HYDROCARBON ADDITIVES FOR 1234YF COMPOSITION AND METHODS FOR THEIR PRODUCTION, STORAGE AND USAGE
The present invention relates to compositions comprising at least one fluoroolefin and an effective amount of at least one inhibitor. The stabilized compositions may be useful in cooling apparatus, such as refrigeration, air-conditioning, chillers, and heat pumps, as well as in applications as foam blowing agents, solvents, aerosol propellants, fire extinguishants, and sterilants.
1 . A composition comprising at least one fluoroolefin comprising:
a. HFO-1234yf;
b. an effective amount of at least one oligomerization/homopolymerization inhibitor; and one of:
i. at least one or more of the following gases: air (N2/O2 78/21 ratio), air (N 2 /O2>78/21 ratio), O2, N2, Ar, CO 2 , CH 4 , He.
ii. 1243zf, 1140, 1125zc, 1234ze, trifluoropropyne, 225ca, 225cb, 227ea, 152a; and
iii. at least one or more of the following components: 1234ze, 1243zf, Z-1336mzz, E-1336mzz, 1327mz, 1122, 1122a, 1123, 1233zd, 1224 yd, E-1132, Z-1132, 1132a, 1112, E-1225ye, Z-1225ye, 1234zc, 1234ye, 1234yc, 1225zc, and 152a,
wherein the composition is substantially free of oligomeric, homopolymer or other polymeric products derived from the fluoroolefin.
2 . A composition comprising:
(i) at least HFO-1234yf and HFO-1234ze;
(ii) at least one C 1 and/or C 2 hydrofluorocarbon, and optionally carbon dioxide;
(iii) an effective stabilizing amount of at least one oligomerization/homopolymerization inhibitor comprising: one or more of a xylene, one of alpha (α)-methyl styrene, 2-methyl-alpha-methylstyrene (α, 2-dimethylstyrene), 3-methyl-alpha-methylstyrene (α, 3-dimethylstyrene), and 4-methyl-alpha-methylstyrene (α, 4-dimethylstyrene), C 3 -C 4 hydrocarbon, and combinations thereof; and,
(iv) optionally, at least one additional HFO, HFO, HCFO, HFC different from (ii), HCC, HCFC, nitrogen, and air component.
3 . The composition of claim 1 further comprising at least one member selected from the group consisting of air, oxygen, cumene hydroperoxide, and fluoroolefin polyperoxides, peroxides, hydroperoxides, persulfates, percarbonates, perborates and hydropersulfates.
4 . The composition of claim 1 wherein the inhibitor comprises limonene, pinene, meta-, ortho- and para-xylene, alpha (α)-methyl styrene, 2-methyl-alpha-methylstyrene (α, 2-dimethylstyrene), 3-methyl-alpha-methylstyrene (α, 3-dimethylstyrene), and 4-methyl-alpha-methylstyrene (α, 4-dimethylstyrene), propane, cyclopropane, propylene, butane, butene, isobutene and mixtures of two or more.
5 . The composition as in claim 1 further comprising at least one lubricant.
6 . The composition of claim 1 wherein the fluoroolefin comprises at least one member of HFO-1234yf and HFO-1234ze.
7 . The composition of claim 6 further comprising:
at least one member selected from the group consisting of HFC-32, HFC-125, HFC-134a, HFC-134, HFC-152a, 236fa, HFC-227ea and carbon dioxide; or
at least one member selected from the group consisting of HFC-134a, HFO-1243zf, HFO1225ye, HFO-1234ze, 3,3,3-trifluoro-1-propyne, HCFO-1233xf, HFC-244bb and HFC-245cb; or
at least one member selected from the group consisting of HCC-40, HCFC-22, CFC-115, HCFC-124, HCFC-1122, and CFC-113; or
at least one member selected from the group consisting of HFO-1225yeZ, HFO-1243zf, HFO-1234ze, HFC-236ea, HFC-245fa, and 3,3,3-trifluoropropyne.
8 - 9 . (canceled)
10 . The composition of claim 4 wherein the oligomer inhibitor is present in an amount of about 30 to about 5,000 ppm.
11 . The composition of claim 4 further comprising at least one antioxidant member selected from the group consisting of butylated hydroxytoluene, butylated hydroxyanisole, tertiary-butylhydroquinone, gallate, 2-phenyl-2-propanol, 1-(2,4,5-trihydroxyphenyl)-1-butaone, phenolics, bisphenol methane derivatives, and 2,2′-methylene bis (4-methyl-6-t-butyl phenol).
12 . The composition of claim 6 wherein the oligomer inhibitor comprises at least one of meta-, ortho- and para-xylene.
13 . The composition of claim 1 wherein the inhibitor comprises a liquid.
14 . The composition of claim 1 further comprising at least one antioxidant.
15 - 16 . (canceled)
17 . The composition of claim 1 wherein the composition is substantially free of at least one of ammonia and CF 3 I.
18 . The composition of claim 1 wherein the composition consists essentially of HFO-1234yf and at least one of meta-, ortho- and para-xylene.
19 . The composition of claim 1 wherein the composition consists essentially of HFO-1234yf, 3,3,3-trifluoropropyne and at least one of meta-, ortho- and para-xylene.
20 - 23 . (canceled)
24 . A stabilized HFO-1234yf and 1234ze blend comprising one of meta-, ortho- or para-xylene, one of alpha (α)-methyl styrene, 2-methyl-alpha-methylstyrene (α, 2-dimethylstyrene), 3-methyl-alpha-methylstyrene (α, 3-dimethylstyrene), and 4-methyl-alpha-methylstyrene (α, 4) dimethylstyrene), propane, cyclopropane, propylene, butane, butene, isobutane, isobutene, in an amount effective to inhibit oligomerization of HFO-1234yf without affecting performance or compatibility of the stabilized blend, even when combined with refrigerant oils and other conventional additives.
25 . The blend of claim 24 , comprising:
from about 20 to about 40 weight percent HFO-1234yf; or
from about 28 to about 32 weight percent HFO-1234yf; or
from about 30 to about 32 weight percent HFO-1234yf; or
from about 62 to about 65 weight percent HFO-1234yf; or
from about 76 to about 80 weight percent HFO-1234yf.
26 . The blend of claim 24 , comprising up to 0.5 wt. % of a meta-, ortho- or para-xylene, alpha (α)-methyl styrene, 2-methyl-alpha-methylstyrene (α, 2-dimethylstyrene), 3-methyl-alpha-methylstyrene (α, 3-dimethylstyrene), and 4-methyl-alpha-methylstyrene (α, 4) dimethylstyrene), propane, cyclopropane, propylene, butane, butene, isobutane, isobutene, and mixtures of two or more oligomer inhibitor.
27 . The blend of claim 25 comprising between 0.01 and 0.3 weight percent of the oligomer inhibitor comprises meta-xylene, one of alpha (α)-methyl styrene, 2-methyl-alpha-methylstyrene (α, 2-dimethylstyrene), 3-methyl-alpha-methylstyrene (α, 3-dimethylstyrene), and 4-methyl-alpha-methylstyrene (α, 4-dimethylstyrene), propane, or cyclopropane.
28 . A composition comprising:
(i) about 99.5 weight percent of HFO-1234yf or HFO-1234ze;
(ii) at least one additional refrigerant component comprising HFO, HFO, HCFO, HFC, HCFC, nitrogen, and carbon dioxide; and
(iii) an effective stabilizing amount of at least one oligomerization inhibitor comprising: one or more of a limonene, pinene, xylene, alpha (α)-methyl styrene, 2-methyl-alpha-methylstyrene (α, 2-dimethylstyrene), 3-methyl-alpha-methylstyrene (α, 3-dimethylstyrene), and 4-methyl-alpha-methylstyrene (α, 4-dimethylstyrene), C 3 -C 4 hydrocarbon, and combinations thereof.
29 - 31 . (canceled)
32 . The composition as in claim 1 which comprises a pair of inhibitors selected from d-limonene/propane, l-limonene/propane, β-pinene/propane, α-pinene/propane, α-terpinene/propane, β-terpinene/propane, γ-terpinene/propane, and δ-terpinene/propane, d-limonene/cyclopropane, l-limonene/cyclopropane, β-pinene/cyclopropane, α-pinene/cyclopropane, α-terpinene/cyclopropane, β-terpinene/cyclopropane, γ-terpinene/cyclopropane, and δ-terpinene//cyclopropane, d-limonene/butane, l-limonene/butane, β-pinene/butane, α-pinene/propane, α-terpinene/butane, β-terpinene/butane, γ-terpinene/butane, and δ-terpinene/butane, d-limonene/isobutane, l-limonene/isobutane, β-pinene/isobutane, α-pinene/isobutane, α-terpinene/isobutane, β-terpinene/isobutane, γ-terpinene/isobutane, and δ-terpinene//isobutane, d-limonene/butene, l-limonene/butene, β-pinene/butene, α-pinene/butene, α-terpinene/butene, β-terpinene/butene, γ-terpinene/butene, or δ-terpinene/butene in amounts up to 0.5 wt. %.