Method of using higher concentration sulfuric acid for stripping

Details Method of using higher concentration sulfuric acid for stripping Method of using higher concentration sulfuric acid for stripping

1983-03-23

1985-01-15

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

210656, 210677, 210687, B01D 1506, B01J 4900

Patent

active

044939078

ABSTRACT:
This invention relates to the regeneration of cation exchanger resin containing adsorbed magnesium ions, and the recovery of the magnesium as a crystalline precipitate. The regeneration uses moderate to high concentration aqueous H.sub.2 SO.sub.4, and the recovered precipitate comprises one or more co-crystallization compounds of MgSO.sub.4 and H.sub.2 SO.sub.4.

REFERENCES:
patent: 3342756 (1967-09-01), Martinola et al.
patent: 3382035 (1968-05-01), Slater
patent: 3658699 (1972-08-01), Ryan et al.
patent: 3660283 (1972-05-01), Ryan
patent: 4228001 (1980-10-01), Carlson
patent: 4280904 (1981-07-01), Carlson
patent: 4363880 (1982-12-01), Whitney et al.
patent: 4385993 (1983-05-01), Hedrick et al.

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