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Compound demulsifying agent and method of use thereof

A composite demulsification and styrene technology, applied in chemical instruments and methods, dissolution, immiscible liquid separation, etc., can solve the problems of unsatisfactory demulsification effect of high asphaltene heavy oil

Active Publication Date: 2009-01-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some patents mention the combination of asphaltene dispersant and demulsifier to improve the desalination and dehydration effect. For example, USP6,120,678 provides a method for improving the demulsification effect with alkylphenolic resin as asphaltene dispersant, but its The provided demulsifier containing asphaltene dispersant does not have satisfactory demulsification effect on heavy oil with high asphaltene when the dosage is low

Method used

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  • Compound demulsifying agent and method of use thereof
  • Compound demulsifying agent and method of use thereof
  • Compound demulsifying agent and method of use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 9.8g of maleic anhydride and 60ml of toluene to the three-necked flask, dissolve it at 60°C, add 10.3g of styrene and 0.2g of dodecyl mercaptan, and add dropwise 0.24g of BPO dissolved in it at 80-90°C 40ml of toluene solution was reacted for 6h and then filtered, and the product was vacuum-dried at 80°C for 4h to obtain styrene-maleic anhydride copolymer (SMA).

[0024] Add 100ml of toluene to the three-necked flask, add 64g (0.032mol) of SMA, 8.6g of stearyl alcohol, and 0.5g of p-toluenesulfonic acid, react under reflux for 1h, install a water separator, reflux and divide water for 6h, and obtain the degree of esterification It is 90% styrene-maleic anhydride copolymer octadecyl ester (A).

Embodiment 2

[0026] Other conditions were the same as in Example 1, and 7 g of stearyl alcohol was added to obtain a styrene-maleic anhydride copolymer stearyl ester (B) with a degree of esterification of 72%.

Embodiment 3

[0028] Other conditions were the same as in Example 1, and 3.3 g of n-hexanol was added to obtain styrene-maleic anhydride copolymer n-hexyl ester (C).

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Abstract

The invention relates to a compound demulsifier and a use method thereof. The compound demulsifier comprises alkyl ester of styrene-maleic anhydride copolymer and ethylene oxide-propylene oxide block polymer, the mass ratio of which is 0.1 to 10: 1. The compound demulsifier of the invention, through compound use of the alkyl ester of styrene-maleic anhydride copolymer and the ethylene oxide-propylene oxide block polymer, can achieve better demulsification effect and is particularly applicable to the demulsification and dehydration of high-asphaltene viscous oil.

Description

technical field [0001] The invention relates to a composite demulsifier and its application method, more specifically to a composite demulsifier suitable for high asphaltene heavy oil and its application method. Background technique [0002] Crude oil production fluid contains a large amount of water and inorganic salts, which brings great difficulties to oil and gas gathering and transportation and crude oil refining, so dehydration and desalination must be carried out. [0003] Inorganic salts in crude oil production fluid include potassium, sodium, calcium, magnesium chloride salts, sulfates, carbonates, etc. These dissolved salts will be hydrolyzed at high temperature (340°C) to generate HCl, H 2 S and other inorganic acids cause corrosion of equipment, so these inorganic salts must be removed in the electric desalination stage. In the electric desalination process of the refinery, by injecting fresh water, the crude oil and fresh water are fully mixed, the inorganic s...

Claims

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Application Information

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IPC IPC(8): B01F17/52B01F17/36B01D17/05C09K23/52C09K23/36
Inventor 王振宇徐振洪汪燮卿李本高
Owner CHINA PETROLEUM & CHEM CORP
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