COMPOSITIONS COMPRISING 2,3,3,3-TETRAFLUOROPROPENE AND OXIDATION PRODUCTS
Disclosed are compositions comprising HFO-1234yf, an inhibitor and oxidation products derived from the inhibitor. Such compositions are useful, among other uses, as heat transfer compositions for use in refrigeration, air-conditioning and heat pump systems.
1 . A composition comprising 2,3,3,3-tetrafluoropropene, a terpene inhibitor and one or more oxidation products, wherein the oxidation product is an oxidation product of a terpene inhibitor, wherein the terpene inhibitor is chosen from one or more of limonene, α-terpinene, α-pinene and β-pinene.
2 . (canceled)
3 . A The composition of claim 1 wherein the oxidation product is chosen from one or more of carvone, carveol, 3-isopropyl-6-methyl-7-oxabicyclo[4.1.0]hept-2-ene, 6-isopropyl-3-methyl-7oxabicyclo[4.1.0]hept-2-ene, 1-isopropyl-4-methyl-cyclohex-2-ene-1,4-diol, E-3-isopropyl-6-methylhepta-2,6-dienal, p-cymene, pinocarveol, myrtenol, and propane.
4 . The composition of claim 1 wherein the inhibitor is limonene, and the oxidation product may be at least one of carvone, carveol and limonene oxide.
5 . The composition of claim 1 wherein the inhibitor is α-terpinene, and the oxidation product may be at least one of 3-isopropyl-6-methyl-7-oxabicyclo[4.1.0]hept-2-ene, 6-isopropyl-3-methyl-7oxabicyclo[4.1.0]hept-2-ene, 1-isopropyl-4-methyl-cyclohex-2-ene-1,4-diol, E-3-isopropyl-6-methylhepta-2,6-dienal, p-cymene and propane.
6 . The composition of claim 1 wherein the inhibitor is α-pinene and the oxidation product is α-pinene oxide.
7 . The composition of claim 1 wherein the inhibitor is β-pinene and the oxidation product is at least one of pinocarveol and myrtenol.
8 . The composition, claim 1 wherein the composition further comprises an additional compound chosen from at least one of HCC-40, CFC-12, HFC-23, HFC-134a, HFC-143a, HFC-152a, HCFC-225ca, HCFC-225cb, HCFC-244bb, HFC-245cb, HFC-254eb, HFC-263fb, HFO-1123, HFO-1243zf, HFO-1225ye (E- and/or Z-isomer), HFO-1225zc, HFO-1234ze (E- and/or Z-isomer), 3,3,3-trifluoro-1-propyne, HCFO-1233xf, HCFO-1122, HCO-1140, HCFO-1131 (E- and/or Z-isomer), HCFO-1131a, HCFC-124, HCFC-124a, and HCFC-142b.
9 . The composition of, claim 1 wherein the composition further comprises an additional compound chosen from at least one of CHF(CF 3 )CH 2 CH═CF(CF 3 ), CHF(CF 3 )CH═CHCHF(CF 3 ), CF(CF 3 )═CHCH 2 CF(CF 3 )CH 2 CHF(CF 3 ), CF 3 C(═O)CH 3 , formaldehyde, acetaldehyde, trioxane and trifluoroacetic acid.
10 . The composition of, claim 1 wherein the composition further comprises an additional compound chosen from at least one of Z-HFO-1336mzz, E-HFO-1336mzz, HFO-1327mz, HCFO-1122, HCFO-1122a, HFO-1123, E-HFO-1233zd, Z-HFO-1224yd, E-HFO-1132, Z-HFO-1132, HFO-1132a, HCFO-1112, HFO-1234zc, HFO-1234ye, and HFO-1234yc.
11 . The composition of, claim 1 wherein the composition further comprises an additional compound chosen from HFC-134a, HFC-244bb, HFC-245cb, HFO-1243zf, HFO-1225ye, HFO-1225zc, HFO-1234ze, 3,3,3-trifluoro-1-propyne, and HCFO-1233xf.
12 . The composition of, claim 1 wherein the terpene inhibitor is present in the composition in an amount of at least 0.001% by weight (10 ppm).
13 . The composition of, claim 1 wherein the terpene inhibitor is present in the composition in an amount of at least 0.01% by weight (100 ppm).
14 . The composition of claim 1 wherein the composition further comprises an additional compound chosen from one or more of HFO-1243zf, HFC-134a, HFC-143a, HCFO-1122, HFC-254eb, HCFC-124 and HFC-23.
15 . The composition of claim 14 wherein the additional compound is a combination of HFO-1243zf, HFC-134a and HFC-143a.
16 . The composition of claim 14 wherein the additional compound is a combination of HFO-1243zf, HFC-134a, HFC-143a, HCFO-1122 and HFC-254eb.
17 . The composition of claim 1 wherein the composition further comprises an additional compound chosen from one or more of HFC-152a, HFO-1234ze(E), HCFO-1131a, HCO-1140, CFC-12, HFC-244bb and HCFO-1233xf.
18 . The composition of claim 1 wherein the composition further comprises an additional compound chosen from one or more of HFO-1225ye(Z), HC-40, HFO-1123 and HFC-263fb.
19 . The composition of claim 7 wherein the total amount of additional compound may be greater than 0 wt % and less than 1 wt %.
20 . The composition of claim 7 wherein the total amount of additional compounds present is greater than 0.1 ppm and less than 0.5 wt % of the total weight of the composition.
21 . The composition of, claim 1 wherein the composition further comprises an additional inhibitor chosen from α-tocopherol, butylated hydroxytoluene, 4-methoxyphenol, and benzene-1,4-diol.
22 . The composition of claim 1 wherein the terpene inhibitor comprises limonene.
23 . The composition of claim 1 wherein the terpene inhibitor comprises α-terpinene.
24 . The composition of claim 1 wherein the terpene inhibitor comprises α-pinene.
25 . The composition of claim 1 wherein the terpene inhibitor comprises β-pinene.
26 - 31 . (canceled)
32 . A process for heat transfer comprising transporting a composition comprising the composition of claim 1 from a heat source to a heat sink.
33 - 35 . (canceled)
36 . A heat transfer system comprising a composition comprising 2,3,3,3-tetrafluoropropene, a terpene inhibitor and one or more oxidation products, wherein the oxidation product is an oxidation product of a terpene inhibitor.
37 . The system of claim 36 wherein the heat transfer system is a stationary system chosen from a refrigeration, air-conditioning or heat pump apparatus.
38 . The heat transfer system of claim 36 , wherein the heat transfer system is a mobile system which is a mobile air-conditioning system.