氧化法脱除重油催化裂化柴油中的硫化物  

Oxidative desulfurization of RFCC diesel fuel

作　　者：李瑞丽[1] 刘瑛[1] 李波[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《化工进展》2013年第8期1813-1817,共5页Chemical Industry and Engineering Progress

摘　　要：采用双氧水-甲酸对重油催化裂化柴油进行氧化,然后使用N,N-二甲基甲酰胺萃取剂萃取脱硫。研究了在反应体系中氧化时间、氧化温度以及双氧水与甲酸的加入量对氧化脱硫率的影响,并考察了加入分散剂Span-80的效果。最终得到双氧水-甲酸-Span-80体系最佳氧化条件:分散剂Span-80为2.0%,双氧水为36%,甲酸为32%,氧化温度为60℃,氧化时间为50 min。分散剂Span-80的加入可以大大提高双氧水-甲酸体系对重油催化裂化柴油的氧化脱硫能力。在双氧水-甲酸体系最佳条件下氧化萃取脱硫率为85.58%,双氧水-甲酸-Span-80体系脱硫率高达98.27%,重油催化裂化柴油的硫含量由12 500 mg/L降至216 mg/L。气相色谱结果显示,氧化脱硫后重油催化裂化柴油中的噻吩、苯并噻吩及其衍生物基本被脱除,有少量二苯并噻吩及其衍生物需要进一步脱除。Sulfur compounds of RFCC diesel oil were removed by using H2O2-formic acid as oxidant and DMF as extractant.The effects of oxidation time,oxidation temperature,H2O2dosage and formic acid dosage on desulfurization efficiency were studied.The effect of dispersant Span-80 on desulfurization efficiency of oxidation with H2O2-formic acid were also investigated.The optimal oxidation conditions of H2O2-formic acid-Span-80 were mass fraction of Span-80 dispersant 2.0%,volume fraction of H2O2oxidant 36%,volume fraction of formic acid 32%,oxidation temperature 60 ℃,oxidation time 50 min.Desulfurization rate was increased from 85.58% to 98.27% by Span-80 dispersant.The sulfur content of RFCC diesel fuel could be lowered from 12500 mg/L to 216 mg/L.According to GC analysis,the removals of thiophene,benzothiophene and its derivatives were almost complete,and further efforts are needed to remove dibenzothiophene and its derivatives.

关 键 词：重油催化裂化柴油 氧化脱硫 双氧水-甲酸 分散剂Span-80 

分 类 号：TE626[石油与天然气工程—油气加工工程]