TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Process: The process may include recycling the second mixture to mixing step, or separating the sulfur oligomers from the second mixture to obtain a stream which contains solvent and electrolyte and recycling the stream to mixing step. The first mixture is pre-treated by extractive distillation to recover a hydrocarbon fraction and a bottoms fraction, which is passed as the first mixture to the reactor.Preferred Parameters: The specific conditions include potential of 1-2.5 V versus silver/silver chloride reference electrode, and a current density of 1-10 A/cm2.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The hydrocarbon feed is an intermediate cat naphtha, preferably a mixture of light cat naphtha and intermediate cat naphtha. The solvent is ethylene carbonate, propylene carbonate, nitrobenzene, benzonitrile, N-formyl morpholine, and/or sulfolane. The electrolyte is tetraalkyl ammonium salt, e.g. tetraethyl-ammonium perchlorate, tetrabutyl-ammonium perchlorate, tetraethyl-ammonium tetrafluoroborate, tetrabutyl-ammonium tetrafluoroborate, tetraethyl-ammonium hexafluorophosphate, tetrabutyl-ammonium hexafluorophosphate, tetraethyl-ammonium paratoluene sulfonate, tetrabutyl-ammonium chloride, and/or tetrabutyl-ammonium bromide.    TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Apparatus: The electrochemical reactor utilizes platinum, stainless steel, or graphite for the cathode; and platinum, stainless steel, nickel, or graphite for the anode. EXAMPLE - N-formyl morpholine (144.83 g), tetra-n-butyl ammonium hexafluorophosphate (5.81 g), and light cat naphtha (boiling point of 170-365 degrees F, 25.71 g) were charged to a flask, heated to 57 degrees C and circulated through an electrochemical reactor for 6 hours. A homogenized sample of total liquid product was removed for analysis. Results showed that 56.7% thiophene, 41.9% 2-methylthiophene, 50.1% 3-methylthiophene, 100% benzothiophene and 73.5% total sulfur were removed from the naphtha.