US2007295931A1PendingUtilityA1

Refrigerant compositions

56
Individually held — no corporate assignee on recordPriority: Jul 12, 1999Filed: Jun 21, 2007Published: Dec 27, 2007
Est. expiryJul 12, 2019(expired)· nominal 20-yr term from priority
Inventors:Neil Andre RobertsOwen Ross Chambers
C09K 5/045C09K 2205/112C09K 2205/12C09K 2205/124
56
PatentIndex Score
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Claims

Abstract

Refrigerant compositions are provided which include: (a) pentafluoroethane or trifluoromethoxydifluoromethane or hexafluorocyclopropane or mixtures thereof, in an amount from about 60 to about 70% by weight based on the weight of the composition; (b) 1,1,1,2- or 1,1,2,2-tetrafluoroethane or trifluoromethoxypentafluoroethane or 1,1,1,2,3,3-heptafluoropropane or mixtures thereof, in an amount from about 26 to 36% by weight based on the weight of the composition; and (c) an ethylenically unsaturated or saturated hydrocarbon, optionally containing one or more oxygen atoms, having a boiling point from −12° C. to +10° C., or a mixture thereof, or a mixture of one or more of the hydrocarbons with one or more other hydrocarbons or ethers, said mixture having a bubble point from −12° C. to +10° C., in an amount from about 1% to 4% by weight based on the weight of the composition. Also provided is a process of refrigeration using the refrigerant compositions and a refrigeration apparatus containing the refrigerant compositions.

Claims

exact text as granted — not AI-modified
1 - 23 . (canceled)  
     
     
         24 . A nonflammable refrigerant composition consisting of: 
 (a) pentafluoroethane in an amount from 62-70% based on the weight of the composition;    (b) selected from 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, or a mixture thereof in an amount from 26 to 36% by weight based on the weight of the composition; and    (c) mixture of dimethyether and n-butane in an amount of from 1-4% by weight based on the weight of the composition.    
     
     
         25 . A nonflammable refrigerant composition consisting of: 
 (a) pentafluoroethane in an amount from 62-70% based on the weight of the composition;    (b) selected from 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, or a mixture thereof in an amount from 26 to 36% by weight based on the weight of the composition;    (c) mixture of dimethyether and n-butane in an amount of from 1-4% by weight based on the weight of the composition; and    (d) at least one lubricant.    
     
     
         26 . A nonflammable refrigerant composition consisting of: 
 (a) pentafluoroethane in an amount from 62-70% based on the weight of the composition;    (b) 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, or a mixture thereof in an amount from 26 to 36% by weight based on the weight of the composition;    (c) mixture of dimethyether and n-butane in an amount of from 1-4% by weight based on the weight of the composition;    (d) at least one lubricant; and    (e) at least one additive.    
     
     
         27 . A nonflammable refrigerant composition consisting of: 
 (a) pentafluoroethane in an amount from 62-70% based on the weight of the composition;    (b) 1,1,1,2-tetrafluoroethane in an amount from 26 to 36% by weight based on the weight of the composition;    (c) mixture of dimethyether and n-butane in an amount of from 1-4% by weight based on the weight of the composition; and    (d) at least one additive.    
     
     
         28 . The nonflammable composition according to  claim 25 , wherein at least one lubricant is selected from the group consisting of mineral oils, alkylbenzene lubricants, synthetic lubricants, and fluorinated oils and mixtures thereof.  
     
     
         29 . The nonflammable composition according to  claim 26 , wherein at least one lubricant is selected from the group consisting of mineral oils, alkylbenzene lubricants, synthetic lubricants, and fluorinated oils and mixtures thereof; and at least one additive is selected from the group consisting of extreme pressure, antiwear improvers, oxidation inhibitors, thermal stability improvers, corrosion inhibitors improvers, viscosity index improvers, pour point depressants, detergents, anti-foaming agents, and viscosity adjusters.  
     
     
         30 . The nonflammable composition according to  claim 27 , wherein at least one additive is selected from the group consisting of extreme pressure, antiwear improvers, oxidation inhibitors, thermal stability improvers, corrosion inhibitors improvers, viscosity index improvers, pour point depressants, detergents, anti-foaming agents, and viscosity adjusters.  
     
     
         31 . The composition according to  claim 24 , in which component (a) is present in an amount above 67% up to 67% by weight based on the weight of the composition.  
     
     
         32 . The composition according to  claim 24  in which component (b) is present in an amount about 28% to about 32% by weight based on the weight of the composition.  
     
     
         33 . A refrigeration apparatus containing, as refrigerant, a composition as claimed in  claim 24 .  
     
     
         34 . A refrigeration apparatus containing, as refrigerant, a composition as claimed in  claim 25 .  
     
     
         35 . A refrigeration apparatus containing, as refrigerant, a composition as claimed in  claim 26 .  
     
     
         36 . A refrigeration apparatus containing, as refrigerant, a composition as claimed in  claim 27.

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