英语翻译oil gasoline produced by simple distillation of crude oi
英语翻译
oil
gasoline produced by simple distillation of crude oil or via conversion processes such as thermal or catalytic cracking contains a large variety of undesirable impurities
,which are different both in quality and quantity depending on the manufacturing process applied.the quantity varies between a few to sone thousand of parts per million.,and their influence on the properties of the gasoline may be quiet dissimilar.Examples of such impurities which are found in gasoline fractions and in particular in catalytically cracked material are: