该专利涉及一种高级脂肪酸酯制备烷烃的方法。即在反应器中加入高级脂肪酸酯、催化剂和溶剂,然后充入氢气,高级脂肪酸酯经液相催化加氢脱氧得到烷烃。反应条件为:压力1～10MPa,温度210～320℃,时间4～7h。其中,高级脂肪酸酯为含有8～22个碳原子的脂肪酸甲酯或含有8～22个碳原子 This patent relates to a process for the preparation of alkanes of higher fatty acid esters. Namely, the higher fatty acid ester, catalyst and solvent are added to the reactor, and then hydrogen is added. The higher fatty acid ester is subjected to liquid-phase catalytic hydrodeoxygenation to obtain alkane. The reaction conditions are: pressure 1 ~ 10MPa, temperature 210 ~ 320 ℃, time 4 ~ 7h. Among them, the higher fatty acid ester is a fatty acid methyl ester containing 8 to 22 carbon atoms or a fatty acid methyl ester containing 8 to 22 carbon atoms