture of an organoaluminum compound and a modifier; and obtaining a catalyst composition comprising an organoaluminum compound and a transition metal complex.

Embodiment approach 2

[0080] Embodiment 2. The method of embodiment 1, wherein the transition metal complex comprises at least one metal of Groups IV-B, V-B, VI-B and VIII of the Periodic Table of the Elements, preferably wherein the metal is titanium, zirconium , hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron, cobalt, nickel or combinations thereof, more preferably, wherein the transition metal complex is tetra-n-butoxytitanium.

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Abstract

The invention provides modifying organoaluminum co-catalysts for improved performance. Processes of making catalyst compositions are provided. In an exemplary embodiment, the processes include modifying an organoaluminum compound with a modifier that decreases the initial reducing strength of the organoaluminum compound, where the modifier can be an ether, an anhydride, an amine, an amide, a silicate, a silyl ether, a siloxane, an ester, a carbonate, a urea, a carbamate, a sulfoxide, a sulfone, a phosphoramide, or a combination thereof. The processes further include adding a transition metal complex to the mixture of the organoaluminum compound and the modifier; and obtaining a catalyst composition including the organoaluminum compound and the transition metal complex.

Description

technical field [0001] The subject matter of the present disclosure relates to methods of modifying organoaluminum cocatalysts and methods of preparing catalyst compositions for use in olefin oligomerization processes and other processes. Background technique [0002] Various catalytic methods include cocatalysts based on organoaluminum compounds such as TEAL (triethylaluminum), EASC (sesquiethylaluminum chloride) and others. Such cocatalysts can be used in combination with other catalysts, such as transition metal complexes, to carry out various catalytic processes and promote various chemical reactions. In particular, organoaluminum cocatalysts are used for olefin oligomerization processes. For example, an organoaluminum cocatalyst can be used in combination with a transition metal complex to prepare a catalyst composition capable of oligomerizing ethylene (ethene) to 1-butene. Organoaluminum cocatalysts can also be used in various olefin polymerization processes. For e...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J31/14
CPCB01J31/0204B01J31/0212B01J2231/20B01J2531/007B01J31/143B01J35/19B01J37/04B01J2231/10C07C2/34C07C2531/14C08F110/08
Inventor 塞巴斯蒂亚诺·利丘利罗兰·施密特
Owner SABIC GLOBAL TECH BV
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