METHOD OF METHYL METHACRYLATE PURIFICATION Russian patent published in 2014 - IPC C07C67/60 C07C43/303 C07C47/04 C07C69/54 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of methyl methacrylate (MMA) purification, which includes realisation of contact of a liquid MMA, containing admixtures, with a sulphonic acid resin in the presence of formaldehyde or an acceptable source of methylene or ethylene of formula I, as is determined below, where R⁵ and R⁶ are independently selected from C₁-C₁₂ hydrocarbons or H; X represents O; n is an integer number from 1 to 100; and m has a value of 1 or 2, and in which the sulphonic acid resin is optionally, at least, partially, deactivated.

EFFECT: method makes it possible to remove admixtures of an aldehyde type, dienes, trienes with high efficiency.

18 cl, 20 tbl, 1 dwg, 8 ex