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Production method for bis-(2-hydroxyl isopropyl)benzene

A technology of hydroxyisopropyl and production method, which is applied in the production field of di-benzene, can solve the problems affecting the oxidation reaction speed, etc., and achieve the effect of increasing the speed and good technical effect

Active Publication Date: 2013-06-19
CHINA PETROCHEMICAL CORP
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Problems solved by technology

[0012] The technical problem to be solved by the present invention is that in the prior art, there is the continuous accumulation of impurity acetyl dimethyl benzyl alcohol in the recycled dicumene, which affects the oxidation reaction speed. A new di-(2-hydroxyisopropylbenzene The production method of propyl) benzene

Method used

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  • Production method for bis-(2-hydroxyl isopropyl)benzene
  • Production method for bis-(2-hydroxyl isopropyl)benzene
  • Production method for bis-(2-hydroxyl isopropyl)benzene

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Embodiment 1～7

[0024] The recycled dicumene stream III containing KC is fully contacted with the sodium hypochlorite solution, and the water phase is excluded after standing for stratification to obtain the dicumyl stream I meeting the requirements. Wherein, the weight percentage concentration of sodium hypochlorite solution is 10%. Contact temperature, contact time, weight ratio of dicumyl benzene stream III to hypochlorite solution, content of KC in dicumyl benzene stream III before treatment, and removal rate are specifically shown in Table 1.

[0025] Table 1

[0026]

Embodiment 8

[0032] The recycled dicumyl benzene from which KC has been removed and treated in [Example 4] is oxidized with air, and then reduced with a reducing agent to obtain bis-(2-hydroxyisopropyl)benzene.

[0033] Wherein, the oxidation reaction temperature is 100° C., the reaction pressure is 0.25 MPa, the reaction time is 24 hours, and the weight ratio of dicumyl to air is 3:1. The reduction reaction temperature is 65° C., the reaction pressure is normal pressure, the reaction time is 6 hours, and the molar ratio of reducing agent to MHP is 4.60:1.

[0034] The initial MHP content was 2%, and after 24 hours of oxidation reaction, the MHP content was 30.31%.

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Abstract

The invention relates to a production method for bis-(2-hydroxyl isopropyl)benzene, and mainly solves the problem that continuous accumulation of impurity of acetyl dimethyl-benzyl alcohol in recycling diisopropylbenzene influences the speed of an oxidation reaction in the prior art. The problem is relatively well solved by a technical solution comprising the following steps of a) contacting a material flow I containing the diisopropylbenzene and air with a catalyst to carry out the oxidation reaction for 10-24 hours under a condition with a reaction temperature of 85-105 DEG C and a reaction pressure of 0.20-0.35 MPa, so as to obtain a material flow II, wherein the weight content of the acetyl dimethyl-benzyl alcohol in the material flow I is smaller than 3%; and b) carrying out a reduction reaction on the material flow II and a reducing agent Na2S for 5-7 hours under the condition with the reaction temperature of 85-105 DEG C and the reaction pressure of 0.20-0.35 MPa, so as to obtain the bis-(2-hydroxyl isopropyl)benzene. The production method can be applied in industrial production of the bis-(2-hydroxyl isopropyl)benzene.

Description

technical field [0001] The invention relates to a production method of bis-(2-hydroxyisopropyl)benzene. Background technique [0002] Di-(2-hydroxyisopropyl)benzene is an important chemical intermediate raw material, referred to as DC, and its molecular formula is C 12 h 18 o 2 , the molecular weight is 194.28. DC is a white needle-like crystalline solid at room temperature, the melting point of the meta-isomer is 134-135°C, and the melting point of the para-position is 140-141°C. The chemical properties of DC are also relatively active. As a tertiary carbon alcohol, DC dehydrates into olefins at a higher temperature (greater than 120°C). DC itself can be polymerized, and can also react with tert-butyl hydroperoxide to generate various organic compounds. Based on these properties of DC, DC is not only a stabilizer biphenol for the synthesis of polyolefins and polyurethanes, but also an important starting material for organic peroxide bis(tert-butylperoxyisopropyl)benzen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C33/26C07C29/132
Inventor 谭永生吴成跃徐裕崔敏华徐卫民潘新民
Owner CHINA PETROCHEMICAL CORP
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