With the development of the economy and the strengthening of environmental protection consciousness of energy conservation and emission reduction,the quality requirements of liquefied petroleum gas(LPG) is more and more high,but the quality of liquefied petroleum gas(LPG) has not been stable,the main problem is that the copper corrosion of liquefied petroleum gas(LPG) is not qualified.According to the survey,liquefied petroleum gas(LPG) of other domestic refineries is also troubled by the low percent of pas...