Objective Solve the utilization problem of CNOOC's naphthenic heavy distillate.

Method The solvent deasphalting test was carried out on the mixture of naphthenic crude oil and vacuum residue with propane as raw materials.

Results When the mass ratio of the mixed oil of the fourth vacuum line distillate and vacuum residue was 45∶55, the quality of the fourth vacuum line light deoiling obtained was good and the yield was high, and the commercial operation was realized on this ratio. When the environmentally friendly rubber plasticizer with a C_A value of more than 12% could be produced by hydrotreating process or furfural refining process using the light deoiling of the fourth vacuum line produced in industry as the raw material, the overall economy of the hydrogenation process was better. Two-stage furfural extraction process could produce environment-friendly rubber plasticizer with high C_A value of more than 25%, and the yield of the target product was about 22%.

Conclusion After propane deasphalting, the exchange of ideal components of naphthenic heavy distillate and vacuum residue can be realized, which is beneficial to the high value utilization of heavy distillate.