公开(公告)号：US4578253A

公开(公告)日：1986-03-25

申请号：US575600

申请日：1984-01-31

申请人： Roger F. Gill ,  Pundi L. Narasimham

发明人： Roger F. Gill ,  Pundi L. Narasimham

IPC分类号： B01D53/46 ,  B01D33/00 ,  B01D36/00 ,  B01D37/00 ,  B01D53/34 ,  B01D53/64 ,  B01D53/77 ,  B01D61/14 ,  C03B37/014 ,  C03B37/018 ,  C03B37/025 ,  C03B37/075

CPC分类号： C03B37/01846 ,  B01D36/00 ,  B01D53/46 ,  B01D61/147 ,  B01D61/18 ,  B01D63/06 ,  C03B37/0144 ,  Y10S261/46

摘要： The effluent of a process for making a preform from which an optical fiber is drawn is directed into a scrubber (40) of a loop (20) where it is treated with an aqueous solution to provide a solvent mixture which comprises particulates and a solvent solution including germanium. Subsequently, the solvent mixture is moved into a first filter system (55) which provides a filtrate free of particulates above a first size that is returned to the scrubber for reuse and a residue. Then the residue from the first filter system is moved into a second filter system (80) which provides a filtrate free of particulates larger than a second size that is smaller than the first size and a residue. The filtrate from the second filter system also is returned to the scrubber for reuse while the residue from the second filter system is recirculated therethrough. When the germanium concentration reaches a predetermined level, portions of the residue from the second filter system are withdrawn and subsequently treated with a precipitating agent to recover germanium.

摘要翻译： 用于制造预成型体的方法的流出物被引导到环（20）的洗涤器（40）中，其中用水溶液处理，以提供包含颗粒和溶剂溶液的溶剂混合物 包括锗。 随后，将溶剂混合物移入第一过滤系统（55），该第一过滤器系统（55）提供不含高于第一大小的微粒的滤液，其返回到洗涤器中用于再利用和残留。 然后将来自第一过滤系统的残余物移入第二过滤器系统（80），其提供不含比第一尺寸小的第二尺寸的颗粒的滤液和残余物。 来自第二过滤器系统的滤液也被返回到洗涤器中以便重新使用，而来自第二过滤器系统的残余物通过其再循环。 当锗浓度达到预定水平时，取出来自第二过滤系统的残余物的一部分，然后用沉淀剂处理以回收锗。