John A Hallman

US Patent:

6893582, May 17, 2005

Filed:

Feb 16, 2001

Appl. No.:

09/788115

Inventors:

Kevin W. Smith - McMurray PA, US
John H. Hallman - New Waverly TX, US
Lori Acor - Houston PA, US
Joseph Miller - Aliquippa PA, US

Assignee:

Clearwater International, L.L.C. - Houston TX

International Classification:

C09K005/00

US Classification:

252 76, 252 77, 252 79

Abstract:

A heat transfer fluid comprising potassium formate is used to good effect in line heaters for heating natural gas in gas transmission lines, and for other uses. The solution is heated in a liquid heat transfer medium in a fluid heating zone and transferred to a gas heating zone.

US Patent:

7060198, Jun 13, 2006

Filed:

May 8, 2002

Appl. No.:

10/141390

Inventors:

Kevin W. Smith - McMurray PA, US
Larry W. Gatlin - Floresville TX, US
John H. Hallman - New Waverly TX, US

Assignee:

Clearwater International, L.L.C. - Houston TX

International Classification:

C09K 5/00

US Classification:

252 70, 252 73, 252 75, 252 77

Abstract:

Carboxylate salts of amines are used as components of heat exchange fluids. The amines may have a ratio of N to C of 1:0 to 1:12 and the carboxylate anion may be derived from an acid of the formula H(CH)COOH. A preferred monoamine heat exchange fluid utilizes triethanolamine formate. Lower carboxylate salts of diamines and triamines having the formula R[N[(CH)NR]]R where each R is independently selected from moieties of the formula —CHand moieties of the formula H[O(CH)]—, each m is independently a number from 1 to 6, and each n is a number from 1 to 4, are disclosed as compounds.

US Patent:

7452480, Nov 18, 2008

Filed:

Oct 14, 2005

Appl. No.:

11/251058

Inventors:

Kevin W. Smith - McMurray PA, US
Larry W. Gatlin - Floresville TX, US
John H. Hallman - New Waverly TX, US

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

C09K 5/00

US Classification:

252 71, 252 73, 252 74, 252 75, 252 76

Abstract:

Carboxylate salts of amines are used as components of heat exchange fluids. The amines may have a ratio of N to C of 1:0 to 1:12 and the carboxylate anion may be derived from an acid of the formula H(CH)COOH. A preferred monoamine heat exchange fluid utilizes triethanolamine formate. Lower carboxylate salts of diamines and triamines having the formula R[N[(CH)NR]]R where each R is independently selected from moieties of the formula —CHand moieties of the formula H[O(CH)]—, each m is independently a number from 1 to 6, and each n is a number from 1 to 4, are disclosed as compounds.

US Patent:

7713435, May 11, 2010

Filed:

Nov 18, 2008

Appl. No.:

12/273327

Inventors:

Kevin W. Smith - McMurray PA, US
Larry W. Gatlin - Floresville TX, US
John H. Hallman - New Waverly TX, US

Assignee:

Clearwater International, L.L.C. - Houston TX

International Classification:

C09K 5/00

US Classification:

252 71, 252 73, 252 74, 252 75, 252 76

Abstract:

Carboxylate salts of amines are used as components of heat exchange fluids. The amines may have a ratio of N to C of 1:0 to 1:12 and the carboxylate anion may be derived from an acid of the formula H(CH)COOH. A preferred monoamine heat exchange fluid utilizes triethanolamine formate. Lower carboxylate salts of diamines and triamines having the formula R[N[(CH)NR]]R where each R is independently selected from moieties of the formula —CHand moieties of the formula H[O(CH)]—, each m is independently a number from 1 to 6, and each n is a number from 1 to 4, are disclosed as compounds.