Crude oil demulsifying agent and preparation method thereof

A crude oil demulsifier and demulsifier technology, applied in chemical dehydration/demulsification, hydrocarbon oil treatment, petroleum industry, etc., can solve problems such as difficult separation, unsatisfactory dehydration effect, cumbersome synthesis method, etc., and achieve clear water quality , crude oil has a wide range of adaptability, and the synthesis method is simple

Active Publication Date: 2017-05-17
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above synthesis method is cumbersome, and the product contains excess acrylic acid monomer which is not conducive to the demulsification of crude oil, which is difficult to separate from the product, resulting in problems such as unsatisfactory dehydration effect

Method used

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  • Crude oil demulsifying agent and preparation method thereof
  • Crude oil demulsifying agent and preparation method thereof
  • Crude oil demulsifying agent and preparation method thereof

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preparation example Construction

[0030] The embodiment of the present invention also provides a preparation method of the crude oil demulsifier as described in the above embodiment, comprising the following steps: adding polyoxyethylene polyoxypropylene ether of unsaturated alcohol, initiator and solvent into the reaction vessel, Under the protection of nitrogen, the crude oil demulsifier is obtained by initiating polymerization under the condition that the reaction temperature is 80°C-110°C and the reaction time is 3-8h.

[0031] The above-mentioned embodiment provides a kind of preparation method of crude oil demulsifier, wherein, polyoxyethylene polyoxypropylene ether macromonomer of unsaturated alcohol is obtained by initiating polymerization under the action of solvent and initiator, in the above-mentioned preparation method , in order to avoid the impact of the ambient atmosphere on the reactants, the whole reaction is operated under the protection of an inert gas, preferably nitrogen, and the reaction t...

Embodiment 1

[0038] Put 1 mol of hexenol into the autoclave, add AlCl 3 As a catalyst, vacuumize, N 2 Purge three times, gradually raise the temperature to 110°C, continuously feed propylene oxide and ethylene oxide, and keep the reaction pressure at 0.25MPa. After the feed reaction is completed, vacuumize to remove the reaction residue, and add acetic acid to neutralize, that is Hexenol polyoxypropylene polyoxyethylene ether can be obtained.

[0039] Add hexenol polyoxypropylene polyoxyethylene ether into the reaction container, and then add 80% butyl acetate solvent into it, fill it with nitrogen for protection, raise the temperature to 80°C, and slowly add 3% peroxide The initiator of benzoyl, the temperature is lowered after the polymerization reaction for 8 hours, and the demulsifier A is obtained.

Embodiment 2

[0041] Put 1mol of butenol into the autoclave, add Ca(OH) 2 As a catalyst, vacuumize, N 2 Purge three times, gradually raise the temperature to 140°C, continuously feed propylene oxide, and keep the reaction pressure at 0.3MPa. After the feed reaction is completed, vacuumize to remove the reaction residue, add acetic acid to neutralize, and you can get butenol polyoxyethylene polyoxypropylene ether.

[0042] Add butenyl alcohol polyoxyethylene polyoxypropylene ether into the reaction container, then add xylene solvent with a weight ratio of 50%, fill it with nitrogen for protection, raise the temperature to 90°C, and slowly add 1% azobis The initiator of isobutyronitrile, the temperature is lowered after the polymerization reaction for 4 hours, and the demulsifier B is obtained.

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Abstract

The invention provides a crude oil demulsifying agent and a preparation method thereof, belonging to the field of crude oil demulsification and dewatering. The crude oil demulsifying agent has the advantages of rapid dewatering, clear water after dewatering, wide adaptive range of crude oil, and the like. The crude oil demulsifying agent uses double bond-contained unsaturated alcohol as an initiator, initiates anionic ring-opening polymerization of propylene oxide and ethylene oxide under the action of a catalyst to obtain poly-oxypropylene-poly-oxyethylene ether of unsaturated alcohol, and initiates polymerization under the action of the initiator. The crude oil demulsifying agent provided by the invention can be used in crude oil demulsification and dewatering process.

Description

technical field [0001] The invention belongs to the field of demulsification and dehydration of crude oil, in particular to a crude oil demulsifier and a preparation method thereof. Background technique [0002] In the process of oil gathering and refining, impurities such as water and inorganic salts dissolved in water exist in crude oil, forming a stable crude oil emulsion, which will not only increase the load on pumps, pipelines and storage tanks, but also cause pipeline Corrosion and fouling of systems, pumps and production equipment, etc. Therefore, crude oil must be dehydrated and desalted before refining, otherwise it cannot be refined and processed. [0003] Chemical demulsification is one of the most convenient, economical and effective methods to remove water from crude oil emulsion. FeSO was reported from 1914 4 It has a history of more than one hundred years since the solution demulsified the emulsified crude oil. With the development of oil recovery technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F299/02C08G65/26C10G33/04
CPCC10G33/04C08F299/022C08G65/2609C10G2300/1033
Inventor 张志庆王芳杨春天周亭王秀凤张国栋
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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