Method for preparing adipic acid by oxidizing cyclohexene with air under catalysis of non-metal carbon

A non-metal, cyclohexene technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylates, etc., can solve the problems of high reaction temperature, long reaction time, easy deactivation, etc. Simple, environmentally friendly system and high catalytic activity

Inactive Publication Date: 2013-07-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the noble metal catalyst is used in the one-step catalytic oxidation reaction to produce adipic acid, it is difficult for the noble m

Method used

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  • Method for preparing adipic acid by oxidizing cyclohexene with air under catalysis of non-metal carbon
  • Method for preparing adipic acid by oxidizing cyclohexene with air under catalysis of non-metal carbon

Examples

Experimental program
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Example Embodiment

[0027] Example 1: Weigh 0.2 g of acidified carbon nanotubes and put them into a 50 mL stainless steel autoclave containing 10 mL of deionized water. Place the reactor in an ultrasonic instrument and sonicate for 30 minutes until the graphene oxide is uniformly dispersed in the water. Then put 0.62 mL (0.50g) of cyclohexene into it, then replace the air in the autoclave with oxygen, and then add oxygen to a total pressure of 1 MPa. Increase the internal temperature of the autoclave by 80 o C, stir for 8 hours. After the reaction is over, cool the autoclave to room temperature, open the autoclave to take out the reaction liquid and filter, and then separate the filtrate after standing. The upper oil phase is measured by gas chromatography, and the lower water phase is measured by liquid chromatography to obtain a cyclohexene conversion rate of 32%. , Adipic acid selectivity 17%.

Example Embodiment

[0028] Example 2: Weigh 0.5 g of acidified carbon nanotubes and put them into a 50 mL stainless steel autoclave containing 10 mL of deionized water, put the reactor in an ultrasonic instrument, and sonicate for 30 minutes until the graphene oxide is uniformly dispersed in the water. Then put 0.62 mL (0.50 g) of cyclohexene into it, and then replace the air in the autoclave with oxygen, and then add oxygen to a total pressure of 2 MPa. Increase the internal temperature of the autoclave by 100 o C, stir for 8 hours. After the reaction is over, cool the autoclave to room temperature, open the autoclave to take out the reaction liquid and filter, and then separate the filtrate after standing. The upper oil phase is measured by gas chromatography, and the lower aqueous phase is measured by liquid chromatography to obtain a cyclohexene conversion rate of 44%. , Adipic acid selectivity 27%.

Example Embodiment

[0029] Example 3: Weigh 0.5 g of acidified carbon nanotubes and put them into a 50 mL stainless steel autoclave containing 10 mL of deionized water, put the reactor in an ultrasonic instrument, and sonicate for 30 minutes until the graphene oxide is uniformly dispersed in the water. Then put 0.62 mL (0.50g) of cyclohexene into it, and then replace the air in the autoclave with oxygen, and then add oxygen to a total pressure of 2 MPa. Increase the internal temperature of the autoclave by 120 o C, stir for 8 hours. After the reaction is over, cool the autoclave to room temperature, open the autoclave to take out the reaction liquid and filter, and then separate the filtrate after standing. The upper oil phase is measured by gas chromatography, and the lower water phase is measured by liquid chromatography to obtain a cyclohexene conversion rate of 56%. , Adipic acid selectivity is 40%.

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Abstract

The invention belongs to the technical field of catalysis and synthesis and in particular relates to a method for preparing adipic acid by oxidizing cyclohexene with air under catalysis of non-metal carbon. The method adopts cyclohexene as a raw material, a non-metal carbon material as a catalyst, molecule oxygen as an oxygen source, and the adipic acid is catalyzed and synthesized in one step. According to the method, the adipic acid is prepared by oxidizing cyclohexene with air under catalysis of non-metal carbon, the used equipment and process are simple, the catalyst is low in price and easy to prepare and has high catalysis activity and high selectivity, no pollution is caused, the system is environmental-friendly, and the method is an environment-friendly process.

Description

technical field [0001] The invention belongs to the technical field of catalytic synthesis, and in particular relates to a method for preparing adipic acid by non-metallic carbon catalytic air oxidation of cyclohexene. Background technique [0002] Adipic acid, also known as fatty acid, is one of the most valuable dibasic acids among aliphatic dicarboxylic acids. It is mainly used in the production of nylon 66 fibers, nylon 66 engineering plastics, polyurethane, foam plastics and plasticizers. Polymeric fibers with industrial value can also be used to produce high-grade lubricating oil, food additives, pharmaceutical intermediates, fragrance and flavor control agents, plastic foaming agents, paint insecticides, adhesives and dyes, etc., with a wide range of uses. [0003] At present, almost all adipic acid manufacturers in foreign countries adopt the nitric acid oxidation process route using the mixture of cyclohexanol and cyclohexanone (commonly known as KA oil) as the raw ...

Claims

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Application Information

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IPC IPC(8): C07C55/14C07C51/25
Inventor 曹勇黄海柳翔刘永梅
Owner FUDAN UNIV
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