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.
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[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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