Abstract: Fischer-Tropsch(F-T) synthetic oil contains a small amount of organic oxides, which affect the yield and selectivity of PAO prepared by olefin polymerization. The removal of organic oxides, such as aldehydes and ketones, in F-T synthetic oils was carried out by a process as follows: the oxygen-containing compounds (mainly aldehydes and ketones) in the F-T synthetic oils were first selectively hydrogenated to produce corresponding alcohols followed by translating into sodium alcoholate by reaction of alcohols and sodium metal, and then the sodium alcoholate were removed by distillation to remove the oxygen-containing compounds. In this thesis, Cu，Cu-Zn，Cu-K，Cu-Ni and Pt catalysts were prepared using α-Al2O3 and γ-Al2O3 as supports, respectively, and characterized and tested for the hydrodeoxygenation performance of F-T synthetic oils. The research data indicated that the main components of F-T synthetic oils were olefins and alkanes, and the oxygen-containing compounds were mainly small amounts of alcohols, ketones and aldehydes. The hydrogenation can remove oxides, but has a saturation effect on olefins. The test results showed that the selectivity of the catalyst with α-Al2O3 as the carrier is better than the catalyst with γ-Al2O3. Cu-Zn/α-Al2O3 catalyst had the best effect. Under the conditions of a pressure of 1 MPa, a temperature of 180 ℃, a space velocity of 2 h-1 and a volume ratio of hydrogen/oil of 50, and the simulated oil as test feed, the olefins loss was 12% and the aldehyde hydrogenation conversion rate reached 95.3%, and no reaction of alcohol hydrogenation to hydrocarbons was found.

Key words: Fischer-Tropsch synthesis oil, oxygen-containing compounds, alumina, hydrogenation catalyst