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Quick petroleum deemulsifier and preparation method thereof

A crude oil demulsifier, rapid technology, applied in the direction of chemical dehydration/demulsification, etc., to achieve the effect of low process equipment requirements and simple operation

Active Publication Date: 2012-07-04
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chemical demulsifiers have strong selectivity

Method used

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  • Quick petroleum deemulsifier and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1, the synthesis of demulsifier A

[0027] (1) Synthesis of polyether

[0028] Using tetraethylenepentamine as the starting agent, the polyether DA01 is obtained by alkoxylation with propylene oxide and ethylene oxide successively under the catalysis of potassium hydroxide; among them, tetraethylenepentamine, potassium hydroxide, The masses of propylene oxide and ethylene oxide are 0.5 gram, 0.5 gram, 150 gram and 50 gram respectively.

[0029] Polyether RF01 is a polyether RF01 obtained by alkoxylation reaction with propylene oxide and ethylene oxide successively with nonylphenol as the initiator under the catalysis of potassium hydroxide; among them, nonylphenol, potassium hydroxide, epoxy The masses of propane and ethylene oxide are 0.5 gram, 0.5 gram, 100 gram and 50 gram respectively.

[0030] Using diethanolamine as the initiator, under the catalysis of potassium hydroxide, polyether CA01 is obtained by alkoxylation reaction with propylene oxide and e...

Embodiment 2

[0037] Embodiment 2, the synthesis of demulsifier B

[0038] Stir 10 grams of polyethylene polyamine polyether acrylate ZDA01, 100 grams of nonylphenol polyether acrylate ZRF01, 50 grams of diethanolamine polyether acrylate ZCA01, 100 grams of methacrylic acid, 40 grams of butyl acrylate and 500 grams of water Mix, use 2 grams of potassium persulfate to initiate free radical polymerization under anaerobic conditions at 80°C, and stop the reaction with 5 grams of ferrous sulfate after 3 hours to obtain demulsifier B.

Embodiment 3

[0039] Embodiment 3, the synthesis of demulsifier C

[0040] Stir 100 grams of polyethylene polyamine polyether acrylate ZDA01, 50 grams of nonylphenol polyether acrylate ZRF01, 50 grams of diethanolamine polyether acrylate ZCA01, 100 grams of methacrylic acid, 10 grams of butyl acrylate and 800 grams of water Mix, use 3 grams of potassium persulfate to initiate free radical polymerization under anaerobic conditions at 80°C, and terminate the reaction with 10 grams of ferrous sulfate after 2 hours to obtain demulsifier C.

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Abstract

The invention discloses a quick petroleum deemulsifier and a preparation method thereof. The method comprises the following steps of: (1) performing esterification reaction on polyethylene polyamine, nonylphenol ethoxylates, and diethanol amine polyether with acryloyl chloride respectively to obtain acrylic acid polyethylene polyamine polyether ester, acrylic acid nonylphenol polyether ester, and acrylic acid diethanol amine polyether ester respectively; and (2) performing free radical polymerization reaction on the acrylic acid polyethylene polyamine polyether ester, acrylic acid nonylphenol polyether ester, acrylic acid diethanol amine polyether ester, methacrylic acid, and butyl acrylate in water in presence of initiator under the anaerobic condition, and performing termination reaction by using a terminator to obtain the quick petroleum deemulsifier. The deemulsifier has high dehydration rate in a very short time period, and is suitable for development of offshore oil fields; and the preparation method has the characteristics of low requirement on processing equipment and is easy to operate.

Description

technical field [0001] The invention relates to a rapid crude oil demulsifier and a preparation method thereof, belonging to the technical field of petroleum processing. Background technique [0002] In recent years, the development of most domestic oilfields has entered a period of high water cut. The application of various extraction technologies makes crude oil mostly produced in the form of emulsion. It is generally believed that the stability of emulsions is mainly determined by the properties of the oil-water interface. In the crude oil emulsion, the emulsifier is adsorbed on the oil-water interface to form a viscoelastic interfacial film with a certain strength, which causes the emulsion droplets to coalesce and cause different degrees of dynamic obstacles. These film-forming substances are mainly colloids, asphaltene, solid paraffin, petroleum acid soap and oil displacement agents for tertiary oil recovery. The higher their content in the crude oil, the better the...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 檀国荣张健
Owner CHINA NAT OFFSHORE OIL CORP
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