A preparing method of cyclohexane

A technology of cyclohexane and methylcyclopentane, which is applied in the field of cyclohexane preparation, can solve the problems of harsh operating conditions and long process, and achieve the effects of mild reaction conditions, high product yield and good technical effects

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is the harsh operating conditions and long technical problems...

Method used

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  • A preparing method of cyclohexane

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Experimental program
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Effect test

Embodiment 1

[0020] In a 50ml closed tank reactor, in anhydrous aluminum chloride (AlCl 3 ) catalyst, the reaction temperature is 100 ° C, with methylcyclopentane as the reaction raw material, the reaction raw material and AlCl 3 The weight ratio is 10, the stirring speed is 1000 rpm, the conversion rate of methylcyclopentane after 24 hours of reaction is 63.2%, and the product selectivity of cyclohexane is 99.1%.

[0021] For the convenience of comparison, the catalysts, reaction conditions and reaction results are listed in Table 1.

Embodiment 2

[0023] In a 50ml closed tank reactor, in anhydrous aluminum chloride (AlCl 3 ) catalyst, the reaction temperature is 70 ° C, with methylcyclopentane as the reaction raw material, the reaction raw material and AlCl 3 The weight ratio is 3, the stirring speed is 800 rpm, the conversion rate of methylcyclopentane after 18 hours of reaction is 74.2%, and the selectivity of cyclohexane product is 99.2%.

[0024] For the convenience of comparison, the catalysts, reaction conditions and reaction results are listed in Table 1.

Embodiment 3

[0026] In a 50ml closed tank reactor, in anhydrous aluminum chloride (AlCl 3 ) catalyst, the reaction temperature is 50 ° C, with methylcyclopentane as the reaction raw material, the reaction raw material and AlCl 3 The weight ratio is 1, the stirring speed is 1000 rpm, the conversion rate of methylcyclopentane after 20 hours of reaction is 80.5%, and the selectivity of cyclohexane product is 99.1%.

[0027] For the convenience of comparison, the catalysts, reaction conditions and reaction results are listed in Table 1.

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Abstract

The invention relates to a preparing method of cyclohexane, and mainly overcomes technical problems of cyclohexane production by benzene hydrogenation in the prior art, namely severe operation conditions and long procedures. According to a technical scheme adopted by the method, a material rich in methylcyclopentane is adopted as a raw material and is brought into contact with a catalyst at 50-100 DEG C to produce cyclohexane, the catalyst is at least one of anhydrous aluminum halides, and the weight ratio of the raw material to the catalyst is 1-10. The problems are overcome by adoption of the technical scheme. The method can be used for industrial production of the cyclohexane.

Description

technical field [0001] The invention relates to a method for preparing cyclohexane. Background technique [0002] Cyclohexane is the main raw material for the manufacture of cyclohexanol and cyclohexanone, and further produces adipic acid and caprolactam, which are the main raw materials for the production of polyamide and nylon. In addition, cyclohexane is also used in a small amount as an industrial solvent. [0003] Cyclohexane was initially separated directly from crude oil for industrial production, but its purity was only about 85%. Humble Petroleum Company and Philips Petroleum Company of the United States reported that a series of steps such as reforming, rectification, hydrogenation and isomerization of light distillate oil in petroleum fractions are used to isomerize methylcyclopentane The method of generating cyclohexane can obtain cyclohexane with higher purity, but the product purity cannot meet the needs of polyamide production. [0004] With the development...

Claims

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Application Information

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IPC IPC(8): C07C13/18C07C5/29
Inventor 王德举郭友娣刘师前张勤顾国耀
Owner CHINA PETROLEUM & CHEM CORP
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