# US 10,246,621 B2 · Heat transfer methods, systems and compositions

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- Number: US 10,246,621 B2
- Document ID: US10246621B2
- Status: Granted
- Kind: B2
- Application number: 15/661,980
- Filed: 2017-07-27
- Published: 2017-11-09
- Granted: 2019-04-02
- Earliest claimed: 2016-07-29
- Assignees: Honeywell International Inc.
- Applicants: Honeywell International Inc.
- Inventors: Ankit Sethi; Samuel F. Yana Motta; Gustavo Pottker; Gregory Laurence Smith; Elizabet del Carmen Vera Becerra; Yang Zou; Joshua Close
- Web page: https://patentgrep.com/patent/US10246621B2

## CPC

- C09K 5/044: {comprising halogenated compounds}
- C09K 5/045: {containing only fluorine as halogen}
- C10M 105/38: of polyhydroxy compounds
- C10M 105/50: containing halogen
- C10M 111/02: at least one of them being a non-macromolecular organic compound
- C10M 171/008: {Lubricant compositions compatible with refrigerants}
- F25B 31/002: {Lubrication}
- F25B 45/00: Arrangements for charging or discharging refrigerant
- C09K 2205/122: Halogenated hydrocarbons
- C09K 2205/22: All components of a mixture being fluoro compounds
- C10M 2203/024: unsaturated
- C10M 2203/06: Well-defined aromatic compounds
- C10M 2203/10: Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M 2207/2835: used as base material
- C10M 2211/0206: used as base material
- C10M 2211/022: aliphatic
- C10M 2215/202: containing nitro groups
- C10M 2215/204: containing nitroso groups
- C10M 2223/041: Triaryl phosphates
- C10M 2223/049: Phosphite
- C10N 2020/101: {Containing Hydrofluorocarbons}
- C10N 2020/103: {Containing Hydrocarbons}
- C10N 2030/08: Resistance to extreme temperature
- C10N 2040/30: Refrigerators lubricants {or compressors lubricants}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

The present invention relates to a refrigerant composition, including difluoromethane (HFC-32), pentafluoroethane (HFC-125), and trifluoroiodomethane (CF3I) for use in a heat exchange system, including air conditioning and refrigeration applications and in particular aspects to the use of such compositions as a replacement of the refrigerant R-410A for heating and cooling applications and to retrofitting heat exchange systems, including systems designed for use with R-410A.

## Claims

### Claim 1

A refrigerant blend consisting of:
about 50% by weight difluoromethane (HFC-32),
about 11.5% by weight pentafluoroethane (HFC-125), and
about 38.5% by weight trifluoroiodomethane (CF3I),
wherein the percentages are based on the total weight of the three compounds in the blend.

### Claim 2 (depends on 1)

A heat transfer composition comprising a refrigerant according to claim 1.

### Claim 3 (depends on 2)

The heat transfer composition as claimed in claim 2, wherein the refrigerant comprises greater than 70% by weight of the heat transfer composition.

### Claim 4 (depends on 3)

The heat transfer composition of claim 3 further comprising a stabilizer selected from a diene based compound, or a diene based compound and a phosphorous compound, and/or a nitrogen compound and/or a phenol compound.

### Claim 5 (depends on 4)

The heat transfer composition of claim 4 wherein the diene based compound is a terpene selected from the group consisting of terebene, retinal, geraniol, terpinene, delta-3 carene, terpinolene, phellandrene, fenchene, myrcene, farnesene, pinene, nerol, citral, camphor, menthol, limonene, nerolidol, phytol, carnosic acid and vitamin A1, and combinations of two or more of these.

### Claim 6 (depends on 4)

The heat transfer composition of claim 4 wherein the stabilizer composition comprises a diene based compound and a phosphorous compound, wherein said phosphorous compound is a phosphite compound selected from diaryl phosphite, dialkyl phosphite, triaryl phosphite and/or trialkyl phosphite and/or a phosphate compound selected from triaryl phosphate, trialkyl phosphate, alkyl mono acid phosphate, aryl diacid phosphate, amine phosphate and combinations of two or more of these.

### Claim 7 (depends on 6)

The heat transfer composition of claim 6 wherein the phosphorous compound is a phosphite compound selected from the group consisting of hindered phosphites, tris-(di-tert-butylphenyl)phosphite, di-n-octyl phophite, iso-decyl diphenyl phosphite and diphenyl phosphite.

### Claim 8 (depends on 7)

The heat transfer composition of claim 7 wherein the stabilizer composition comprises farnesene and diphenyl phosphite.

### Claim 9 (depends on 7)

The heat transfer composition of claim 7 further comprising a nitrogen compound selected from dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, and TEMPO [(2,2,6,6-tetramethylpiperidin-1-yl)oxyl], and combinations of two or more of these.

### Claim 10 (depends on 4)

The heat transfer composition of claim 4 wherein the stabilizer composition comprises BHT in an amount of from about 0.001% by weight to about 5% by weight of the heat transfer composition.

### Claim 11 (depends on 10)

The heat transfer composition of claim 10 wherein the stabilizer composition comprises farnesene, diphenyl phosphite and BHT.

### Claim 12 (depends on 2)

The heat transfer composition of claim 2 further comprising a polyol ester (POE) lubricant.

### Claim 13 (depends on 2)

The heat transfer composition of claim 2 wherein said refrigerant has a Global Warming Potential (GWP) of not greater than 750.

### Claim 14 (depends on 1)

A method of cooling in a heat transfer system comprising an evaporator, a condenser and a compressor, the method comprising i) condensing a refrigerant blend according to claim 1, and ii) evaporating the blend in the vicinity of a body or article to be cooled;
wherein the evaporator temperature of the heat transfer system is in the range of from about −40° C. to about −10° C.

### Claim 15 (depends on 14)

The method of claim 14 wherein the heat transfer system is an air conditioning system.

### Claim 16 (depends on 1)

A method of replacing an existing refrigerant contained in a heat transfer system comprising removing at least a portion of said existing refrigerant from said system, said existing refrigerant being R-410A and replacing at least a portion of said existing refrigerant by introducing into said system a refrigerant according to claim 1.

### Claim 17 (depends on 16)

The method of claim 16 wherein the heat transfer system is an air conditioning system.