求翻译：washed with brine. The ethyl acetate layer was dried over anhydrous Na2SO4 and evaporated. The purification of the crude是什么意思？

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washed with brine. The ethyl acetate layer was dried over anhydrous Na2SO4 and evaporated. The purification of the crude

问题补充：

匿名	2013-05-23 12:21:38 null

匿名	2013-05-23 12:23:18 用盐水。干的乙酸乙酯层是在无水硫酸钠Na2SO4和蒸发。原油的净化

匿名	2013-05-23 12:24:58 洗涤与盐水。乙酸乙酯层数被烘干了在无水硫酸钠并且被蒸发了。原油的洗净

匿名	2013-05-23 12:26:38 用盐水洗了。乙酸乙酯层对无水 Na2SO4 干，蒸发掉了。纯化原油

匿名	2013-05-23 12:28:18 null

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