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A method for producing 1-hexene co-production heptene and octene

A technology of heptene and hexene, which is applied in the field of preparation of α-olefins, can solve the problem that heptene and octene cannot be produced, and achieve the effects of increasing product added value, improving performance, and wide application prospects

Active Publication Date: 2017-06-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the products produced by the above method are carbon 6 products such as 1-hexene, 2-hexene, and 3-hexene, and it is almost impossible to generate heptene and octene with the same high added value.

Method used

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  • A method for producing 1-hexene co-production heptene and octene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 80ml of n-heptane solution into a reaction kettle with a mechanical stirring device under the protection of ethylene, start heating up to 100°C, and quickly add the heptane solution of the prepared catalyst system into the kettle. Calculated as 0.1mmol / L (the total volume of the solution in the kettle), the molar ratio of the three components added a:b:c (ie chromium isooctanoate:2,5-dimethylpyrrole:triethylaluminum) is 1:5:80, after stirring for 3 minutes, feed a mixed gas of ethylene / propylene with a molar ratio of 1:0.5 into the kettle, and the pressure reaches 3.0MPa to initiate the reaction. The reaction temperature is controlled at 100°C, and the reaction time is 0.5h. When the reaction time reaches the requirement, the jacket water is cooled to normal temperature, the stirring is stopped, the gas and liquid phases are measured separately, and samples are taken for analysis. The gas and liquid phase products are analyzed by gas chromatography, and the products ...

Embodiment 2

[0025] Same as Example 1, except that the molar ratio of ethylene / propylene mixed gas is 1:0.25, and the pressure is 5.0 MPa. According to the product weight, the catalyst efficiency is 286283g product / gCr.h, and the selectivities of heptene and octene are 2.36% and 1.58%. See Table 1 for the data.

Embodiment 3

[0027] Same as Example 1, except that the amount of the catalyst is 0.2 mmol / L in terms of chromium, and the pressure is 4.0 MPa. According to the product weight, the catalyst efficiency is 259357g product / gCr.h, wherein the selectivity of heptene and octene is 3.87%, 2.35%. See Table 1 for the data.

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Abstract

The invention discloses a method for producing 1-hexene and coproducing heptene and octane. A trimerization reaction of ethylene and propylene is carried out under the action of a catalyst system to obtain a product containing 1-hexene, heptene and octane, wherein the catalyst system comprises a chromium-containing compound with the general formula of CrRm, a ligand selected from a heterocyclic compound and a phosphine-containing ligand, and an organo-aluminum compound, wherein R is selected from inorganic or organic groups. The method allows 1-hexene to be produced and heptene and octane with high added values to be coproduced through trimerization of ethylene and propylene, and has a wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing α-olefins, more specifically, relates to a method for preparing 1-hexene by trimerization of ethylene and propylene to co-produce heptene and octene. Background technique [0002] 1-hexene, heptene and octene are very useful organic chemical raw materials and are widely used. 1-Hexene is an important basic organic chemical raw material. Through research and development, it has been shown that 1-Hexene has a significant effect on improving the performance of polyolefin in the plant. It is mainly used as a comonomer for the production of high-quality polyethylene and as a raw material for some fine chemicals. Heptene and octene are mainly used in the production of synthetic lubricating oil base oils and as raw materials for producing isooctyl alcohol through oxo-synthesis. They can also be hydrogenated into high-octane gasoline modulation components, which can increase the added value of products and have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/107C07C11/02C07C2/36B01J31/22C07C2/32
Inventor 张立超栗同林吴红飞韩春卉
Owner CHINA PETROLEUM & CHEM CORP