随着我国人民生活水平的不断提高和交通运输业的发展,汽车保有量在迅猛增长,作为汽车发动机燃料的车用汽油,其年产量、消费量也逐年增长,2004年我国汽油产量为5250万吨,比2003年增长10.2%。与此同时,国家对环保和汽车尾气排放的要求越来越严格,汽油产品在实现无铅化后,已进入清 With the continuous improvement of people’s living standard in our country and the development of transportation industry, the car ownership is growing rapidly. As the motor gasoline used for automobile engine fuel, its annual output and consumption also increase year by year. In 2004, China’s gasoline output was 52.5 million Ton, an increase of 10.2% over 2003. At the same time, the state’s requirements on environmental protection and automobile exhaust emissions are becoming more stringent. After the gasoline products are lead-free, they have entered the market