Process of separating and recovering metal values from a waste s

Details Process of separating and recovering metal values from a waste s Process of separating and recovering metal values from a waste s

1989-07-27

1991-03-26

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415715, 204130, 204140, 210688, 210912, 210913, 423 54, 423 55, 423DIG14, C02F 148

Patent

active

050026453

ABSTRACT:
Described is a method of separating and recovering metal values from a waste stream containing metal hydroxides comprising the steps of providing an aqueous waste stream containing metal values including chromium; subjecting the waste stream to an oxidation process to convert the chromium to chromium (VI); precipitating the other metal values in the aqueous stream by adjusting the pH of the stream to cause the precipitations; and separately recovering the chromium (VI) from the remaining metal values. The process described pertains to separating and recovering metal values such as those from an electroplating process or an electroless process wherein the metals may be iron, cobalt, zinc, cadmium, nickel, copper, silver, aluminum and chromium. The chromium recovery step is performed by oxidizing chromium (III) to chromium (VI) preferably in the presence of a manganese catalyst and preferably utilizing ultrasound waves. The remaining metal values are separated by the use of a chelating ion exchange resin.

REFERENCES:
patent: 2733204 (1956-01-01), Costa
patent: 3245892 (1966-04-01), Jones
patent: 4151257 (1979-04-01), Muller et al.
patent: 4318788 (1982-03-01), Duffey
patent: 4369100 (1983-01-01), Sawyer
patent: 4680126 (1987-07-01), Frankard et al.
patent: 4731166 (1988-03-01), Jones
patent: 4755270 (1988-07-01), Aliotta
The Journal of Inorganic Nuclear Chemistry, 1977, vol. 39, pp. 1081-1084, Basak et al.

Affiliated with

Also associated with

Rating

Process of separating and recovering metal values from a waste s 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 of separating and recovering metal values from a waste s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of separating and recovering metal values from a waste s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-615278