Process for the preparation of thiazolidine-2-thiones

Details Process for the preparation of thiazolidine-2-thiones Process for the preparation of thiazolidine-2-thiones

C - Chemistry, Metallurgy

07

D

260/308.5, 260/3

C07D 277/16 (2006.01)

Patent

CA 1137490

ABSTRACT OF THE DISCLOSURE A process for the production of thiazolidine-2- thiones by the reaction of 1 mol of an amino ethanol with from 2 to 2.1 mol of carbon disulphide at from 20 to 200°C and from 0.1 to 5 bar pressure, characterised in that the liquid phase containing amino ethanol is brought into intimate contact with the gaseous phase containing carbon disulphide in a continuous single stage process in at least two consecutive reaction zones, wherein the liquid phase is introduced continuously into the first reaction zone, conveyed toward the last reaction zone and removed downstream of the last reaction zone and wherein the gaseous phase is introduced continuously into the last reaction zone, conveyed toward the first reaction zone and removed downstream of the first reaction zone. The product obtained can be used as a vulcanisation accelerator for rubber.

348095

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