| 摘要 |
Sulphur containing gasoline is distilled at A to form two fractions: <SL> <LI>i) a lighter, thiophene containing fraction 3 with an end point of 70 to 200{C; <LI> <LI>ii) a heavier fraction 5, containing heavy sulphur compounds. </SL> The lighter fraction contacts a solid adsorbant C1, C2 and the heavier fraction undergoes hydrodesulphurisation. The cut point for the distillation is selected as a function of the concentration of aromatic hydrocarbons present in the thiophene fraction and the percentage by weight of the aromatic compounds in said fraction is less than 25%. Preferably, the initial gasoline is distilled into three fractions, the thiophene being contained in the middle fraction. |
