Process for recovering precious metals from bimetallic material

Details Process for recovering precious metals from bimetallic material Process for recovering precious metals from bimetallic material

1979-10-01

1981-04-14

Ozaki, G.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75101R, 75117, 75118R, 75119, 75120, 75121, 423 32, C22B 1104

Patent

active

042617383

ABSTRACT:
Process and apparatus for recovering a precious metal, either as pure metal or in alloyed form, from a bimetallic material in which the precious metal is mechanically bonded to a base material comprising at least one base metal, e.g., copper, brass or bronze. The base material is leached off with an ammoniacal solution of an ammonium salt, preferably ammonium carbonate, using a leaching liquid containing reactive oxygen. The base metal or metals are recovered as metal compounds by thermally decomposing the resulting pregnant leach liquor; and the ammonia and ammonium salt are reconstituted for recycling. The method and apparatus are particularly suited for recovering karat gold from filled gold scrap.

REFERENCES:
patent: 1622960 (1927-03-01), Meyer
patent: 2647829 (1953-08-01), McGauley et al.
patent: 2698220 (1954-12-01), Erskine
patent: 2807533 (1957-09-01), Abramson
patent: 3163524 (1964-12-01), Weisbery et al.
patent: 3577325 (1971-05-01), Fairchild

Affiliated with

Also associated with

Rating

Process for recovering precious metals from bimetallic material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for recovering precious metals from bimetallic material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovering precious metals from bimetallic material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-156875