METHOD OF PRODUCTION OF THE CHLOROFORM Russian patent published in 2008 - IPC C07C19/04 C07C17/10 

FIELD: chemical industry; methods of production of the chloroform.

SUBSTANCE: the invention is pertaining to the method of production of the chloroform by chlorination of methylene chloride in the liquid phase at the temperature of 35-50°С at photoinitiation with the subsequent separation of the chloroform by rectification. At that before the chlorination methylene chloride is saturated with chlorine, and for chlorination feed the solution of chlorine in methylene chloride. The methylene chloride is saturated in the darkness, the saturation is conducted by the electrolysis chlorine with separation of the volatile components - hydrogen, nitrogen, oxygen present in the electrolysis chlorine, from the solution of the chlorine in methylene chloride at the temperature being within the limits from minus 10 up to plus 5°С, in the counter-currentmode at sprinkling of the absorption column by the cooled methylene chloride or in the bubbling mode in the conditions of bubbling by the electrolysis chlorine through the cooled methylene chloride. The technical result of the invention is suppression of the inhibition of the process of chlorination of the methylene chloride at usage of the electrolysis chlorine, the increase of conversion of chlorine and selectivity for chloroform.

EFFECT: the invention ensures suppression of the inhibition of the chlorination process of methylene chloride at usage of the electrolysis chlorine, the increased conversion of chlorine and selectivity for chloroform.

5 cl, 4 ex, 1 tbl