公开(公告)号：US4154804A

公开(公告)日：1979-05-15

申请号：US863507

申请日：1977-12-22

申请人： John D. Walker ,  Darrell B. Reed

发明人： John D. Walker ,  Darrell B. Reed

IPC分类号： B01D53/68 ,  C01B7/07 ,  B01D53/34

CPC分类号： B01D53/68 ,  C01B7/0706 ,  Y02C20/30

摘要： In accordance with the process of the present invention, substantially complete removal of hydrogen fluoride values from a hydrogen chloride gas stream containing the same is effected by a process wherein the gas stream is contacted with an aqueous medium containing calcium chloride and hydrogen chloride under conditions sufficient to precipitate calcium fluoride, thereby producing a hydrogen chloride acid gas substantially free of hydrogen fluoride. The aqueous solution containing the calcium fluoride solids may be treated as by filtration to remove the solids and the recovered liquor may be recycled to the absorption stage, with optional addition of make-up calcium chloride, for removal of additional hydrogen fluoride.

摘要翻译： 根据本发明的方法，从含有该氟化氢气流的氯化氢气流中基本上完全除去氟化氢值通过一种方法进行，其中气流在含有氯化钙和氯化氢的水性介质中与足够的条件相接触 以沉淀氟化钙，从而产生基本上不含氟化氢的氯化氢酸性气体。 可以通过过滤处理含氟化钙固体的水溶液以除去固体，并且回收的液体可以再循环到吸收阶段，任选地加入补充氯化钙，以除去另外的氟化氢。