IMPROVED DEVICE FOR THE EXTRACTION OF SULPHUR COMPOUNDS BY MEANS OF LIQUID-LIQUID EXTRACTION USING A SODA SOLUTION, INCLUDING AN OPTIMISED FINAL SCRUBBING STEP

摘要

The invention relates to a method for extracting sulphur compounds from an LPG- or petrol-type hydrocarbon fraction, by means of liquid-liquid extraction with a soda solution, using a pre-treatment unit (2) for pre-treating the feedstock to be treated, placed upstream of the extraction unit (4), in which the soda is introduced into the extraction column (4) in the form of two circuits operating in parallel.