焦化柴油氧化脱硫的工艺研究

以双氧水作氧化剂,甲醇作萃取剂,采用氧化反应与溶剂萃取相结合的方法对焦化柴油进行了氧化脱硫研究。通过单因素实验考察了氧化剂质量、反应时间、反应温度、催化剂的选择、催化剂的质量等对焦化柴油脱硫率的影响。结果表明,最适宜的氧化脱硫条件为:甲酸作催化剂,反应温度60℃、反应时间60min、剂油体积比为0.1,V(氧化剂):V(催化剂)为1.0。萃取试验条件为:在室温条件下,V(萃取剂):V(柴油)为1.0,静置时间20min。精制后柴油回收率达93.0%,柴油中硫的质量分数可降至350μg/g以下。

Process of Oxidative Desulfurization of Coking Diesel

The process of oxidation reactions and solvent extraction for coking diesel with hydrogen peroxide as an oxidant and methanol as the extractant was studied.The influences of the oxidants amount,reaction time,oxidation temperature,the ratio of oxidants to catalyst,the ratio of oil to extraction agent were investigated.The optimal operation conditions are as follows: reaction temperature 60 ℃,oxidation time 60 min,volume ratio of oxidants to diesel 0.1,formic acid as a catalyst,volume ratio of oxidants to catalyst 1.0;volume ratio of extraction to oil 1.0,extracting at room temperature for 20 min.The results show that the yield of diesel fuel is 93.0%,and the sulfur content of diesel can be reduced to less than 350 μg/g.