Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1983-09-01
1985-03-12
Straub, Gary P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
423157, 423181, 423497, 210667, 210680, C22B 2620, C22B 2610, C01D 1506
Patent
active
045044589
ABSTRACT:
Gypsum as a byproduct in the manufacture of phosphoric acid is converted into potassium sulphate or sodium sulphate by subjecting an aqueous slurry to anion exchange under acidic conditions. Adding solid potassium chloride to the obtained solution of potassium sulphate causes the latter to crystallize in pure state, the potassium chloride solution recovered after filtering off the crystallized potassium sulphate being used for the regeneration of the anion exchanger.
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Lindsay et al., Basic Operating Characteristics of a Strongly Basic Anion Exchanger, Industrial & Engineering Chemistry, May 1951, pp. 1085-1087.
Rosen Lawrence
Straub Gary P.
Superfos A/S
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