不同基属FCC油浆的萃取分离与应用研究

EXTRACTING SEPARATION AND APPLICATION OF FCC SLURRY FROM VARIOUS BASE CRUDE OILS

采用一种新型溶剂对环烷基、中间基、石蜡基FCC油浆进行萃取,分别得到饱和烃和芳烃。考察了溶剂的萃取性能、萃取分离的操作条件、抽提油与抽余油的性质和可能的利用途径。结果表明,该溶剂对三种油浆萃取均有明显效果,但具体操作条件有异,各部分收率也不同。所得芳烃可切割成橡胶填充油、软化剂和沥青改性剂,由环烷基和中间基油浆得到的软化剂和填充油符合质量指标要求,而由石蜡基油浆得到的产品需改进凝点和粘度。油浆中的固体颗粒可以完全转移至饱和烃中,饱和烃可以作为FCC进料返回FCC装置,其中由石蜡基油浆得到的饱和烃还可以进一步开发为润滑油料和石蜡。

A new type of solvent was used to extract and separate FCC slurry to saturated hydrocarbons and aromatic hydrocarbons. Three kinds of FCC slurries from various crude oils were involved including naphthenie, intermediate and paraffinie base. The solvent performance, extracting conditions,the properties of extract and remainder, and the application of these two streams were investigated. Results showed that said solvent could effectively separate the three kinds of FCC slurry, yet the extraction conditions and product yields were a bit varied. The obtained aromatic hydrocarbons stream was cut into three fractions for the use of rubber softener, rubber filler and asphalt blending component. The qualities of rubber softener and rubber filler from naphthenie and intermediate FCC slurry could meet the requirements of the relative product standards; the products from paraffinie FCC slurry still needed to be improved. The solid particles in the FCC slurry were transferred into the saturated hydrocarbons stream, and said stream could be used as FCC feedstock. Furthermore, the saturated hydrocarbons obtained from paraffinie base slurry could be used as feedstock of lubricant and wax.