Brief description of the refining of the solvent, a fraction of lubricating oil by means of n - methyl pyrrolidone - 2 -

摘要

Process of refining the solvent of a fraction of lubricating oil, in which it is separate the fraction rich in aromatic products from a mixture of the supply of liquid hydrocarbon having a range of the point of were superior to the point of were of the n - methyl - 2 - and comprising aromatic hydrocarbons and non-aromatic hydrocarbons. / p & & p & a phase rich in solvent drops at the interior of the turn of the extraction 2 forming a mixture of primary extraction is rich in aromatic products and unsaturated extracted from the product supply, this mixture is extracted from the bottom of the turn of the extraction 2 via the conduit 4. A phase rich in oil rises to the inside of the tower 2 and extraction is evacuee end of the upper of the tower 2 by the extraction duct 5 in the form of a mixture of the raffinate which is relatively depleted in n - methyl - 2 - and rich in paraffin compounds.