INTEGRATED PROCESS FOR UPGRADING HEAVY OIL

摘要

The invention provides an integrated process for processing heavy oil, wherein the integrated process at least comprises: solvent deasphalting is carried out for heavy oil material, and de-oiled asphalt phase is mixed with dispersing agent and then entered a thermal cracking reactor to undergo thermal cracking reactions. Upgraded oil can be obtained through the mixture of the de-asphalted oil and thermal cracking oil separated from thermal cracking reaction products. The solvent and heavy gas oil , which are separated from the thermal cracking reaction products, are respectively recycled back to the solvent deasphalting process as solvent and as mixed feed to remove asphaltene. The integrated process of the present invention solves the problems that solvent is difficult to be separated from asphalt with high softening point in solvent deasphalting process and hard asphalt is difficult to be transported, and oil component that can be extracted from so that the heavy oil doesn't need thermal reaction, which is beneficial for guaranteeing the stability of the products and improving yield of the upgraded oil, and the API gravity will be increased greatly, the carbon residue value, C7 asphaltene and metal content will be decreased obviously, the removal rate of the asphaltene can higher than 96%, the removal rate of metals of nickel and vanadium can up to 80-90%, and also beneficial for producing hydro-upgrading oil with significantly improved production quality.