Demulsifier and its preparation method and application in demulsification of heavy oil containing asphaltene
A demulsifier and reaction technology, which is applied in the demulsifier and its preparation, and the application field of asphaltene-containing heavy oil demulsification. It can solve the problems of high dehydration cost, low equipment processing efficiency, and few varieties of heavy oil, and achieve excellent demulsification. The effect of the milk effect
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[0019] The present invention provides a kind of preparation method of demulsifier on the one hand, this method comprises:
[0020] (1) In the first alcoholic solvent, the compound shown in formula (1) is subjected to the first Michael addition reaction with the unsaturated carboxylic acid ester;
[0021] Formula 1) R 1 Alkylene group selected from C1-C4, L 1 Alkylene group selected from C1-C4 or -(L 2 -NH) n -L 3 -, L 2 and L 3 Each independently selected from C1-C4 alkylene, n is an integer of 1-4;
[0022] (2) carrying out dehydration condensation reaction with the product of the compound shown in formula (2) and the first Michael addition reaction;
[0023] Formula (2) R 2 An alkyl group selected from C1-C4, m is an integer of 1-4;
[0024] (3) The product of the dehydration condensation reaction is desolvated to obtain product I and carry out the second Michael addition reaction with maleic acid monoester in an organic solvent;
[0025] (4) In the presence of...
Embodiment 1
[0069] This example is used to illustrate the demulsifier of the present invention and its preparation method.
[0070](1) 50g of 4-((2-aminoethyl)aminomethyl)-phenol was dissolved in 100g of methanol, and the resulting mixture was added dropwise to 26g of methyl acrylate (completed within about 6min), at 25°C Under stirring reaction 10h;
[0071] (2) Add 51g of 4-[2-(2-methoxyethoxy)ethoxy]phenol to the above reaction product, and continue to react for 5h at 25°C; Rotary distillation under reduced pressure under 130Pa condition, obtains product I;
[0072] (3) the product I of 100g, 43g monobutyl maleate and 240g acetonitrile join in the reactor and mix, and pass into N 2 Finally, the reactor was sealed, and the reaction was stirred at 90° C. for 3 h; the reaction product was cooled to room temperature and filtered, the filtrate was concentrated, and the solvent was removed by rotary evaporation to obtain product II;
[0073] (4) Add 120g of product II and 3.1g of catalyst...
Embodiment 2
[0076] This example is used to illustrate the demulsifier of the present invention and its preparation method.
[0077] (1) Dissolve 50g of 4-[1-(2-aminoethyl)aminoethyl]phenol in 100g of ethanol, and add the resulting mixture dropwise to 45g of isopropyl crotonate (complete addition within about 6 minutes) , stirred and reacted at 30°C for 12h;
[0078] (2) Add 4-[2-(2-methoxyethoxy)ethoxy]phenol to the above reaction product, and continue to react for 4.5h at 30°C; , Rotary distillation under reduced pressure under 130Pa condition, obtain product I;
[0079] (3) the product I of 100g, 38g monopropyl maleate and 220g acetonitrile join in the reactor and mix, and pass into N 2 Finally, the reactor was sealed, and the reaction was stirred at 85° C. for 2.5 h; the reaction product was cooled to room temperature and filtered, the filtrate was concentrated, and the solvent was removed by rotary evaporation to obtain product II;
[0080] (4) Add 120g of product II and 4g of cata...
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