721-26-6Relevant articles and documents
PROCESS FOR PRODUCTION OF DIALKYLHYDROPEROXYBENZENES
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Page/Page column 4-5, (2008/12/08)
To provide a method for producing dialkylhydroperoxybenzene by liquid-phase oxidation of dialkylbenzene, wherein the method comprises the following steps, Oxidation step: a step of obtaining a oxidation reaction liquid having pH of 9 to 12, which contains dialkylhydroperoxybenzene, unreacted dialkylbenzene, and by-produced hydroperoxybenzenes by subjecting an oxidation raw material solution containing dialkylbenzene to oxidation reaction, Aqueous solution extracting step: a step of extracting the oxidation reaction liquid with an alkaline aqueous solution to obtain a water layer mainly containing dialkylhydroperoxybenzene and by-produced hydroperoxybenzenes, and an oil layer mainly containing dialkylbenzene, and Recycle step: a step of recycling and feeding at least a part of the oil layer obtained in the aqueous solution extracting step to the oxidation step, wherein the oxidation step comprises two or more reaction sections of a first section and subsequent sections arranged in series, and the temperature of the first reaction section is set to be higher than an average temperature of the whole reaction sections by 2.5°C or more.
PROCESS FOR PRODUCING PHENOLS
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Page/Page column 2-3, (2008/06/13)
A process for producing a phenol, which comprises the following steps of: (1) oxidizing an alkylbenzene with an oxygen-containing gas to obtain an oxidation reaction mixture containing a hydroperoxide;(2) subjecting the oxidation reaction mixture to extraction operation with an alkaline aqueous solution to obtain an extract containing the hydroperoxide;(3) subjecting the extract obtained in the step (2) to extraction operation with an organic solvent to obtain an extract containing the hydroperoxide;(4) subjecting the extract obtained in the step (3) to water washing to obtain an oil layer containing the hydroperoxide, in which a content of the alkali has been reduced; and(5) subjecting the hydroperoxide contained in the oil layer obtained in the water washing step (4) to acidolysis to obtain a phenol,wherein a concentration of the hydroperoxide to be subjected to the water washing in the step (4), is 20% by weight or less.
Process for the production of a dihydroxybenzene and dicarbinol from diisopropylbenzene
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Example 2, (2008/06/13)
Improved methods for the simultaneous production of dihydroxybenzene and dicarbinol from diisopropylbenzene are provided. These methods provide for continuous and simultaneous production of diisopropylbenzene dihydroperoxide (DHP) and diisopropylbenzene hydroxyhydroperoxide (HHP) using Karr Column extractors operated in series. A very high purity DHP-containing solution, the precursor to the dihydroxybenzene, can be produced according to the reported methods. A safe and efficient method for producing dicarbinol from HHP is also disclosed.