Roger C May

US Patent:

6641754, Nov 4, 2003

Filed:

Jun 11, 2001

Appl. No.:

09/878646

Inventors:

Kristin E. Buentello - Newtown PA
Stephen M. Kessler - Plymouth Township PA
Roger C. May - Warminster PA
Julie A. Kaechelin - Feasterville PA
Fu Chen - West Chester PA
Natalie A. Kolson - West Chester PA

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

C08F 510

US Classification:

252180, 252181, 252175, 524807, 526287

Abstract:

A method of inhibiting the formation and deposition of scale forming moieties in aqueous systems by adding water-soluble or water-dispersible polymers is disclosed. The method comprises adding to an aqueous system a polymer having repeat units characterized by the Formula I: Wherein E is the repeat unit remaining after polymerization of an ethylenically unsaturated compound; preferably, a carboxylic acid, sulfonic acid, phosphonic acid, or amide form thereof or mixtures thereof. R is H or lower (C -C )alkyl. G is âCH â or âCHCH â; R is CH âCH âO or CH âCHCH âO where n ranges from about 1 to 100, preferably about 1 to 20. X is an anionic radical selected from the group consisting of SO , PO , or COO; Z is H or hydrogens or any water soluble cationic moiety which counterbalances the valence of the anionic radical X, including but not limited to Na, K, Ca, or NH. F, when present, is a repeat unit having the structure of Formula II: wherein X and Z are the same as in Formula I. R is H or lower (C -C )alkyl.

US Patent:

7632458, Dec 15, 2009

Filed:

Jan 31, 2006

Appl. No.:

11/343709

Inventors:

Rosa Crovetto - Wayne PA, US
William S. Carey - Wallingford PA, US
Roger C. May - Warminster PA, US
Ping Lue - Boothwyn PA, US
Kristof Kimpe - Beerse, BE

Assignee:

General Electric Company - Schenectady NY

International Classification:

C23F 11/167
C23F 11/14

US Classification:

422 15, 422 16, 422 17

Abstract:

The present invention provides an effective method of inhibiting corrosion on metallic surfaces in contact with a fluid contained in a closed loop industrial fluid system, which comprises adding to such fluid an effective corrosion controlling amount of a combination of an organic diacid, a triamine and a phosphonate compound.

US Patent:

8366915, Feb 5, 2013

Filed:

Jun 26, 2008

Appl. No.:

12/215340

Inventors:

Alan E. Goliaszewski - The Woodlands TX, US
David B. Engel - The Woodlands TX, US
Roger C. May - Warminster PA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

C10G 17/04
C10G 29/26

US Classification:

208252, 208251 R, 208282, 210701

Abstract:

Methods for reducing calcium deposition along surfaces in contact with the water phase of a resolved water/oil emulsion are disclosed. High calcium crude oil and the like are contacted with a sequestrant to form a sequestered calcium containing complex that partitions to the water phase in the resolved emulsion. A specifically formulated polymeric deposit control agent is added to the water phase to inhibit calcium deposit formation therein and along surfaces in contact with the water phase.

US Patent:

20070125685, Jun 7, 2007

Filed:

Dec 2, 2005

Appl. No.:

11/292532

Inventors:

Alan Goliaszewski - The Woodlands TX, US
David Engel - The Woodlands TX, US
Roger May - Warminster PA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

C10G 17/00
C10G 45/00

US Classification:

20825100R

Abstract:

Methods for reducing calcium deposition along surfaces in contact with the water phase of a resolved water/oil emulsion are disclosed. High calcium crude oil and the like are contacted with a sequestrant to form a sequestered calcium containing complex that partitions to the water phase in the resolved emulsion. A specifically formulated polymeric deposit control agent is added to the water phase to inhibit calcium deposit formation therein and along surfaces in contact with the water phase.

US Patent:

43870279, Jun 7, 1983

Filed:

Oct 9, 1981

Appl. No.:

6/310163

Inventors:

Roger C. May - Glenside PA
Frank C. Sessa - Wyncote PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C02F 510

US Classification:

210697

Abstract:

A method for inhibiting corrosion and controlling deposition in an iron containing aqueous medium is disclosed. The method is capable of providing for the formation of a protective passive oxide film on the metallic surfaces in contact with the aqueous medium without resulting in unacceptable iron based deposition or fouling. Surprisingly, the method does not call for the addition of an organic-phosphonic acid compound or derivative to the aqueous medium as would be normally expected due to the known iron dispersing characteristics of these type compounds. The invention comprises maintaining the pH level at 5. 5 or above, assuring that a certain minimal calcium or other ion level is maintained, and adding to the system an orthophosphate compound and a water soluble acrylic acid/hydroxyalkylacrylate copolymer.

US Patent:

44118651, Oct 25, 1983

Filed:

May 28, 1981

Appl. No.:

6/267840

Inventors:

Gary E. Geiger - Philadelphia PA
Roger C. May - Glenside PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C23F 1104

US Classification:

422 16

Abstract:

A method for reducing corrosion of metal surfaces is disclosed according to which a specific corrosion inhibitor is utilized. The inhibitor comprises water-soluble zinc compound, water-soluble chromate compound and copolymer of acrylic acid and hydroxylated lower alkyl acrylate. Water-soluble orthophosphate can also be used.

US Patent:

44433409, Apr 17, 1984

Filed:

May 24, 1983

Appl. No.:

6/497612

Inventors:

Roger C. May - Glenside PA
Frank C. Sessa - Wyncote PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C02F 512

US Classification:

210697

Abstract:

A method for inhibiting corrosion and controlling deposition in an iron containing aqueous medium is disclosed. The method is capable of providing for the formation of a protective passive oxide film on the metallic surfaces in contact with the aqueous medium without resulting in unacceptable iron based deposition or fouling. Surprisingly, the method does not call for the addition of an organic-phosphonic acid compound or derivative to the aqueous medium as would be normally expected due to the known iron dispersing characteristics of these type compounds. The invention comprises maintaining the pH level at 5. 5 or above, assuring that a certain minimal calcium or other ion level is maintained, and adding to the system an orthophosphate compound, a water soluble acrylic acid/hydroxyalkylacrylate copolymer, and a topping agent selected from the group consisting of effective water soluble aminocarboxylic acids, lignosulfonates, citric acid, and tannic acid, and water soluble salt forms and mixtures thereof.

US Patent:

43035680, Dec 1, 1981

Filed:

Dec 10, 1979

Appl. No.:

6/101658

Inventors:

Roger C. May - Glenside PA
Gary E. Geiger - Philadelphia PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C08L 3102
C08L 3302

US Classification:

260 296MP

Abstract:

The invention deals with a method and composition(s) for use in inhibiting corrosion of metallic parts in contact with aqueous systems. It has been discovered that protective oxide films can be formed on the metallic surface if such is allowed to contact an aqueous system containing a sufficient amount for the purpose of a polymer composed primarily of acrylic moieties and hydroxylated lower alkyl acrylate moieties and a water-soluble orthophosphate. Optionally but desirably, polyphosphates, organo-phosphonates, and copper corrosion inhibitors may be included.