Deferrization method for hydrocarbons raw oil

Abstract

The invention provides a method for removing iron from hydrocarbon feed oil, which comprises the following steps: (1) fully mixing iron-containing hydrocarbon feed oil with iron removing agent solution and reacting; and (2) separating oil-water mixture to remove the majority of iron in hydrocarbon feed oil. The iron removing agent contains a component A and a component B, wherein the component A is selected from one or more of C2 to C6 polycarboxylic acids, C2 to C8 hydroxycarboxylic acids and water-soluble maleic acid and acrylic acid polymer; and the component B is selected from one or more of ammonia, inorganic or organic ammonium compound, C2 to C8 linear alkyl-amines, cycloalkyl amines or alcohol amines, and polyethylene-polyamines with molecular weight of 100 to 5,000. The iron removing agent prepared from nitrogen-containing compound and organic acid by mixing has higher iron ion chelating ability and can achieve better iron removal effect in shorter reaction time and at lower reaction temperature.

Description

Technical field [0001] The invention relates to a method for removing iron from hydrocarbon feedstock oil. Background technique [0002] In recent years, with the continuous increase in the processing volume of sour crude oil, high acid crude oil and residual oil, the iron poisoning of catalytic cracking catalysts has attracted more and more attention. The serious impact of increased polluting iron on the catalytic cracking equilibrium catalyst is manifested in the decrease of catalyst activity and the decrease of residual oil cracking capacity, the increase of SOx emissions and the increase of regenerated catalyst carbon residue (for partial regeneration), and the decrease of apparent catalyst bulk density. . In the residual oil hydrogenation process and the distillate hydrorefining process, the iron ions in the distillate oil and the residual oil cause the catalyst activity to decrease or even deactivate. [0003] Iron exists in the form of suspended inorganic matter in petrole...

AI Technical Summary

Problems solved by technology

The serious impact of the increase of contaminated iron on the catalytic cracking equilibrium catalyst is manifested in the decrease of catalyst activity and the decrease of residual oil cracking ability, the increase of SOx emission and the increase of carbon residue of regenerated catalyst (for partial regeneration), and the decrease of apparent bulk density of catalyst, etc.

In the hydrogenation process of residue oil and distillate oil hydrotreating process, the iron ions in distillate oil and residue oil cause the catalyst activity to decrease or even deactivate

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