METHOD OF DECOMPOSING CUMENE HYDROPEROXIDE WITH ACID CATALYST TO PHENOL AND ACETONE Russian patent published in 2011 - IPC C07C37/08 C07C45/53 C07C39/04 C07C49/08 C07C27/00 C07C15/46 C07C1/20 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of decomposing cumene hydroperoxide with an acid catalyst to phenol and acetone in the system of a hollow reactor with back-mixing and swirling motion of reaction products, cooling the decomposition reaction mass in a cooling heat exchanger, using a catalyst system in form of 0.3-0.5 wt % solution of sulphuric acid in acetone, while feeding the catalyst into suction line of a circulating pump in the medium of the reaction mass, regulation of residual content of hydroperoxide at the end of the back-mixing cycle using a "control decomposition tube", in which a small portion of the reaction mass is mixed with the whole amount of the acid catalyst fed into the decomposition system, decomposition of the reaction products output from the back-mixing system by heating, holding in a structured flow apparatus and stepwise reduction of acidity in said apparatus by feeding water at the end of the first quarter of the length of the apparatus and fast cooling of the reaction mixture at the output of the structured flow apparatus. The volume of the hollow reactor in the back-mixing system is equal to or greater than the volume of the inter-tube space of the cooling heat exchanger of the reaction mass, wherein a constant amount of a portion of the acid catalyst per constant amount of the reaction mass is fed into the "control decomposition tube", the remaining portion of the catalyst through the flow regulator from the temperature difference at the ends of the "control decomposition tube" is directly fed into the suction line of the circulating pump, and mixing the decomposition reaction mass with the acid catalyst at the input of the tube with structural length in order to reduce the distance from the point of contact of the decomposition reaction mass with the catalyst to the first thermocouple of the "control decomposition tube".

EFFECT: invention enables to conduct a high-selectivity process for decomposition of cumene hydroproxide.

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