Abstract: Two kinds of combined hydrogenation processes (CoMo/Al2O3 desulfurization+mid temperature ZnO + Ni/Al2O3 dearomatization process I and Ni/ZnO adsorption + Ni/Al2O3 process II) were compared to investigate which one is suitable for producing vegetable oil extraction solvent. The test feeds were two light hydrocarbons with S content of 106μg/g and 25μg/g, respectively. The results showed that the bromine indexes and the contents of aromatics are very low in initial reaction stage of process-I for the two feeds. But 400 h and 550 h later, the content of aromatics rises up and all exceeds 0.1%. For process-Ⅱ, when the sulfur content in feed is 25 μg/g, the bromine index of the product maintains below 16 mg Br/（100g）, and the content of aromatics is less than 0.09%, indicating that processⅡis suitable for producing vegetable oil extraction solvent from the low s content feed.

Key words: hydrogenation, deep desulfurization, hydrodearomatization, vegetable oil extraction solvent