24 hours uv visible spectra were obtained of the feedstock at 0 4 19 and 24 hours and these spectra are shown in fig3 the porphyrin absorption band clearly diminishes over the time of the reaction indicating that porphyrin conversion is taking place the conversion rate is estimated at 44 for the 24 hours period further this conversion is obtained at non severe conditions this example was conducted using a commercialized porphyrin 5 10 15 20 tetraphenyl 21h 23h porphine oxides vanadyl iv 151 ppm as a model molecule the palladinized palladium sheet used in this example was the same as was used in example 1 operating conditions for the demetallization or vanadium porphyrin conversion reaction were as follows electrolyte medium naoh 0 1m current density u2212 31 ma cm 2 cathode palladium black cathode thickness 0 125 mm anode platinum mesh reaction temperature 20 u00b0 c feedstock 100 ml of dichloromethane with 151 ppm vanadium porphyrin electrolysis time 24 hours uv visible spectra were again obtained and are shown in fig4 the uv visible spectra clearly show that the porphyrin absorption band diminishes as the reaction time proceeds porphyrin conversion for this reaction is estimated at 38 over the 24 hour period this demonstrates that the process of the present invention is effective at large and small amounts of metalloporphyrins in the feedstock this indicates that the process can be coupled to conventional refining processes in order to avoid all the various problems related to metal content in the oil fractions this example was conducted using porphyrin 5 10 15 20 tetraphenyl 21h 23h porphine oxides vanadyl iv 4 ppm the palladinized.