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Acid-containing crude oil demulsifying agent and preparation method thereof

A crude oil demulsifier and demulsifier technology, applied in chemical instruments and methods, chemical dehydration/demulsification, dissolution, etc., can solve the problems of poor adaptability of crude oil, inability to solve desalination and dehydration, oily drainage, low demulsification efficiency, etc. , to achieve the effects of inhibiting emulsification, good demulsification, dehydration and desalination

Active Publication Date: 2013-08-14
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the above-mentioned demulsifiers are simple compound demulsifiers or single polymer demulsifiers, which have problems such as poor adaptability to crude oil, low demulsification efficiency, and easy corrosion, and cannot solve the problems of desalination, dehydration and drainage of inferior crude oil. question

Method used

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  • Acid-containing crude oil demulsifying agent and preparation method thereof
  • Acid-containing crude oil demulsifying agent and preparation method thereof
  • Acid-containing crude oil demulsifying agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1 is the composition and preparation method of the acid-containing crude oil demulsifier, and Examples 2 to 4 are the evaluation of the demulsification, desalination and dehydration effect of the acid-containing crude oil by the demulsifier.

[0032] The specific method of demulsifier evaluation is as follows: dilute the demulsifier into a 1% aqueous solution; take 50 g of crude oil and add it to a 100 ml desalting tank, add 2 to 4 ml of water (4 to 8%) and measure the demulsifier; Under the conditions of 800V / cm and 200 times of shaking and mixing, electric desalting was carried out for 30 minutes. After cooling, the salt content and water content of the crude oil were analyzed. The water content analysis is determined by the national standard GB260 method, and the salt content analysis is determined by the national standard GB6532 method.

[0033] Example 1

[0034] According to diethylenetriamine: ethylene oxide: propylene oxide weight ratio is 1: 150: 300 t...

Embodiment 2

[0039] Evaluate the effect of demulsifier on demulsification, desalination and dehydration of Shengli high-sulfur and high-acid crude oil. The density of Shengli high-sulfur and high-acid crude oil is 0.944g / cm 3 , the acid value is 2.50 mgKOH / g, the sulfur content is 1.8 (weight) %, and the salt content is 130 mgNaCl / L. The experimental results are shown in Table 2.

[0040] Table 2 Electrode-salting effect of demulsifier on Shengli high-sulfur and high-acid oil

[0041]

Embodiment 3

[0043] Evaluate the effect of desalting agent on demulsification, desalination and dehydration of Brazilian Malim crude oil, the density of Malim crude oil is 0.9336g / cm 3 , the acid value is 2.32 mgKOH / g, the sulfur content is 0.77 (weight) %, and the salt content is 130 NaCl / mg / L. The experimental results are shown in Table 3.

[0044] Table 3 The effect of demulsifier on the electric desalination of Malim crude oil

[0045]

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Abstract

The invention discloses an acid-containing crude oil demulsifying agent and a preparation method thereof. The effects of eliminating oil water emulsification, reaching deep desalination and dehydration and reducing oil in drained water are achieved. The demulsifying agent consists of 30 to 60 weight percent of polyvinyl polyamine polyoxyethylene polyoxypropylene ether, 1 to 10 weight percent of emulsifying inhibitor, 1 to 10 weight percent of flocculating agent, 1 to 15 weight percent of dispersion cosolvent and 20 to 50 weight percent of solvent. The demulsifying agent can be used for electric desalination and dehydration processes of acid-containing crude oil and acidified crude oil, the adding amount is 10 to 100mug / g, the salt content of the acid-containing crude oil after electric desalination can be reduced to be less than 3mgNaCl / L, and the water content can be reduced to be less than 0.3 weight percent.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and more specifically relates to a demulsifier suitable for the electric desalting process of crude oil in an oil refinery and a preparation method thereof. Background technique [0002] In recent years, with the development of heavy and low-quality crude oil in the world, the output of low-quality acid-containing and high-acid crude oil is increasing, and there is a trend of increasing year by year. This type of crude oil usually has the following characteristics: (1) high density, high acid value, and natural emulsifier naphthenic acid and its salts; (2) high content of colloids and asphaltenes, and inorganic salts in crude oil are easily encapsulated; (3) Contains chemical oil recovery additives, resulting in severe emulsification of crude oil. It is precisely because of the above-mentioned characteristics of low-quality high-acid crude oil that the difficulty of electrical desalting of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04B01F17/42C09K23/42
Inventor 彭松梓段永锋李春贤申明周于凤昌王红梅崔新安
Owner CHINA PETROCHEMICAL CORP
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