Oil removal agent for oily sewage in oil field as well as preparation method and application of oil removal agent
A degreaser and oily sewage technology, applied in the direction of carboxylate preparation, cyanide reaction preparation, chemical instruments and methods, etc., can solve the problems of poor demulsification performance and sewage can not meet the actual needs, etc., to achieve low cost, clean water Oil effect is good, the effect of a wide range of sources
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[0026] Second aspect, the invention provides the synthetic method of above-mentioned degreasing agent, and concrete steps are as follows:
[0027] (1) Add phenylethyl alcohol, chloroacetic acid, and dicyclohexylcarbodiimide to a four-necked flask equipped with a condensing reflux tube, stir and heat up to 90-100°C, keep the temperature for reaction, and cool to room temperature;
[0028] The cyclohexylcarbodiimide is filtered off, and the unreacted raw materials are washed with distilled water to obtain high-purity phenethyl chloroacetate;
[0029] (2) The above-mentioned phenethyl chloroacetate was placed in the autoclave, the magnesium-aluminum composite catalyst was added, the reactor was purged with nitrogen for 2-3min, and nitrogen was continued to be fed until the pressure of the reactor was 0.05MPa, followed by stirring and warming up to 80 °C. -90°C, feed ethylene oxide, after completion, continue to heat up to 120-130°C, so that the pressure of the reaction kettle rea...
Embodiment 1
[0049] (1) Add 0.5mol phenethyl alcohol, 0.5mol chloroacetic acid, 0.5mol dicyclohexylcarbodiimide to a four-necked flask equipped with a condensing reflux tube, stir and heat up to 90°C, keep the reaction for 2h, and cool to room temperature; filter The cyclohexylcarbodiimide was dropped, washed three times with distilled water, and unreacted raw materials were washed away to obtain high-purity phenylethyl chloroacetate;
[0050] (2) Place the above-mentioned phenethyl chloroacetate in the autoclave, add 6.1g of magnesium-aluminum composite catalyst, purge the reactor with nitrogen for 2min, continue to feed nitrogen until the pressure of the reactor is 0.05MPa, then stir and heat up to 88 MPa. ℃, feed 2mol ethylene oxide, the feeding speed is 2.5g / min, after feeding is completed, continue to heat up to 125-130 ℃, make the pressure of the reaction kettle reach 0.2-0.25MPa, and the pressure gradually decreases as the reaction proceeds , when the pressure no longer drops and is...
Embodiment 2
[0053] (1) Add 0.5mol phenethyl alcohol, 0.65mol chloroacetic acid, 0.65mol dicyclohexylcarbodiimide to a four-necked flask equipped with a condensing reflux tube, stir and heat up to 95°C, keep the reaction for 4h, and cool to room temperature; filter The cyclohexylcarbodiimide was dropped, washed three times with distilled water, and unreacted raw materials were washed away to obtain high-purity phenylethyl chloroacetate;
[0054] (2) Place the above-mentioned phenethyl chloroacetate in the autoclave, add 18.3g magnesium-aluminum composite catalyst, purge the reactor with nitrogen for 2min, continue to feed nitrogen until the reactor pressure is 0.05MPa, then stir and heat up to 87 MPa. ℃, feed 3mol ethylene oxide, the feeding speed is 2.5g / min, after feeding, continue to heat up to 125-130 ℃, make the pressure of the reaction kettle reach 0.25-0.3MPa, and the pressure gradually decreases as the reaction proceeds , when the pressure does not drop any more, after 1h of stabil...
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