Demetallization of hydrocarbons
AssigneeHaldor TopsøE A/S
InventorsRasmus Gottschalck Egeberg, Angelica Hidalgo Vivas, Søren Selde Enevoldsen
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Abstract
The present disclosure refers to a process and a process plant for extraction of metals from a hydrocarbon mixture obtained from a gasification or pyrolysis process, comprising the steps of combining said hydrocarbon mixture with an aqueous acid forming a mixture, mixing said mixture, separating said mixture in a contaminated aqueous phase and a purified hydrocarbon phase, with the associated benefit of said aqueous acid being able to release metals bound in such gasification and pyrolysis processes.
Claims19
A process for producing a hydrotreated hydrocarbon from a hydrocarbon mixture obtained from a gasification or pyrolysis process or from an oxygenate mixture of biological origin, said hydrocarbon mixture having an acidity number above 1.5 mg KOH/g, comprising the steps of:
- a. combining said hydrocarbon mixture with an aqueous acid forming a mixture,
- b. mixing said mixture,
- c. separating said mixture in a contaminated aqueous phase and a purified hydrocarbon phase,
- d. combining said purified hydrocarbon phase with a gas rich in hydrogen forming a hydroprocessing stream, and
- e. directing said hydroprocessing stream to a hydroprocessing step forming a hydrotreated hydrocarbon,
- wherein the process does not comprise a step of addition of an aqueous liquid comprising elements other than C, H, O, N and S in a concentration above 0.1% such that neither the aqueous acid, nor any other aqueous additive, would comprise other elements than C, H, O, N or S above 0.1%.
A process plant for production of a purified hydrocarbon from a tar feedstock comprising:
- a. an acid wash reactor having one or more inlets in fluid communication with a tar feedstock inlet and with a acid inlet and having an outlet,
- b. a means for phase separation having an inlet, a aqueous phase outlet, and a purified hydrocarbon phase outlet,
- c. a gasifier or pyrolysis section having a solid carbonaceous fuel inlet, a water inlet and optionally an oxidant inlet, a synthesis gas outlet and a tar outlet,
- wherein the outlet of said acid wash reactor is in fluid communication with the inlet of said means for phase separation, and
- wherein said tar outlet is in fluid communication with said tar feedstock inlet.
Dependencies are inferred from the claim text.