Catalytic destruction of sulfur-oxygen anions

Details Catalytic destruction of sulfur-oxygen anions Catalytic destruction of sulfur-oxygen anions

1990-07-25

1991-06-04

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210668, 210670, 210679, 210683, 210743, 210757, C02F 142, C02F 170

Patent

active

050211633

ABSTRACT:
Anions containing sulfur and oxygen, e.g. thiosulfate, can be catalytically reduced using a protonated anion ion exchange resin as a catalyst. The process is preferably conducted in an aqueous system and at a pH below about 8.

REFERENCES:
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patent: 3817862 (1974-06-01), Hoke
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patent: 4569769 (1986-02-01), Walton et al.
patent: 4582690 (1986-04-01), Rempel et al.
"Ion-Exchange Sorption of Thiosulfate and Tetrathionate on Protonated Poly(4-Vinyl Pyridine)," M. Chanda et al., Reactive Polymers, 1984, pp. 269-278.
"In-Situ Precipitation as the Regeneration Step in Ion Exchange for Silver Recovery," P. R. Quinones, SMPTE Journal, Sep. 1984, pp. 800-807 and p. 803.
"Ion Exchange Polymers," R. L. Albright and P. A. Yarnell, Encyclopedia of Polymer Science and Engineering, 2nd. Ed., 1987, vol. 8, John Wiley and Sons, Inc., New York, New York, p. 373.

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