Removal of nitrate from water supplies using a tributyl amine st

Details Removal of nitrate from water supplies using a tributyl amine st Removal of nitrate from water supplies using a tributyl amine st

1983-07-28

1984-10-30

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210683, 210903, C02F 142

Patent

active

044798776

ABSTRACT:
The invention relates to a method for separating nitrate from waters containing a significant amount of sulfate ion. Nitrate removal is accomplished by passing the water to be treated through a bed of a strong-base anion exchange resin which is a tributyl amine derivative of a copolymer exemplified by styrene-divinyl benzene. The tributyl species has been found to have an unusually high selectivity for nitrate over sulfate and provides not only a high capacity for nitrate removal but also economies in regeneration due to the ability to operate with only a partially regenerated resin bed.

REFERENCES:
patent: 2597440 (1952-05-01), Bodamer
patent: 2614099 (1952-10-01), Bauman et al.
patent: 2723245 (1955-11-01), Wheaton
patent: 2788331 (1957-04-01), Greer et al.
patent: 4134861 (1979-01-01), Roubinek
Chemical Abstract 95:12492m, "Unusual Selectivity of a Commercial Ion-Exchange Resin with Respect to Nitrate Exchange", Michael Cox et al, p. 345.
EPA Quarterly Report, Oct.-Dec. 1980 (reference no. 1A).
EPA Quarterly Report, Jan.-Mar. 1981 (reference no. 1B).
Dennis A. Clifford, "Nitrate Removal from Water Supplies by Ion Exchange", EPA-600-2/78-052, Jun. 1978, pp. 48, 49 & 125.
Buelow, R. W. et al, "Nitrate Removal by Anion-Exchange Resins", Journal AWWA, Sep. 1975, pp. 528-534.

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