Heat exchange fluids comprising amine carboxylates
View Patent ↗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 2 ) 0-3 COOH. A preferred monoamine heat exchange fluid utilizes triethanolamine formate. Lower carboxylate salts of diamines and triamines having the formula R 2 [N[(CH 2 ) m NR] 1-2 ]R where each R is independently selected from moieties of the formula —C n H 2n+1 and moieties of the formula H[O(CH 2 ) 1-4 ]—, each m is independently a number from 1 to 6, and each n is a number from 1 to 4, are disclosed as compounds.
1. An amine carboxylate aqueous fluid, comprising:
a reaction product of an amine of the formula R 2 [N[(CH 2 ) m NR] 1-2 ]R and an acid of the formula H(CH 2 ) 0-3 COOH where each R is independently selected from moieties of the formula —C n H 2n+1 and moieties of the formula H[O(CH 2 ) 1-4 ]—, each m is independently an integer from 1 to 6, and each n is an integer from 1 to 4; and
an alkali metal formate.
2. The amine carboxylate aqueous fluid of claim 1 , wherein the amine is further alkoxylated.
3. The amine carboxylate aqueous fluid of claim 1 , wherein the amine is a diamine and at least one R is a moiety of the formula H[O(CH 2 ) 1-4 ]—.
4. The amine carboxylate aqueous fluid of claim 1 , wherein the amine is a diamine of the formula R 2 N(CH 2 ) 2 NR 2 .
5. The amine carboxylate aqueous fluid of claim 1 , wherein the amine is a diamine and at least one R is a moiety of the formula —C n H 2n+1 .
6. The amine carboxylate aqueous fluid of claim 1 , wherein the amine is a triamine and at least one R is a moiety of the formula H[O(CH 2 ) 1-4 ]—.
7. The amine carboxylate aqueous fluid of claim 6 , the triamine has the formula R 2 N(CH 2 ) 6 NR(CH 2 ) 6 NR 2 .
8. The amine carboxylate aqueous fluid of claim 1 , wherein the amine is a triamine and at least one R is a moiety of the formula —C n H 2n+1 .
9. The amine carboxylate aqueous fluid of claim 1 , wherein the reaction product is triamine formate.
10. The amine carboxylate aqueous fluid of claim 1 , wherein the alkali metal formate is potassium formate.
11. The amine carboxylate aqueous fluid of claim 1 , wherein a ratio of the alkali metal formate to the reaction product is 1:10 to 10:1.
12. An amine carboxylate aqueous fluid, comprising:
a reaction product of an amine of the formula R 2 [N[(CH 2 ) m NR]]R and an acid of the formula H(CH 2 ) 0-3 COOH where each R is independently selected from moieties of the formula —C n H 2n+1 and moieties of the formula H[O(CH 2 ) 1-4 ]—, each m is independently an integer from 1 to 6, and each n is an integer from 1 to 4; and
potassium formate.
13. The amine carboxylate aqueous fluid of claim 12 , wherein the amine is a diamine and at least one R is a moiety of the formula H[O(CH 2 ) 1-4 ]—.
14. The amine carboxylate aqueous fluid of claim 12 , wherein the amine is a diamine of the formula R 2 N(CH 2 ) 2 NR 2 .
15. The amine carboxylate aqueous fluid of claim 12 , wherein the amine is a diamine and at least one R is a moiety of the formula —C n H 2n+1 .
16. The amine carboxylate aqueous fluid of claim 12 , wherein a ratio of the potassium formate to the reaction product is 1:10 to 10:1.
17. An amine carboxylate aqueous fluid, comprising:
a reaction product of an amine of the formula R 2 [N[(CH 2 ) m NR] 2 ]R and an acid of the formula H(CH 2 ) 0-3 COOH where each R is independently selected from moieties of the formula —C n H 2n+1 and moieties of the formula H[O(CH 2 ) 1-4 ]—, each m is independently an integer from 1 to 6, and each n is an integer from 1 to 4; and
potassium formate.
18. The amine carboxylate aqueous fluid of claim 17 , wherein the amine is a triamine and at least one R is a moiety of the formula H[O(CH 2 ) 1-4 ]—.
19. The amine carboxylate aqueous fluid of claim 17 , wherein the amine is a triamine of the formula R 2 N(CH 2 ) 6 NR(CH 2 ) 6 NR 2 .
20. The amine carboxylate aqueous fluid of claim 17 , wherein the amine is a triamine and at least one R is a moiety of the formula —C n H 2n+1 .