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Preparation method of demulsifier

A demulsifier, stirring and mixing technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult dehydration of crude oil, difficulty of demulsifier demulsification, etc., and achieve strong wetting effect

Inactive Publication Date: 2018-10-12
黄智慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a preparation method of a demulsifier in view of the existing chemical oil displacement agent that makes the stability of the crude oil emulsion good, making it difficult for the demulsifier to demulsify and dehydrate the crude oil

Method used

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  • Preparation method of demulsifier

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preparation example Construction

[0018] A preparation method of demulsifier, comprising the steps of:

[0019] (1) Take tert-butylphenol and add tetrapentapentaamine at a mass ratio of 2:5, heat up to 90-100°C and stir and mix for 30-40 minutes to obtain a mixed solution. Take the mixed solution and add formaldehyde at a mass ratio of 100:3. Stir and mix at 35~40°C for 2~3 hours, then add xylene with a mass of 50~60% of the mixed liquid, raise the temperature to 95~100°C, stir and mix for 3~4 hours, and rotate to evaporate to obtain the rotary evaporated product;

[0020] (2) Take the rotary evaporator and add potassium hydroxide at a mass ratio of 10:1, pass through nitrogen protection, vacuumize for 20~30min, then add propylene oxide with 20~30% of the rotary evaporator, heat up to 0.3MPa Stir and mix at 120~130°C for 3~4 hours to obtain a stirred mixture. Take the stirred mixture and add acetic acid solution with a concentration of 0.1mol / L at a mass ratio of 12:1 and stir and mix to obtain a mixture. Take...

Embodiment 1

[0025] A preparation method of demulsifier, comprising the steps of:

[0026] (1) Take tert-butylphenol and add tetrapentapentaamine at a mass ratio of 2:5, heat up to 90°C and stir and mix for 30 minutes to obtain a mixed solution, take the mixed solution and add formaldehyde at a mass ratio of 100:3, stir and mix at 35°C 2h, then add xylene with 50% mass of the mixed solution, raise the temperature to 95°C, stir and mix for 3h, and rotovap to obtain the rotoevaporator;

[0027] (2) Take the rotary evaporator and add potassium hydroxide at a mass ratio of 10:1, pass through nitrogen protection, vacuumize for 20 minutes, then add propylene oxide with 20% mass of the rotary evaporator, heat up to 120°C at 0.3MPa, stir and mix 3h, to obtain a stirred mixture, take the stirred mixture and add acetic acid solution with a concentration of 0.1mol / L at a mass ratio of 12:1 and stir and mix to obtain a mixture, take the mixture and extract it with dichloromethane, take the extract and...

Embodiment 2

[0032] A preparation method of demulsifier, comprising the steps of:

[0033] (1) Take tert-butylphenol and add tetrapentapentaamine at a mass ratio of 2:5, heat up to 100°C and stir and mix for 40 minutes to obtain a mixed solution, take the mixed solution and add formaldehyde at a mass ratio of 100:3, stir and mix at 40°C 3h, then add xylene with 60% mass of the mixed solution, raise the temperature to 100°C, stir and mix for 4h, and then rotovap to obtain a rotoevaporator;

[0034] (2) Take the rotary evaporator and add potassium hydroxide at a mass ratio of 10:1, pass through nitrogen protection, vacuumize for 30 minutes, then add propylene oxide with a mass of 30% of the rotary evaporator, heat up to 130°C at 0.3MPa, stir and mix 4h, to obtain a stirred mixture, take the stirred mixture and add acetic acid solution with a concentration of 0.1mol / L at a mass ratio of 12:1 and stir and mix to obtain a mixture, take the mixture and extract it with dichloromethane, take the e...

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Abstract

The invention discloses a preparation method of a demulsifier, and belongs to the technical field of chemical industry. According to the method disclosed by the invention, tert-butylphenol, formaldehyde and tetraethylenepentamine are used to prepare tert-butylphenol phenol amine resin; the tert-butylphenol phenol amine resin is used as an initiator; the tert-butylphenol phenol amine resin and propylene oxide are subjected to an anion ring-opening polymerization reaction to form a block polyether; and the block polyether has stronger wetting and replacing effects. When the block polyether withstronger surface activity replaces other emulsifiers, an interface film becomes loose, adsorption of block polyether molecules at a gas-liquid interface can be promoted, ability of the polyether to reduce surface tension of water can be improved, and micelles are easier to form in a bulk phase for the block polyether, so that more emulsifier molecules are replaced, better dehydration effects are achieved, and demulsification in the late stage is prepared. The method disclosed by the invention solves the problem that the crude oil is difficult to dehydrate because that a current chemical oil displacing agent makes a crude oil emulsion have good stability and makes a demulsifier have difficult demulsification.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of a demulsifier. Background technique [0002] Demulsifier, one of the chemical products. Because some solids are difficult to dissolve in water, when one or more of these solids exist in an aqueous solution in large quantities, under the agitation of hydraulic or external power, these solids can exist in water in an emulsified state to form an emulsion. Theoretically speaking, this system is unstable, but if there are some surfactants (soil particles, etc.), the emulsification state is very serious, and even the two phases are difficult to separate, the most typical is the oil-water mixture in oil-water separation As well as the water-oil mixture in sewage treatment, a relatively stable water-in-oil or oil-in-water structure is formed in this two-phase, and its theoretical basis is "electric double layer structure". In this case, som...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C08F222/02C08F220/20C08F228/02C08G65/28C08G14/073
CPCC08F222/02C08G14/06C08G65/2627C09K8/584C09K2208/26C08F220/20C08F228/02
Inventor 黄智慧庄文琴丁正颖
Owner 黄智慧
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