| 摘要 |
<p>A CAUSTIC-FREE PROCESS FOR THE PRODUCTION OF MONOCHLORO-DIAMINO-S-TRIAZINES A new and improved process is provided for preparing monochloro-diamino-s-triazines which are useful as herbicides. The process comprises reacting in A first stage cyanuric chloride and a selected primary alkylamine at elevated temperature to give a dichloro-monoalyl-amino-s-triazine and reacting in a second stage this dichloro-monoalkylamino-s-triazine with an excess of a primary alkylamine which may be introduced as a pure liquid, as gas or as a solution in water. The process gives consistent yields in excess of 97% of monochlorodiamino-s-triazines. Because of the anhydrous conditions in the new caustic-free process and the feasibility of recycling the excess of monoalkylamines employed, no serious effluent problems arise.</p> |
