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Preparation method of crude oil rapid demulsifying agent

A demulsifier and rapid technology, applied in the field of preparation of crude oil rapid demulsifier, can solve the problems of large dosage, slow demulsification speed, and high demulsification temperature, and achieve the effects of being beneficial to environmental protection and improving safety

Active Publication Date: 2013-03-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies of the existing technology, in order to solve the problems of high demulsification temperature, slow demulsification speed and large dosage in the existing demulsification technology, the present invention provides a demulsifier with rapid demulsification ability for crude oil emulsion preparation method

Method used

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  • Preparation method of crude oil rapid demulsifying agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. Synthesis of polyether demulsifier A

[0028] (1) Synthesis of initiator phenolamine resin

[0029] Add 25g of bisphenol A and 82.5g of tetraethylenepentamine into a 500ml three-necked bottle, stir and raise the temperature to dissolve the bisphenol A. After the bisphenol A is completely dissolved, cool to 35°C, and dropwise add 37.5g with a mass fraction of 36%. formaldehyde solution, keep the temperature at 30-40°C, and keep it warm for 40 minutes after the dropwise addition is completed. Add 72.5g of xylene and raise the temperature to 100-110°C. Reflux reaction 2h. Slowly raise the temperature and take out the water under the condition of reflux. After all the water is evaporated, then evaporate the xylene to obtain the initiator phenolamine resin.

[0030] (2) Synthesis of polyether demulsifier A

[0031] Add 1g of the starter phenolamine resin and 1g of potassium hydroxide obtained in step (1) into the autoclave, seal the autoclave, start stirrin...

Embodiment 2

[0033] Embodiment 2. Synthesis of cross-linked demulsifier B

[0034] Add 10 g of the polyether demulsifier A prepared in Example 1 into a 25 ml single-necked bottle, and heat up to about 100° C. for vacuum dehydration. After the dehydration is completed, add 0.5 g of methyl ethoxy silicone oil and 0.07 g of oleic acid, and react under reduced pressure for 30 minutes. The reaction is terminated when the material becomes thick and silky. The reaction result is cross-linked demulsifier B.

Embodiment 3

[0035] Embodiment 3. Synthesis of cross-linked demulsifier C

[0036] As described in Example 2, the difference is that the feeding amount of methyl ethoxy silicone oil is changed to 1 g, the feeding amount of oleic acid is changed to 0.13 g, and the reaction result is cross-linked demulsifier C.

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Abstract

The invention relates to a preparation method of a crude oil rapid demulsifying agent. The method is that block copolymerization is carried out between initiator catecholamine resin and ethylene oxide and propylene epoxide to obtain a polyether demulsifying agent under a base catalyst, and then the polyether demulsifying agent is reacted with silicone oil and oleic acid to obtain a crosslinking demulsifying agent. The preparation method solves the problem that the existing demulsifying technology is high in demulsifying temperature, low in demulsifying speed, big in dosage and the like. The crude oil rapid demulsifying agent prepared by using the method has the advantages of rapid demulsification, small dosage, environmental protection and the like.

Description

technical field [0001] The invention relates to a preparation method of a rapid demulsifier for crude oil, belonging to the technical field of petroleum processing. Background technique [0002] In the process of crude oil extraction, crude oil and water flow from the formation to the surface through the oil pipeline at the same time, and finally are transported to the oil storage tank through the pipeline. During this process, crude oil and water flow through injectors, valves, elbows, and pipes, and undergo severe mechanical shear to form emulsions. When the pumping unit is used for mining, the piston of the pumping unit shears the crude oil and water more intensely, so it is easier to form an emulsion. [0003] Crude oil itself is a multi-component mixture consisting of hydrocarbons with different relative molecular masses and different structures and a small amount of non-hydrocarbon compounds. Inorganic salts, mechanical impurities, sand, clay, and free hydrogen sulfi...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08J3/24C08L71/00C10G33/04
Inventor 谭业邦殷硕李仲伟
Owner SHANDONG UNIV
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