Process for the continuous reaction of difluorotriazinyl compounds with amines

A process for the preparation of a compound of the formula ##STR28## in which X and Y each independently is i) ##STR29## in which R.sub.3 is a hydrogen atom or an optionally substituted C.sub.1 -C.sub.4 aliphatic radical and

• R.sub.4 is a hydrogen atom, optionally substituted C.sub.1 -C.sub.4 aliphatic radical or C.sub.1 -C.sub.4 alkoxy group, cyano or an amino group, at least one of R.sub.3 and R.sub.4 not being hydrogen and carrying as a substituent at least one member selected from the group consisting of acetylamino, hydroxyl, sulphato, .beta.-sulphatoethyl-sulphonyl, O--(CH.sub.2).sub.2 --SO.sub.2 --CH.dbd.CH.sub.2, .beta.-thiosulphatoethyl-sulphonyl, lower alkoxy, sulpho, carboxyl, phenyl, naphthyl or phenyl substituted by sulpho, carboxyl, .beta.-sulphatoethylsulphonyl, .beta.-thiosulphatoethylsulphonyl, methyl, ethyl, methoxy, ethoxy, chlorine, sulphamoyl and carbamoyl, or
• ii) ##STR30## in which R.sub.3 and R.sub.4, together with the nitrogen atom, form a morpholine, piperidine or piperazine ring, or
• iii) an amine radical of the formula ##STR31## in which R.sub.1 is H or C.sub.1 -C.sub.4 -alkyl optionally substituted by OR, OSO.sub.3 H, SO.sub.3 H, COOR or halogen,
• R is H, CH.sub.3 or C.sub.2 H.sub.5, and Z is H, R, OH, Cl, OR, NH-acyl, NHR, SO.sub.2 --CH.dbd.CH.sub.2, SO.sub.2 --CH.sub.2 --CH.sub.2 --OSO.sub.3 H, SO.sub.2 --CH.sub.2 --CH.sub.2 --Cl, CONH(CH.sub.2).sub.2 O(CH.sub.2).sub.2 --SO.sub.2 --CH.dbd.CH.sub.2 or O-acyl, or
• iv) a chromophore-containing amine, which comprises continuously reacting a difluorotriazinyl compound of the formula ##STR32## in an aqueous or aqueous/organic solution or in suspension, with an amine of the formula
• Y--H
• the starting materials being passed simultaneously and continuously into a
• 1) reactor at different velocities and achieving intensive mixing by means of the difference in flow velocities, or
• 2) rotor/stator mixer and achieving highly intensive mixing therein in a short period of time as a result of the high rotary speed and the small reaction volume,
• the reaction being carried out with substantially no backmixing.