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Crude oil desalting composition and method of use thereof

A composition and desalination technology, which is applied in the fields of hydrocarbon oil dehydration/demulsification, petroleum industry, refined hydrocarbon oil, etc., can solve the problems affecting the normal operation of the electric desalination process, the inability to effectively separate oil and water, and the current increase of the electric desalination process , to achieve significant demulsification and desalination effects, strengthen the effect of electric field, and destroy the stability

Active Publication Date: 2008-06-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It has been found that only using demulsifiers in the electric desalination process cannot effectively achieve oil-water separation.
Especially for acid-containing low-quality crude oil, it is difficult to make the quality of processed products meet the requirements by simply using demulsifiers for desalination and dehydration
At the same time, when the demulsifier is only used in the desalination process, if the demulsification effect does not meet the requirements, it will also cause the current to increase and the voltage to decrease in the electrical desalination process. Normal operation of the desalination process

Method used

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  • Crude oil desalting composition and method of use thereof
  • Crude oil desalting composition and method of use thereof
  • Crude oil desalting composition and method of use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of desalination composition 1

[0037] Desalination Composition 1 was prepared by mixing the following components (A), (B) and (C) in the ratio given below.

[0038]

[0039] Sour crude oil desalting using desalting composition 1

[0040] The acid-containing heavy oil and kerosene in the ninth district of Karamay were prepared according to the volume ratio of 7:3 to prepare the experimental oil (salt content 4.4mg / L NaCl, calcium content 154ppm). Based on the quality of the oil used in the experiment, 10% water injection and the desalination composition used in the amount shown in Table 1 below were formulated into an aqueous solution. The prepared aqueous solution and the raw material oil preheated to 90-100°C were thoroughly mixed for 20 seconds on a commercially available fruit juice blender, and then poured into a conical glass desalination tank. The DP-II electric desalination demulsifier is used for oil-water separation, the electric field gradien...

Embodiment 2

[0045] Preparation of desalination composition 2

[0046] The desalting composition 2 was prepared by mixing the following components (A), (B) and (C) in the ratio given below.

[0047]

[0048] Sour crude oil desalting using desalting composition 2

[0049] Liaohe heavy oil and kerosene were prepared in a volume ratio of 8:2 to prepare experimental oil (salt content 29mg / LNaCl, calcium content 360ppm). Desalting was performed according to the method of Example 1 using desalting composition 2. The measurement results are shown in Table 2.

[0050] Table 2 Desalting treatment results of Liaohe heavy oil / kerosene mixed oil by desalting composition 2

[0051]

[0052] Note: The qualified standards for water content and salt content in crude oil are water content ≤ 0.2%, salt content ≤ 3mg / L NaCl.

Embodiment 3

[0054] Preparation of desalination composition 3

[0055] The desalination composition 3 was prepared by mixing the following components (A), (B) and (C) in the ratio given below.

[0056]

[0057] Sour crude oil desalting using desalting composition 3

[0058] The oil used in the experiment was Dagang oil (salt content 23.1mg / L NaCl, calcium content 15ppm). Desalting was performed according to the method of Example 1 using desalting composition 3. The measurement results are shown in Table 3.

[0059] Table 3 desalination composition 3 to the desalination treatment result of Dagang Oil

[0060]

[0061] Note: The qualified standards for water content and salt content in crude oil are water content ≤ 0.2%, salt content ≤ 3mg / L NaCl.

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Abstract

The invention provides a crude oil desalinization compound, comprising the following components by weight percent: 0 to 95 percent of emulsifying agent, 1 to 90 percent of one or more than one carboxylic acid plymer, or one or more than one organic phosphine compound or the mixture of the organic phosphine compound and 4 to 94 percent of solvent. The invention also provides a method of desalinating the crude oil, particular the acid containing crude oil, by using the desalinization compound. The invention is suitable for the desalinization of the crude oil, particular the acid containing crude oil and the inferior high acid number and high salt crude oil.

Description

technical field [0001] The invention relates to a crude oil desalting composition, a preparation method thereof, and a method for desalting crude oil, especially acid-containing crude oil, using the desalting composition. Background technique [0002] The presence of salt in crude oil will cause corrosion to equipment including atmospheric towers, which will have a serious impact on subsequent processing. Therefore, these salts must be removed during the electro-desalination stage. [0003] Electric desalting process is a common method for removing salt from crude oil. The method uses electric, thermal and chemical means to combine demulsification (that is, by adding a suitable demulsifier, the water / oil emulsion formed by mixing oil-water is effectively demulsified under certain temperature and electric field conditions), to achieve oil demulsification. , Water separation, so as to achieve the purpose of removing salt and water in crude oil. [0004] The selection and us...

Claims

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Application Information

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IPC IPC(8): C10G33/00C10G29/20
Inventor 徐振洪王振宇于丽谭丽罗咏涛李本高
Owner CHINA PETROLEUM & CHEM CORP
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