METHOD OF PRODUCING ACETONE CYANOHYDRIN AND DERIVATIVE PRODUCTS THEREOF BY TARGETED COOLING Russian patent published in 2013 - IPC C07C253/00 C07C253/08 C07C255/16 C07C57/04 C07C57/65 C07C67/20 C07C69/54 C07C231/06 C07C233/09 B01J19/18 C08F20/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing acetone cyanohydrin. The method involves step A) of reacting acetone and a strong acid in the presence of a base catalyst in a reactor to obtain a reaction mixture, wherein the reaction mixture circulates, and acetone cyanohydrin is obtained; B) cooling at least 70 wt % of the reaction mixture by flowing in the cooling region of a cooler with dwell time in the cooler of 0.1-2 hours, wherein the cooler contains one cooling element or at least two cooling elements; C) removing at least a portion of the obtained acetone cyanohydrin from the reactor. In terms of the total internal volume of the cooler, the volume of the cooling region of the cooler is larger than the volume of the cooling element or at least two cooling elements of the cooler. The invention also relates to methods of producing an alkyl ester of methacrylic acid and methacrylic acid, which includes as one of the steps, production of acetone cyanohydrin using the disclosed method, as well as an apparatus for producing alkyl esters of methacrylic acid and use thereof.

EFFECT: method increases output of acetone cyanohydrin.

19 cl, 8 dwg, 1 tbl, 4 ex