Abstract: In the preparation of a 2-arylamino-4,6-dichloro-s-triazine of the formula ##STR1## in which R.sup.1 is an optionally substituted aryl radical, andR.sup.2 is hydrogen or alkyl,by reacting cyanuric chloride of the formula ##STR2## with a virtually water-insoluble arylamine of the formula ##STR3## at a temperature between 0.degree. and 100.degree. C., the improvement which comprises effecting the reaction in water at an acid pH in the presence of a virtually water-insoluble organic solvent. The resulting aqueous phase contains the triazine in such high purity and concentration that it can be used without further purification. The organic solvent can be recycled.

Abstract: In the production of thiocarbohydrazide wherein hydrazine is reacted with carbon disulfide in the presence of water and the reaction product is thereafter heated to evolve hydrogen sulfide, the improvement which comprises effecting the reaction with carbon disulfide in the presence of hydrogen sulfide, whereby the yield of thiocarbohydrazide is increased. At the end of the reaction, the thiocarbohydrazide is filtered off and the mother liquor, after a portion is concentrated and still containing hydrogen sulfide as well as excess hydrazine, is recycled to the next cycle as the source of hydrogen sulfide.