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Catalytic isomerization reaction method

An isomerization and reaction technology, applied in the field of catalytic isomerization reaction, can solve the problems of complex process flow, unstable conversion rate, low catalytic activity, etc., and achieve the effects of simple process flow, good economic benefits and high conversion rate

Inactive Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the technical process existing in the prior art is complex, difficult to operate, low catalytic activity, unstable conversion rate, etc., and a new method for catalytic isomerization reaction is provided, which is used for When catalyzing the isomerization reaction, it has the advantages of simple process flow, easy operation, high catalytic activity, and good conversion stability.

Method used

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  • Catalytic isomerization reaction method

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Effect test

Embodiment 1

[0025] press figure 1 The process flow diagram shown performs ionic liquid catalyzed isomerization reaction.

[0026] The raw material C6 raffinate including 40% isohexane, 30% n-hexane and 30% methylcyclopentane is heated to 60°C through dryer 1 and preheater 2 at a certain flow rate, and then enters stirred tank reactor 3 , Control the volume ratio of oil in the stirred tank reactor 3 to 3, the speed of the stirrer at 200 rpm, the reaction temperature at 70°C, and the pressure at 0.15 MPa, and control the liquid level of the stirred tank reactor 3 to make the materials in the reaction system The residence time is 2.5h. Part of the material leaving the reactor is circulated back to the stirred tank reactor 3 through the circulating pump 4, and part of it enters the liquid-liquid separation tank 7. In the liquid-liquid separation tank 7, the ionic liquid catalyst and the reaction product are allowed to stand and layer, and the upper reaction product is collected The output ente...

Embodiment 2

[0029] The raw material C6 raffinate including 90% methylcyclopentane, 10% cyclohexane, and 10ppm water is dehydrated to 5ppm by dryer 1 and heated to 80°C by preheater 2 at a certain flow rate, and then enters the stirred tank for reaction Reactor 3, control the volume ratio of oil in the stirred tank reactor 3 to 5, the speed of the stirrer at 150 rpm, the reaction temperature at 80°C, the nitrogen to maintain the pressure at 1.0 MPa, and control the liquid level of the stirred tank reactor 3 to make The residence time of the materials in the reaction system is 1.5h. Part of the material leaving the reactor is circulated back to the stirred tank reactor 3 through the circulating pump 4, and part of it enters the liquid-liquid separation tank 7. In the liquid-liquid separation tank 7, the ionic liquid catalyst and the reaction product are allowed to stand and layer, and the upper reaction product is collected The output enters the product tank, and the output volume of the rea...

Embodiment 3

[0032] The raw material C6 raffinate including 5% isohexane, 10% n-hexane, 80% methylcyclopentane and 5% cyclohexane is heated to 50°C through dryer 1 and preheater 2 at a certain flow rate Enter the stirred tank reactor 3, control the volume ratio of oil in the stirred tank reactor 3 to 1, the speed of the stirrer is 100 rpm, the reaction temperature is 60 ℃, the nitrogen pressure is 0.3 MPa, and the liquid in the stirred tank reactor 3 is controlled. Position so that the residence time of the material in the reaction system is 5h. Part of the material leaving the reactor is circulated back to the stirred tank reactor 3 through the circulating pump 4, and part of it enters the liquid-liquid separation tank 7. In the liquid-liquid separation tank 7, the ionic liquid catalyst and the reaction product are allowed to stand and layer, and the upper reaction product is collected The output enters the product tank, and the output volume of the reaction product is controlled to be con...

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Abstract

The invention relates to a catalytic isomerization reaction method. The method comprises that C6 raffinate oil undergoes a reaction in the presence of an ionic liquid catalyst under conditions of a volume ratio of 0.1 to 5, a reaction temperature of 50 to 80 DEG C, reaction pressure of 0.1 to 1.0 MPa and staying time of 0.5 to 12h to produce cyclohexane, a part of the reaction product is returned to a reactor, a part of the reaction product is fed into a liquid-liquid separator, the reaction product and the catalyst are separated, active components in an active component supply tank are supplied to the catalyst in the lower layer, then the catalyst in the lower layer is returned to the reactor and the product in the upper layer is fed into a product tank. The catalytic isomerization reaction method has simple production processes, guarantees the recycling of the ionic liquid catalyst, realizes timely supplement of active components, keeps lasting activity of the catalyst and can be used in continuous industrial production of a related ionic liquid catalytic reaction.

Description

Technical field [0001] The invention relates to a method for catalyzing isomerization reaction, which can be applied to the industrial continuous production of related ionic liquid catalyzing isomerization reaction Background technique [0002] In the process of naphtha cracking to produce ethylene, pyrolysis gasoline undergoes two stages of hydrogenation and aromatics extraction to produce a large amount of raffinate oil. At present, the raffinate oil is mainly used to produce solvent oil, and there is basically no increase in value-added utilization. It is returned to the cracking furnace as a cracking raw material, but due to the high content of cycloalkanes, the olefin yield is low; and the higher cyclopentane and methylcyclopentane are not suitable for use as reforming raw materials. C6 alkanes account for more than 40% of the raffinate, which contains a large amount of cycloalkanes including methylcyclopentane and cyclohexane. Therefore, the C6 fraction is separated from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/18C07C5/31
Inventor 刘银川孙翟宗杨卫胜
Owner CHINA PETROLEUM & CHEM CORP
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