Bayer Aktiengesellschaft

Dieter Hullstrung

Wolfgang Harms

Rolf Germerdonk

Adam Jonas

Bernhard Scherhag

Jurgen Trimbach

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.degree. to 200.degree. C. and from 0.1 to 5 bar pressure, characterized 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 in 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 vulcanization accelerator for rubber.

Process for the preparation of thiazolidine-2-thiones

The dyestuff of the formula ##STR1## is suitable for the dyeing of nitrogen-containing textile materials with good fastness properties.

Water-soluble anthraquinone dyestuff

Hydrogen sulfide in a gas is converted to sulfur by treatment with sulfur dioxide in the presence of a buffered organic polybasic acid with conversion of excess sulfur compounds in the gas to sulfur dioxide for recycle to the conversion.

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Leverkusen, Germany

Dieter Hullstrung