Method for demetallating petroleum streams

B - Operations – Transporting – 01 – D

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B01D 17/06 (2006.01) C10G 32/02 (2006.01)

Patent

CA 2294311

A method of decreasing the metals content of metal containing petroleum streams (4) by forming a mixture of the petroleum fraction containing those metals and an aqueous electrolysis medium containing electron transfer agent, and passing an electric current through the mixture or through the pretreated aqueous electrolysis medium at a voltage, sufficient to remove the metals such as Ni, V and Fe from the stream (3) (i.e., to produce a petroleum fraction having decreased content of the metals). The cathodic voltage is from 0 V to - 3.0 V vs. SCE. The invention provides a method of enhancing the value of petroleum feeds that traditionally have limited use in refineries due to their metals, e.g., Ni and V content.

La présente invention concerne un procédé de réduction de la teneur en métaux de flux de pétrole (4) contenant des métaux, qui consiste à mélanger la fraction de pétrole contenant lesdits métaux avec un milieu d'électrolyse aqueux qui contient un agent de transfert d'électrons et à faire passer un courant électrique à travers le mélange ou le milieu d'électrolyse aqueux prétraité, avec une tension suffisante pour éliminer les métaux tels que le nickel (Ni), le vanadium (V) et le fer (Fe) du flux (3) (c'est-à-dire à produire une fraction de pétrole dont la teneur en métaux est réduite). La tension cathodique se situe entre 0 V à -3,0 V avec une électrode au calomel saturée (SCE). La présente invention concerne également un procédé de valorisation des charges de pétrole dont l'usage est traditionnellement limité aux raffineries à cause de leur teneur en métaux, par, exemple la teneur en Ni et V.

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