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High-carbon alpha-olefine preparing process and apparatus

An olefin and high-carbon technology, applied in the field of preparation of C4-26 high-carbon α-olefins, can solve problems such as unfavorable reaction, back-mixing, and easy clogging

Inactive Publication Date: 2003-03-19
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, high pressure is required to spray the liquid, and the diameter of the nozzle is very small, which is easy to clog
The reactor shown in Figure 3 of the application specification is a tank with a conical bottom, and the mist flow sprayed in the tank is easy to rotate in the tank, resulting in back mixing, which is unfavorable to the reaction.

Method used

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  • High-carbon alpha-olefine preparing process and apparatus
  • High-carbon alpha-olefine preparing process and apparatus
  • High-carbon alpha-olefine preparing process and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The high-carbon alkyl aluminum is sent into the high-carbon alkyl aluminum preheating furnace with a flow rate of 0.25mol / h by a double plunger metering pump. The outlet temperature is 120°C, and it directly enters the displacement reactor. Ethylene is sent into the ethylene preheating furnace at a flow rate of 12.5mol / h through the gas mass flow meter, the outlet temperature is 300°C, the reaction pressure is 1Mpa, the reaction temperature is 260°C, the single-pass conversion rate of high-carbon alkyl aluminum is 84%, and the α-olefin Selectivity >99%, no product isomerization found.

Embodiment 2

[0055] The high-carbon alkyl aluminum is sent into the high-carbon alkyl aluminum preheating furnace with a flow rate of 0.25mol / h by a double plunger metering pump. The outlet temperature is 120°C, and it directly enters the displacement reactor. Ethylene is fed into the ethylene preheating furnace at a flow rate of 12.5mol / h through the gas mass flow meter, the outlet temperature is 280°C, the reaction pressure is 1Mpa, the reaction temperature is 220°C, the single-pass conversion rate of high-carbon alkyl aluminum is 39%, and the α-olefin Selectivity >99%, no product isomerization found.

Embodiment 3

[0057] Using the same method as in Example 1, the high-carbon alkylaluminum preheating temperature was increased so that the temperature of the high-carbon alkylaluminum entering the replacement reactor was 160 ° C. As a result, the high-carbon alkylaluminum single-pass conversion rate was 85.6%, and α- Olefin selectivity >99%, no product isomerization observed.

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Abstract

The present invention is the preparation process and apparatus for substituting alkyl group in high-carbon aluminium alkyl with ethylene to prepare straight-chain C4-26 alpha-olefine. High-carbon aluminum alkyl after being preheated to 120-180 deg.c is made to enter into a single-stage spraying tubular reactor at a linear speed of 150-300 m / s while ethylene after being preheated to 280-300 deg.c is made to enter into a reactor in tangent direction, so that replacement reaction is performed at 230-300 deg.c and 0.5-1.8 MPa. The atomizing reaction product is cooled to 20-60 deg.c and then, the emulsion is made to enter into the buffering tank in a double-disc separating tower for filming and separating while the gaseous phase is separated in the tower top for reuse. The coarse high-carbon alpha-olefine is fractionationed to obtain the destination product.

Description

technical field [0001] The invention belongs to the field of fine petrochemical industry, and relates to a method and equipment for preparing high-carbon α-olefins, in particular to replacing C with polymer grade ethylene 4-26 Alkyl group in higher carbon alkyl aluminum, preparation C 4-26 A method and apparatus for high carbon alpha-olefins. Background technique [0002] Linear α-C 4-8 Olefins are comonomers of high-density polyethylene and linear low-density polyethylene, and are used in large amounts. Other linear α-olefins are excellent fine chemical raw materials, such as linear α-C 8-12 Olefins are raw materials for the synthesis of high-grade lubricants. Linear α-C 12--16 Olefins are surfactants and detergent raw materials with good synthetic biodegradability. Therefore, α-olefin is a product with good economic benefits and a broad market, and it is the fastest growing chemical industry in the world in recent years. [0003] In 1966, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/06C07C11/04
Inventor 何仁周斌李宝军钱明星王辉汪小伏吕小兵张玉良孔祥国聂金泉刘和平白晨曦郭玉春王庆友邸鸿
Owner DALIAN UNIV OF TECH
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