| 摘要 |
<p>A method and installation for separating and purifying a crude mixture containing hydroquinone, resorcinol and possibly tars and/or catechol, comprising the following steps: - a possible distillation stage (1) in order to obtain a catechol head, - the foot (1) or crude mixture undergoes distillation (II) in order to obtain a fraction that is rich in resorcinol, - the foot of (II) undergoes distillation (III) in order to obtain a fraction that is rich in hydroquinone, whereupon said rich fractions are refined (IV or V). Preferably, one or several stages in which tar is removed (I,1') precede stage (I) or (II).</p> |
