发明名称 |
PROCESS FOR PURIFYING DINITROANILINE HERBICIDES |
摘要 |
A one-step process for the preparation of nitrosamine-free dinitroaniline herbicides which involves contacting the crude dinitroaniline herbicide in the liquid state, after removal of excess amine, with an effective quantity of a hydrobromide salt of a p-amino benzoate ester, optionally in the presence of such an ester, passing a gaseous stream of air therethrough or applying a reduced pressure so as to essentially remove water present, resulting in an essentially nitrosamine-free product. |
申请公布号 |
CA1304754(C) |
申请公布日期 |
1992.07.07 |
申请号 |
CA19870538938 |
申请日期 |
1987.06.05 |
申请人 |
AGAN CHEMICAL MANUFACTURERS LTD. |
发明人 |
PIKARSKI, MICHAEL;DYKMAN, EDMUND |
分类号 |
A01N33/06;A01N33/18;C07C;C07C209/84;C07C209/90;C07C211/52 |
主分类号 |
A01N33/06 |
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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