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Di-(2-hydroxyl isopropyl) benzene production method

A technology for the production of hydroxyisopropyl, which is applied in the field of di-benzene production, can solve the problems of long process flow and high consumption of public works, and achieve the effects of simplifying the process flow, reducing consumption, and good technical effects

Active Publication Date: 2013-02-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the prior art has the problems of long process flow and high consumption of public works, and a new production method of bis-(2-hydroxyisopropyl)benzene is provided

Method used

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  • Di-(2-hydroxyl isopropyl) benzene production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] use figure 1 In the process shown, the stream 8 containing bis-(isopropylhydroperoxide)benzene and the reducing agent 7 enter the reduction reactor 1, where the bis-(isopropylhydroperoxide)benzene and the reducing agent are generated Reducing reaction to obtain stream I. Stream I enters the first crystallization zone 2 and obtains stream III after crystallization. The stream III enters the first separation zone 4, and after centrifugal separation, the first mother liquor 10 and the stream IV are obtained. The stream IV and the solvent 6 enter the second crystallization zone 3, and the stream II is obtained after crystallization. The stream II enters the second separation zone 5, after centrifugal separation, the second mother liquor 11 and the product di-(2-hydroxyisopropyl)benzene 9 are obtained; the first mother liquor 10 and the second mother liquor 11 enter the subsequent process.

[0018] The stream containing bis-(cumyl hydroperoxide) benzene is a dicumyl benzene ...

Embodiment 2

[0022] Same as [Example 1], except that the reducing agent is potassium sulfide, and the weight ratio of bis-(isopropylhydroperoxide)benzene to potassium sulfide is 10:8.

[0023] The purity of the product di-(2-hydroxyisopropyl)benzene 9 is 85.1% by weight.

[0024] The consumption of public works is 39 tons / ton DC of chilled water, 275 tons / ton DC of circulating water, 3.0 tons / ton DC of steam, and 365kWh / ton DC of electricity.

Embodiment 3

[0026] Same as [Example 1], except that in the reduction reactor, the reaction temperature is 120°C and the reaction pressure is 0.7 MPa. The operating pressure of the first crystallization zone is 0.5MPa, and the operating temperature is 60°C. The operating pressure of the second crystallization zone is 0.45MPaG, and the operating temperature is 60℃

[0027] The purity of the product di-(2-hydroxyisopropyl)benzene 9 is 85.1% by weight.

[0028] The consumption of public works is: chilled water consumption is 41 tons / ton DC, circulating water consumption is 287 tons / ton DC, steam consumption is 3.2 tons / ton DC, and electricity consumption is 388kWh / ton DC.

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Abstract

The invention relates to a di-(2-hydroxyl isopropyl) benzene production method which mainly solves the problems of long technical process and excessive public project consumption in the prior art. The technical scheme for better solving the problems includes that the method includes the steps: 1) allowing reducing agent and material flow containing di-(hydrogen peroxide isopropyl) benzene to enter a reduction reactor, and obtaining material flow I by means of reduction reaction of the di-(hydrogen peroxide isopropyl) benzene and the reducing agent in the reduction reactor; 2) allowing the material flow I and solvent to enter a crystalline region to obtain material flow II after crystallization; and 3) allowing the material flow II to enter a separation region to obtain the di-(2-hydroxyl isopropyl) benzene after separation. The di-(2-hydroxyl isopropyl) benzene production method can be used for industrial production of di-(2-hydroxyl isopropyl) benzene.

Description

Technical field [0001] The invention relates to a production method of bis-(2-hydroxyisopropyl)benzene. Background technique [0002] Bis-(2-hydroxyisopropyl)benzene (DC) is an intermediate product for the production of bis-(tert-butylperoxyisopropyl)benzene (BIPB). The document US7557252 "Process for Producing Dihydroxybenzene and Diisopropylbenzenedicarbinol" discloses the use of bis-(isopropylhydroperoxide)benzene (DHP)-containing dicumylbenzene oxidation solution as a raw material to extract bis-( Hydroperoxide isopropyl)benzene, then undergoes decomposition reaction, then undergoes hydrogenation reduction reaction, and finally crystallizes in methyl isobutyl ketone to obtain bis-(2-hydroxyisopropyl)benzene. [0003] However, the process of preparing bis-(2-hydroxyisopropyl)benzene in the above-mentioned literature adopts four unit operation steps of extraction, decomposition, reduction, and crystallization, which has the problems of long process flow and high consumption of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C33/26C07C29/132
Inventor 杨建平陈柯达郑晓栋陈泱黄智浩
Owner CHINA PETROLEUM & CHEM CORP
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