Method for preparing cyclopentanone through dehydrogenation of cyclopentanol

A technology of cyclopentanone and cyclopentanol, which is applied in the field of cyclopentanone dehydrogenation to prepare cyclopentanone, can solve the problems of high energy consumption and low catalyst efficiency, and achieve the effect of improving reaction efficiency and reducing energy consumption

Active Publication Date: 2016-04-06
SHANGHAI PEARLK CHEM
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Problems solved by technology

But because the cyclopentanol load WWH of the catalyst is only 0.3~1.5hr -1 ,

Method used

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  • Method for preparing cyclopentanone through dehydrogenation of cyclopentanol
  • Method for preparing cyclopentanone through dehydrogenation of cyclopentanol
  • Method for preparing cyclopentanone through dehydrogenation of cyclopentanol

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Embodiment 1～10

[0016] The dehydrogenation reactor is a stainless steel tubular reactor with a size of φ25mm×1000mm, and 100ml of catalyst is filled in the reaction tube. The catalyst uses Ni and Cu as active components, Al 2 o 3 with SiO 2 The mixture is used as a carrier, the content of Ni is 30-50wt%, and the content of Cu is 1-5wt%. The bottom of the reactor is filled with inert ceramic balls. After the dehydrogenation raw material is preheated, the pump enters the reactor from the top through the distributor at a set rate to carry out the dehydrogenation reaction. The dehydrogenation material enters a gas-liquid separator from the bottom of the dehydrogenation reactor, and the liquid phase material enters the product storage tank. The system pressure is controlled by the hydrogen regulating valve separated from the gas-liquid separator. The cyclopentanol conversion and cyclopentanone selectivity of concrete reaction conditions, dehydrogenation reaction are listed in Table 1.

[0017...

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Abstract

The invention relates to a method for preparing cyclopentanone through dehydrogenation of cyclopentanol. According to the method, the cyclopentanone is prepared through dehydrogenation of the cyclopentanol by the aid of a fixed bed layer comprising a Ni-Cu/Al2O3-SiO2 catalyst. The hourly space velocity of a volume liquid for a dehydrogenation reaction is 0.5-2.0 hr<-1>, the system pressure is 0.05-1.0 bar, and the reaction temperature is 100-140 DEG C; the content of an active ingredient, namely, nickel, of the dehydrogenation catalyst Ni-Cu/Al2O3-SiO2 is 30wt%-50wt% of the mass of a supporter, the content of copper of a promoter is 1wt%-5wt% of the mass of the supporter, and the supporter is a mixture of Al2O3 and SiO2; the conversion per pass of the dehydrogenation reaction is higher than 70%, and the selectivity of the cyclopentanone is close to 100%. The reaction efficiency is obviously improved, and the energy consumption is substantially reduced.

Description

technical field [0001] The invention relates to a method for preparing cyclopentanone by dehydrogenating cyclopentanol, in particular to using Ni-Cu / Al 2 o 3 -SiO 2 Fixed-bed catalyst, method for dehydrogenating cyclopentanol into cyclopentanone. Background technique [0002] Cyclopentanone is an intermediate in the perfume and pharmaceutical industries, and can be used to produce fine chemical products such as new perfume methyl dihydrojasmonate and brandyne and anxiolytic buspirone, and can also be used in insecticides and herbicides In addition, because cyclopentanone has good solubility, it is widely used as a solvent in the electronics industry. The by-product C produced by cracking naphtha to ethylene 5 The cyclopentene separated from the fraction can be used as raw material to produce cyclopentanone. The main process is cyclopentene N 2 O direct oxidation method and cyclopentene hydration-dehydrogenation method are two technical routes. N 2 Although the product...

Claims

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Application Information

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IPC IPC(8): C07C45/29C07C49/395B01J23/755
CPCB01J23/755C07C45/29C07C49/395
Inventor 石康明
Owner SHANGHAI PEARLK CHEM
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