关键词: 费-托合成油, 液体蜡, 基础蜡, 加氢脱氧, 吸附分离

Abstract: Based on Fischer-Tropsch synthetic oil, the technologies of deep deoxygenation and molecular sieve dewaxing for producing liquid wax and base wax were developed. The newly developed hydrofinishing catalyst has high deoxidizing activity. Under medium pressure and relatively mild process conditions, the product obtained from the hydrofining of Fischer-Tropsch synthetic oil has the oxygen content of less than 5.0 μg/g and the chromaticity (Cyberport) of more than ＋30. The middle fraction can be used as a feedstock for liquid wax, and the tail oil fraction can be used as a feedstock for base wax. The results of molecular sieve dewaxing test showed that the mass fraction of n-alkanes in the separated light liquid wax was 99.25%, which was higher than the lower limit (98.5%) specified in GB/T 32066—2015; the mass fraction of n-alkanes in the separated heavy liquid wax was 99.44%, which was much higher than the lower limit (95%) specified in GB/T 32066—2015.

Key words: Fischer-Tropsch synthetic oil, liquid wax, basic wax, hydrodeoxygenation, adsorptive separation