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Method for improving stability of ethylbenzene hydroperoxide

A technology of ethylbenzene hydroperoxide and stability, applied in the direction of preparation of peroxygen compounds, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as unproposed solutions, reduce scaling problems, and improve selection The effect of sex and productivity and difficulty reduction

Inactive Publication Date: 2019-01-11
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the relevant problems in the prior art, no effective solution has been proposed yet

Method used

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  • Method for improving stability of ethylbenzene hydroperoxide
  • Method for improving stability of ethylbenzene hydroperoxide
  • Method for improving stability of ethylbenzene hydroperoxide

Examples

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Embodiment 1

[0055] A method for improving the stability of ethylbenzene hydroperoxide, comprising the steps:

[0056] In three identical bubble tower oxidation reactor devices, ethylbenzene and succinic acid derivatives are mixed by a mixer and then enter the first oxidation reactor, nitrogen and oxygen mixed gas containing 23v% oxygen flow from the reactor The bottom enters and reacts, wherein the general formula of the succinic acid derivative used is as follows:

[0057]

[0058] Among them, R 1 is ethyl, R 2 is ethyl, R 3 is n-propyl, R 4 is n-propyl, R5 is n-butyl, R 6 For n-butyl. In the first oxidation reactor, the feed rate of ethylbenzene is 1kg / h, the content of succinic acid derivatives in the ethylbenzene feed is controlled to be 70mg / kg, the reaction temperature is 156°C, the reaction pressure is 0.20MPa, and the residence time of the reaction liquid phase is After 45min, enter the second reactor, the reaction temperature is 154°C, the reaction pressure is 0.20MPa, t...

Embodiment 2

[0060] A method for improving the stability of ethylbenzene hydroperoxide, comprising the steps:

[0061] Experiments were carried out in four identical bubble tower oxidation reactor devices. After ethylbenzene and succinic acid derivatives were mixed through a mixer, they entered the first oxidation reactor, and nitrogen and oxygen mixed gas containing 23v% oxygen were fed from The bottom of the reactor enters and reacts, wherein the general formula of the succinic acid derivative used is as follows:

[0062]

[0063] Among them, R 1 is methyl, R 2 is methyl, R 3 for hydrogen, R 4 for hydrogen, R 5 is n-butyl, R 6 For n-butyl. In the first oxidation reactor, the amount of ethylbenzene feed is 1kg / h, the content of succinic acid derivatives in the ethylbenzene feed is controlled to be 85mg / kg, the reaction temperature is 160°C, the reaction pressure is 0.20MPa, and the reaction liquid phase stays The time is 40min, then enter the second reactor, the reaction tempera...

Embodiment 3

[0065] A method for improving the stability of ethylbenzene hydroperoxide, comprising the steps:

[0066] Tests were carried out in three identical bubble tower oxidation reactor devices. After ethylbenzene and malonic acid derivatives were mixed through a mixer, they entered the first oxidation reactor, and nitrogen and oxygen mixed gas containing 23v% oxygen were fed from The bottom of the reactor enters and reacts, wherein the general formula of the malonic acid derivative used is as follows:

[0067]

[0068] Among them, R 7 is n-butyl, R 8 is n-butyl, R 9 is methyl, R 10 For methyl. In the first oxidation reactor, the feed amount of ethylbenzene is 1kg / h, the malonic acid derivative content in the ethylbenzene feed is controlled to be 65mg / kg, the reaction temperature is 162°C, the reaction pressure is 0.20MPa, and the reaction liquid phase stays Time is 45min, then enters the second reactor, the reaction temperature is 161°C, the reaction pressure is 0.20MPa, the...

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Abstract

The invention discloses a method for improving the stability of ethylbenzene hydroperoxide. The method includes the step of addition of malonic acid derivatives and / or succinic acid derivatives duringthe preparation of ethylbenzene hydroperoxide. The method can effectively inhibit decomposition of ethylbenzene hydroperoxide produced by oxidation, is especially suitable for an SMPO process, and isbeneficial to improvement of the stability of the intermediate ethylbenzene hydroperoxide in the process. The method cannot introduce metal cationic sodium or potassium and the like, can reduce scaling problems caused by material entrainment and the like, reduces discharge of phosphorus-containing wastewater, has good environmental protection, and improves the selectivity and yield of the reaction.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a method for improving the stability of ethylbenzene hydroperoxide. Background technique [0002] Ethylbenzene hydroperoxide is an intermediate in the joint production process of propylene oxide and styrene. The joint production process of propylene oxide and styrene is called SMPO process for short. The characteristic of SMPO co-production method is that it does not require high temperature reaction and can be combined simultaneously. It produces two important organic chemical products, styrene and propylene oxide. The oxidation of ethylbenzene to generate ethylbenzene hydroperoxide is a key step in the SMPO process. Halcon successfully developed it and first introduced it in US patents US3459810 and US3475498. It was first industrialized in Spain in 1973. At present, the manufacturers in the world who have the patent transfer right of this law mainly include Lyondell Comp...

Claims

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Application Information

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IPC IPC(8): C07C407/00C07C409/02
CPCC07C407/006C07C409/02
Inventor 傅送保王凯王兴永侯章贵
Owner CHINA NAT OFFSHORE OIL CORP
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