# US 11,306,233 B2 · Compositions containing difluoromethane, tetrafluoropropene, and carbon dioxide and uses thereof

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- Number: US 11,306,233 B2
- Document ID: US11306233B2
- Status: Granted
- Kind: B2
- Application number: 16/637,787
- Filed: 2018-10-03
- Published: 2020-07-09
- Granted: 2022-04-19
- Earliest claimed: 2017-10-12
- Assignees: The Chemours Company Fc, LLC
- Applicants: The Chemours Company Fc, LLC
- Inventors: Joshua Hughes; Barbara Haviland Minor
- Web page: https://patentgrep.com/patent/US11306233B2

## CPC

- C09K 5/045: {containing only fluorine as halogen}
- C10M 171/008: {Lubricant compositions compatible with refrigerants}
- C09K 2205/106: Carbon dioxide
- C09K 2205/122: Halogenated hydrocarbons
- C09K 2205/126: Unsaturated fluorinated hydrocarbons
- C09K 2205/40: Replacement mixtures
- C10M 2203/0206: used as base material
- C10M 2203/045: used as base material
- C10M 2203/065: used as base material
- C10M 2205/0285: used as base material
- C10M 2207/2835: used as base material
- C10M 2209/043: used as base material
- C10M 2209/1023: used as base material
- C10M 2209/1033: used as base material
- C10N 2020/101: {Containing Hydrofluorocarbons}
- C10N 2020/106: {Containing Carbon dioxide}
- 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)
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS

## Abstract

In accordance with the present invention refrigerant compositions are disclosed. The compositions comprise a refrigerant mixture consisting essentially of HFC-32, HFO-1234yf, and CO2. The compositions are useful as refrigerants in processes to produce cooling and heating, in methods for replacing refrigerant R-410A, and in refrigeration, air conditioning or heat pump systems. These inventive compositions match cooling capacity for R-410A within ±10% with GWP less than 400 or less than 300.

## Claims

### Claim 1

A composition for replacing R-410A consisting of 42 to 44 weight percent difluoromethane, 48 to 53 weight percent 2,3,3,3-tetrafluoropropene, and 3 to 8 weight percent carbon dioxide, wherein the composition provides volumetric capacity within 10% of that for R-410A, average temperature glide of less than 8° C., a GWP of less than 300, and a compressor discharge temperature of at least 80° C.

### Claim 2 (depends on 1)

The composition of claim 1 consisting of 42 to 44 weight percent difluoromethane, 48 to 51 weight percent 2,3,3,3-tetrafluoropropene, and 7 to 9 weight percent carbon dioxide.

### Claim 3 (depends on 1)

The composition of claim 1 consisting of 43 to 44 weight percent difluoromethane, 48 to 50 weight percent 2,3,3,3-tetrafluoropropene, and 7 to 8 weight percent carbon dioxide.

### Claim 4 (depends on 1)

The composition of claim 1 consisting of 44 weight percent difluoromethane, 49 weight percent 2,3,3,3-tetrafluoropropene, and 7 weight percent carbon dioxide.

### Claim 5 (depends on 1)

The composition of claim 1 consisting of 44 weight percent difluoromethane, 53 weight percent 2,3,3,3-tetrafluoropropene, and 3 weight percent carbon dioxide.

### Claim 6 (depends on 1)

A process for producing cooling comprising condensing the composition of claim 1 and thereafter evaporating said composition in the vicinity of a body to be cooled.

### Claim 7 (depends on 1)

A process for producing heating comprising evaporating the composition of claim 1 and thereafter condensing said composition in the vicinity of a body to be heated.

### Claim 8 (depends on 1)

A method of replacing R-410A in air conditioning or heat pump systems comprising providing the composition of claim 1 as replacement for said R-410A in said air conditioning or heat pump system.

### Claim 9 (depends on 1)

An air conditioning or heat pump system comprising an evaporator, a compressor, a condenser, and an expansion device, characterized by containing the composition of claim 1.

### Claim 10 (depends on 9)

The air conditioning or heat pump system of claim 9, wherein said system includes one or more heat exchangers that operate in counter-current mode, cross-current mode, or cross-current mode with counter-current tendency.

### Claim 11

A composition for replacing R-410A consisting of:
(a) 42 to 44 weight percent difluoromethane, 48 to 53 weight percent 2,3,3,3-tetrafluoropropene, and 3 to 8 weight percent carbon dioxide, and
(b) one or more components selected from the group consisting of lubricants, dyes, solubilizing agents, compatibilizers, stabilizers, tracers, anti-wear agents, extreme pressure agents, corrosion and oxidation inhibitors, metal surface energy reducers, metal surface deactivators, free radical scavengers, foam control agents, viscosity index improvers, pour point depressants, detergents, viscosity adjusters, and mixtures thereof;
and wherein the composition provides volumetric capacity within 10% of that for R-410A, average temperature glide of less than 8° C., a GWP of less than 300, and a compressor discharge temperature of at least 80° C.

### Claim 12 (depends on 11)

The composition of claim 11, wherein said lubricant is selected from the group consisting of mineral oil, alkylbenzene, polyol esters, polyalkylene glycols, polyvinyl ethers, polycarbonates, perfluoropolyethers, synthetic paraffins, synthetic naphthenes, polyalpha-olefins, and combinations thereof.