It is provided an ester for a refrigerator oil and of mixed alcohols and mixed monocarboxylic acids. The mixed alcohols include dipentaerythritol and tripentaerythritol in a mass ratio of 90/10 to 99.7/0.3, and the mixed monocarboxylic acids include n-pentanoic acid and 2-methyl butanoic acid in a mass ratio of 50/50 to 80/20. The ester has a kinematic viscosity of 50 to 150 mm.sup.2/s at 40° C.

Disclosed are methods for providing heating and/or cooling of the type comprising evaporating refrigerant liquid and condensing refrigerant vapor in a plurality of repeating cycles, where the method comprises (a) providing the refrigerant comprising at least about 5% by weight of a lower alkyl iodofluorocarbon; and (b) exposing at least a portion of said refrigerant in at least a portion of said plurality of said cycles to a sequestration material comprising: i) copper or a copper alloy; ii) a molecular sieve (preferably a zeolite), comprising copper, silver, lead or a combination thereof; iii) an anion exchange resin, and iv) a combination of two or more of these, wherein said exposing temperature is preferably above about 20 C.

An object of the present invention is to provide a novel azeoropic or azeotrope-like composition that is effective for the separation of HF from 1,1,2-trichloroethane (HCC-140), trans-1,2-dichloroethylene (HCO-1130(E)), or cis-1,2-dichloroethylene (HCO-1130(Z)). The object can be achieved by an azeotropic or azeotrope-like composition comprising HCC-140, HCO-1130(E), or HCO-1130(Z), and hydrogen fluoride.

The present disclosure provides minimum-boiling, homogeneous azeotropic and azeotrope-like compositions of 1,2,2-trifluoro-1-trifluoromethylcyclobutane (“TFMCB”) with each of ethanol, n-pentane, cyclopentane, trans-1,2-dichloroethylene, and perfluoro(2-methyl-3-pentanone).

Provided are a heat source machine and an operation method of the same that employ predetermined solutions by using a predetermined refrigerating machine oil that can suppress deterioration of the refrigerating machine oil and viscosity reduction when a refrigerant is dissolved in the refrigerating machine oil. In the heat source machine (10) of the present disclosure, a compressor (11), a condenser (12), an expansion valve (13), and an evaporator (14) are connected to each other via main pipes (L.sub.1 to L.sub.8) to form a refrigerant circulation circuit configured to circulate a refrigerant, and the refrigerant circulation circuit is filled with HFO-1336mzz (Z) as a refrigerant. The heat source machine includes a refrigerating machine oil supply unit (15) configured to supply a refrigerating machine oil to the compressor (11), the refrigerating machine oil supply unit (15) includes a storage unit (15a) storing the refrigerating machine oil, the refrigerating machine oil includes an ester-based base oil having a dynamic viscosity of 100 mm.sup.2/s to 180 mm.sup.2/s at 40 C. and an epoxy-based acid scavenger at a mass of 0.1% by mass to 6% by mass with respect to a total mass of the refrigerating machine oil, and the machine design temperature is 130 C. or higher and 225 C. or lower.

This invention relates to compositions comprising 1,2-dichloro-1,2-difluoroethylene (i.e., CFO-1112) and an additional component. The compositions described herein may be useful, for example, in heat transfer applications.

Disclosed are methods for providing heating and/or cooling of the type comprising evaporating refrigerant liquid and condensing refrigerant vapor in a plurality of repeating cycles, where the method comprises (a) providing the refrigerant comprising at least about 5% by weight of a lower alkyl iodofluorocarbon; and (b) exposing at least a portion of said refrigerant in at least a portion of said plurality of said cycles to a sequestration material comprising: i) copper or a copper alloy; ii) a molecular sieve (preferably a zeolite), comprising copper, silver, lead or a combination thereof; iii) an anion exchange resin, and iv) a combination of two or more of these, wherein said exposing temperature is preferably above about 20 C.

A hydrohaloolefin composition includes a hydrohaloolefin as a main component, further includes 1,1,2,3-tetrafluorobutane, in which a content of the 1,1,2,3-tetrafluorobutane is 0.001 to 0.1% by mass with respect to a total amount of organic compounds.

The present application relates to azeotrope and azeotrope-like compositions comprising neopentane and a compound selected from E-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz(E)) and Z-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz(Z)). Methods of using the compositions of the invention in propellant applications, heat transfer applications, and refrigeration applications are also provided.

The present disclosure provides minimum-boiling, homogeneous azeotropic and azeotrope-like compositions of 1,2,2-trifluoro-1-trifluoromethylcyclobutane (“TFMCB”) with each of ethanol, n-pentane, cyclopentane, trans-1,2-dichloroethylene, and perfluoro(2-methyl-3-pentanone).