| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to the regeneration of a solvent from solutions of dewaxing oils, gatches, paraffins, deoiling filtrates in processes of dewaxing, deoiling and combined dewaxing-deoiling processes. The invention deals with a method realised by the distillation of the solvent in successively placed rectification columns with an increase of temperature of flows, which the solvent is extracted from; and further supply of the said flows into evaporation columns. Nitrogen is supplied into the evaporation columns to reduce partial pressure of the solvent component, and in the said columns a vacuum is created by pumping-out a mixture of nitrogen and the solvent vapours by a vacuum pump.EFFECT: obtaining products with the required water content, reduction of power consumption in the process of the solvent regeneration, increase of ecological safety of production.2 dwg, 2 tbl, 2 ex |
