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    • 4. 发明授权
    • Two stage extraction oil treatment process
    • 两阶段萃取油处理工艺
    • US06802960B1
    • 2004-10-12
    • US09665908
    • 2000-09-20
    • John Philip DaviesKellie Peta Grace
    • John Philip DaviesKellie Peta Grace
    • C01G2102
    • C10G21/00C10G2400/10
    • A process for the production of a process oil, the process comprising: a) contacting a petroleum distillate with a polar solvent in an extraction column which operates with a bottom temperature of 30 to 80° C., b) withdrawing a primary raffinate from the column of step a), c) contacting the primary raffinate with a polar solvent in an extraction column which operates at a bottom temperature that is higher than the bottom temperature of the extraction column of step a), and in the range of 60 to 90° C., d) withdrawing a secondary extract from the column of step c), and e) removing said polar solvent from said secondary extract.
    • 一种用于生产加工油的方法,该方法包括:a)将石油馏出物与极性溶剂在萃取塔中接触,萃取塔的底部温度为30至80℃,b)将主要萃余液从 的步骤a)的柱,c)在提取塔中使主要萃余液与极性溶剂接触,萃取塔的操作温度高于步骤a)的提取塔的底部温度,并且在60至90℃的范围内 ℃),d)从步骤c)的塔中取出第二提取物,和e)从所述第二提取物中除去所述极性溶剂。