Bayer Aktiengesellschaft

Hans-Georg Frosch

Wolfgang Mullers

Manfred Hoppe

Frank-Michael Stohr

Richard Sommer

Siegbert Arnold

Hermann Henk

Wolfram Reddig

Herbert Stutz

Karl J Herd

Peter Fuhrmann

Eckart Waldau

Heinrich Grave

The yield and purity of the condensate obtained in the reaction of cyanuric fluoride with an aqueous amine solution is improved by introducing the reactants into a reactor (1) at a differential rate which results in intensive mixing and substantially completing the reaction in the reactor (1) with no back-mixing, the reactor (1) preferably being a tube (1) into which one nozzle (2) opens axially and one or more nozzle(s) (4) open(s) concentrically thereto.

Process for the continuous reaction of cyanuric fluoride with amines and

A process for the continuous reaction of halogenopyrimidines with amines, a halogenopyrimidine and an aqueous amine solution or suspension being passed into a reactor and the reaction product being subsequently conducted away, is described, characterized in that the starting materials are introduced into the reactor simultaneously and continuously with intensive mixing.

Process for the continuous reaction of halogenopyrimidines with amines

Difluorotriazinyl compounds of the formula ##STR1## are continuously reacted in a reactor with amines in solution or suspension.

Process for the continuous reaction of difluorotriazinyl compounds with

A new process for the preparation of substituted 2,4-diamino-6-flurotriazines of the formula ##STR1## in which the substituents have the meanings given in the description, comprises reacting ammonium salts of the formula ##STR2## in an aqueous medium at pH values of about 2.5-10 with 2,4,6-trifluorotriazine in a continuous process. The reaction products can be converted to dyestuffs without isolating the intermediates.

Process for the preparation of substituted

The present invention relates to a process for the preparation of diisocyanates corresponding to the formula

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Koeln, Germany

Hans-Georg Frosch