Pour point depressant of high wax content oil and preparation method of pour point depressant
A technology for pour point depressant and crude oil, which is applied in the directions of chemical instruments and methods, mechanical equipment, and drilling compositions, etc., can solve the problems of few reports of crude oil pour point depressants, large investment in heating stations, and crude oil supplementary heat energy, etc. Mass production, good pour point reduction effect, wide range of use
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Embodiment 1
[0023] (1) In a four-necked flask equipped with a condenser and a stirrer, add 1mol of maleic anhydride and 80ml of toluene, pass nitrogen to replace the oxygen in the reactor, and raise the temperature to 60°C, add 1mol of phenylacrylamide and methyl Acrylic acid higher alcohol 2mol, dropwise at the same time 0.05mol of the toluene solution of initiator benzoyl peroxide (BPO), control the flow rate 0.5h to complete the dropwise addition, after constant temperature reaction for 2h, distill the solvent under reduced pressure to obtain solution A;
[0024] (2) Add solution A and 0.5 mol of tetracosyl alcohol into a three-necked flask equipped with toluene and hydroquinone, heat and stir until the reactants are completely dissolved, then add 0.05 mol of catalyst p-toluenesulfonic acid, and react for 1 hour; Pressure distillation removes solvent toluene, obtains product B;
[0025] (3) The product B is first neutralized with 5% sodium carbonate solution to the remaining acid, then...
Embodiment 2
[0027] (1) In a four-necked flask equipped with a condenser and a stirrer, add 1mol of maleic anhydride and 100ml of toluene, pass nitrogen to replace the oxygen in the reactor, and raise the temperature to 80°C, add 1.5mol of phenylacrylamide and formaldehyde dropwise. Base acrylic acid higher alcohol 3mol, drip the toluene solution 0.1mol of initiator benzoyl peroxide (BPO) simultaneously, control flow velocity 1h dropwise, after constant temperature reaction 3h, desolventize under reduced pressure, obtain solution A;
[0028] (2) Add solution A and 1.0 mol of tetracosyl alcohol into a three-necked flask equipped with toluene and hydroquinone, heat and stir until the reactants are completely dissolved, then add 0.08 mol of catalyst p-toluenesulfonic acid, and react for 2 hours; Pressure distillation removes solvent toluene, obtains product B;
[0029] (3) The product B is first neutralized with 5% sodium carbonate solution to the remaining acid, then washed to neutrality, an...
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