Crude oil demulsifier and preparation method thereof

A crude oil demulsifier and demulsifier technology, applied in chemical dehydration/demulsification, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of poor adaptability, poor effect, separation, etc., and achieve easy industrial application and simple process Effect

Active Publication Date: 2017-01-18
广东粤首新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These small water droplets are surrounded by a stable interfacial film formed by natural emulsifiers. This interfacial film has a relatively high viscosity and high mechanical strength, thereby hindering the contact, coagulation, and sedimentation of water droplets, and cannot be separated from crude oil.
[0005] In the 1920s, crude oil demulsifiers were ordinary soap products of caustic soda, and the demulsification efficiency was low
Since the 1840s, the introduction of ionic surfactants has gradually brought the research and development of crude oil demulsifiers into a new stage: the first generation of low-molecular anionic surfactants is cheap, but the disadvantages are large dosage and poor effect ; The second generation of low molecular weight non-ionic demulsifier, the product is resistant to acid, alkali and salt, but it is used in a large amount; the third generation of high molecular weight non-ionic demulsifier has the advantages of less dosage and good effect, and the disadvantages are Strong specificity and poor adaptability

Method used

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  • Crude oil demulsifier and preparation method thereof
  • Crude oil demulsifier and preparation method thereof
  • Crude oil demulsifier and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] In this embodiment, a crude oil demulsifier comprises polymer resin, diepoxide, sulfonic acid and solvent oil with a weight ratio of 100:20:3:40. The preparation method comprises the following steps:

[0026] (1) Preparation of polymer resin:

[0027] Phenol and formaldehyde are mixed into a mixture according to a weight ratio of 1:1.6, and then water is added to the mixture to prepare an aqueous solution of the mixture. The mass concentration of the mixture in the aqueous solution of the mixture is 40%; then benzenesulfonic acid is added to adjust the pH to about 2.5, React at a temperature of 70°C until the reaction liquid is clear to obtain an alkylphenol-formaldehyde resin;

[0028] After the alkylphenol-formaldehyde resin is cooled to 50°C, propylene oxide and ethylene oxide are sequentially added to react for 1 hour to obtain a polymer resin, wherein the alkylphenol-formaldehyde resin, propylene oxide (PO) and ring The weight ratio of oxyethane (EO) is 100:30:30;...

Embodiment 2

[0031] A kind of crude oil demulsifier in this embodiment comprises polymer resin, diepoxide, sulfonic acid and solvent oil with a weight ratio of 100:15:5:30, and the preparation method comprises the following steps:

[0032] (1) Preparation of polymer resin:

[0033] Mix phenol and furfural in a weight ratio of 1:1 to form a mixture, then add water to the mixture to prepare an aqueous solution of the mixture, the mass concentration of the mixture in the aqueous solution of the mixture is 30%; then add benzenesulfonic acid to adjust the pH to about 2.5, React at a temperature of 60°C until the reaction solution is clear to obtain an alkylphenol-formaldehyde resin;

[0034] After the alkylphenol-formaldehyde resin is cooled to 55°C, propylene oxide and ethylene oxide are sequentially added to react for 2 hours to obtain a polymer resin, wherein the alkylphenol-formaldehyde resin, propylene oxide (PO) and ring The weight ratio of oxyethane (EO) is 100:20:40;

[0035] (2) Afte...

Embodiment 3

[0037] In this embodiment, a crude oil demulsifier comprises a polymer resin, a diepoxide, sulfonic acid and solvent oil in a weight ratio of 100:30:2:50, and the preparation method comprises the following steps:

[0038] (1) Preparation of polymer resin:

[0039] Mix phenol and formaldehyde into a mixture at a weight ratio of 1:2, then add water to the mixture to prepare an aqueous solution of the mixture, the mass concentration of the mixture in the aqueous solution of the mixture is 50%; then add petroleum sulfonic acid to adjust the pH to about 2.5, React at a temperature of 80°C until the reaction solution is clear to obtain an alkylphenol-formaldehyde resin;

[0040] After the alkylphenol-formaldehyde resin is cooled to 45°C, propylene oxide and ethylene oxide are sequentially added to react for 1.5 hours to obtain a polymer resin, wherein the alkylphenol-formaldehyde resin, propylene oxide (PO) and ring The weight ratio of oxyethane (EO) is 100:40:20;

[0041] (2) Aft...

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Abstract

The invention relates to a crude oil demulsifier and a preparation method thereof. The crude oil demulsifier comprises macromolecular resin, bicyclo-oxide, sulfonic acids and solvent oil at a weight ratio of 100:(15-30):(2-5):(30-50), wherein the macromolecular resin is formed by polymerization of alkyl phenolic resin, ethylene oxide and propylene epoxide. The crude oil demulsifier is good in demulsification effect, wide in application range and good in adaptability and can be suitable for dewatering and desalting of a vast majority of crude oils.

Description

technical field [0001] The invention relates to the technical field of crude oil processing, in particular to a crude oil demulsifier and a preparation method thereof. Background technique [0002] Desalination and dehydration are necessary in the process of petroleum refining, otherwise there will be endless troubles. For example, the water in crude oil, as the crude oil vaporizes during the heating process, increases the gas phase load of the tower, causing fluctuations in the operation of atmospheric and vacuum devices, and in severe cases, it will cause "tower flushing" accidents; MgCl in crude oil 2 and CaC1 2 It can be hydrolyzed to produce corrosive HCl. HCl dissolves in water to form hydrochloric acid, which has a strong corrosive effect and causes corrosion of the initial distillation tower, atmospheric tower and vacuum tower top system of the atmospheric and vacuum device; when processing sulfur-containing crude oil , the sulfur-containing compound decomposes to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C08G8/28C08G8/10
CPCC08G8/10C08G8/28C10G33/04C10G2300/1033
Inventor 付海明
Owner 广东粤首新科技有限公司
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