METHOD OF PRODUCING ALKYL METHACRYLATES Russian patent published in 2013 - IPC C07C67/03 C07C69/54 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering and specifically to an improved method of producing alkyl methacrylates via transesterification of methyl methacrylate with alcohols of general formula C_nH_2n+1OH, where n≥4, in the presence of potassium or sodium carbonate and sodium borohydride, as well as a radical polymerisation inhibitor with distillation of the formed methanol in form of an azeotrope with methyl methacrylate, wherein the potassium or sodium carbonate in amount of 0.5-1.5 wt % of the total weight of the reactants used is used as a catalyst until achieving alcohol conversion of 40-80%, after which sodium borohydride is added to the reaction mass in amount of 0.005-0.05 wt % of the amount of alcohols used.

EFFECT: fewer steps, high efficiency of the process, high quality of the commercial-grade alkyl methacrylate.

1 dwg, 6 ex