Lynn M Frostman

US Patent:

20030146173, Aug 7, 2003

Filed:

Dec 18, 2001

Appl. No.:

10/028802

Inventors:

Gordon Rivers - Houston TX, US
Lynn Frostman - Sugar Land TX, US
Jo McMahon - Arnold MO, US

International Classification:

C02F001/68

US Classification:

210/749000

Abstract:

A method for reducing the toxicity of onium compounds, such as ammonium compounds and phosphonium compounds, by the addition of an anionic polymer is described. Suitable anionic polymers include, but are not necessarily limited to, polycarboxylic acids, polysulfonic acids, polyphosphoric acids, polyphosphonic acids, and mixtures thereof.

US Patent:

20050261529, Nov 24, 2005

Filed:

May 16, 2005

Appl. No.:

11/129799

Inventors:

Daniel Crosby - Sugar Land TX, US
Gordon Rivers - Houston TX, US
Lynn Frostman - Sugar Land TX, US

International Classification:

C07C009/00

US Classification:

585015000

Abstract:

A method for inhibiting formation of hydrocarbon hydrates in mixtures of water and a hydrate-forming guest molecule involves adding an ion pair to the mixtures in an amount effective to inhibit formation of the hydrocarbon hydrates under conditions otherwise effective to form the hydrocarbon hydrates in the absence of the ion pair. In one non-limiting embodiment of the invention the ion pair includes a cationic component that may be a quaternary ammonium compound or an onium compound and a non-cationic counter-ion component that could be an anionic compound, a non-ionic compound and/or an amphoteric compound. Two specific, suitable non-cationic counter-ion components include sodium dodecyl sulfate and ammonium alkyl ether sulfate.