Proposed

Existing

The ratio of the hydrocarbon solvent^*) to the feed

1:1

(3.5/5.0):1

Extraction temperature, ˚C

70 - 90

150 - 160

Heat of the solution in an oven deasphalting, ˚C

Absence

270 - 280

Regeneration of the solvent

By reducing the pressure

Two-stage regeneration with a special distillation unit using water vapor

The degree of asphaltenes’ separation

High

Low

DAO yield, % by weight. for raw materials

95.5

85 - 88