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US3715302A Expired / Lapsed US ⏱️ 0.0 years remaining

Refrigeration oil composition having wide boiling range

Assignee: Sunoco Inc
•
Filing: 1970-08-12
•
Granted: 1973-02-06
•
Expires: 1990-08-12
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Abstract

Abstract A wide boiling range e.g., for a given VGC) refrigeration oil, having good chemical and thermal stability and good miscibility with fluorinated hydrocarbon refrigerants, comprises a blend of from 50-75 volume percent of hydrorefined naphthenic oil component and 50-25 volume percent of solvent refined and dewaxed paraffinic oil component. Preferably, the hydrorefined naphthenic oil component (which can be a blend of two or more hydrorefined oils) has an SUS viscosity at 100* F. in the range of 75-750 SUS and the paraffinic oil component (which can be a blend) is chosen so that the resulting naphthenic paraffinic blend has a viscosity at 100* F. in the range of 100-500 SUS (preferably 125-300 SUS, typically 150-250 SUS) and has a maximum natural floc point of 35* F. Preferably the blend contains less than 10 ppm (more preferably less than 5) of basic nitrogen and contains in the range of 15-35 weight percent aromatics.

Inventors

  • 👤 I Mills
  • 👤 J Melchiore

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 06:34
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C10; C10M; C10M171/00; C10M171/007; C10M171/008; C10M2203/00; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2205/028

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 65 words
A composition, useful as a refrigerator oil, comprising a blend of from 50-75 volume percent of a hydrorefined naphthenic oil and from 50-25 percent of a dewaxed paraffinic oil, said blend containing in the range of 15-35 weight percent aromatics, having an SUS viscosity at 100* F. in the range of 100-500 and a natural floc point no higher than -35* F. in CCl2F2 refrigerant.
Claim 2
Dependent Claim 65 words
A composition, useful as a refrigerator oil, comprising a blend of from 50-75 volume percent of a hydrorefined naphthenic oil and from 50-25 percent of a dewaxed paraffinic oil, said blend containing in the range of 15-35 weight percent aromatics, having an SUS viscosity at 100* F. in the range of 100-500 and a natural floc point no higher than -35* F. in CCl2F2 refrigerant.
Claim 3
Dependent Claim 16 words
The composition of claim 1 and having a basic nitrogen content no greater than 10 ppm.
Claim 4
Dependent Claim 34 words
The composition of claim 2 wherein no greater than 2.5 Wt. CHClF2 is determined after 14-days of sealed tube stability testing at 347* F. with CCl2F2 refrigerant in the presence of a steel strip.
Claim 5
Dependent Claim 23 words
The composition of claim 1 and having better thermal stability thaN a naphthenic refrigeration oil of about the same viscosity at 100* F.
Claim 6
Dependent Claim 44 words
The composition of claim 4 and which, compared with said naphthenic refrigeration oil, produces significantly less coke deposit on throttle valves when used for about 2,000 hours in a compressor which is operated at an average coil temperature in the range of 140*-170* F.
Claim 7
Dependent Claim 47 words
The composition of claim 5 wherein the basic nitrogen content is less than 5 ppm and wherein no greater than 1.0 Wt. percent of CHClF2 is determined after 14-days of sealed tube stability testing at 347* F. with CCl2F2 refrigerant in the presence of a steel strip.
Claim 8
Dependent Claim 46 words
A composition according to claim 1 wherein said hydrorefined naphthenic oil has a viscosity at 100* F. in the range of 100-750 SUS and wherein at least 50 volume percent of said dewaxed paraffinic oil distills above 900* F., the distillation being corrected to one atmosphere.
Claim 9
Dependent Claim 19 words
A composition according to claim 7 and having a viscosity at 100* F. in the range of 125-300 SUS.

References Cited (Backward Citations)

US3145161A Cited
US3224955A Cited
US3196102A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-02-06 1976-08-07 1977-02-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-02-06 1980-08-07 1981-02-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-02-06 1984-08-07 1985-02-06 $7700.00 Window Closed / Lapsed

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