The method for removing acetyl dimethyl benzyl alcohol in dicumyl
A technology of acetyl dimethyl benzyl alcohol and diisopropyl benzene is applied in the field of removing acetyl dimethyl benzyl alcohol in dicumyl benzene, can solve the problems of low KC removal rate and the like, and achieve the effect of good technical effect
Active Publication Date: 2015-12-16
CHINA PETROCHEMICAL CORP
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Problems solved by technology
[0012] The technical problem to be solved by the present invention is that there is a low removal rate of impurity acetyl dimethyl benzyl alcohol KC in the reused dicumene in the prior art. dimethyl benzyl alcohol method
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[0020] The dicumyl benzene stream I containing acetyl dimethyl benzyl alcohol KC is fully contacted with the sodium hypochlorite solution, and the water phase is excluded after standing for stratification to obtain the dicumyl benzene stream II meeting the requirements. Wherein, the weight percentage concentration of sodium hypochlorite solution is 10%. Contact temperature, contact time, the weight ratio of dicumyl benzene flow I and hypochlorite solution, the content of acetyl dimethyl benzyl alcohol in the dicumene flow I before processing, and removal rate are specifically shown in Table 1.
[0021] Table 1
[0022]
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The invention relates to a method for removing acetyl dimethyl-benzyl alcohol from diisopropylbenzene, and mainly solves the problem of low removal rate of impurity acetyl dimethyl-benzyl alcohol in diisopropylbenzene in the prior art. The problem is relatively well solved by a technical solution comprising the steps of fully contacting a diisopropylbenzene material flow I containing the acetyl dimethyl-benzyl alcohol with a hypochlorite solution at a temperature of 20-60 DEG C, standing, removing a water phase after stratification to obtain a diisopropylbenzene material flow II, wherein the weight content of the acetyl dimethyl-benzyl alcohol in the material flow I is smaller than 3%; a weight percentage concentration of the hypochlorite solution is 5-20%; and a weight ratio of the diisopropylbenzene material flow I to the hypochlorite solution is 1 : (0.8-1.5). The method can be applied in industrial production for removing acetyl dimethyl-benzyl alcohol from reused diisopropylbenzene.
Description
technical field [0001] The invention relates to a method for removing acetyl dimethyl benzyl alcohol in dicumyl 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-butylperox...
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IPC IPC(8): C07C15/02C07C7/148
Inventor 谭永生崔敏华吴成跃徐裕徐卫民潘新民
Owner CHINA PETROCHEMICAL CORP