EA033391B1 - Method of extracting vanadium from highly viscous petroleum - Google Patents

Abstract

The invention relates to hydrometallurgy of rare and rare-earth metals, in particular, to methods used to extract vanadium in the course of mining vanadium-containing hydrocarbons. The method can be utilized to increase the level of metal extraction, obtain product solutions with high concentrations of extracted metals at the stage of producing crude hydrocarbons. The proposed method solves the task by electrochemical transfer of vanadium compounds into water-soluble form and re-extraction of vanadium from crude oil with the use of extracting agent (working solution) - water anolyte produced by 2-3 min DC electrolysis of 18-20% salt solution at current density of 5-15 A/mm; vanadium-containing ions are selectively extracted at the re-extracting agent to oil ratio of 1:1, crude emulsified within the oil-producing formation when the working solution is pumped in via an injection well and subjected to 10 W/cmultrasonic; the resulting emulsion is further evacuated from the production well and the organic compounds of vanadium are fully oxidized in a reactor with electrophilic catalizer under the conditions of chemical balance in adiabatic mode. The use of the proposed invention will allow to raise the effectiveness of the process of extracting vanadium compounds, reduce expenses on the process due to fuller extraction of vanadium from the formation, acceleration of the process, cut back on power consumption, elimination of the need to use aditional oxidizers, reduction of sulfuric contamination and oil losses thanks to deeper oxidizing, increase of the concentration of vanadium in production solutions.