Heat transfer fluid, additive package, system and method
View Patent ↗Disclosed herein is a heat transfer fluid, comprising a hydroxylated carboxylic acid of formula (OH)x(R1)(COOH)y, wherein x is 2 to 10, y is 3 to 10, and R1 is a C2-50 aliphatic group, a C6-50 aromatic group, or a combination thereof; and wherein the hydroxylated carboxylic acid comprises the hydroxylated carboxylic acid, an ester thereof, a salt thereof, an anhydride thereof, or a combination thereof. A heat transfer system comprises an aluminum component, a magnesium component, or an aluminum component and a magnesium component; and the foregoing heat transfer fluid.
1. A method of transferring heat, comprising:
contacting a heat transfer system comprising an aluminum component, a magnesium component, or an aluminum component and a magnesium component with the heat transfer fluid, the heat transfer fluid comprising:
a hydroxylated carboxylic acid of formula (I):
(OH) x (R 1 )(COOH) y (I),
wherein x is 2 to 10, y is 3 to 10, and R 1 is a C 2-50 aliphatic group, a C 6-50 aromatic group, or a combination thereof; and
wherein the hydroxylated carboxylic acid comprises the hydroxylated carboxylic acid, an ester thereof, a salt thereof, an anhydride thereof, or a combination thereof; and
wherein the heat transfer fluid is free of silicates.
2. The method of claim 1 , wherein the heat transfer fluid comprises about 0.01 to 10 weight percent of the hydroxylated carboxylic acid.
3. A method of transferring heat comprising:
contacting a heat transfer system comprising an aluminum component, a magnesium component, or an aluminum component and a magnesium component with the heat transfer fluid, the heat transfer fluid comprising:
a hydroxylated carboxylic acid of formula (II):
R 2 [R 4 (OH) x (COOH) y-z ][R 3 (COOH) z ] (II),
wherein
R 2 is monovalent,
R 3 has a total valence of 1+z,
R 2 and R 3 are independently a C 1-20 aliphatic group, C 6-20 aromatic group, or a combination thereof,
R 4 has a total valence of 2+x+y-z, and is a C 2-15 aliphatic group, C 6-15 aromatic group, or a combination thereof,
z is 1 to 8, with the proviso that y-z is greater than or equal to 2,
wherein the hydroxylated carboxylic acid comprises the hydroxylated carboxylic acid, an ester thereof, a salt thereof, an anhydride thereof, or a combination thereof; and
wherein the heat transfer fluid is free of silicates.
4. The method of claim 3 , wherein the hydroxylated carboxylic acid is of formula (III):
R 5 [R 7 (OH) x (COOH) y-z ][R 6 (COOH) z ] (III),
wherein
R 5 and [R 6 (COOH) z ] have a total valence of 1, and are independently a C 1-20 aliphatic group selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group, a cycloalkenyl group, and a combination thereof,
[R 7 (OH) x (COOH) y-z ] has a total valence of 2, and is a C 1-15 aliphatic group selected from the group consisting of an alkylene group, an alkenylene group, a cycloalkylene group, a cycloalkenylene group, and a combination thereof.
5. The method of claim 4 , wherein the hydroxylated carboxylic acid is of formula (IV):
CH 3 (CH 2 ) m [R 7 (OH) x (COOH) y-1 ](CH 2 ) n (COOH) (IV),
wherein m and n are independently 0 to 19.
6. The method of claim 2 , wherein m and n are independently 0 to 15.
7. The method of claim 6 , wherein m and n are independently 0 to 10.
8. The method of claim 7 , with the proviso that m+n is less than or equal to 16.
9. The method of claim 5 , wherein the hydroxylated carboxylic acid is selected from the group consisting of:
a hydroxylated carboxylic acid of formula (V):
a hydroxylated carboxylic acid of formula (VI):
and a combination thereof.
10. The method of claim 9 , wherein m and n are independently 0 to 15.
11. The method of claim 10 , wherein m and n are independently 0 to 10, with the proviso that m+n is less than or equal to 16.
12. The method of claim 9 , wherein the anhydride of the hydroxylated carboxylic acid of formula (V) is of formula (XI):
13. The method of claim 1 , wherein the ester of the hydroxylated carboxylic acid is of formula (VII):
(OH) x (R 1 )(COOH) y-p (COOR 8 ) p (VII),
wherein p is 1 to 9, with the proviso that p is less than or equal to y, and R 8 is a C 1-50 hydrocarbyl group.
14. The method of claim 13 , wherein R 8 is of formula (VIII):
wherein s is 0 to 10.
15. The method of claim 1 , wherein the salt of the hydroxylated carboxylic acid is of formula (IX):
(OH) x-q (0M) q (R 1 )(COOH) y-p (COOM) p (IX),
wherein q is 1 to 9, with the proviso that q is less than or equal to x, and M comprises an organic cation, an inorganic cation, or a combination thereof.
16. The method of claim 15 , wherein M comprises an alkali metal cation, an alkaline earth metal cation, a transition metal cation, an ammonium cation, a phosphonium cation, a pyridinium cation, an imidazolinium cation, a pyrazolinium cation, a triazolinium cation, a tetrazolinium cation, or a combination thereof.
17. The method of claim 1 , wherein the anhydride of the hydroxylated carboxylic acid is of formula (X):
wherein v is 2, 4, 6, 8, or 10, with the proviso that v is less than or equal to y.
18. The method of claim 1 , comprising about 0.01 percent by weight to about 10 percent by weight of the hydroxylated carboxylic acid, based on the total weight of the heat transfer fluid.
19. The method of claim 18 , comprising about 0.1 percent by weight to about 5 percent by weight of the hydroxylated carboxylic acid, based on the total weight of the heat transfer fluid.
20. The method of claim 1 , wherein the heat transfer fluid further comprises a monohydric alcohol, a polyhydric alcohol, or a combination thereof.
21. The method of claim 20 , wherein the alcohol is selected from the group consisting of methanol, ethanol, propanol, butanol, furfural, tetrahydrofurfurol, ethoxylated furfural, alkoxy alkanol, ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, dipropylene glycol, butylene glycol, glycerol, glycerol-1,2-dimethyl ether, glycerol-1,3 dimethyl ether, monoethylether of glycerol, sorbitol, 1,2,6-hexanetriol, trimethylol propane, and a combination thereof.
22. The method of claim 1 comprising about 0 to about 99.9 percent by weight of the alcohol, based on the total weight of the heat transfer fluid.
23. The method of claim 1 , comprising about 1 to about 60 percent by weight of the water, based on the total weight of the heat transfer fluid.
24. The method of claim 1 , further comprising a corrosion inhibitor comprising an azole, a siloxane, a colloidal silica, a C 6 to C 14 aliphatic or aromatic mono- or di-carboxylic acid, a C 6 to C 14 aliphatic or aromatic mono- or di-carboxylate, a tall oil fatty acid, a borate, a nitrate, a nitrite, an alkali metal salt thereof, an alkaline earth metal salt thereof, an ammonium salt thereof, an amine salt thereof, or a combination thereof.
25. The method of claim 1 , further comprising an oxy-anion of molybdenum, tungsten, vanadium, phosphorus, antimony, or a combination thereof.
26. The method of claim 1 , further comprising a colorant, an antifoam agent, a wetting agent, a biocide, a bitterant, a dispersant or a combination thereof.