METHOD OF OBTAINING ACETONECYANOHYDRIN Russian patent published in 2013 - IPC C07C253/00 C07C255/16 

FIELD: chemistry.

SUBSTANCE: invention relates to method of a obtaining cetone cyanohydrin. According to claimed method reaction mixture, which contains acetone and hydrocyanic acid, are converted in presence of catalyst in loopback reactor with formation of acetone cyanohydrin as reaction product. Loopback reactor has, at least, one device for reaction mixture cooling, at least, one pump, at least, one device for mixing of reaction mixture and, at least, one supplying hole for supply of each hydrocyanic acid, acetone and catalyst, and supply of catalyst is realised down flow of acetone and hydrocyanic acid supply. Invention also relates to method of obtaining acetone cyanohydrin, which additionally contains uninterrupted or periodical extraction of reaction product from loopback reactor, cooling reaction product to temperature from 0 to 10°C and mixing with sulphuric acid with water content from 0.1 to 8 % wt.

EFFECT: method makes it possible to increase output of acetone cyanohydrin.

22 cl, 9 dwg, 2 ex