Deferrization method for hydrocarbons raw oil

A raw material oil and hydrocarbon technology, applied in the refined hydrocarbon oil, petroleum industry, etc., can solve problems such as increased carbon residue of regenerated catalysts, reduced catalyst activity, increased SOx emissions, etc., to achieve good iron removal effect and strong iron ion chelation combined ability effect

Active Publication Date: 2008-12-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 ca

Method used

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  • Deferrization method for hydrocarbons raw oil
  • Deferrization method for hydrocarbons raw oil
  • Deferrization method for hydrocarbons raw oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mixed acid (maleic acid, citric acid, EDTA molar ratio 1:1:1 preparation) and ammonia water to prepare iron removal agent (carboxylic acid and ammonia molar ratio 1:1), the raw oil is crude oil containing 41 ppm iron , The results are shown in Table 1.

Embodiment 2～4

[0026] Three different organic acids (polyacrylic acid, citric acid and oxalic acid) were mixed with ethylenediamine at a molar ratio of 2:1 to prepare iron removal agent. The effect of iron removal was investigated. The raw oil was crude oil with 32ppm iron. The results are shown in the table. 2 shown.

Embodiment 5～7

[0032] Compare the iron removal effect of the iron remover prepared by mixing citric acid and tetraethylenepentamine at a molar ratio of 3:1 at different reaction temperatures. The raw material oil is coker diesel oil with 29 ppm iron. The results are shown in Table 3.

[0033] Table 3 Deironing effect of coking diesel at different reaction temperatures

[0034]

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C10G29/20
Inventor 罗咏涛徐振洪于丽
Owner CHINA PETROLEUM & CHEM CORP
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