Preparation method of demulsifier for inhibiting oil-water intermediate transition layer

A technology of demulsifier and transition layer, which is applied in the field of preparation of demulsifier, can solve the problem that oil field production cannot be well satisfied, and achieve the effect of promoting demulsification effect, high surface activity and strong hydrophilic performance.

Active Publication Date: 2020-05-19
大庆宇彦科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many types of demulsifiers in my country at this stage, most of them are specific and cannot meet the needs of oilfield production well.

Method used

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  • Preparation method of demulsifier for inhibiting oil-water intermediate transition layer
  • Preparation method of demulsifier for inhibiting oil-water intermediate transition layer
  • Preparation method of demulsifier for inhibiting oil-water intermediate transition layer

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preparation example Construction

[0021] The invention relates to a preparation method of a demulsifier for suppressing an intermediate transition layer between oil and water. The general structural formula of the demulsifier is as follows:

[0022]

[0023] in:

[0024]

[0025] Described preparation method comprises the steps:

[0026] In the first step, put quantitative isopentenol and catalyst potassium hydroxide into a high-temperature and high-pressure reactor to seal, and the amount of catalyst potassium hydroxide is 0.2% to 0.25% of the total material mass in the high-temperature and high-pressure reactor; the method of purging with nitrogen Replace the air in the kettle, use a vacuum pump to evacuate until the pressure indication is -0.09MPa, open the feed valve of the high-temperature and high-pressure reaction kettle, and slowly feed propylene oxide, and the propylene oxide and isopentenol in the kettle The mass ratio of the propylene oxide is 30:1; the temperature is raised to 135 ° C ~ 14...

Embodiment approach

[0031] In the second step, the mass ratio of the intermediate product 1 to ethylene oxide is 1:2;

[0032] In the first step and the second step, the reaction temperature in the kettle is 140°C, and the pressure gauge reading of the reactor is between 0.2±0.01Mpa during the reaction;

[0033] In the first step, the catalyst consumption used is 0.2% of the total material mass; in the second step, the catalyst consumption used is 0.15% of the total material quality;

[0034] In the third step, the temperature of the oil bath is 70°C; the mass ratio of benzoyl peroxide to polyether A is 0.01:1;

[0035] In the fourth step, the amount of catalyst used is 1.2% of the mass of the self-polymerized product B of quantitative N.

[0036] In addition, in the fourth step, after the first water bath is heated to 50-60°C, potassium hydroxide is added, and then it needs to be stirred for 15-25 minutes before the first water-bath heating, the effect is better.

[0037] The chemical reaction...

Embodiment 1

[0045] Get 10g prenyl alcohol and 9.3g potassium hydroxide and join into the high temperature and high pressure reactor, and the reactor is sealed. Use nitrogen to purge and replace the air before heating, then use a vacuum pump to evacuate the reactor until the gauge pressure reaches -0.09MPa, then start heating, stop heating when the temperature rises to 140°C, open the feed valve, and feed 300g of propylene oxide , control the internal surface pressure of the kettle within 0.2±0.01MPa, and keep the temperature constant. After the reaction of the materials in the kettle is completed and the pressure drops, continue the reaction for 25 minutes to reduce the pressure to -0.09Mpa; finally cool down and open the kettle, and discharge the material to obtain the intermediate product 1.

[0046] After the reaction, the intermediate product 1 and 6.98 g of potassium hydroxide were added to a high-temperature and high-pressure reactor, and the reactor was sealed. Use nitrogen to pur...

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Abstract

The invention discloses a preparation method of a demulsifier for inhibiting an oil-water intermediate transition layer. The preparation method comprises the following steps: putting quantitative isopentenol and a catalyst potassium hydroxide into a high-temperature and high-pressure reaction kettle, sealing, introducing propylene oxide, and carrying out a heating reaction to obtain an intermediate product 1; adding potassium hydroxide into the intermediate product 1, and introducing ethylene oxide for heating reaction to obtain polyether A; pouring polyether A and xylene into a first three-necked bottle, and putting the first three-necked bottle into an oil bath for heating; adding benzoyl oxide as an initiator into a first three-neck flask which is being heated, and carrying out a reaction to obtain a self-polymerization product B; taking a certain amount of N,N-dimethyl formamide from the polymerization product B, putting into a second three-neck bottle, heating the three-neck bottle in a water bath to 60-80 DEG C with potassium hydroxide as a catalyst, then slowly dropwise adding epoxy chloropropane, heating the mixture in the water bath to 80-90 DEG C, and maintaining the temperature for 8 hours to prepare the demulsifier for inhibiting the oil-water intermediate transition layer, wherein the mass ratio of epoxy chloropropane to the quantitative N self-polymerization product B is 0.02:1-0.024:1.

Description

Technical field: [0001] The invention relates to a preparation method of oilfield chemicals, in particular to a preparation method of a demulsifier capable of inhibiting the formation of an oil-water intermediate transition layer. Background technique: [0002] As most oilfields in my country have entered a period of high water cut, tertiary oil recovery technology has been widely used, and a large amount of surfactant and oil displacement agent have been invested in the production, making the crude oil production fluid an emulsion, accompanied by high comprehensive water content, stable Strong oil resistance and other characteristics have a serious impact on the transportation, application and processing of crude oil. Therefore, demulsification and dehydration of crude oil are extremely important in production and operation. [0003] The composition of the oil-water intermediate transition layer is complex, and the composition of crude oil produced from different oilfields i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F299/02C08F8/00C10G33/04
CPCC08F8/00C10G33/04C08F299/024Y02P20/584
Inventor 魏立新卢梦媚刘扬代轩瑞叶霖李哲宋洋张成玥耿孝恒贾新磊
Owner 大庆宇彦科技有限公司
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