METHOD OF PRODUCTION OF PHENOLS Russian patent published in 2008 - IPC C07C37/68 C07C37/08 C07C39/04 C07C37/72 

FIELD: chemical industry; methods of production of the phenols by the catalytic decomposition of the cumene hydroperoxide into phenol and acetone.

SUBSTANCE: the invention is pertaining to production of phenols by the catalytic decomposition of the cumene hydroperoxide into phenol and acetone. The method provides for oxidization of the cumene into the cumene hydroperoxide, catalyzed by the acid decomposition of the cumene hydroperoxide, neutralization of the produced product of the decomposition, maintaining the product in the homogeneous phase before neutralization, which is conducted by means of the aqueous base. The phenol is separated by fractionation of the neutralized product. The aqueous base represents the water solution of the sodium hydroxide or phenoxide. In particular use the regenerated phenoxide, at least, on one phase of the treatment at production of the phenol. It is preferential to add the sodium hydroxide water solution to the reaction product in such a concentration and such amount, that to receive the concentration of sodium phenolate in the homogeneous phase from 0.2 up to 2.5 mass %. The temperature of the homogeneous phase after the add-on of the aqueous base is set within the range of 20°С-150°С, the preferable temperature is within the range of 60°С-120°С. It is preferential, that the reaction product is saturated with the oxygen-containing gas. The technical result of the invention is the decreased quantity of the undesirable impurities in the products of the acid decomposition of the cumene hydroperoxide.

EFFECT: the invention ensures the decreased quantity of the undesirable impurities in the products of the acid decomposition of the cumene hydroperoxide.

13 cl, 4 ex