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Method for preparing cumene hydroperoxide through oxidation of cumene

A technology of propylbenzene hydroperoxide and cumene, which is applied in the direction of preparation of peroxygen compounds, chemical instruments and methods, preparation of organic compounds, etc., can solve the problem of low selectivity and no improvement of cumene hydroperoxide To specifically inhibit by-products and other issues, to achieve the effect of inhibiting rightward movement and improving yield

Active Publication Date: 2019-11-12
WANHUA CHEM GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN201210429266.9 discloses a method with high conversion rate of cumene, using non-metallic solid carbon catalyst, which is environmentally friendly and cheap, but the selectivity of cumene hydroperoxide is not high
[0008] At the same time, in the existing process technology and scheme, there is no way to specifically inhibit a certain by-product, such as inhibiting the by-product methyl phenyl ketone (PMK)

Method used

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  • Method for preparing cumene hydroperoxide through oxidation of cumene
  • Method for preparing cumene hydroperoxide through oxidation of cumene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1g of 2,4-diphenyl-4-methyl-2-pentene, 7g of by-product inhibitor 1 and 1kg of cumene were added to the reaction kettle, and the rest of the conditions were the same as those of Comparative Example 1.

Embodiment 2

[0059] 5g of 1,1,2-trimethyl-3-phenylindane, 8g of by-product inhibitor 2 and 1kg of cumene were added to the reaction kettle, and the rest of the conditions were the same as those of Comparative Example 1.

Embodiment 3

[0061] 0.02g of cis-1,3-dimethyl-1,3-diphenylcyclobutane, 9g of by-product inhibitor 3 and 1kg of cumene were added to the reaction kettle, and the rest of the conditions were the same as those of Comparative Example 1.

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Abstract

The present invention relates to a method for preparing cumene hydroperoxide through oxidation of cumene. The method comprises: in the presence of an alpha-methyl styrene dimer, preparing cumene hydroperoxide through oxidation of cumene, wherein preferably the method can be performed in the presence of a by-product inhibitor. According to the present invention, the conversion rate of cumene is improved when the reaction solution contains a certain amount of alpha-methylstyrene dimmers; and after the alpha-methylstyrene dimer and the by-product inhibitor are simultaneously added, the conversionrate of cumene can be increased while the selectivity of methyl phenyl ketone can be effectively reduced.

Description

technical field [0001] The invention relates to a method for liquid-phase oxidation of cumene into cumene hydroperoxide, in particular to a method for controlling by-products in the production process of cumene hydroperoxide Background technique [0002] Cumene hydroperoxide can be prepared by liquid-phase oxidation of cumene with an oxygen-containing gas, such as air. Such oxidation methods are well known in the art. [0003] In such cumene oxidation reactions, dimethyl benzyl alcohol (DMBA) and methyl phenyl ketone (PMK) are formed as by-products. Subsequent oxidation of propylene with the cumene hydroperoxide leads to the production of propylene oxide (PO) and dimethylbenzyl alcohol (DMBA). Dimethyl benzyl alcohol can be converted into cumene by hydrogenolysis reaction with hydrogen and recycled as raw material for oxidation reaction. [0004] In such a method, the production of propylene oxide co-products is avoided, and only propylene oxide products with larger marke...

Claims

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Application Information

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IPC IPC(8): C07C407/00C07C409/10
CPCC07C407/00C07C407/006C07C409/10
Inventor 朱发明刘鹏崔娇英代红涛员玫孙犀璨陈晨乔小飞
Owner WANHUA CHEM GRP CO LTD
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