油浆利用加工工艺的对比

Comparative Study of the Utilization Process of Slurry Oil

催化裂化油浆含有重芳烃和饱和烃,以及少量胶质沥青质,可以通过溶剂抽提和馏分切割分离后分别加以利用。提出了油浆减压切割-溶剂抽提(方案1)和溶剂抽提-减压切割(方案2)两种加工工艺方案,对比考察了工艺条件以及产品性质。在5.586kPa真空度下,减压切割胶质、沥青质重馏分的温度均为355℃。方案1抽提条件:剂油比1.8,抽提搅拌时间20min,抽提温度70℃;其抽余油、芳烃馏分、重馏分收率分别为26.94%、42.86%、30.20%;抽余油中饱和烃含量82.50%,芳烃馏分中芳烃含量86.62%。方案2抽提条件:剂油比2.5,抽提时间30min,抽提温度80℃,其抽余油、芳烃馏分、重馏分收率分别为39.10%、32.17%、28.73%;抽余油中饱和烃含量61.14%,芳烃馏分中芳烃含量85.11%。经比较,方案1优于方案2。

The Fluid Catalytic Cracking Slurry contains heavy aromatics,satisfied hydrocarbon and a small amount of gum and bituminous,which could be used separately by solvent extraction and fraction cutting.This study put forward two process technologies which were vacuum cutting-solvent extraction（scheme 1） and solvent extraction-vacuum cutting（scheme 2） of slurry and conducted a comparative study of technology conditions and product properties.The temperature of cutting gum and bituminous are both 355 ℃ under the vacuum degree of 5.586 kPa.The extractive conditions of scheme 1 are as follows： solvent to oil 1.8,extractive stirring time 20 min,extractive temperature 70 ℃;the yield of raffinate oil,aromatic fraction,heavy fraction are 26.94%,42.86%,30.20% respectively;the content of satisfied hydrocarbon in raffinate oil were 82.50% and the content of aromatic hydrocarbon in raffinate oil are 86.62%.The extractive conditions of scheme 2 are as follows： solvent to oil 2.5,extractive stirring time 30 min,extractive temperature 80 ℃;the yield of raffinate oil,aromatic fraction,heavy fraction were 39.10%,32.17%,28.73% respectively;the content of satisfied hydrocarbon in raffinate oil are 61.14% and the content of aromatic hydrocarbon in raffinate oil are 85.11%.