| 摘要 |
A method of purification of liquid raw oil containing volatilizable impurities in which the raw oil is first fed into a scrubbing zone and from there into two subsequent purification zones, in one of which the impurities are volatilized and the volatilized impurities are passed into the scrubbing zone to be scrubbed with the fresh raw oil fed thereinto so that the latter will absorb the impurities and the raw oil thus containing an increased percentage of impurities is subjected in the other purification zone to purification in which at least a part of the impurities are removed by neutralization or distillation.
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