微波辅助络合萃取脱除柴油中碱性氮化物的工艺研究

依据萃取理论,运用正交实验设计方法,用95%乙醇和微量SnCl_2组成的复配剂在微波辐射条件下对催化裂化柴油进行精制工艺研究。结果表明,在复配剂中SnCl_2质量分数0．6%,压力0．3MPa,功率225W,剂油比1．0,辐射时间6min时,碱性氮脱除率为94．1%,回收率为94．8%。该方法与传统络合萃取相比节约了金属离子用量,提高了脱氮率,而且清洁无污染。

REMOVAL OF BASIC NITROGEN-CONTAINING COMPOUNDS FROM DIESEL OIL BY MICROWAVE RADIATION ASSISTED COMPLEXATION EXTRACTION

Solvent extraction based on reversible chemical complexation shows high selectivity and high capacity for separation.An effective method of complexation extraction for removing the basic nitro- gen-containing compounds from catalytically-cracked oil from Anshan crude oil by microwave radiation assistance were developed.The results showed that basic nitrogen-containing compounds in the diesel oil were effectively extracted with 95% ethanol containing minor amounts of metal ions.The optimal conditions were found as follows.0.6% metal ions,0.3 MPa,225 W microwave radiation,1:1 (vol- ume) of solvent to oil and radiation time 6 min.Under the above conditions,the efficiency of the re- moval of the basic nitrogen-containing compounds was 94.1% with 94.8% recovery of oil.Compared with the conventional method,the new method not only uses lower metal content,but also has the advantages of higher removal efficiency of basic nitrogen-containing compounds,higher recovery of catalytically-cracked diesel oil and less contamination.