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Producing method of cyclohexanone product by Phenol hydrogenation reaction

A hydrogenation reaction, cyclohexanone technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carbon-based compounds, etc., can solve problems such as poor selectivity

Inactive Publication Date: 2012-08-29
CHINA PETROCHEM DEVMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the aforementioned patent documents, in order to overcome the shortcoming of poor selectivity of the reaction itself, multiple distillation processes and purification steps must be added at the back end of the reaction, or the selectivity of the product must be improved by improving the catalyst activity

Method used

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  • Producing method of cyclohexanone product by Phenol hydrogenation reaction
  • Producing method of cyclohexanone product by Phenol hydrogenation reaction
  • Producing method of cyclohexanone product by Phenol hydrogenation reaction

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Embodiment Construction

[0010] The features and functions of the present invention are further described below through specific examples, but they are not intended to limit the scope of the present invention.

[0011] According to the aforementioned preferred embodiments of the present invention, the hydrogenation reaction is carried out under the respective reaction conditions of each example to convert phenol into cyclohexanone.

[0012] 1. The influence of hydrogen concentration on the reaction result:

[0013]

[0014] Reaction conditions: the gravimetric space velocity per hour is 1.5, the molar ratio of hydrogen to phenol is 4, and the reaction pressure is 14.7 psig.

[0015] The reaction of embodiment 1 and 2 uses Johnson Matthey commercial catalyzer (Type 355, contains 0.8%Pd), when adding hydrogen concentration ratio and down to 44% by 80%, the selectivity of reaction product cyclohexanone is promoted to 91.3% by 85.2% %, and the conversion rate of the whole reaction and the total amount...

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Abstract

Provided is a producing method of a cyclohexanone product by Phenol hydrogenation reaction. The step of diluting hydrogen concentration by leading in extra gas can increase yield and decrease energy consumption.

Description

technical field [0001] The present invention relates to the hydrogenation reaction of gaseous phenol and hydrogen containing a specific amount of diluent gas to produce cyclohexanone. Background technique [0002] Cyclohexanone is an important intermediate required for the formation of caprolactam, which is an important monomer for the formation of nylon-6. The industrial preparation of cyclohexanone is mostly through the oxidation reaction of cyclohexane or the hydrogenation reaction of phenol. Severe reaction conditions are required for the oxidation reaction of cyclohexane, and by-products such as cyclohexanol or organic acids will be generated, resulting in a low conversion rate of the reaction and a low selectivity of cyclohexanone, so it will be difficult for industrial preparation. There are problems of energy consumption and separation complexity. As for the method of preparing cyclohexanone by hydrogenation of phenol, it can be divided into a one-step method of di...

Claims

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Application Information

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IPC IPC(8): C07C49/403C07C45/00
Inventor 李伟英陈盈佃洪瑞聪
Owner CHINA PETROCHEM DEVMENT
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