发明名称 |
NITROPHENOL PREPARATION METHOD |
摘要 |
The invention relates to a method of preparing a high-purity nitrophenol and, more specifically, p-nitrophenol from a nitrohalobenzene. The inventive method comprises the following steps: (a) hydrolysis of a nitrohalobenzene compound by reacting said compound with a base; (b) acidification in order to produce the nitrophenol compound from the salt thereof by means of an acid treatment; (c) crystallisation of the nitrophenol compound obtained; and (d) separation of the product obtained. The invention is characterised in that it also comprises at least the following steps: (e) concentration of the reaction medium after hydrolysis (a) and before acidification (b); and (f) liquid/liquid decantation after acidification (b) and before crystallisation (c), which is intended to eliminate the water phase obtained after acidification (b). |
申请公布号 |
WO2004007424(A1) |
申请公布日期 |
2004.01.22 |
申请号 |
WO2003FR02143 |
申请日期 |
2003.07.09 |
申请人 |
RHODIA CHIMIE;FACHE, ERIC;RIGHINI, SEBASTIEN |
发明人 |
FACHE, ERIC;RIGHINI, SEBASTIEN |
分类号 |
C07C201/12;C07C21/12;C07C201/16;C07C205/22 |
主分类号 |
C07C201/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|