Preparation of amino-s-triazines

Abstract

Abstract A NEW AND IMPROVED MULTI-STAGE PROCESS IS PROVIDED FOR PREPATING AMINO-S-TRIAZINES AND PARTICULARLY, 2,4DICHLORO-6-AMINO-S-TRIAZINES WHICH ARE USEFUL AS INTERMEDIATES, THE PROCESS INVOLVES REACTING CYANURIC CHLORIDE, A SELECTED PRIMARY OR SECONDARY AMINE AND AN ALKALI METAL HYDROXIDE, IN TWO OR MORE SATGES, WHEREIN ABOUT 80 TO ABOUT 97% OF THE CYANURIC CHLORIDE IS CONVERTED TO THE 2,4-DICHLORO INTERMEDIATED PRODUCT IN THE LFIRST STAGE AND ADDITIONAL MINOR PROPORTIONS OF THE ALKALI METAL HYDROXIDE ARE ADDED TO TEH SECOND, AND ANY SEUCCEDING STAGES FOR THE PROCESS TO COMPLETE THE DESIRED CONVERSION, BY EMPLOYING SUCH A REACTION SYSTEM, IT IS POSSIBLE TO PREPARE INTERMEDIATE REACTION MIXTURES WITH INSIGINIFICANT HYDROLYSIS LOSSES AND SUCH INTERMEDIATE REACTION MIXTURES CAN THEN BE READILY CONVERTED TO THE FINAL PRODUCTS, I.E., 2-CHLORO-4,6-DIAMINO-S-TRAZINES WHICH ARE USEFUL IN INHIBITING THE GROWTH OF PLANTS AND ARE CONSQUENTLY WIDELY EMPLOYED AS HERBICIDES, THE PRESENT PROCEDURE REPRESENTS A MARKED IMPROVEMENT IN THE PROCESS FOR PREPARING THE 2,4-DICHLORO-6-AMINO-S-TRAZINE INTERMEDIATE PRODUCTS SINCE NOT ONLY ARE HIGHER YIELDS AND PURITIES OF THE DESIRED INTERMEDIATE PRODUCTS OBTAINED BUT IN ADDITION, THE PROCESS IS SUITABLY ADAPTED FOR LARGE SCALE PRODUCTION.

Inventors

• 👤 Hiram Gerald Daugherty
• 👤 William J Evers
• 👤 Philip G Mccracken

Bibliographic Details