| 摘要 |
PURPOSE:To prepare an absorption refrigerant composition having excellent thermal stability at high temperature, and suitable for an absorption refrigerating machine, heat pump, etc., by adding a phosphate compound to a mixture of fluorohydrocarbon as a solvent and a glycol ether organic solvent as an absorbent. CONSTITUTION:The objective composition is prepared by adding (A) a phosphate compound[preferably an alkyl phosphate of formula (R3-R5 are H, alkyl, alkoxy, phenyl, or alkylphenyl)]to (B) a fluorohydrocarbon (preferably dichloromonofluoromethane, monochlorotetrafluoroethane, etc.) as a solvent and (C) a glycol ether organic solvent (preferably ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, etc.) as an absorbent. The amount of the component (A) is 0.01-0.5wt% of the component (C) in terms of phosphorus concentration. EFFECT:There is little yellowing of the composition and no formation of tarry black solid even at a high temperature, and the life of the composition is longer than that of the conventional one by a factor of 10. |
