All grades of the company’s domestic ex-factory gasoline quality meet the national Ⅲ standard since December 1, and upgrades to the national Ⅲ standard one month before the date stipulated by the state.

Compared with the national Ⅱstandard, sulphur content of the national Ⅲ standard gasoline decreases from 500PPm to 150PPm, benzene from 2.5% to 1.0%, olefin from 35% to 30%, therefore significantly increasing difficulty in producing. In order to make all our company’s domestic ex-factory gasoline quality meets the national Ⅲ standard before the end of November, No.1 hydrogenation unit was retrofited to 700,000 t/a catalytic gasoline selective hydrodesulfurization unit, starting up in advance as a spare unit of catalytic gasoline adsorption desulfurization unit.

Catalytic gasoline selective hydrodesulfurization unit started up successfully once on October 23, producing clean blending component with sulphur content less than 50 ppm. All products by replacement are qualified on November 10, meeting the national Ⅲgasoline producing standard. Gasoline products blended in tanks on normal operation conditions are certified to meet the national Ⅲ standard through tracking and test of more than half a month. The company decided to control domestic gasoline quality indicators according to the national Ⅲ standard from December 1, upgrading to the national Ⅲ standard one month before national stipulated date.