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EP0565265B1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Refrigerant composition

Assignee: Star Refrigeration Ltd
•
Filing: 1993-03-22
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Granted: 1995-12-13
•
Expires: 2013-03-22
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Abstract

Abstract The invention provides a refrigerant composition for use as a direct replacement for the environmentally unacceptable refrigerant R12 (dichlorodifluoromethane) in refrigeration apparatus. The composition comprises a mixture of R134a (tetrafluoroethane), a hydrocarbon which is propane, propylene or isobutane in a non-flammable amount, and optionally R218 (octafluoropropane). The hydrocarbon is usually present in an amount of 2 to 10% by weight, and the R218 is usually present as 3 to 20% by weight. An extreme pressure anti-wear additive, such as a triaryl phosphate, may also be included. The composition contains no chlorine and has no ozone-depleting potential.

Inventors

  • 👤 Stephen Forbes Pearson

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 14:43
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C09K2205/00; C09K2205/10; C09K2205/12; C09K2205/128; C09K2205/40; C09K2205/42

Claims Analysis

Total Claims: 16
Claim 1
Independent Claim 33 words
A refrigerant composition which comprises R134a (tetrafluoroethane), R218 (octafluoropropane), and a hydrocarbon which is propane, propylene or isobutane; the hydrocarbon being present in a non-flammable proportion of up to 10 % by weight.
Claim 2
Dependent Claim 11 words
A composition according to claim 1 wherein the hydrocarbon is propane.
Claim 3
Dependent Claim 11 words
A composition according to claim 1 wherein the hydrocarbon is propylene.
Claim 4
Dependent Claim 11 words
A composition according to claim 1 wherein the hydrocarbon is isobutane.
Claim 5
Dependent Claim 24 words
A composition according to any preceding claim wherein the hydrocarbon is present in a non-flammable proportion in the range 2 to 10% by weight.
Claim 6
Dependent Claim 21 words
A composition according to any preceding claim wherein the R218 is present in an amount of 3 to 20% by weight.
Claim 7
Dependent Claim 20 words
A composition according to claim 6 wherein the R218 is present in an amount of 5 to 9% by weight.
Claim 8
Dependent Claim 20 words
A composition according to claim 1 which comprises by weight; propane up to 3% R218 up to 6% R134a balance.
Claim 9
Dependent Claim 20 words
A composition according to claim 1 which comprises by weight; propane up to 4% R218 up to 7% R134a balance.
Claim 10
Dependent Claim 20 words
A composition according to claim 1 which comprises by weight; propane up to 5% R218 up to 9% R134a balance
Claim 11
Dependent Claim 18 words
A composition according to claim 1 which comprises by weight: propane substantially 5% R218 substantially 9% R134a balance.
Claim 12
Dependent Claim 16 words
A composition according to any preceding claim which further comprises an extreme pressure anti-wear lubricant additive.
Claim 13
Dependent Claim 23 words
A composition according to claim 12 wherein the additive is present in an amount of 0.3 to 5 wt % of the composition.
Claim 14
Dependent Claim 15 words
A composition according to claim 12 or 13 wherein the additive is a triaryl phosphate.
Claim 15
Independent Claim 19 words
A method of conducting vapour-compression refrigeration which comprises compressing and expanding a refrigerant composition according to any preceding claim.
Claim 16
Dependent Claim 17 words
A refrigeration apparatus which employs as refrigerant a composition according to any of claims 1 to 14.

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