Chromatographic separation of metals with polyetherurethane part

Details Chromatographic separation of metals with polyetherurethane part Chromatographic separation of metals with polyetherurethane part

1985-05-06

1986-08-12

Therkorn, Ernest G.

Liquid purification or separation

Processes

Chromatography

2101982, 2105021, 55 67, 55386, 75101BE, 423139, 423DIG14, B01D 1508

Patent

active

046055045

ABSTRACT:
The invention relates to polyetherurethane particles having absorptive activity whereby these particles may be applied for the extractions or the separations of metal ions from liquids, e.g. from waste liquors leaving galvanizing, printing and metal working industries. The particles are of a spherical shape, have a bulk density of at least 0.5 g/cm.sup.3 and are resistant against acidic liquids.
The invention provides a method for such extractions and separation.
The invention provides also a method for production of the polyetherurethane particles by forming a prepolymer and subjecting the dissolved prepolymer in the presence of 2-methylpiperazine suspension to polycondensation.

REFERENCES:
patent: 3148173 (1964-09-01), Axelrood
patent: 3281397 (1966-10-01), Axelrood
patent: 3294724 (1966-12-01), Axelrood
patent: 3410817 (1968-12-01), McClellan
patent: 3424772 (1969-01-01), Moshier
patent: 3655627 (1972-04-01), Hutzler
patent: 3905929 (1975-09-01), Noll

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