Which types of refrigerants commonly use alkyl-benzene lubricants?

Alkyl-benzene lubricants are specifically designed to work effectively with certain types of refrigerants, particularly those that are chlorine-based, such as CFCs (Chlorofluorocarbons) and HCFCs (Hydrochlorofluorocarbons). These lubricants are well-suited for these refrigerants due to their chemical compatibility and superior performance in maintaining oil circulation and lubrication within the refrigeration systems.

CFCs and HCFCs operate at different pressures and temperatures, and the alkyl-benzene lubricants provide necessary lubrication properties while also being able to mix or solvate well with these refrigerants. This compatibility helps to ensure that the refrigeration system runs efficiently, reduces wear and tear on the compressor, and helps prevent issues related to foaming or oil breakdown.

In contrast, refrigerants such as HFCs (Hydrofluorocarbons) typically use different types of lubricants, like polyol esters, which are specifically formulated for use with those substances. Therefore, while HFCs might require different lubricants, the combination of CFCs and HCFCs aligning with alkyl-benzene lubricants is a well-established practice in the refrigeration industry.