PETROLEUM RESIDUE DEWAXING PROCESS Russian patent published in 2006 - IPC C10G21/14 

FIELD: petroleum processing.

SUBSTANCE: process, which is, in particular, suitable in production of raw materials for secondary processes via purification of petroleum residues with hydrocarbon solvents, is characterized by that, after purification of petroleum residues, organic solvent is regenerated by stripping solvent contained in purification products and in wax solution, freed from hydrogen sulfide, compressed and recycled into process. Compression of solvent is performed in flow compressor employing as working medium solvent vapors withdrawn from dewaxed solution evaporator.

EFFECT: reduced loss of solvent, reduced consumption of water steam, and improved quality of dewaxed product and wax.

3 cl, 1 dwg, 1 tbl, 4 ex