发明名称 |
METHOD FOR REMOVING NITROSATION AGENT(S) FROM NITRATED AROMATIC COMPOUNDS |
摘要 |
<p>Nitrosation agent(s), contained as by-products in nitrated aromatic compounds after nitration with nitric acid or nitration acid, are removed by a water treatment. wherein the water is distilled off at least partially in vapor form, advantageously under reduced pressure. In the further reaction of the nitrocompounds treated in this manner undesired nitrosamines are practically not formed. The process is especially suitable for the manufacture of 4-di-n-propylamino-3,5-dinitrobenzotrifluoride (Trifluralin) a valuable herbicide substantially, free from nitrosamlne(s).</p> |
申请公布号 |
CA1144943(A) |
申请公布日期 |
1983.04.19 |
申请号 |
CA19800352291 |
申请日期 |
1980.05.20 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
HABIG, KURT;BAESSLER, KONRAD;SCHULZ, LOTHAR;SCHUETTE, HEINZ |
分类号 |
C07B43/02;C07C201/16;(IPC1-7):C07C79/12;C07C143/78 |
主分类号 |
C07B43/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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