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Composite demetalization agent and preparation method thereof

A technology of demetallizer and dispersant, which is applied in the field of compound demetallizer for removing metals in crude oil and its preparation, can solve the problem of large dosage, and achieve the effect of promoting reaction and improving metal removal rate

Active Publication Date: 2013-06-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the complex demetallization agent in the prior art has almost no removal rate for metals such as nickel and vanadium in the form of porphyrin compounds, and also has problems such as large dosage, and provides a kind of metal removal agent that can remove crude oil calcium, Non-porphyrin metal compounds such as magnesium and iron, composite demetallization agent capable of removing porphyrin metal compounds such as nickel and vanadium and preparation method thereof, to achieve the purpose of improving metal removal rate in crude oil

Method used

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  • Composite demetalization agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 is the preparation method of the composite demetallizer, and Examples 2 to 7 are the demetallization test results of the composite demetallizer.

[0023] Example 1

[0024] Compounding any one of the organic acids with any one of the precipitation and chelating agents in different weight ratios is as follows:

[0025] T1: Glacial acetic acid: sodium hexametaphosphate = 1:1

[0026] T2: Glacial acetic acid: ammonium phosphate = 1:5

[0027] T3: citric acid: ethylenediaminetetraacetic acid = 2:5

[0028] T4: oxalic acid: sodium hexametaphosphate = 1:3

[0029] T5: methanesulfonic acid: sodium polyphosphate = 2:1

[0030] T6: fumaric acid: ammonium sulfate = 3:1

[0031] The preferred metal removal agent T1-T6, dispersant (FS1-dodecyltrimethylammonium chloride, FS2-dodecyltrimethylammonium bromide), cosolvent (R1-ethylene glycol butyl ether , R2-diethylene glycol butyl ether, R3-diethylene glycol monobutyl ether) and demulsifier (FC961) were mixed according...

Embodiment 2

[0035] Raw oil 1: a crude oil with a density of 920.2kg / m 3 , the salt content is 55 mg / l, the calcium content is 144.8 μg / g, the iron content is 38.4 μg / g, the nickel content is 14.3 μg / g, and the magnesium content is 8.5 μg / g. The metal content of crude oil before and after stripping was determined by inductively coupled plasma optical emission spectrometer (ICPOES).

[0036] 50g of the above crude oil was fully mixed with 0.30% by weight of composite demetallizing agent A and 6% by weight of water, and reacted at 80°C for 10 minutes. After the reaction, the oil was separated from water by electric desalting. After separation, 0.65% by weight of crude oil composite demetallization agent A and 6% by weight of water were added, stirred and reacted at 250° C. for 30 minutes, and after the reaction was completed, the mixed solution was taken out and separated from oil and water by electric desalination. The metal content analysis of the crude oil after demetallization showed th...

Embodiment 3

[0038] Raw material oil is with embodiment 2.

[0039] 100 g of the above-mentioned crude oil was fully mixed with 0.75% by weight of the composite demetallizing agent B of crude oil and 4% by weight of water, and reacted at 100° C. for 5 minutes. After the reaction, the mixture was separated from oil and water by electric desalination. After separation, 0.75% by weight of crude oil composite demetallization agent B and 8% by weight of water were added and stirred for 30 minutes at 300°C. After the reaction, the mixed solution was taken out and separated from oil and water by electrical desalination. The metal content analysis of the crude oil after demetallization showed that the calcium content was 1.3 μg / g, and the removal rate was 99.1%; the iron content was 0.9 μg / g, the removal rate was 97.6%, and the nickel content was 3.2 μg / g, The rate was 77.6%; the magnesium content was <0.05 μg / g.

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Abstract

The invention discloses a composite demetalization agent and a preparation method thereof. The composite demetalization agent solves the problem that the existing composite demetalization agent cannot remove porphyrin compounds of metals such as nickel and vanadium and has a large use amount. The composite demetalization agent comprises 10 to 80wt% of a demetalization agent, 1 to 20wt% of a dispersing agent, 1 to 20wt% of a cosolvent and 10 to 50wt% of a demulsifier. The demetalization agent is a mixture of an organic acid and any one of precipitators and chelating agents. The dispersing agent is dodecyl trimethyl ammonium chloride or dodecyl trimethyl ammonium bromide. The cosolvent is selected from ethylene glycol butyl ether, diethylene glycol butyl ether and diethylene glycol monobutyl ether.

Description

technical field [0001] The invention belongs to the field of crude oil processing, and more specifically relates to a composite demetallizer for removing metals in crude oil and a preparation method thereof. Background technique [0002] With the reduction of petroleum resources and the application of enhanced oil recovery technology, the content of metals in crude oil, especially heavy metals, has also increased, and the trend of crude oil deterioration is obvious. At present, the content of nickel and vanadium in Liaohe super heavy oil is as high as 200 μg / g, and the content of calcium reaches 348 μg / g. The content of heavy metals in Shengli heavy oil is also higher than 150 μg / g, and the content of calcium in Karamay heavy oil exceeds 254 μg / g. The content of nickel and vanadium alone in Tahe crude oil in Xinjiang is as high as 400 μg / g or more. The increase of metal content brings great harm to the processing of crude oil in the refinery. Calcium and iron in metal salt...

Claims

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Application Information

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IPC IPC(8): C10G29/20
Inventor 崔新安彭松梓李春贤申明周李朝法
Owner CHINA PETROLEUM & CHEM CORP
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