申请人:Spindler Jean-Francis
公开号:US20060149093A1
公开(公告)日:2006-07-06
The invention concerns a method for separating a hydroxybenzonitrile-type compound obtained by an amination/dehydration process. More particularly, the invention concerns 2-hydroxybenzonitrile, also called 2-cyanophenol. The inventive method for separating a hydroxybenzonitrile compound from a reaction gas flow comprising it wholly or partly in the form of an ammonium salt is characterized in that it consists in displacing the ammonium ions, through a physical treatment carried out on the reaction gas flow derived from its preparation or from the solid previously recuperated from said flow or according to a chemical treatment carried out on the reaction gas flow, after liquefaction.
本发明涉及一种分离通过氨化/脱水过程获得的羟基苯甲腈类化合物的方法。更具体地,本发明涉及2-羟基苯甲腈,也称为2-氰基苯酚。从完全或部分以铵盐形式存在的反应气体流中分离羟基苯甲腈化合物的本发明方法的特点在于,它通过对其制备所得的反应气体流或从该流中预先回收的固体进行的物理处理,或者根据液化后的反应气体流进行的化学处理,来移除铵离子。