Hydrocarbon additives for 1234yf composition and methods for their production, storage and usage
AssigneeThe Chemours Company Fc, LLC
InventorsSHENG PENG, BARBARA HAVILAND MINOR
Life of this patent
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Abstract
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.
Claims25
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 (N2/O2>78/21 ratio), O2, N2, Ar, CO2, CH4, 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.
A composition comprising:
- (i) at least HFO-1234yf and HFO-1234ze;
- (ii) at least one C1 and/or C2 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), C3-C4 hydrocarbon, and combinations thereof;
- and,
- (iv) optionally, at least one additional HFO, HFO, HCFO, HFC different from (ii), HCC, HCFC, nitrogen, and air component.
8-9. (canceled)
15-16. (canceled)
20-23. (canceled)
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.
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), C3-C4 hydrocarbon, and combinations thereof.
29-31. (canceled)
Dependencies are inferred from the claim text.