METHOD OF PRODUCING 4-TERT-BUTYL-PYROCATECHOL AND CATALYST FOR ITS PRODUCTION Russian patent published in 2017 - IPC C07C37/60 C07C39/08 B01J29/89 B01J21/06 B01J21/08 B01J37/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing 4-tert-butyl pyrocatechol, which is widely used as an inhibitor of the polymerization of diene hydrocarbons, stabilizers of unsaturated aldehydes, polymeric materials, ethylcellulose artificial resins, antioxidants of oils, waxes and animal fats, insecticidal compounds, as well as in various fields of experimental biology, as well as to the catalyst used in this method. The method consists in the selective oxidation of 4-tert-butylphenol with aqueous solutions of H₂O₂ in the presence of a titanosilicate catalyst. Herewith Ti is used as a catalyst in an amount of 1.0 wt % deposited on the mesoporous carrier SiO₂ produced by impregnating the carrier with a benzene solution of Ti(OC₂H₅)₄, followed by drying in air at room temperature, treating with aqueous ammonia, drying at 120°C/4 hours and calcining at 550°C/4 hours, and the reaction is carried out in the presence of 2-10% (per reaction mass) of the catalyst in acetonitrile with a starting concentration of 4-tert-butylphenol 2.0 mol/l at a molar ratio of 4-tert-butylphenol: H₂O₂=1÷2:1 and a temperature of 30-50°C.

EFFECT: improved method.

2 cl, 1 tbl, 9 ex