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Compound demulsifying agent capable of improving demulsifying effect of polyether demulsifying agents

A polyether demulsifier and demulsifier technology, applied in immiscible liquid separation, liquid separation, chemical instruments and methods, etc., can solve the problem of poor broad-spectrum adaptability, unsatisfactory demulsification effect, and unsatisfactory demulsification effect. and other problems, to achieve the effect of fast dehydration rate, ideal dehydration effect and less dosage

Inactive Publication Date: 2016-07-20
JURONG NINGWU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the demulsifiers used in domestic oil fields are mainly polyether demulsifiers, but the demulsification effect of this type of demulsifier is not ideal when used alone, and the broad-spectrum adaptability to different crude oil products is poor, and the demulsification effect cannot meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A compound demulsifier for improving the demulsification effect of polyether demulsifiers is obtained by the following method:

[0014] 1) Add 30 grams of polyethylene polyamine and 6 grams of potassium hydroxide into the reactor with a stirring and condensing device, heat up, feed 240 grams of propylene oxide, and control the temperature at 115~145 o C. Under the pressure of 0.4MPa, make it fully react, vacuum for 30 minutes, feed 320 grams of ethylene oxide under the same conditions, after fully reacting, make 600 grams of polyether demulsification.

[0015] 2) Dissolve 600 grams of the above-mentioned polyether demulsifier and 80 grams of high-efficiency flocculant polyacrylamide in 320 grams of methanol, and then stir evenly to obtain a compound demulsifier.

Embodiment 2

[0017] A compound demulsifier for improving the demulsification effect of polyether demulsifiers is obtained by the following method:

[0018] 1) Add 20 grams of pentaerythritol and 4 grams of potassium hydroxide into the reactor with a stirring and condensing device, heat up, feed 160 grams of propylene oxide, and control the temperature at 115~145 o C. Under the pressure of 0.4MPa, make it fully react, vacuum for 30 minutes, feed 210 grams of ethylene oxide under the same conditions, after fully reacting, make 400 grams of polyether demulsification.

[0019] 2) Dissolve 400 grams of the above-mentioned polyether demulsifier and 45 grams of high-efficiency flocculant polyacrylamide in 300 grams of methanol, and then stir evenly to obtain a compound demulsifier.

Embodiment 3

[0021] A compound demulsifier for improving the demulsification effect of polyether demulsifiers is obtained by the following method:

[0022] 1) Add 35 grams of phenolamine resin and 6 grams of potassium hydroxide into the reactor with a stirring and condensing device, heat up, feed 280 grams of propylene oxide, and control the temperature at 115~145 o C. Under the pressure of 0.4MPa, make it fully react, vacuum for 30 minutes, feed 350 grams of ethylene oxide under the same conditions, after fully reacting, make 600 grams of polyether demulsification.

[0023] 2) Dissolve 671 grams of the above-mentioned polyether demulsifier and 78 grams of the high-efficiency flocculant polyacrylamide in 480 grams of methanol and stir evenly to obtain a compound demulsifier.

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PUM

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Abstract

The invention discloses a compound demulsifying agent capable of improving the demulsifying effect of polyether demulsifying agents. The compound demulsifying agent is prepared through the method which includes the following steps that firstly, polyether demulsifying agents with different initiators are prepared, the initiators and a basic catalyst are added into a reactor with a stirring and condensing device, heating is carried out, epoxypropane is introduced, the mixture is fully reacted with the temperature controlled to be 115-145 DEG C and the pressure controlled to be 0.4 MPa, vacuum pumping is carried out for 30 min, ethylene oxide is introduced under the same condition, and after the mixture is fully reacted, the polyether demulsifying agents are obtained, wherein with the raw materials of the initiators, epoxypropane and ethylene oxide 100% by weight, the initiators account for 0.4-6% of the total weight, epoxypropane accounts for 30-65.6% of the total weight, ethylene oxide accounts for 20-50% of the total weight, and the dosage of the basic catalyst accounts for 0.1-5% of the total weight; secondly, the prepared polyether demulsifying agents and a flocculating agent are dissolved with a solvent and then stirred evenly, and the compound demulsifying agent is obtained, wherein the polyether demulsifying agents account for 40-70%. The obtained flocculating agent-demulsifying agent has the advantages of being small in dosage, high in dewatering rate, ideal in dewatering effect and the like.

Description

technical field [0001] The invention relates to a demulsifier, in particular to a compound demulsifier for improving the demulsification effect of polyether demulsifiers. Background technique [0002] Due to the application of water flooding oil recovery technology, the water content of oilfield produced fluid is increasing continuously, and the emulsion is more stable, which aggravates the task of demulsification and dehydration of emulsified crude oil. If it is not dehydrated in time, it will cause corrosion to pumps and transportation pipelines, so it must be dehydrated before crude oil is transported. The free water in crude oil can be easily removed by natural sedimentation, while the removal of emulsified water generally requires the addition of demulsifiers. At present, the demulsifiers used in domestic oil fields are mainly polyether demulsifiers, but the demulsification effect of this type of demulsifier is not ideal when used alone, and the broad spectrum adaptabi...

Claims

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Application Information

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IPC IPC(8): B01D17/05
CPCB01D17/047
Inventor 应珏朱夏翟洪金李怀阁陈杰王飞贡严军张学成季杰
Owner JURONG NINGWU CHEM
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