Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Patent
1979-06-15
1981-07-21
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
C08F 822, B01D 1504, C22B 308, B01J 108
Patent
active
042800030
ABSTRACT:
The preparation of anion exchange resins having high density and capacity by bromination of particles of crosslinked vinylaromatic copolymers is described. The process is characterized in that particles of crosslinked vinyltoluene copolymers which have been swollen in a solvent are dibrominated using bromine or a bromine-releasing agent, and the brominated particles are then aminated. The product resins can be used for the extraction of metals, particularly uranium, from solutions such as ore leaching liquor.
REFERENCES:
patent: 2632000 (1953-03-01), McMaster et al.
patent: 2632001 (1953-03-01), McMaster et al.
patent: 2788331 (1957-04-01), Greer
765,165 Application 2 or A Patent-South Africa, Aug. 22, 1977-B. R. Green.
Grammont Paul D. A.
Herbin Jean E. E.
Diamond Shamrock Corporation
Kulkosky Peter F.
Schofer Joseph L.
Skinner William A.
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