Diisopropylbenzene dihydroperoxide

Commercially, autoxidation is used in the production of a-cumyl hydroperoxide, tert-huty hydroperoxide, -diisopropylbenzene monohydroperoxide, -diisopropylbenzene dihydroperoxide, -menthane hydroperoxide, pinane hydroperoxide, and ethylbenzene hydroperoxide. 

Both reactions take place in liquid solution. If one desires to carry out these reactions in a continuous stirred tank reactor, determine the space time corresponding to a maximum yield of p-hydroxycumyl hydroperoxide. If the initial p-diisopropylbenzene dihydroperoxide concentration is 10 moles/m3, what are the concentrations of the various species in the effluent ... 

More important is the transformation of benzene to 1,3-benzenedisulfonic acid utilized in the manufacture of resorcinol.97 According to an older method benzene is sulfonated in two steps first by 100% sulfuric acid at 100°C, and then by 65% oleum at 80-85°C. The Hoechst new continuous one-step process applies sulfur trioxide at 140-160°C in molten 1,3-benzenedisulfonic acid. m-Diisopropylbenzene, via its dihydroperoxide is, however, displacing this process. 

Treatment of p-cymene, p-methylisopropylbenzene, by the peroxidation-decomposition process yields p-cresol and acetone. Starting with diisopropylbenzene, either the mono- or dihydroperoxide may Be obtained and from these a variety of products including isopropylphenol, isopropylace-tophenone, hydroquinone, diacetylbenzene, and others, depending- on the decomposition technique. 

Numerous autoxidation products (e.g., 1,3- and 1,4-dihydroxybenzene, 1,3- and l,4-di-[l-methylethyl]benzene dihydroperoxide, 1-methyl-1-phenylethanol) were separated from their 1,3- and 1,4-diisopropylbenzene parent compounds on a silica column (2 = 257 nm) with a 98/2 hexane/IPA mobile phase [610]. Each set of compounds (i.e., the 1,3 vs. the 1,4) was studied separately. Lower limits of... 

Sumitomo of Japan has developed a commercially alternative process that avoids the use of sulfuric acid and the concomitant undesired salt formation (see reaction sequence below). This alternative route is analogous to the cumene process for phenol production. Diisopropylbenzene (m-DIPB) can be manufactured by the catalytic dialkylation of benzene with two equivalents of propylene. The resulting m-DIPB is then catalytically hydroperoxidized to the corresponding dihydroperoxide (DHP). Upon acidification the dihydroperoxide (DHP) is cleaved cleanly to give resorcinol and acetone. It is worth noting that the Sumitomo process not only provides a cleaner alternative route for the production of resorcinol,... 

This alternative route is similar to the process for resorcinol production, the only difference being the use of the respective diisopropylbenzene (DIPB) isomers. Hydroquinone or resorcinol is produced from p-DBPB or m-DlPB, respectively, according to the dihydroperoxide reaction. In other words, hydroquinone and resorcinol can be produced alternatively in the same manufacturing plant when the reaction processes are designed for alternatively producing the m- and p-DIPB isomers. In addition, diisopropylbenzenes (DIPBs) are by-products from the process of cumene production in phenol manufacture. 

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