US5866030A
Expired / Lapsed
US
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Enhanced hydrocarbon lubricants for use with immiscible refrigerants
Assignee: Witco Corp
•
Filing: 1997-07-21
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Granted: 1999-02-02
•
Expires: 2017-07-21
Abstract
Abstract Fluid refrigeration compositions comprising a hydrocarbon lubricant, an immiscible refrigerant and an additive capable of reducing the interfacial tension between the hydrocarbon lubricant and refrigerant.
Inventors
- 👤 Jose L. Reyes-Gavilan
- 👤 Alan D. Eckard
- 👤 G. Thomas Flak
- 👤 Todd R. Tritcak
- 👤 Leonard Aconsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:59
CPC Classifications
C; C10; C10M; C10M131/00; C10M131/08; C10M131/12; C10M129/00; C10M129/02; C10M129/04; C10M129/06; C10M129/08; C10M131/02; C10M131/10; C10M169/00; C10M169/04; C10M171/00; C10M171/008; C10M2203/00; C10M2203/06; C10M2203/065; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2205/00; C10M2205/02; C10M2205/0206; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/2835; C10M2207/286; C10M2207/30; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/04; C10M2211/044; C10M2211/06; C10M2219/00; C10M2219/04; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/085; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/043
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
121 words
A fluid refrigeration composition comprising a mixture of hydrocarbon lubricant(s) and polyol ester lubricant(s) in a weight ratio of polyol ester to hydrocarbon lubricant(s) from about 1:99 to 1:3, a fluorohydrocarbon refrigerant immiscible with the hydrocarbon lubricant(s) which contains at least one carbon atom and all the halogen groups of the fluorohydrocarbon are fluorine, and an effective amount of additive which reduces the interfacial tension at the interface between the hydrocarbon lubricant and refrigerant in liquid form to the point where the spreading coefficient(s) refrigerant liquid on steel is slightly positive enabling the refrigerant to displace hydrocarbon lubricant from steel wherein said additive is present in a concentration of 0.001 to 5 parts by weight per 100 parts by weight lubricant.
Claim 2
Dependent Claim
121 words
A fluid refrigeration composition comprising a mixture of hydrocarbon lubricant(s) and polyol ester lubricant(s) in a weight ratio of polyol ester to hydrocarbon lubricant(s) from about 1:99 to 1:3, a fluorohydrocarbon refrigerant immiscible with the hydrocarbon lubricant(s) which contains at least one carbon atom and all the halogen groups of the fluorohydrocarbon are fluorine, and an effective amount of additive which reduces the interfacial tension at the interface between the hydrocarbon lubricant and refrigerant in liquid form to the point where the spreading coefficient(s) refrigerant liquid on steel is slightly positive enabling the refrigerant to displace hydrocarbon lubricant from steel wherein said additive is present in a concentration of 0.001 to 5 parts by weight per 100 parts by weight lubricant.
Claim 3
Dependent Claim
14 words
The composition of claim 1, wherein the hydrocarbon lubricant comprises a paraffinic mineral oil.
Claim 4
Dependent Claim
13 words
The composition of claim 1, wherein the hydrocarbon lubricant comprises a naphthenic oil.
Claim 5
Dependent Claim
13 words
The composition of claim 1, wherein the hydrocarbon lubricant comprises an alkylbenzene oil.
Claim 6
Dependent Claim
12 words
The composition of claim 1, wherein the hydrocarbon lubricant comprises a polyalphaolefin.
Claim 7
Dependent Claim
25 words
The composition of claim 1, wherein the hydrocarbon lubricant comprises a major amount of naphthenic mineral oil and a minor amount of an alkylbenzene oil.
Claim 8
Dependent Claim
15 words
The composition of claim 1, wherein the hydrocarbon lubricant consists of a paraffinic mineral oil.
Claim 9
Dependent Claim
10 words
The composition of claim 1, wherein the fluorohydrocarbon comprises 1,1,1,2-tetrafluoroethane.
Claim 10
Dependent Claim
10 words
The composition of claim 1, wherein the fluorohydrocarbon comprises pentafluoroethane.
Claim 11
Dependent Claim
11 words
The composition of claim 1, wherein said composition also comprises difluoromonochloromethane.
Claim 12
Dependent Claim
11 words
The composition of claim 1, wherein the additive comprises a surfactant.
Claim 13
Dependent Claim
10 words
The composition of claim 11, wherein the surfactant comprises 2,4,7,9-tetramethyl-5-decyne-4,7-diol.
Claim 14
Dependent Claim
18 words
The composition of claim 1 wherein said lubricant is a mixture of hydrocarbon lubricant and a polyol ester.
Claim 15
Dependent Claim
11 words
The composition of claim 11, wherein the surfactant comprises a fluoroester.
Claim 16
Dependent Claim
12 words
The composition of claim 11, wherein the surfactant comprises an anionic fluorohydrocarbon.
Claim 17
Dependent Claim
24 words
The composition of claim 1, wherein the refrigerant is immiscible over the whole temperature range of -40° C. to 80° C. with the lubricant.
Claim 18
Independent Claim
26 words
A method of retrofitting a compressor system which comprises the step of adding a concentrate comprising a polyol ester lubricant and 2,4,7,9-tetramethyl-5-decyne-4,7-diol to the compressor system.
Claim 19
Independent Claim
26 words
A method of retrofitting a compressor system which comprises the step of adding a concentrate comprising a polyol ester lubricant and 2,4,7,9-tetramethyl-5-decyne-4,7-diol to the compressor system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-02-01 | 2002-08-03 | 2003-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-01 | 2006-08-03 | 2007-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-01 | 2010-08-03 | 2011-02-02 | $7700.00 | Window Closed / Lapsed |