Substitute refrigerant for dichlorodifluoromethane refrigeration systems

• US 5,425,890 A
• Filed: 01/11/1994
• Issued: 06/20/1995
• Est. Priority Date: 01/11/1994
• Status: Expired due to Fees

• Current Assignee: Intercool Distribution, LLC
• Original Assignee: APD Cryogenics, Inc.
• Inventors: Stevenson, Richard, Yudin, Boris V., Boyarsky, Mikhail, Podcherniev, Oleg N.
• Primary Examiner(s): TIERNEY, CHRISTINE SKANE
• Application Number:
  US08/180,208
• Time in Patent Office: 525 Days
• Field of Search: 252/67, 62/114
• US Class Current: 252/67
• CPC Class Codes: C09K 2205/12 Hydrocarbons
• CPC Class Codes: C09K 2205/122 Halogenated hydrocarbons
• CPC Class Codes: C09K 2205/42 Type R12
• CPC Class Codes: C09K 5/045 containing only fluorine as halogen

Abstract

A mixed gas refrigerant for use as a replacement for CFC refrigerants, and specifically, for R-12, which includes at least three components including R-134a, R-124, and n-butane.

Claims

1. A refrigerant composition for use as a substitute for R-12 in R-12 refrigeration apparatus, comprising a mixture of:

(i) 61-65 molar % of R-134a;

(ii) 28-32 molar % of R-124; and

(iii) 4-9 molar % of n-butane.

2. A refrigerant composition for use as a substitute for R-12 in R-12 refrigeration apparatus, comprising a mixture of:

(i) 53-57 molar % of R-134a;

(ii) 35-39 molar % of R-124; and

(iii) 6-10 molar % of n-butane.

3. A refrigerant composition for use as a substitute for R-12 in R-12 refrigeration apparatus, consisting of a mixture of:

(i) 61-65 molar % of R-134a;

(ii) 28-32 molar % of R-124; and

(iii) 5-9 molar % n-butane.

4. A refrigerant composition for use as a substitute for R-12 in R-12 refrigeration apparatus, consisting of a mixture of:

(i) 53-57 molar % of R-134a;

(ii) 35-39 molar % of R-124; and

(iii) 6-10 molar % n-butane.