Refrigerant compositions
Refrigerant compositions are disclosed which comprise: (a) pentafluoroethane, octafluoropropane, trifluoromethoxydifluoromethane or hexafluoro-cyclopropane, or a mixture of two or more thereof, in an amount of at least about 35% based on the weight of the composition, (b) 1,1,1,2- or 1,1,2,2-tetrafluoroethane, 1,1-difluoroethane, trifluoromethoxypentafluoroethane, 1,1,1,2,3,3-heptafluoropropane or a mixture of two or more thereof, in an amount of at least about 30% by weight based on the weight of the composition and (c) n-butane, in an amount from about 2.3 to about 4% by weight based on the weight of the composition.
1. A refrigerant composition consisting of:
(a) 1,1,1, 2 tetrafluoroethane in an amount from about 30 to 50% based on the weight of the composition,
(b) n-butane in an amount from 1 to 4 % by weight based on the weight of the composition, with the remainder, not exceeding 60% by weight based on the weight of the composition, being:
(c) pentafluoroethane.
2. A composition according to claim 1 in which component (b) is present in an amount from about 2.3 to 3.5% by weight based on the weight of the composition.
3. A composition according to claim 2 in which component (c) is present in an amount from 35 to 60% by weight based on the weight of the composition.
4. A composition according to claim 3 in which component (c) is present in an amount from 47.5 to 55% by weight based on the weight of the composition.
5. A composition according to claim 1 in which (c) is pentafluoroethane in an amount of about 46.5% by weight, (a) is 1,1,1,2-tetrafluoroethane in an amount of about 50% by weight and (b) n-butane in an amount of about 3.5% by weight.
6. The process for producing refrigeration which comprises condensing a composition as claimed in claim 1 and thereafter evaporating the composition in the vicinity of a body to be cooled.
7. A refrigeration apparatus containing, as refrigerant, a composition as claimed in claim 1 .
8. A refrigerant composition consisting of:
(a) 1,1,1,2-tetrafluoroethane in an amount from about 30 to 50% based on the weight of the composition.
(b) n-butane in an amount from 1 to 4% by weight based on the weight of the composition, with the remainder, not exceeding 60% by weight based on the weight of the composition, being;
(c) pentafluoroethane; and
(d) a lubricant.
9. A composition according to claim 8 , wherein (c) is pentafluoroethane in an amount of about 46.5% by weight, (a) is 1,1,1,2-tetrafluoroethane in an amount of about 50% by weight, and (b) is n-butane in an amount of about 3.5% by weight.
10. A composition according to claim 8 , wherein the lubricant is selected from the group consisting of minerals oils and alkyl benzene.
11. The process for producing refrigeration which comprises condensing a composition as claimed in claim 8 and thereafter evaporating the composition in the vicinity of a body to be cooled.
12. A refrigeration apparatus containing, as refrigerant, a composition as claimed in claim 8 .