Demulsifying agent and preparation method and use thereof

A demulsifier and unsaturated technology, used in chemical instruments and methods, chemical dehydration/demulsification, transportation and packaging, etc., can solve the problems of unsatisfactory demulsification effect, low efficiency, and large amount of demulsifier.

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

The first generation of demulsifiers appeared in the 1920s and 1930s, mainly low molecular weight anionic surfactants, including carboxylate, sulfate and sulfonate types. The advantages of this type of demulsifier It is cheap, but its disadvantages are large dosage (1000mg / L), low efficiency, and easy to be affected by electrolytes; in the 1940s and 1950s, the second generation of demulsifiers was developed, mainly low-molecular non-ionic surfactants, such as OP type , Tween-type surfactants. Although this type of demulsifier can resist acid, alkali and salt, the amount of demulsifier is still relatively large (300-500mg / L), and the demulsification effect is not ideal; it has developed since the 1960s. The third-generation demulsifiers are mainly polymer non-ionic surfactants, such as block copolymers of polyoxyethylene and polyoxypropylene. The advantage is that the dosage is small (5-100mg / L), and the disadvantage is that it is specific.
So far, there has been no report of introducing unsaturated acid into polyether, copolymerizing it with unsaturated acid and styrene, and using the resulting polymer as a demulsifier

Method used

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  • Demulsifying agent and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 10g of methanol and 1g of potassium hydroxide to the autoclave, pass nitrogen gas to remove oxygen, raise the temperature to 130°C, add 100g of propylene oxide dropwise, when the reaction pressure no longer decreases, cool down to 110°C, and add 200g of ethylene oxide dropwise , keep warm until the pressure no longer drops, and obtain diblock polyether D1A.

[0035] Add 15g nonylphenolic resin (molecular weight is 1090) and 0.9g potassium hydroxide in autoclave, dropwise add 36.2g propylene oxide, when reaction pressure no longer reduces, add dropwise 65.8g ethylene oxide again, control reaction temperature 130℃, pressure 2.3kg / cm 2 After the reaction of ethylene oxide is complete, 72.5g of propylene oxide is added at this temperature to obtain block polyether D1B.

[0036] Add 5g of tetraethylenepentamine, 2.4g of potassium hydroxide and 400g of propylene oxide into the autoclave, replace with nitrogen 2 to 3 times, raise the temperature to 115°C, keep the tempera...

Embodiment 2

[0038]Add 4.2g of acrylic acid, 50g of D1A polyether, 0.62g of p-toluenesulfonic acid, 0.012g of hydroquinone, and 60ml of toluene into the three-necked flask at one time, install a water separator, stir and heat up to 125-130°C, and reflux for 8h. The esterification product D2A solution was obtained.

[0039] Take the above D2A solution, add acrylic acid 9.3g, styrene 3.3g, benzoyl peroxide 3.1g, toluene 50ml, in N 2 Under ambient temperature and 85°C, react for 8 hours, and distill off the solvent to obtain the polymer product D3A.

Embodiment 3

[0041] Add 0.85g of acrylic acid, 100g of D1B polyether, 0.9g of p-toluenesulfonic acid, 0.0034g of hydroquinone, and 173ml of toluene to the three-necked flask at one time, install a water separator, and reflux for 8 hours to obtain the esterification product D2B solution.

[0042] Take the above D2B solution, add acrylic acid 4.3g, styrene 4.3g, benzoyl peroxide 3.0g, in N 2 Under ambient temperature and 85°C, react for 8 hours, and distill off the solvent to obtain the polymer product D3B.

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Abstract

The invention relates to a demulsifier, a preparation method thereof and the application thereof. The basic component of the demulsifier is a polymer, the molecular chain of the polymer is composed of segmers formed from copolymerization of styrene and unsaturated acid and polyether segmers; the two types of segmers are connected by ester bonds. Final products are obtained firstly through reaction of the unsaturated acid with polyether, in which unsaturated groups are induced and then through copolymerization of the polyether, the unsaturated acid and the styrene. The demulsifier of the invention is particularly applicable to the demulsification and dehydration of high-asphaltene viscous oil and is characterized by small dosage, quick dehydration and good demulsification effect.

Description

technical field [0001] The invention relates to a demulsifier and its preparation method and application. More specifically, the present invention relates to a demulsifier suitable for heavy oil with high asphaltenes, its preparation method and application. Background technique [0002] Heavy oil is a kind of unconventional oil resource. With the decrease of conventional thin oil reserves, heavy oil resources will become one of the important strategic alternative energy sources in my country. Heavy oil has the characteristics of high density, high viscosity, high content of asphaltene and colloid, for example, the content of asphaltene in Tahe crude oil is as high as 11%. Asphaltenes and colloids are natural water-in-oil emulsifiers, which can adsorb on the surface of water droplets to form a skin-like film and hinder the coalescence of water droplets. Therefore, the demulsification of heavy oil with high asphaltene has always been a difficult problem for people. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/52B01F17/36B01D17/05C10G33/04C09K23/52C09K23/36
Inventor 王振宇徐振洪汪燮卿李本高
Owner CHINA PETROLEUM & CHEM CORP
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