Process for removing heavy-metal ions from aqueous solutions

Patent 4238328 Issued on December 9, 1980. Estimated Expiration Date:

February 14, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2882185

3305493

3311594

Process for the purification of industrial effluents
Patent #: 3979285
Issued on: 09/07/1976
Inventor: Wegmuller , et al.

Polyamidepolyamine and polyanionic polymer pretreated non-cellulosic carrier adsorption agents
Patent #: 3997483
Issued on: 12/14/1976
Inventor: Wurster , et al.

Process for the purification of industrial effluents
Patent #: 4026796
Issued on: 05/31/1977
Inventor: Wegmuller , et al.

Process for the purification of industrial effluents Patent #: 4079001
Issued on: 03/14/1978
Inventor: Haase , et al.

Inventors

Assignee

Ciba-Geigy Corporation

Application

No. 06/011970 filed on 02/14/1979

US Classes:

210/688, Heavy metal210/502.1, Sorptive component containing528/254, Nonaldehyde or nonaldehyde derivative heterocyclic reactant contains a six membered ring having three nitrogen and three carbon atoms as ring members528/289, Final product contains nitrogen atom as a member of a heterocyclic ring528/341Heterocyclic-containing reactant other than cyclic acid anhydride as sole hetero ring

Examiners

Primary: Granger, Theodore A.

Attorney, Agent or Firm

Almaula; Prabodh I.

International Classes

C02F 1/28 (20060101)
B01J 20/22 (20060101)

Foreign Application Priority Data

1978-02-24 CH

Abstract

A process for removing heavy-metal ions from aqueous solutions, particularly from effluents. The process comprises bringing the aqueous solutions into contact with a water-insoluble adsorbent which has been produced from:(a) a basic polynitrogen compound capable of being acylated;(2) an aliphatic or araliphatic carboxylic acid containing mobile substituents or a multiple bond capable of undergoing addition; and(3) a crosslinking compound which contains at least two reactive substituents and which is different from component (2).