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Process unit and method for preparing cyclohexanol from cyclohexene

A process method and cyclohexene technology are applied in chemical instruments and methods, alcoholysis preparation, carboxylate preparation and other directions, which can solve the problems of high operation cost and equipment cost, high raw material price and high production cost, and achieve easy operation. , The effect of reducing equipment investment and high conversion rate

Pending Publication Date: 2020-08-21
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, nickel catalyst is generally used for phenol hydrogenation, the yield is close to the theoretical value, the product purity is high, and the reaction is stable, but the production cost is too high due to the high price of raw materials in the modified method.
The oxidation of cyclohexane is to first generate cyclohexyl hydroperoxide, and then decompose into cyclohexanol and cyclohexanone. The reaction of this method is more complicated, and its operating cost and equipment cost are relatively high.

Method used

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  • Process unit and method for preparing cyclohexanol from cyclohexene
  • Process unit and method for preparing cyclohexanol from cyclohexene

Examples

Experimental program
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Effect test

Embodiment 1

[0058] A process for preparing cyclohexanol from cyclohexene, comprising the following steps:

[0059] (1) Pre-reaction: cyclohexene and formic acid (the molar ratio of formic acid and cyclohexene is 1.2:1) enters the reactor from feed port A, and the space velocity is 0.5h -1 Under the catalysis of the KC119 type macroporous acid resin catalyst in the reactor, react to obtain cyclohexyl formate, and the reaction product is cyclohexyl formate, unreacted cyclohexene, unreacted formic acid generated by the reaction, and the reaction product It is discharged from the outlet A and enters the catalytic distillation tower through the inlet B; the reaction temperature of the reactor is 40°C, and the pressure is 0.1MPa.

[0060] (2) catalytic distillation reaction: the reaction product obtained in step (1) (0.5h -1 ) enters in the catalytic distillation tower, and unreacted cyclohexene, unreacted formic acid continue to react and continue to obtain cyclohexyl formate in the KC119 typ...

Embodiment 2

[0066] A process for preparing cyclohexanol from cyclohexene, comprising the following steps:

[0067] (1) Pre-reaction: cyclohexene and acetic acid (the molar ratio of acetic acid and cyclohexene is 4:1) enter the reactor from feed port A, and the space velocity is 2.5h -1 Under the catalysis of the KC104 type mesoporous acidic resin catalyst in the reactor, react to obtain cyclohexyl acetate, and reaction product is cyclohexyl acetate, unreacted cyclohexene, unreacted acetic acid that reaction generates, and reacts The product is discharged from outlet A and enters the catalytic distillation tower through inlet B; the reaction temperature of the reactor is 50°C and the pressure is 0.5MPa.

[0068] (2) catalytic distillation reaction: the reaction product obtained in step (1) (space velocity is 2.5h -1 ) enters in the catalytic distillation tower, unreacted cyclohexene, unreacted acetic acid continue to react and continue to obtain cyclohexyl acetate in the KC104 type mesopo...

Embodiment 3

[0074] A process for preparing cyclohexanol from cyclohexene, comprising the following steps:

[0075] (1) Pre-reaction: cyclohexene and propionic acid (the molar ratio of propionic acid and cyclohexene is 6:1) enters the reactor from feed port A, and the space velocity is 4h -1 Under the catalysis of the KIP213 type gel-type acid resin catalyst in the reactor, react to obtain cyclohexyl propionate, and reaction product is the cyclohexyl propionate that reaction generates, unreacted cyclohexene, unreacted propylene Acid, the reaction product is discharged from the outlet A and enters the catalytic distillation tower through the inlet B; the reaction temperature of the reactor is 100°C, and the pressure is 0.8MPa.

[0076] (2) catalytic distillation reaction: the reaction product obtained in step (1) (space velocity is 4h -1 ) enters in the catalytic distillation tower, and unreacted cyclohexene, unreacted propionic acid continue to react and continue to obtain cyclohexyl prop...

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Abstract

The invention discloses a process unit and a method for preparing cyclohexanol from cyclohexene. The process unit comprises a reactor, a catalytic distillation tower, a hydrogenation reactor, a gas-liquid separation tank and a distillation tower which are connected in sequence. According to the invention, cyclohexene and organic acid are subjected to a pre-reaction in a reactor, and a catalytic distillation reaction is performed in the catalytic distillation tower to obtain a heavy component containing organic acid cyclohexyl ester; heavy components of the organic acid cyclohexyl ester are subjected to a hydrogenation reaction with hydrogen in the hydrogenation reactor to generate cyclohexanol, organic alcohol and unreacted hydrogen; and the above products are sequentially subjected to gas-liquid separation and distillation separation to obtain the organic alcohol and the cyclohexanol. The method is high in cyclohexene conversion rate, high in cyclohexanol yield and low in equipment and operation cost.

Description

technical field [0001] The invention relates to a process device and a process method for preparing cyclohexanol from cyclohexene, belonging to the technical field of chemical engineering. Background technique [0002] As an important chemical raw material, cyclohexanol is traditionally prepared by hydrogenation of phenol and oxidation of cyclohexane. Among them, nickel catalyst is generally used for phenol hydrogenation, the yield is close to the theoretical value, the product purity is high, and the reaction is stable, but the production cost is too high due to the high price of raw materials in the modified method. The cyclohexane oxidation is first to generate cyclohexyl hydroperoxide, and then decomposes into cyclohexanol and cyclohexanone. This method is more complicated in reaction, and its operating cost and equipment cost are relatively high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a process dev...

Claims

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Application Information

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IPC IPC(8): C07C35/08C07C29/128C07C29/80
CPCC07C29/1285C07C29/80C07C67/08C07C35/08C07C69/06C07C69/14C07C69/24Y02P20/10
Inventor 郭为磊张美娟杨建波毛进池尹志义
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH