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公开(公告)号:US07425247B2
公开(公告)日:2008-09-16
申请号:US10530917
申请日:2004-02-13
IPC分类号: B01D3/34 , B01D3/42 , C01B21/14 , C01C1/00 , C07C239/00
CPC分类号: C01B21/1445 , B01D3/343 , Y10S203/06
摘要: This invention relates to a method for producing an aqueous solution of free hydroxylamine (HA) by simultaneous countercurrent treatment of a HA salt with ammonia or ammonia water, then separating the HA by distillation and reconcentrating the aqueous HA solution in a countercurrent with a stripping medium. The stripping medium used according to the invention is a mixture of steam and a non-condensable inert gas and the process temperature at a defined pressure is controlled by the quantity of non-condensable inert gas at the column inlet. The preferred non-condensable inert gas is nitrogen. This results in increased safety and a reduction in losses of the method for producing aqueous solutions of free HA.
摘要翻译: 本发明涉及通过与氨或氨水同时对HA盐进行逆流处理,然后通过蒸馏分离HA和将HA水溶液再次与汽提介质逆流再浓缩来制备游离羟胺(HA)的水溶液的方法 。 根据本发明使用的汽提介质是蒸汽和不可冷凝惰性气体的混合物,并且在限定压力下的工艺温度由塔入口处的不可冷凝惰性气体的量来控制。 优选的不可冷凝惰性气体是氮气。 这导致提高游离HA的水溶液的安全性和减少生产水溶液的方法的损失。