| 摘要 |
PURPOSE:To provide the titled composition of high corrosion resistance and thermal stability, free from crystal deposition, having vapor pressure nearly equal to the atmospheric pressure, also easy to handle, comprising dichlorotrifluoroethane and N-methyl-2-pyrrolidone as refrigerant carrier and absorbent, respectively. CONSTITUTION:The objective composition comprising dichlorotrifluoroethane of formula I , II, or III (pref. formula II) and N-methyl-2-pyrrolidone as refrigerant carrier and absorbent, respectively. Assuming the evaporation temperature of said refrigerant carrier and absorption temperature to be 0 deg.C and 44-53 deg.C, respectively, it is preferable to be so design that the absorbent concentration varies from 44-54wt% throughout one-round operation. |
