Abstract: The deacidification of Liaohe straight-run diesel with combination solvent in the alcohol-ammonia process was carried out. Effects of solvent composition, demulsifier type and amount and the operating conditions on the deacidification ratio and the yields of diesel were all studied. The suitable mass composition of solvent mixture is 5% NH₃·H₂O, 50% ethanol, 45% water and 0.4 μL NP6 demulsifier for 20 mL diesel. Operating conditions are as followings, the volume ratio of solvent to diesel 0.2, the treatment temperature 50 ℃, the processing time 60 seconds and the phase separation time is 20 minutes. The acid value of the diesel after deacidification comes up to the standard GB/T264-83 (acid value<5 mg(KOH)/(100 mL)). The solvent can be recycled by distillation and no waste generates, the naphthenic acid can be obtained by heating the distillation residues.

Key words: traight-run diesel ,  ,  Mixture ,  , Deacidification solvent  , Alcohol-ammonia process

摘要： 利用醇氨法复配溶剂对辽河油田直馏柴油脱酸进行研究,考察了溶剂组成、破乳剂种类和体积及各
操作条件对脱酸率及柴油收率的影响。结果表明,直馏柴油体积为20mL时,确定复配溶剂组成的体积分数为5%
NH₃·H₂O、50%乙醇及45%水,破乳剂为NP6,体积为0.4μL。适宜操作条件为剂油体积比0.2,反应温度50 ℃,
处理时间60s,相分离时间20min,脱酸后柴油的酸度满足GB/T264-83中酸度小于5mg(KOH)/(100mL)的要
求,溶剂经蒸馏可回收循环使用,无三废产生,残余物经加热可以得到环烷酸。

关键词: 直馏柴油 ,  , 复配 ,  , 脱酸剂 ,  , 醇氨法