METHOD OF PRODUCING PARA-TERT-BUTYLPHENOL AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2013 - IPC C07C37/74 C07C39/06 B01D3/16 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of producing para-tert-butylphenol by alkylation of phenol with isobutylene on a heterogeneous sulphocationite catalyst, separating the reaction mass containing phenol, para-tert-butylphenol, ortho-tert-butylphenol, 2,4-di-tert-butylphenol and high-boiling impurities by vacuum rectification in two columns with collection of phenol and ortho-tert-butylphenol in distillate form. The reaction mass is subjected to rotory-film evaporation to separate high-boiling impurities therefrom; the commercial product is separated in an additional rectification column in distillate form; absorption trapping of uncondensed para-tert-butylphenol vapour is carried out on a vacuum line; the bottom residue of the commercial product separating column, which contains 2,4-di-tert-butylphenol and para-tert-butylphenol, is recycled to the step for alkylating phenol with isobutylene. The invention also relates to an apparatus for realising the method of producing para-tert-butylphenol.

EFFECT: method enables to obtain a product with high purity and high output.

2 cl, 1 dwg