Spiro D Alexandratos, 72125 Stonehouse Rd, Glen Ridge, NJ 07028

6488859, Dec 3, 2002

May 7, 2001

09/850474

Spiro Alexandratos - Knoxville TN
Christopher A. Shelley - Knoxville TN
E. Philip Horwitz - Naperville IL
Renato Chiarizia - Elmhurst IL
Michael J. Gula - Chicago IL
Sui Xue - Darien IL
James T. Harvey - Naperville IL

Arch Development Corp - Chicago IL
The University of Tennessee Research Corp - Knoxville TN

C02F 142

210660, 210661, 210670, 210681

A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked to the phenyl ring, (ii) about 2 to about 5 millimoles per gram (mmol/g) of phosphorus as phosphonic acid ligands, and (iii) a sufficient amount of a sulfonic acid ligand such that the ratio of mmol/g of phosphonic acid to mmol/g sulfonic acid is up to. A process for removing polyvalent metal cations from aqueous solution, and a process for removing iron(III) cations from acidic copper(II) cation-containing solutions that utilize the contemplated resin or other resins are disclosed.

2008016, Jul 17, 2008

Sep 7, 2004

10/568542

Spiro Alexandratos - Glen Ridge NJ, US
Richard F. Salinaro - Hastings on Hudson NY, US
Laurent Dambies - Newcastle Upon Tyne, GB

The Research Foundation of the City University of New York - New York NY

B01D 15/04
C08F 8/32
C02F 1/42

210665, 5253314, 5253305, 525 55, 210263

Crosslinked polymeric beads for removing arsenate from water, as well as methods for preparing and using the beads are disclosed.

6232353, May 15, 2001

Dec 28, 1998

9/221446

Spiro Alexandratos - Knoxville TN
Christopher A. Shelley - Knoxville TN
E. Philip Horwitz - Naperville IL
Renato Chiarizia - Elmhurst IL

Arch Development Corporation - Chicago IL

C08J 520
C02F 142

521 26

A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked to the phenyl ring, (ii) about 2 to about 5 millimoles per gram (mmol/g) of phosphorus as phosphonic acid ligands, and (iii) a sufficient amount of a sulfonic acid ligand such that the ratio of mmol/g of phosphonic acid to mmol/g sulfonic acid is up to 3:1. A process for removing polyvalent metal cations from aqueous solution, and a process for removing iron(III) cations from acidic copper(II) cation-containing solutions that utilize the contemplated resin or other resins are disclosed.

5712347, Jan 27, 1998

Apr 3, 1997

8/829998

Ralph C. Gatrone - Plymouth PA
Spiro Alexandratos - Knoxville TN
E. Philip Horwitz - Naperville IL

ARCH Development Corp. - Chicago IL
University of Tennessee Research Corp. - Knoxville TN

C08F 840
C08G 7904

525340

An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1. 0 to about 10 mmol/g dry weight phosphorous. The pendent groups have the formula ##STR1## wherein R is hydrogen, a cation or mixtures thereof; and R. sup. 1 is hydrogen or an C. sub. 1 -C. sub. 2 alkyl group. The resin also contains zero to about 5 mmol/g dry weight of pendent aromatic sulfonate groups. Processes for making and using an ion exchange-resin are also disclosed.

4664700, May 12, 1987

Jun 13, 1986

6/874789

Spiro D. Alexandratos - Knoxville TN

University of Tennessee Research Corporation - Knoxville TN

C22B 300

75101BE

The specification discloses a method for the extraction of metal ions having a reduction potential of above about +0. 3 from an aqueous solution. The method includes contacting the aqueous solution with a polymeric extractant having primary phosphinic acid groups, secondary phosphine oxide groups, or both phosphinic acid and phosphine oxide groups.

4879316, Nov 7, 1989

Feb 26, 1987

7/019441

Spiro D. Alexandratos - Knoxville TN
Pier R. Danesi - Vienna, AT
E. Philip Horwitz - Naperville IL

The University of Tennessee Research Corporation - Knoxville TN

C08D 520

521 27

Interpenetrating polymer network ion exchange membranes include a microporous polymeric support film interpenetrated by an ion exchange polymer and are produced by absorbing and polymerizing monomers within the support film. The ion exchange polymer provides ion exchange ligands at the surface of and throughout the support film which have sufficient ligand mobility to extract and transport ions across the membrane.

5281631, Jan 25, 1994

Dec 20, 1991

7/811098

E. Philip Horwitz - Naperville IL
Spiro D. Alexandratos - Knoxville TN
Ralph C. Gatrone - Naperville IL
Ronato Chiarizia - Oak Park IL

Arch Development Corp. - Chicago IL

C08F23002
B01J 3912

521 38

An ion exchange resin for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene disphosphonic acid with styrene, acrylonitrile and divinylbenzene.

5449462, Sep 12, 1995

Jan 21, 1994

8/184609

E. Philip Horwitz - Naperville IL
Spiro D. Alexandratos - Knoxville TN
Ralph C. Gatrone - Naperville IL
Ronato Chiarizia - Oak Park IL

Arch Development Corp. - Chicago IL
University of Tennessee Research Corporation - Knoxville TN

C02F 162
C02F 164
C02F 142

210682

An ion exchange resin for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene diphosphonic acid with styrene, acrylonitrile and divinylbenzene.