ENGH①   D15②       62855 D/35（D = US4289 -531④
Recovery of precious metals from soln. 一 by contact with feathers, hair, hoof meal or horn meal ⑤
ENGELHARD MINERALS CORP® 12. 02. 80 - US -120801 ⑦
J01 M25 ⑧（15.09.81）⑨        *GB2069 -472 ⑩ C22b - 11/04
C22b - 23 + C22b - 15 C22b -19⑪
12. 02. 80⑫      as 120801 ⑬     （397MR）⑭
Removal of metals selected from one or more of Pt, Rh, Pd, Ru, Au, Ag, Ir, Zn, Al, Fe, Cu, Ni and Sn from aq. soln, by adding at least one unmodified proteinaceous material selected from feathers, hair, hoof meal and hom meal. The materials are left in contact for sufficient time for the protein to react with the metal before sepg. the metal combined with the proteinaceous material.
Pref. the materials are left in contact for at least one hour at 5 -90 deg. C.
The method is esp. suitable for the recovery of Pt, Pd and Rh metals from soln, esp. industrial waste solns. （6pp）⑮
 
本专利介绍从水溶液中除去下列一种或多种金属的方法。这些金属包括铂、铑、钯、钌、金、银、铱、锌、铝、铁、铜、镍和锡。采用的方法是，在溶液中至少加人下列一种天然蛋白质物质：羽毛、毛发、蹄粉、角粉。
 
为了使蛋白质与金属反应，蛋白质与金属需接触足够长的时间才可把金属与蛋白质物质一起分离出来。
 
最佳方案是，在5℃-95℃下，蛋白质物质在溶液中至少接触1小时。
 
此法特别适合于从溶液中特别是从工业废水中回收铂、铑、钯这些金属。（6页）