介绍了中国石油天然气股份有限公司乌鲁木齐石化分公司甲基叔丁基醚(MTBE)原料来源及生产过程,阐述了MTBE作为高辛烷值清洁汽油调合组分中硫含量高对生产合格国Ⅴ汽油的影响.分析出传统Merox抽提法和纤维膜碱洗法脱硫精制工艺中存在的不足使得原料混合C4中硫含量偏高以及MTBE生产中对硫化物的富集致使MTBE产品硫含量偏高.同时综述了延迟焦化装置与重油催化裂化装置技术升级和改造方案.采用原料脱硫和产品深度脱硫联合一体化技术降低MTBE中硫含量后,延迟焦化和重油催化装置固碱量累计可节约465 t/a,磺化钛氰钴消耗可节省350 kg/a,可节约生产成本约78万元/a.同时MTBE装置进料中硫质量分数由130 μg/g降至50μg/g,采用萃取精馏后产品MTBE硫质量分数由50 μg/g降至10 μg/g以下,满足生产国Ⅴ汽油技术指标及产品升级要求.%The sources of raw materials i.e methyl tert butyl ether (MTBE) and production processes of SINOPEC Urumqi Petrochemical Company are introduced,and the impact of high sulfur in MTBE as a highoctane clean gasoline blending component on the production of Guo Ⅴ standard gasoline is described.The shortcomings of traditional Merox extraction,fiber membrane extraction and refining process of alkali washing desulfurization which result in the high sulfur in mixed C4s feed and enrichment in the production of MTBE are the main causes of higher sulfur in MTBE product.The upgrading revamping schemes of delayed coker and catalytic reformer are discussed.After application of integrated feedstock desulfurization and product desulfurization to reduce sulfur in MTBE,465 tons/year of cumulative solid alkali is saved,cobalt sulfonated titanium consumption is reduced by 350 kg/year,and the saving cost is 780,000 Yuan RMB/year.At the same time,the sulfur in the feedstock of MTBE unit is decreased from 130 μg/g to 50 μg/g and the sulfur in the product MTBE of the extractive distillation is reduced from 50 pg/g to 10 μg/g,which meet the technical specifications for the production of Guo Ⅴ standard gasoline and requirements of product oil upgrading.
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