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Method for removing metal impurities from hydrocarbon raw material

A technology for metal impurities and hydrocarbon raw materials, which is applied in the field of removing metal impurities in hydrocarbon raw materials, can solve problems such as the inability to completely remove iron elements in hydrocarbon raw materials, and achieves the effects of low cost, simple operation and easy availability of raw materials

Active Publication Date: 2009-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method capable of completely removing iron in hydrocarbon raw materials in order to overcome the disadvantage that the demetallization method in the prior art cannot completely remove iron in hydrocarbon raw materials

Method used

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  • Method for removing metal impurities from hydrocarbon raw material
  • Method for removing metal impurities from hydrocarbon raw material

Examples

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preparation example Construction

[0021] The preparation method of the demetallization agent includes uniformly mixing the above-mentioned organic phosphonic acid and organic carboxylic acid, and the mixing may or may not include uniformly mixing the solubilizer with the above-mentioned organic phosphonic acid and organic carboxylic acid. The way of mixing is well known to those skilled in the art, and will not be repeated here.

[0022] The invention can demetallize various hydrocarbon raw materials containing metal impurities. The hydrocarbon raw material can be mineral oil and various fractions thereof, such as one of crude oil, atmospheric residue, vacuum residue, deasphalted oil, shale oil, lubricating oil, diesel oil, gasoline, and coal liquefied oil. species or several. The total content of metal impurities in the hydrocarbon feedstock is preferably 1-300 μg / g. The metal impurities may be one or more of iron, calcium, magnesium, zinc and sodium.

[0023] The present invention has no special limitatio...

Embodiment 1

[0030] This example is used to illustrate the method for removing metal impurities in hydrocarbon raw materials provided by the present invention.

[0031] Mix 35 parts by weight of citric acid, 10 parts by weight of oxalic acid, 10 parts by weight of formic acid, 15 parts by weight of maleic acid, and 30 parts by weight of hydroxyethylidene diphosphonic acid to obtain a metal removal agent containing organic carboxylic acid and organic phosphonic acid. Then, the above demetallizing agent was added to 52000 parts by weight of water and mixed uniformly to obtain a water injection with a demetallizing agent concentration of 0.192% by weight.

[0032] The hydrocarbon feedstock 1 shown in Table 1 below with a flow rate of 2 kg / h was preheated to 110° C. and fully mixed with the above-mentioned injection water with an injection rate of 200 g / h at a temperature of 150° C. and a pressure of 2.0 MPa. Then the resulting mixture containing demetallization agent and coked gasoline and di...

Embodiment 2

[0034] This example is used to illustrate the method for removing metal impurities in hydrocarbon raw materials provided by the present invention.

[0035] 20 parts by weight of citric acid, 10 parts by weight of oxalic acid, 10 parts by weight of acetic acid, 20 parts by weight of ethanol, 30 parts by weight of hydroxyethylidene diphosphonic acid, and 10 parts by weight of 2-hydroxyphosphinoacetic acid are mixed uniformly to obtain organic carboxylic acid, Demetallizer for organic phosphonic acids and solubilizers. Then, the above metal removal agent was added to 17000 parts by weight of water and mixed uniformly to obtain a water injection with a concentration of the metal removal agent of 0.588% by weight.

[0036] The hydrocarbon feedstock 2 shown in Table 1 below with a flow rate of 2 kg / h was preheated to 80°C and fully mixed with the above-mentioned injection water with an injection rate of 200 g / h at a temperature of 80°C and a pressure of 1.5 MPa. Then the resulting ...

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Abstract

A method for removing metal impurities in hydrocarbon raw materials, the method comprises contacting the hydrocarbon raw materials containing metal impurities with a metal removal agent, wherein the metal removal agent contains organic carboxylic acid and organic phosphonic acid. Because the method provided by the invention contains organic carboxylic acid and organic phosphonic acid, it can effectively remove the iron element in the hydrocarbon raw material, and the iron removal rate is as high as 95%. The demetallization method provided by the invention also has the advantages of low cost, readily available raw materials and simple operation, and can effectively remove various metal impurity elements. In addition, since the demetallization agent used in the present invention does not contain nitrogen, sulfur, chlorine, or metal elements, it will not cause harm to subsequent treatment processes such as catalytic hydrogenation.

Description

technical field [0001] The invention relates to a method for removing metal impurities in hydrocarbon raw materials. Background technique [0002] Metallic impurities in hydrocarbon raw oil have serious harm to the use and subsequent processing of hydrocarbon oil. When hydrocarbon oil containing metal impurities is used as fuel, it is easy to cause fouling in the combustion furnace, which affects heat transfer and can cause thermal corrosion. When these hydrocarbon oils are used as raw materials for catalytic cracking and hydrogenation processes, metal elements such as calcium, iron, sodium, magnesium, nickel, and vanadium will cause catalyst poisoning and fouling, reduce catalyst activity or completely inactivate it, and affect the normal operation of the device. Greatly increase operating costs. When used as a coking raw material, the ash content in petroleum coke is increased and the grade of petroleum coke is reduced. Demetallization becomes increasingly important as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G17/02
Inventor 李本高王振宇罗咏涛于丽
Owner CHINA PETROLEUM & CHEM CORP
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