Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1977-07-21
1980-09-02
Levin, Stanford M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
75101BE, 210679, 252426, 252431R, 252431N, 260349, 260566AE, 260950, 568619, B01D 1508, B01J 806, C08J 940
Patent
active
042207266
ABSTRACT:
Extraction agents for the extraction of copper, zinc, uranium and nickel, or any of these, from aqueous solutions containing same, comprise a macroporous polymer supporting a specific extractant for such metal, the polymer being rendered hydrophilic by the method of impregnation or by attachment thereon of suitable functional groups, or by attaching such functional groups to the extraction agent, or by coabsorbing on said polymer an agent adapted to render the polymer hydrophilic. Such extraction agents may be produced by impregnating a macroporous polystyrene with a specific metal extraction agent in the presence of a diluent for the extraction agent, removing external diluent, contacting the product with a solution of the metal to be extracted, and removing the metal from the extraction agent by a suitable eluting agent. Alternatively, a macroporous polymer may be impregnated with a selective extraction agent complexed with the metal to be extracted in the presence of a diluent, the external diluent removed and the metal eluted with a suitable eluent. Furthermore, macroporous polymers containing finely dispersed metal powders may be prepared, which polymers can be used as catalyst in organic synthesis.
REFERENCES:
patent: 3146213 (1964-08-01), Small
patent: 3960762 (1976-06-01), Kroebel et al.
Warshawsky, A., and Patchornik, A., "Recent Developments in Metal Extraction by Solvent Impregnated Resins," in The Theory and Practice of Ion Exchange, 1976, (ed M. Streat), London SCI, 38.
Resin Impregnates: The Current Position, Chem. and Ind., pp. 641-646 (Aug. 6, 1977).
Levin Stanford M.
Yeda Research & Development Co. Ltd.
LandOfFree
Impregnated resins for extraction of metals and processes of pro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Impregnated resins for extraction of metals and processes of pro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impregnated resins for extraction of metals and processes of pro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1709241