A kind of method of producing cyclohexanone oxime and acetone simultaneously

A technology of cyclohexanone oxime and cyclohexanone, which is applied in the field of simultaneous production of cyclohexanone oxime and acetone, to achieve the effects of easy operation, simple process flow, and environmental protection

Active Publication Date: 2018-03-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the simultaneous production of acetone and cyclohexanone oxime using the mixture of cyclohexanone and isopropanol directly as raw material in the presence of oxygen.

Method used

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  • A kind of method of producing cyclohexanone oxime and acetone simultaneously
  • A kind of method of producing cyclohexanone oxime and acetone simultaneously
  • A kind of method of producing cyclohexanone oxime and acetone simultaneously

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Experimental program
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Effect test

Embodiment 1

[0042] In the tank reactor, under an oxygen atmosphere (an atmosphere formed by oxygen with a purity of 99%), cyclohexanone, liquid ammonia and isopropanol are contacted with the original powder of titanium silicon molecular sieve TS-1 as a catalyst, Among them, the molar ratio of cyclohexanone to isopropanol is 1:5, the molar ratio of cyclohexanone to ammonia is 1:1.5, the weight ratio of cyclohexanone to catalyst is 20:1, the temperature is 90°C, and the pressure is 1.5MPa (gauge pressure), the oxygen partial pressure is 1.5MPa. After reacting for 2 hours, the mixture obtained was filtered, and the liquid mixture obtained was collected and analyzed by gas chromatography, thereby obtaining the conversion rate of cyclohexanone, the conversion rate of Virahol, the selectivity of cyclohexanone oxime and the selectivity of acetone, and the results were in Listed in Table 1.

Embodiment 2

[0044] Cyclohexanone was oxidized by the same method as in Example 1, except that a hollow titanium-silicon molecular sieve of equal mass was used instead of titanium-silicon molecular sieve TS-1, and the temperature was 60°C. The experimental results are listed in Table 1.

Embodiment 3

[0046] Cyclohexanone was oxidized by the same method as in Example 1, except that the reaction temperature was 120°C. The experimental results are listed in Table 1.

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Abstract

The invention provides a method used for synchronous production of cyclohexanone-oxime and acetone. According to the method, in the presence of oxygen, cyclohexanone, ammonia, and isopropanol are contacted with a titanium silicalite molecular sieve so as to obtain a mixture containing cyclohexanone-oxime and acetone. The method is capable of achieving relatively high cyclohexanone conversion rate and relatively high cyclohexanone-oxime selectivity, and producing side product acetone at the same time. The method is capable of realizing synchronous production of cyclohexanone-oxime and acetone; the raw materials are friendly to the environment; less environmental pollutant is generated; it is more beneficial for environment protection; and in addition, no solvent is used in the method, the raw materials are all used directly, preparation of solutions is not necessary, and device effective processing amount is not influenced.

Description

technical field [0001] The invention relates to a method for simultaneously producing cyclohexanone oxime and acetone. Background technique [0002] Cyclohexanone oxime is a key intermediate for the synthesis of caprolactam and an important chemical raw material, mainly used as a raw material for the preparation of nylon 6 monomer for fiber nylon 6 and engineering plastics. [0003] Since titanium-silicon molecular sieve catalysts play a very important role in the selective oxidation of organic compounds, as a preparation method for cyclohexanone oxime, it has been proposed to use hydrogen peroxide and ammonia to react cyclohexanone oxime in the presence of titanium-silicon molecular sieve catalysts. A method for ammoximation of ketones. The advantage of this method is that it does not need to use ammonia to neutralize sulfuric acid like the previous method of oximation with hydroxylamine sulfate. [0004] But, as the most commonly used oxidizing agent in the peroxide oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C251/44C07C249/04C07C49/08C07C45/32
Inventor 林民史春风朱斌
Owner CHINA PETROLEUM & CHEM CORP
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