催化裂化汽油选择性深度加氢脱硫技术OCT-MD的开发  

DEVELOPMENT OF OCT-MD PROCESS FOR SELECTIVE DEEP DESULFURIZATION OF FCC NAPHTHA

作　　者：赵乐平[1] 方向晨[1] 王艳涛[2] 刘晓欣[2] 

机构地区：[1]中国石油化工股份有限公司抚顺石油化工研究院,辽宁省抚顺市113001 [2]中国石化石家庄炼油化工股份有限公司,河北省石家庄市050032

出　　处：《炼油技术与工程》2008年第7期3-6,共4页Petroleum Refinery Engineering

摘　　要：中国石油化工股份有限公司抚顺石油化工研究院新开发的催化裂化汽油选择性深度加氢脱硫技术OCT- MD,能够通过处理催化裂化汽油来生产超清洁汽油,并且辛烷值损失较小。该技术先将催化裂化汽油脱臭后切割为轻、重两个馏分,然后对重馏分进行加氢脱硫,加氢后重馏分再与轻馏分调合而得到清洁汽油。脱臭工艺可将轻馏分中的硫醇转化为二硫化物而除去,因而可大大降低重馏分加氢脱硫深度,从而避免烯烃过度加氢饱和所造成的辛烷值损失。2007年,首套采用OCT-MD技术的工业装置在中国石化石家庄炼油化工股份有限公司投入运行,生产出硫质量分数小于50μg/g的超清洁汽油,标定结果表明,OCT-MD技术将催化裂化汽油硫质量分数由575～710μg/g降到28～41μg/g,研究法辛烷值损失仅为0.9～1.6个单位,表明OCT-MD技术可为我国炼油厂超清洁汽油生产提供经济、灵活的技术方案。OCT-MD process which newly developed by Fushun Research Institute of Petroleum and Petrochemicals （FRIPP） , SINOPEC can selectively and deeply remove sulfur from FCC naphtha for production of ultra-clean gasoline with low octane number loss. In this process, the FCC naphtha is first sweetened and separated into two fractions i.e. LCN and HCN. The HCN is treated by hydrodesulfurization. The hydrodesulfurized HCN is then blended with LCN to produce ultra-clean gasoline. In sweetening process, the mercaptan in LCN is converted into disulfide to be removed, which greatly reduces the severity of hydrodesulfurization of HCN and minimizes the octane loss from excessive olefin saturation. OCT-MD process was successfully applied in the commercial unit in Shijiazhuang refinery of SINOPEC in July, 2007. The ultra-clean gasoline with sulfur less 50 ppm was produced with little octane loss. The commercial performance showed that the sulfur in FCCN was reduced to 28-41 ppm from 575-710 ppm, and the research octane number （RON） loss is only 0.9-1.6 unit, indicating that OCT-MD process can provide flexible and economic technological options for the production of ultra-clean gasoline in refineries of China.

关 键 词：催化裂化汽油 选择性加氢脱硫 脱臭 清洁汽油生产 工业应用 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]