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Method for treating products of alkylbenzene hydroperoxide decomposition reaction

A hydrogen peroxide and alkylbenzene technology, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carbonyl compounds, etc., to achieve the effect of increasing yield and reducing hydrogenation reaction

Inactive Publication Date: 2011-08-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these technologies achieve the conversion of three phenol / acetone process by-products, namely, acetophenone, α-methylstyrene and dimethyl benzyl alcohol, in the same process to reduce the load of the subsequent separation process

Method used

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  • Method for treating products of alkylbenzene hydroperoxide decomposition reaction
  • Method for treating products of alkylbenzene hydroperoxide decomposition reaction
  • Method for treating products of alkylbenzene hydroperoxide decomposition reaction

Examples

Experimental program
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Effect test

Embodiment 1

[0014] The decomposition solution containing the composition shown in Table 1 is injected into the first hydrogenation reactor, wherein nickel-cerium-Al is filled 2 o 3 Catalyst, at 60 ℃, under normal pressure condition, carry out hydrogenation treatment, obtain the content of product AMS and drop to 0.5%, then enter the second hydrogenation reactor, wherein packing palladium carbon catalyst (palladium content is 10wt%), temperature is 200 ℃, the hydrogen pressure rises to 0.5MPa, dimethyl benzyl alcohol and the remaining AMS are converted into cumene, and acetophenone is converted into ethylbenzene. During the hydrogenation process, hydrogenation of the benzene ring cannot occur, and the product mainly contains phenol , acetone, cumene and ethylbenzene, as well as high-boiling impurities, easy to separate.

[0015] Table 1:

[0016]

Embodiment 2

[0018] The decomposition solution containing the composition shown in Table 2 is injected into the first hydrogenation reactor, wherein nickel-cerium-Al is filled 2 o 3 Catalyst, at 70 ℃, carry out hydrogenation treatment under normal pressure condition, obtain the content of product AMS and drop to 0.4%, then enter the second hydrogenation reactor, wherein packing palladium carbon catalyst (palladium content is 10wt%), temperature is 200 ℃, the hydrogen pressure rises to 1.0MPa, dimethyl benzyl alcohol and the remaining AMS are converted into cumene, and acetophenone is converted into ethylbenzene. During the hydrogenation process, hydrogenation of the benzene ring cannot occur, and the product mainly contains phenol , acetone, cumene and ethylbenzene, as well as high-boiling impurities, easy to separate.

[0019] Table 2

[0020]

Embodiment 3

[0022] The decomposition solution containing the composition shown in Table 3 is injected into the first hydrogenation reactor, wherein nickel-cerium-Al is filled 2 o 3 Catalyst, at 70 ℃, under normal pressure condition, carry out hydrogenation treatment, obtain the content of product AES and drop to 0.5%, then enter the second hydrogenation reactor, wherein packing palladium carbon catalyst (palladium content is 10wt%), temperature is 200 ℃, the hydrogen pressure rises to 1.0MPa, methyl ethyl benzyl alcohol and the remaining AES are converted into sec-butylbenzene, and acetophenone is converted into ethylbenzene. During the hydrogenation process, hydrogenation of the benzene ring cannot occur, and the main product is Contains phenol, methyl ethyl ketone, sec-butylbenzene and ethylbenzene, as well as high boiling impurities, easy to separate.

[0023] table 3

[0024] Component wt%

[0025] Acetophenone

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Abstract

The invention discloses a method for treating products of the alkylbenzene hydroperoxide decomposition reaction, belongings to the technical field of alkylbenzene hydroperoxide decomposition. The method comprises the following steps: adding decomposition liquid firstly to a first hydrogenation reactor with nickel-cerium-loaded hydrogenation catalyst, hydrogenating alpha-methyl styrene or alpha-ethyl styrene at 60-70 DEG C and constant atmospheric pressure to ensure that the weight content is reduced to the range from 0.4% to 0.5%; then enabling the obtained material to enter a second reactor,increasing temperature to 200 DEG C and increasing pressure to 0.5-1.0 MPa, continuously converting the rest of alpha-methyl styrene or alpha-ethyl styrene into isopropylbenzene or sec-butylbenzene and converting dimethyl benzyl alcohol or methyl ethyl benzyl alcohol, and acetyl benzene into isopropylbenzene or sec-butylbenzene, and ethylbenzene synchronously, wherein the catalyst is a palladium-loaded hydrogenation catalyst with higher activity. By adopting the treatment method, three phenol / acetone technological by-products can be converted in one process step and the load of the subsequentseparation process can be reduced.

Description

technical field [0001] The invention relates to a method for processing alkylbenzene hydroperoxide decomposition reaction products. Through hydrogenation treatment, the impurities in the decomposition liquid are converted into substances that are easy to separate, and the load of the subsequent separation section is reduced, which belongs to the decomposition of alkylbenzene hydroperoxide. technology field. Background technique [0002] The method of producing phenol and acetone in the chemical industry is the oxidation-decomposition process of cumene. The cumene is first oxidized into cumene hydroperoxide (CHP) in the air, and then the oxidized solution containing CHP is concentrated and separated from large After part of the cumene, it decomposes in the presence of an acidic catalyst to generate phenol and acetone, and simultaneously produces α-methylstyrene (AMS), acetophenone, and dimethyl benzyl alcohol by-products. The decomposition products are called decomposition li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/04C07C37/86C07C49/08C07C45/85
CPCY02P20/52
Inventor 陈标华张傑李红坤黄崇品李英霞
Owner BEIJING UNIV OF CHEM TECH
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