With C9 fraction of a boiling range of 155-220 ℃ from ethylene cracking as the feedstock,the laboratory tests of distillation cutting,comparison and evaluation of hydrogenation catalyst and hydrogenated gasoline blending were performed to study C9 feedstock properties,hydrogenation technology,catalyst performance and utilization of hydrogenated products.In a 200 L laboratory distillation unit,the heavy components and detrimental impurities in C9 distillate were cut out,and the products cut from distillation were used as good feedstock for hydrogenation.The comparison of product properties,inlet temperature and bed temperature rise,etc in the hydrogenation evaluation test showed that L series C9 fraction catalyst for one and two stage hydrogenation processed offered a better hydrogenation activity,selectivity and stability than the reference catalyst.The hydrogenated products from one-stage hydrogenation of C9 fraction can be used as the blending component of gasoline,and blending ratio can be as high as 10%.Whereas,the hydrogenated products from two-stage hydrogenation of C9 fraction can be used to produce solvent oil with high aromatics by separation.

The mixed gasoline from VGO FCCU and VR FCCU was dearsenified with adsorption dearsenification agent STAS-2.The reaction results indicate that it is difficult to remove arsenic under ambient temperature and atmospheric pressure.With rising temperature,the activity of the dearsenification gent is increased and the rate of dearsenification can reach to over 90%.But the excessive high temperature will reduce the olefins in FCC gasoline.The optimal reaction conditions of adsorption dearsenifcation of FCC gasoline are atmospheric pressure,80 ℃ reaction temperature and 2.0 h-1 volumetric space velocity.

The tests on one-stage hydrogenation of cracked gasoline using catalyst Ni-1 were performed on a 500 mL adiabatic bed testing plant.The results demonstrated that the appropriate operating conditions were: 50 T inlet temperature,2.5-3.0 MPa operating pressure,1.5-2.5 h~(-1) space velocity of fresh oil,150-250 volumetric ratio of hydrogen to fresh oil and 2- 1-4:1 feed oil dilution ratio.The catalyst has been operated under these conditions for one operating cycle and diolefins is no greater than 2.0 g/(100 g).