Charles Ray Marston

US Patent:

7811457, Oct 12, 2010

Filed:

Apr 7, 2006

Appl. No.:

11/885524

Inventors:

Charles R. Marston - Midland MI, US

Assignee:

Dow Global Technologies Inc. - Midland MI

International Classification:

B01D 15/04

US Classification:

210670, 210677, 210743

Abstract:

A method of regenerating N-Methyl-D-glu-camine-functional resin that has been used for boron-removal uses a closed recirculating loop for treating the conjugate acid salt of the N-Methyl-D-glucamine functionality of the resin. The new method reduces rinse water demand and improves pH control in a water treatment system. The new method can be used to improve the performance of boron-selective resins in stand-alone systems or as a second stage in a reverse osmosis seawater desalination system. The regeneration method is useful in any application where weakly basic anion exchange resin in the conjugate acid salt form is to be regenerated (neutralized) by alkaline treatment. Possible end use applications are in drinking water processing, agricultural water treatment, sweetener production, waste water processing, mining hydrometallurgy, and condensate polishing.

US Patent:

20110195000, Aug 11, 2011

Filed:

Feb 10, 2011

Appl. No.:

13/024801

Inventors:

Neil Nebeker - Hayden AZ, US
Matthew Rodgers - Midland MI, US
Charles Marston - Midland MI, US

International Classification:

C01G 51/00

US Classification:

423139

Abstract:

Method of ion exchange cobalt recovery. Raffinate including cobalt, zinc, copper, nickel and ferric iron is produced. In the raffinate, the pH is raised, the solids are removed and ferric iron is reduced. A copper recovery ion exchange unit is loaded with ion exchange resin selective for copper. Raffinate is fed into the copper recovery ion exchange unit which is regenerated to recover substantially all copper. A cobalt/nickel/zinc recovery ion exchange unit is loaded with another ion exchange resin selective for cobalt. Raffinate is fed into the cobalt/nickel/zinc recovery ion exchange unit, the ion exchange resin holding cobalt, zinc and nickel, and then displaced. Cobalt/zinc eluent is fed into the cobalt/zinc/nickel recovery ion exchange unit to elute the cobalt and zinc in a cobalt/zinc solution, and then displaced. Nickel eluent is fed into the cobalt/zinc/nickel recovery ion exchange unit to elute the nickel.

US Patent:

20110290077, Dec 1, 2011

Filed:

May 24, 2011

Appl. No.:

13/114863

Inventors:

Charles R. Marston - Midland MI, US
Matthew Rodgers - Midland MI, US

International Classification:

C22B 23/00

US Classification:

75711

Abstract:

The present invention relates to an improved process for the separating of copper and/or nickel from solutions containing cobalt.

US Patent:

20120298586, Nov 29, 2012

Filed:

May 24, 2012

Appl. No.:

13/479409

Inventors:

Matthew L. Grandbois - Midland MI, US
Harlan Robert Goltz - Midland MI, US
Jeffrey M. Calvert - Acton MA, US
Matthew Lawrence Rodgers - Midland MI, US
Charles R. Marston - Midland MI, US

Assignee:

Dow Global Technologies LLC - Midland MI
Rohm and Haas Electronic Materials LLC - Marlborough MA

International Classification:

B01D 15/04

US Classification:

210670

Abstract:

Methods of purifying acidic metal solutions by removing at least a portion of alpha-particle emitting materials are provided. The purified metal solutions are useful in a variety of applications requiring low levels of alpha-particle emission.

US Patent:

20130104700, May 2, 2013

Filed:

Oct 29, 2012

Appl. No.:

13/662945

Inventors:

Dow Global Technologies LLC - Midland MI, US
Charles R. Marston - Midland MI, US

Assignee:

DOW GLOBAL TECHNOLOGIES LLC - Midland MI

International Classification:

C22B 3/04
C22B 3/02

US Classification:

75743, 266168

Abstract:

A method and system for recovering metal ions from liquid or slurry solutions through an elution column and an enhancing column, each containing a resin. Eluate is recovered as discrete fractions such that the metal ions are substantially separated from one another.

US Patent:

60806966, Jun 27, 2000

Filed:

Aug 3, 1998

Appl. No.:

9/128593

Inventors:

Hilton Duke - Cremorne, AU
John L. Featherstone - El Centro CA
Charles R. Marston - Midland MI

Assignee:

MidAmerican Energy Holdings Company - Omaha NE
The Dow Chemical Company - Midland MI

International Classification:

B01J 2034
B01J 3860

US Classification:

502 27

Abstract:

Methods are disclosed for the regeneration of fouled ion exchange (IX) resins. In one embodiment, the fouled resin is treated simultaneously with reducing agent and acid. In a preferred embodiment, fouled resin is treated with reducing agent and then with acid. Use of reducing agent prior to the use of acid results in surprisingly unexpected improved cleaning as compared to simultaneous treatment with reducing agent and acid.

US Patent:

55741800, Nov 12, 1996

Filed:

Aug 1, 1994

Appl. No.:

8/284826

Inventors:

Donald McQuigg - Mooresville IN
Charles Marston - Midland MI
Gina Fitzpatrick - Indianapolis IN
Ernest Crowe - Beech Grove IN
Susan Vorhies - Indianapolis IN
Ramiah Murugan - Indianapolis IN
Thomas D. Bailey - Greenwood IN

Assignee:

Reilly Industries, Inc. - Indianapolis IN

International Classification:

C07C 5142
C07C 5948
C07C 3516
C07C 6510

US Classification:

558147

Abstract:

Described is a process for recovering phytic acid or phytic acid salt from a medium in which it is contained. This process includes contacting the medium with a solid-phase free base polymer having tertiary amine functions to adsorb the phytic acid or salt thereof. In one preferred mode, the medium to be treated also contains lactic acid, and separate fractions predominant in (i) lactic acid and (ii) phytic acid or phytic acid salt, respectively, are recovered. Also described are preferred processes for treating mediums to recover lactic acid therefrom, and a favored process for obtaining inositol directly by hydrolyzing phytic acid or phytic acid salt while adsorbed on a pyridine-containing polymer.

US Patent:

51552612, Oct 13, 1992

Filed:

Nov 6, 1991

Appl. No.:

7/787767

Inventors:

Charles R. Marston - Indianapolis IN
Gerald L. Goe - Greenwood IN

Assignee:

Reilly Industries, Inc. - Indianapolis IN

International Classification:

C07C 4550

US Classification:

562519

Abstract:

An improved Monsanto-type process for acetic acid preparation and a heterogeneous-supported catalyst for accomplishing the same, comprising reacting methanol with carbon monoxide under pressure of about 65-80 Bar and temperature of about 170. degree. -200. degree. C. in the presence of methyl iodide and a catalyst comprising an insoluble polymer having pendant free base, N-oxide or quaternized pyridine groups supporting a rhodium species loaded to less than about 10 weight percent (expressed as metal) of the polymer component.