A kind of preparation method of demulsifier 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 problems such as not being able to meet oil field production well, and achieve the effects of promoting demulsification effect, strong hydrophilic performance and fast demulsification speed.

Active Publication Date: 2022-07-08
大庆宇彦科技有限公司
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  • 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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  • A kind of preparation method of demulsifier inhibiting oil-water intermediate transition layer
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  • A kind of preparation method of demulsifier 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 inhibiting an oil-water intermediate transition layer. The general formula of the demulsifier is as follows:

[0022]

[0023] in:

[0024]

[0025] The preparation method comprises the following steps:

[0026] In the first step, the quantitative prenyl alcohol and the catalyst potassium hydroxide are put into the high temperature and high pressure reaction kettle and sealed, and the consumption of the catalyst potassium hydroxide is 0.2% to 0.25% of the total material quality in the high temperature and high pressure reaction kettle; the method of nitrogen purging is used. 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, slowly introduce propylene oxide, the introduced propylene oxide and isoprenol in the kettle The mass ratio of propylene oxide is 30:1; the tem...

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 reading of the pressure gauge of the reaction kettle is between 0.2 ± 0.01Mpa during the reaction;

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

[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 dosage of the catalyst is 1.2% of the mass of the self-polymerization product B of the quantitative N.

[0036] In addition, in the fourth step, after the first water bath heating to 50-60 °C, potassium hydroxide is added, followed by stirring for 15-25 minutes, and then the first water-bath heating is performed, and the effect is better.

[0...

Embodiment 1

[0045] 10g of prenyl alcohol and 9.3g of potassium hydroxide were added to the high temperature and high pressure reaction kettle, and the reaction kettle was sealed. Before heating, use nitrogen to purge and replace the air, then use a vacuum pump to evacuate until the gauge pressure in the reactor reaches -0.09MPa, and then start heating. When the temperature rises to 140 °C, stop heating, open the feed valve, and feed 300 g of propylene oxide. , control the gauge pressure in the kettle within 0.2 ± 0.01MPa, the temperature remains unchanged, after the reaction of the materials in the kettle is completed, after the pressure falls, continue the reaction for 25min to reduce the pressure to -0.09Mpa; finally, the temperature is lowered to open the kettle, and the material is discharged to obtain an intermediate product 1.

[0046] After the reaction, the intermediate product 1 and 6.98 g of potassium hydroxide were added to the high temperature and high pressure reaction kettle...

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Abstract

A preparation method of a demulsifier for inhibiting an oil-water intermediate transition layer. The method includes the following steps: putting quantitative prenyl alcohol and catalyst potassium hydroxide into a high-temperature and high-pressure reaction kettle for sealing, feeding propylene oxide for heating and reaction, and obtaining intermediate product 1; adding potassium hydroxide to intermediate product 1, and then feeding epoxy Ethane is heated up and reacted to obtain polyether A; the polyether A and xylene are poured into the first there-necked flask and placed in an oil bath to heat up; benzoyl oxide is used as an initiator to add the first three-necked flask that is heating up. In the bottle, the self-polymerization product B was obtained after the reaction; the amount of N was taken from the self-polymerization product B, put into the second three-necked flask, heated in a water bath, and used potassium hydroxide as a catalyst to 60 ° C ~ 80 ° C, and then slowly dripped. Add epichlorohydrin, the mass ratio of the epichlorohydrin to the self-polymerization product B of quantitative N ranges from 0.02:1 to 0.024:1, and the water bath is heated to 80°C to 90°C for insulation, and the inhibitor is obtained after 8 hours. Demulsifier for oil-water intermediate transition layer.

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 generation 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 is widely used, and a large amount of surfactants and oil displacement agents are invested in the production, so that the crude oil produced fluid is an emulsion, accompanied by a high comprehensive water content and stable It has the characteristics of strong stability and other characteristics, which has a serious impact on the transportation, application and processing of crude oil. Therefore, demulsification and dehydration of crude oil is extremely important in production and operation. [0003] The composition of the oil-water intermediate transition layer is complex, and the composition of crude oil produce...

Claims

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Application Information

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Patent Type & Authority Patents(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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