Process for the substitution of chlorine atoms of cyanuric chloride

A process for the successive substitution of two chlorine atoms of cyanuric chloride comprising reacting the cyanuric chloride with two amines in the presence of an acid binding agent and an organic solvent to produce a triazine of the formula ##STR7## where R.sub.1 and R.sub.2 are lower alkyl, lower alkenyl, cyclo lower alkyl or methylcyclopropyl or such groups substituted by --OH, --OR.sub.5, --SR.sub.5 or CN where R.sub.5 is lower alkyl with the proviso that one of R.sub.1 and R.sub.2 can be hydrogen, R.sub.3 is as defined for R.sub.1 or ##STR8## and R.sub.4 is ##STR9## wherein R.sub.6 and R.sub.7 are alkyl or alkenyl of 1 to 8 carbon atoms, or together with the adjoining carbon atom form a 5 to 7 membered cycloalkyl ring or are cycloalkyl with the proviso that one of R.sub.6 and R.sub.7 can be hydrogen, said process comprising adding a first amine of the formula ##STR10## to a 4 to 60 weight % solution or suspension of cyanuric chloride in a mixture of (a) 65 to 85 weight % of a hydrocarbon solvent selected from the group consisting of an aliphatic hydrocarbon having 5 to 10 carbon atoms, a cycloaliphatic hydrocarbon having 5 to 10 carbon atoms or an aromatic hydrocarbon, and (b) 35 to 15 weight % of a ketone having 3 to 8 carbon atoms and then adding a different amine having the formula ##STR11##