Preparation method of demulsifying agent

A technology of demulsifier and solvent, applied in the field of preparation of demulsifier, can solve the problem of high demulsification temperature, and achieve the effects of low demulsification temperature, good demulsification effect and reduction of processing cost

Inactive Publication Date: 2014-07-30
山东华强环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the demulsification temperature of the crude oil demulsifier is 40-80°C, which is relatively high

Method used

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  • Preparation method of demulsifying agent
  • Preparation method of demulsifying agent
  • Preparation method of demulsifying agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of demulsifier, the steps are as follows:

[0034] (1) Add formaldehyde to the reactor and start stirring, add urea and o-cresol at room temperature, adjust the pH to 1-2 with sulfuric acid; the molar ratio of urea, formaldehyde and o-cresol is 1:4: 2;

[0035] (2) Raise the temperature to 90°C, hold the reaction for 4 hours, then raise the temperature to 100°C, and hold the reaction for 2 hours;

[0036] (3) Add APE in an equimolar amount to formaldehyde at 100°C, and carry out alkylation reaction at 100°C for 2 hours to obtain the product;

[0037] After the reaction is completed, the temperature is lowered to below 40°C and the material is discharged.

[0038] In the APE described in step (3) of this embodiment: m is 20, n is 10, R 2 For methyl.

Embodiment 2

[0040] A preparation method of demulsifier, the steps are as follows:

[0041] (1) Add formaldehyde to the reactor and start stirring, add urea and o-ethylphenol at room temperature, adjust the pH to 2-3 with sulfuric acid; the molar ratio of urea, formaldehyde and o-ethylphenol is 1:4: 3;

[0042] (2) Raise the temperature to 95°C, hold the reaction for 2 hours, then raise the temperature to 105°C, and hold the reaction for 1 hour;

[0043] (3) Add APE in an equimolar amount to formaldehyde at 105°C, and carry out alkylation reaction at 105°C for 1 hour to obtain the product;

[0044] After the reaction is completed, the temperature is lowered to below 40°C and the material is discharged.

[0045] In the APE described in step (3) of this embodiment: m is 80, n is 40, R 2 For ethyl.

Embodiment 3

[0047] A preparation method of demulsifier, the steps are as follows:

[0048] (1) Add formaldehyde to the reactor and start stirring, add urea and o-isopropylphenol at room temperature, and adjust the pH to 3-4 with sulfuric acid; the molar ratio of urea, formaldehyde and o-isopropylphenol is 1: 4:2.5;

[0049] (2) Raise the temperature to 95°C, hold the reaction for 2 hours, then raise the temperature to 105°C, and hold the reaction for 1 hour;

[0050] (3) Add APE in an equimolar amount to formaldehyde at 105°C, and carry out alkylation reaction at 105°C for 1 hour to obtain the product;

[0051] After the reaction is completed, the temperature is lowered to below 40°C and the material is discharged.

[0052] In the APE described in step (3) of this embodiment: m is 25, n is 15, R 2 For isopropyl.

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Abstract

The invention relates to a preparation method of a demulsifying agent, which comprises the steps as follows: (1) adding methanal into a reactor, turning on for stirring, adding urea and alkylphenol at the room temperature, regulating pH (potential of hydrogen) to be 1-4 with sulfuric acid, (2) heating up to 90-95 DEG C, keeping warm for reaction for 2-4h, heating up to 100-105 DEG C, keeping warm for reaction for 1-2h, and (3) adding APE (tri-isopropanlamiue polyoxypropyleal polyoxy-ethylene ether) at 100-105 DEG C, controlling the temperature to be 100-150 DEG C for alkylation reaction for 1-2h, and obtaining the demulsifying agent, wherein a mole ratio of the urea to methanal to alkylphenol is 1:4:(2-3). The demulsifying agent is low in demulsifying temperature, can achieve a better demulsifying effect at the room temperature, even has the better demulsifying effect at 0-5 DEG C, and is short in demulsifying time and high in demulsifying efficiency.

Description

technical field [0001] The invention relates to a preparation method of a demulsifier, belonging to the technical field of chemical reagents. Background technique [0002] Demulsifier is a kind of surface active substance, which can destroy the structure of emulsified liquid, so as to achieve the purpose of separating the phases in the emulsion. Crude oil demulsification refers to the use of chemical action of demulsifier to separate the oil and water in the emulsified oil-water mixture, so as to achieve the purpose of dehydration of crude oil, so as to ensure the water content standard of crude oil export. At present, most of the demulsifiers commonly used in oil fields are non-ionic demulsifiers, mainly including SP demulsifiers, AE demulsifiers, AP demulsifiers, AR demulsifiers, etc. However, the existing demulsifiers have disadvantages such as high demulsification temperature and slow demulsification speed, and are difficult to meet the development needs of the crude oi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04C08G81/00C08G14/08
Inventor 郭树杰卢国明
Owner 山东华强环保科技有限公司
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