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Catalyst compositions for ethylene dimerization

A composition and catalyst technology, applied in the direction of catalysts, hydrocarbons, hydrocarbons, etc., can solve the problems of excessively long initial induction period of polymer formation

Inactive Publication Date: 2016-08-24
SAUDI BASIC IND CORP SA
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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 excessively long initial induction period are major disadvantages

Method used

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  • Catalyst compositions for ethylene dimerization
  • Catalyst compositions for ethylene dimerization
  • Catalyst compositions for ethylene dimerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 2.75 ml of TNBT were mixed with 2.65 ml of 1,4-dioxane (with a density p of 1.03). About 2.2 ml of 1M TEAL dissolved in 50 ml of n-hexane was added to 50 ml of TNBT / 1,4-dioxane mixture to obtain a catalytic solution. The catalytic solution was added to the reactor by vacuum suction. The reactor was then pressurized with ethylene from a 2 liter aluminum cylinder (ethylene supply) to the desired pressure (23 bar in most experiments). The reaction pressure was controlled using a back pressure regulator while the ethylene consumption was measured using a scale on which the gas cylinder was placed. The reactor was equipped with thermocouples to measure the temperature inside the reactor. Record temperature, pressure, and ethylene consumption data using a data acquisition system. Before the catalyst solution was injected, the reactor was heated to 80° C. under vacuum for at least two hours to remove all traces of moisture. Temperature controlled by heating mantle / furnace ...

Embodiment 2

[0053] A mixture of TNBT, 1,4-dioxane and THF was prepared. These mixtures were then mixed with about 2.3 ml of a 1M TEAL solution dissolved in 50 ml of n-hexane to obtain a catalytic solution for the preparation of 1-butene as described in Example 1 above. The total ethylene consumption of these mixtures after 1 hour is shown in Table 1.

[0054] Table 1

[0055]

[0056] The present invention is further illustrated by the following embodiments.

Embodiment approach 1

[0057] Embodiment 1. A catalyst composition comprising an organotitanium compound, an organoaluminum compound, and a cyclic diether, a linear diether, or a combination comprising at least one of the foregoing.

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PUM

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Abstract

Catalyst compositions that are suitable for producing 1-butene are provided. In an exemplary embodiment, the catalyst compositions include an organic titanium compound, an organic aluminum compound, and a linear diether. Processes for converting ethylene to 1- butene by using these catalyst compositions are also provided.

Description

technical field [0001] The subject matter of the present disclosure relates to catalyst compositions suitable for the catalytic dimerization of ethylene to produce 1-butene and methods for converting ethylene to 1-butene. Background technique [0002] The compound 1-butene has long been a desired substance in the chemical industry. 1-Butene can not only be converted into polybutene-1 and butylene oxide (butylene oxide, butylene oxide), it can also be used as a comonomer with ethylene to produce polyethylene with high strength and high stress crack resistance resin. The major industrial routes used to produce 1-butene include C 4 Steam cracking of hydrocarbon streams, ethylene oligomerization processes, refinery operations of crude oil and ethylene dimerization processes. Catalytic dimerization of ethylene to 1-butene through the propagation reaction of organoaluminum compounds to produce higher chain polymers (Ziegler, Angew.Chem. (1952); 64:323-329; J.Boor, Editor, Zieg...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J31/14
CPCB01J31/0204B01J31/0212B01J31/143B01J2231/20B01J2531/007C07C2/26C07C11/08B01J31/2208B01J2531/46C07C2/32C07C2531/14C07C2531/22C08F10/08
Inventor 罗兰·施密特
Owner SAUDI BASIC IND CORP SA
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