Mixed refrigerant for a cryogenic temperature range, and methods for preparing and applying the same

摘要

The embodiments of the invention disclose a mixed refrigerant for a cryogenic temperature range, and methods for preparing and applying the same. The mixed refrigerant comprises six types of refrigerants: the first type of refrigerant is argon or nitrogen; the second type of refrigerant is methane or krypton; the third type of refrigerant is tetrafluoromethane; the fourth type of refrigerant is trifluoromethane or fluoromethane; the fifth type of refrigerant is at least one of 2,3,3,3□tetrafluoro-1-propene, hexafluoropropylene, pentafluoropropene, and 1,3,3,3-tetrafluoro-1-propene; and the sixth type of refrigerant is at least one of 1,1,1,3,3-pentafluoropropane, 1,1,2,2,3-pentafluoropropane, monochloro-trifluoropropene, and hexafluoro-2-butene. The mixed refrigerant has the advantages of a low ODP value, a low GWP value and non-flammability, it achieves the beneficial effects of non-toxic, environmental-friendly, convenient and safe, and it is for large-scale industrial production applications.