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Demetalization method for crude oil

A technology for demetallization and crude oil, which is applied in the field of hydrocarbon oil refining, can solve the problems of further improvement of demetallization rate, large amount of chemical agents, harsh reaction conditions, etc., and achieves the advantages of simple operation, simple equipment, low reaction temperature and pressure Effect

Active Publication Date: 2012-12-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the existing chemical demetallization technology has the disadvantages of large amount of chemical agents, complex process, high equipment requirements, harsh reaction conditions, etc., and its demetallization rate needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A domestic crude oil, metal content: nickel 33.5μg / g, vanadium 222.4μg / g, calcium 17.5μg / g, magnesium 1.6μg / g, iron 6.8μg / g.

[0029] Add 1700 μg / g dimethyl phosphite and 300 μg / g tert-butylbenzene peroxide to the crude oil, stir and mix at 130° C., and react for 180 minutes. Then add the polyether demulsifier ST-14 (purchased from Shandong Binzhou Chemical Group) of 100 μ g / g in crude oil, the water of 6% of crude oil quality, after making demulsifier, water and crude oil fully mix, under 140 ℃, 1500V / dehydration in an electric field of cm for 80 min to obtain a metal-free oil sample. The metal content of the oil sample was determined by inductively coupled plasma optical emission spectrometry, and the results are shown in Table 1.

[0030] Table 1

[0031] project

Embodiment 2

[0033] Test crude oil is identical with embodiment 1. The same method as in Example 1 was used to remove metals from crude oil, except that the amounts of dimethyl phosphite and tert-butylbenzene peroxide were both 15% of the amount in Example 1. The experimental results are shown in Table 2.

[0034] Table 2

[0035] project

Embodiment 3

[0037] Test crude oil is identical with embodiment 1. The same method as in Example 1 was used to remove metals from crude oil, except that the amount of dimethyl phosphite was 1940 μg / g, and the amount of tert-butylbenzene peroxide was 60 μg / g. The test results are shown in Table 3.

[0038] table 3

[0039] project

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PUM

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Abstract

The invention relates to a demetalization method for crude oil. The method includes that (1) phosphate ester, oil soluble peroxide and the crude oil are mixed and react for a period of time>=30 min at the temperature of 80-180 DEG C, the mass of the crude oil serves as a standard, use amount of phosphate ester is 80-10000 mu g / g, use amount of oil soluble peroxide is 5-2000 mu g / g, and nickel content and / or vanadium content >=5 mu g / g; and (2) the crude oil obtained in the step (1) is processed through electro-desalting processing. The method has the advantages of being high in demetalization rate, small in chemical agent use amount, mild in reaction conditions, simple in process and devices and the like and is especially suitable for crude oil with high content of nickel and vanadium.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil. Specifically, the present invention relates to a method for demetalling crude oil. Background technique [0002] With the deep exploitation of crude oil and the wide application of tertiary oil recovery technology, a large amount of heavy crude oil has been extracted, and the metal content of these crude oils, such as calcium, magnesium, sodium, iron, nickel, vanadium, copper, etc., is on the rise. Among the metal impurities in crude oil, nickel and vanadium are high in content and mostly exist in the form of porphyrin complexes and complex oil-soluble polymer compounds, and it is difficult to remove them in the process of electric desalting. Metal impurities in crude oil will have a negative impact on the secondary processing of crude oil, leading to catalyst poisoning, reduced activity, and increased reagent consumption, among which the hazards of nickel and vanadium are the most promin...

Claims

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Application Information

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IPC IPC(8): C10G53/02
Inventor 楚喜丽李本高沈明欢谭丽王振宇于丽
Owner CHINA PETROLEUM & CHEM CORP
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