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Cumene oxidation method

A cumene and ozone technology, which is applied in chemical instruments and methods, preparation of peroxy compounds, preparation of organic compounds, etc., can solve the problems of large oxidation equipment, greatly increased investment cost, long oxidation time, etc., and can overcome the production process. Sophisticated, highly selective and simple production process results

Active Publication Date: 2015-07-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when cumene is traditionally oxidized, the oxidation time is long and the efficiency is low, resulting in huge oxidation equipment and a large increase in investment costs
And both of these two uses require that the scale must reach a certain level to have economic benefits, thus limiting the development of the process

Method used

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Examples

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Effect test

Embodiment 1

[0020] At a temperature of 60° C. and a pressure of 0.5 MPa, with ozone (15% by volume, the rest being oxygen) as an oxidant, cumene, ozone and solvent acetone were reacted in a molar ratio of 1:1:1. The results of the 2-hour reaction were as follows: the conversion rate of cumene was 39%; the effective utilization rate of ozone was 38%; the selectivity of cumene hydroperoxide was 94% and the selectivity of phenol was 5%.

Embodiment 2

[0022] At a temperature of 20° C. and a pressure of 1.5 MPa, with ozone (30% by volume, the rest being air) as an oxidant, cumene, ozone and solvent acetic acid were reacted in a molar ratio of 1:1:5. The results of the reaction for 5 hours are as follows: the conversion rate of cumene is 47%; the effective utilization rate of ozone is 32%; the selectivity of cumene hydroperoxide is 82% and the selectivity of phenol is 17%.

Embodiment 3

[0024] At a temperature of 80° C. and a pressure of 0.2 MPa, with ozone (5% by volume, the rest being oxygen) as an oxidant, cumene, ozone and solvent acetonitrile were reacted in a molar ratio of 1:2:10. The result of reacting for 1 hour is as follows: the conversion rate of cumene is 28%; the effective utilization rate of ozone is 36%; the selectivity of cumene hydroperoxide is 94% and the selectivity of phenol is 4%.

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Abstract

The invention discloses a cumene oxidation method, which is characterized by adopting of ozone or mixture of ozone and dilution gases as an oxidant, and reaction according to the molar ratio of cumene, ozone and solvent being 1: (0.1-10): (0-150) at the temperature of 0-180 DEG C and under the pressure of 0.1-3.0MPa. By adopting the method, the selectivity of cumene hydroperoxide is high, and the selectivity of phenol can be improved greatly with the presence of a titanium-containing catalyst.

Description

technical field [0001] The present invention relates to a method for cumene oxidation, and more particularly relates to a method for oxidizing cumene with ozone as an oxidant. Background technique [0002] Industrially, cumene oxidation mainly adopts air auto-oxidation process to produce cumene hydroperoxide. At present, cumene hydroperoxide mainly has two kinds of uses: one is to oxidize propylene peroxide to obtain cyclo oxypropane while the peroxide is converted to cumyl alcohol, which is then hydrogenated back to cumene. This is the industrial propylene oxide production process without co-products, also known as the cumene oxidation process, which is one of the main production processes of propylene oxide. The second is that cumene hydroperoxide is directly decomposed into phenol and acetone under certain acid-base conditions, which is the famous phenol-acetone co-production process and is the main preparation method of phenol and acetone at present. [0003] However, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C409/10C07C407/00C07C39/04C07C37/08
CPCY02P20/52
Inventor 朱斌史春风林民汝迎春
Owner CHINA PETROLEUM & CHEM CORP