Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1978-06-07
1981-06-30
Bashore, S. Leon
Liquid purification or separation
Processes
Ion exchange or selective sorption
210749, 156605, 423629, 423630, B01D 1500
Patent
active
042761603
ABSTRACT:
A method of purifying waste water with treated aluminum oxide. The method comprises contacting the waste water with Al.sub.2 O.sub.3 which has been treated with ions which when incorporated in the crystal lattice of the Al.sub.2 O.sub.3 are capable of delaying crystallization of the gamma phase of the Al.sub.2 O.sub.3 or with the salts of said ions.
In one embodiment, the Al.sub.2 O.sub.3 is artificially synthesized and the treatment comprises incorporating the ions, which may be either anions or cations, in the course of the synthesis.
Alternatively, the Al.sub.2 O.sub.3 may be treated by subjecting the Al.sub.2 O.sub.3 to a surface treatment with ions capable of delaying crystallization of the gamma phase or the salts thereof.
In yet another embodiment, the Al.sub.2 O.sub.3 may be doped with CO.sub.2.
REFERENCES:
patent: 3839536 (1974-10-01), Sato et al.
patent: 3912521 (1975-10-01), Cline et al.
patent: 3998732 (1976-12-01), Solbach et al.
patent: 4019952 (1977-04-01), Ploetz et al.
Chem. Abst., vol. 83, 1975, 15285j, Fukumori.
Chem. Abst., vol. 85, 1976, 85:9925t, Koehler.
Donnert Dietfried
Eberle Siegfried
Endres Gerhard
Bashore S. Leon
Kernforschungszentrum Karlsruhe GmbH
Lander Ferris H.
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