Demulsifying agent suitable for high water content crude oil, and preparation method thereof

A crude oil demulsifier and starting agent technology, which is applied in the fields of chemical dehydration/demulsification, petroleum industry, treatment of hydrocarbon oil, etc. Dehydration cost increase and other problems, to achieve the effect of good dehydration effect, improved effect and wide range of use

Inactive Publication Date: 2018-02-23
JURONG NINGWU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water content in the crude oil produced in many oilfields increases year by year, and various residual chemical agents in the crude oil after sewage reinjection make the demulsification and dehydration of emulsified crude oil more complicated and difficult. The dehydration effect of ordinary polyether demulsifiers is not ideal. Increasing the dosage is still difficult to solve the problem, which leads to the increase of the dehydration cost of the crude oil emulsion and the reduction of the dehydration effect, and also has many adverse effects on the crude oil transportation process and the oil refining in the refinery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 1 part of bisphenol A and 0.5 part of sodium hydroxide into a reactor with a stirring and condensing device, heat up and feed 30 parts of propylene oxide, control the temperature at 115 °C and the pressure at 0.15 MPa to make it fully react , Vacuum for 30 minutes, pass 25 parts of epichlorohydrin under the same conditions, and vacuum for 30 minutes after fully reacting to prepare a diblock demulsifier suitable for high water content crude oil.

Embodiment 2

[0019] Add 5 parts of bisphenol A and 2 parts of sodium hydroxide into the reactor with a stirring and condensing device, heat up to raise the temperature, pass 50 parts of propylene oxide, control the temperature at 130°C and the pressure at 0.4MPa to make it fully react , Vacuum for 30 minutes, pass 48 parts of epichlorohydrin under the same conditions, and vacuum for 30 minutes after fully reacting to prepare a diblock demulsifier suitable for high water content crude oil.

Embodiment 3

[0021] Add 10 parts of bisphenol A and 4 parts of sodium hydroxide into the reactor with a stirring and condensing device, heat up the temperature, feed 70 parts of propylene oxide, control the temperature at 145 °C and the pressure at 0.4 MPa to make it fully react , Vacuum for 30 minutes, pass 65 parts of epichlorohydrin under the same conditions, and vacuum for 30 minutes after fully reacting to prepare a diblock demulsifier suitable for high water content crude oil.

[0022] When the demulsifier prepared in the above examples is used in an amount of 20 mg / L, the demulsification effect can reach more than 95%.

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PUM

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Abstract

The invention discloses a demulsifying agent suitable for high water content crude oil, and a preparation method thereof. The demulsifying agent suitable for high water content crude oil comprises, byweight, 1 to 10 parts of a starting agent with a molecular structure containing phenyl rings and reactive hydrogen, 30 to 70 parts of epoxypropane, 25 to 65 parts of a novel epoxy compound, and 0.5 to 4 parts of a basic catalyst. According to the preparation method, conventional oxirane is replaced by epoxypropane and epoxy chloropropane, and segmented polymerization is adopted, so that the demulsifying agent possesses following advantages: using amount is small, dehydration effect is excellent, removed water is clear, and application range is wide.

Description

technical field [0001] The invention relates to a demulsifier, in particular to a demulsifier suitable for high water content crude oil and a preparation method thereof. Background technique [0002] Demulsifiers are indispensable chemical additives for all oil fields. At present, polyether demulsifiers are mainly used in China. Most of these demulsifiers use active hydrogen-containing compounds as initiators. Carry out anionic ring-opening polymerization reaction to prepare polyoxyethylene polyoxypropylene ether demulsifier. However, the water content in the crude oil produced in many oilfields increases year by year, and various residual chemical agents in the crude oil after sewage reinjection make the demulsification and dehydration of emulsified crude oil more complicated and difficult. The dehydration effect of ordinary polyether demulsifiers is not ideal. Increasing the dosage is still difficult to solve the problem, which leads to the increase of the dehydration cos...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C08G65/28C10G33/04
CPCC08G65/2612C10G33/04C10G2300/1033
Inventor应军李怀阁翟洪金陈杰倪小明
OwnerJURONG NINGWU CHEM