Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1994-03-28
1995-09-19
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
204DIG13, 205 99, 205300, 210670, 210688, B01D 1504
Patent
active
054513235
ABSTRACT:
A method of recovering and reproducing a tinning liquid containing Fe ions and other detrimental cations by the steps of removing cations from the tinning liquid by passing the tinning liquid or a diluted liquid of the tinning liquid through a strong-acid cation exchange resin to obtain a recovered acid, thereafter reproducing the strong-acid cation exchange resin and desorbing adsorbed cations into a solution containing an acid by passing the acid through the exchange resin to which the cations have been adsorbed, precipitating and separating Sn ions in the form of a precipitate of an Sn compound from the solution into which the cations have been desorbed while maintaining Fe ions as ions in this solution, mixing and dissolving the precipitate of the Sn compound or a compound reduced from the same in the recovered acid to reproduce and reuse the mixture of the Sn compound and the recovered acid as a tinning liquid, and discharging the solution containing Fe ions out of the system of the tinning liquid.
REFERENCES:
patent: 4006213 (1977-02-01), Fisher et al.
patent: 4219390 (1980-08-01), Stuart
Akao Kenichiro
Kikuchi Toshihiro
Mochizuki Kazuo
Ogata Hajime
Yamato Koji
Cintins Ivars
Kawasaki Steel Corporation
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