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US 4,789,463 AGranted
Demetalation of hydrocarbonaceous feedstocks using hydroxo-carboxylic acids and salts thereof
AssigneeChevron Research Company
InventorJohn G. Reynolds
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Abstract
A process is disclosed for removing metals contaminants, particularly iron, and more particularly non-porphyrin, organically-bound iron compounds, from hydrocarbonaceous feedstock, particularly crude petroleum or residua. The process comprises mixing the feedstock with an aqueous solution of hydroxo-carboxylic acids or salts thereof, preferably citric acid, and separating the aqueous solution and metals from the demetalated feedstock.
Claims13
An aqueous extraction method for demetalizing Group VIII metals from hydrocarbonaceous feedstock, said process comprising:
- mixing said hydrocarbonaceous feedstock with an aqueous solution of a metals sequestering agent comprising hydroxocarboxylic acids, salts thereof, or mixtures thereof;
- and
- separating the substantially demetalated hydrocarbonaceous feedstock from the aqueous solution;
- wherein the feedstock to be demetalated is selected from the group consisting of crude petroleum, atmospheric or vacuum residua, solvent deasphalted oil derived from these crudes or residua, shale oil, liquefied coal, and tar sand effluent.
1 more element
Dependencies are inferred from the claim text.