# US 11,306,235 B2 · Compositions containing difluoromethane and fluorine substituted olefins

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- Number: US 11,306,235 B2
- Document ID: US11306235B2
- Status: Granted
- Kind: B2
- Application number: 17/065,173
- Filed: 2020-10-07
- Published: 2021-01-21
- Granted: 2022-04-19
- Earliest claimed: 2009-07-29
- Assignees: Honeywell International Inc.
- Applicants: Honeywell International Inc.
- Inventors: Ryan Hulse; Rajiv Ratna Singh; Justin Becker; Robert Gerard Richard; Rajat S. Basu; Hang T. Pham; Ian Shankland
- Web page: https://patentgrep.com/patent/US11306235B2

## CPC

- C09K 5/045: {containing only fluorine as halogen}
- F25B 9/00: Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- C09K 2205/122: Halogenated hydrocarbons
- C09K 2205/126: Unsaturated fluorinated hydrocarbons
- C09K 2205/22: All components of a mixture being fluoro compounds
- C09K 2205/40: Replacement mixtures
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS

## Abstract

Compositions comprising multi-fluorinated olefins and HFC-32 are disclosed. Such compositions are useful particularly for in stationary refrigeration and air conditioning equipment.

## Claims

### Claim 1

A refrigerant for replacing R-404A in a medium temperature or low temperature refrigeration system or for an air conditioning system, said refrigerant consisting of:
(a) from 70% to 80% by weight of 1234yf; and
(b) from 20% to 30% by weight of R-32.

### Claim 2 (depends on 1)

An air conditioning system comprising the refrigerant of claim 1.

### Claim 3 (depends on 1)

A stationary air conditioning system comprising the refrigerant of claim 1.

### Claim 4 (depends on 1)

A medium temperature refrigeration system comprising the refrigerant of claim 1.

### Claim 5 (depends on 4)

The medium temperature or a low temperature refrigeration system according to claim 4 wherein said system was a system for use with R-404A.

### Claim 6

A refrigerant for replacing R-404A in a low temperature or a medium temperature refrigeration system or for an air conditioning system, said refrigerant consisting of:
(a) about 80% by weight of 1234yf; and
(b) about 20% by weight of R-32.

### Claim 7 (depends on 6)

An air conditioning system comprising the refrigerant of claim 6.

### Claim 8 (depends on 6)

A stationary air conditioning system comprising the refrigerant of claim 6.

### Claim 9 (depends on 6)

A medium temperature refrigeration system comprising the refrigerant of claim 6.

### Claim 10 (depends on 9)

The medium temperature or the low temperature refrigeration system according to claim 9 wherein said system was a system for use with R-404A.