| 发明名称 |
Method of manufacturing diphenylmethane dicarbamic acid esters. |
| 摘要 |
<p>According to a method of manufacturing a diphenylmethane dicarbamic acid ester by reacting an N-phenyl carbamic acid ester with a methylating agent in an aqueous acid solution, the aqueous acid solution is an aqueous inorganic acid solution, and the concentration of the N-phenyl carbamic acid ester in the aqueous acid solution is not more than the solubility thereof at the reaction temperature.</p> |
| 申请公布号 |
EP0216273(A2) |
申请公布日期 |
1987.04.01 |
| 申请号 |
EP19860112651 |
申请日期 |
1986.09.12 |
| 申请人 |
NIPPON KOKAN KABUSHIKI KAISHA |
发明人 |
IKARIYA, TAKAO C/O PATENT DIV. NIPPON KOKAN K.K.;MIZUGUCHI, MASATSUGU C/O PAT DIV. NIPPON KOKAN;TAJIMA, OSAMU C/O PAT. DIV. NIPPON KOKAN;ITAGAKI, MASANORI C/O PAT. DIV. NIPPON KOKAN;SAKAI, ITARU C/O PAT. DIV. NIPPON KOKAN |
| 分类号 |
C07C239/00;C07C269/00;C07B61/00;C07C67/00;C07C269/06;C07C271/06;C07C271/28;(IPC1-7):C07C125/073 |
主分类号 |
C07C239/00 |
| 代理机构 |
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