A kind of efficient asphalt aggregation inhibitor and preparation method thereof
A technology of inhibitors and asphalt, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as increased production costs, poor fluidity, and difficulties in heavy oil production and transportation
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Embodiment 1
[0007] (1) Add 0.05mol2,2-bis(4-hydroxyphenyl)propane into the three-necked reaction flask, pass N 2 , drive out the air, heat up to 160°C and melt, slowly add 1 g of 98% concentrated sulfuric acid, stir evenly, slowly add 0.3mol styrene dropwise under stirring, control the rate of addition, keep the reaction temperature at 170-175°C, and drop it Continue to keep warm for 2 hours, cool down to 25°C to obtain a colorless transparent viscous liquid, add 100ml of absolute ethanol to dilute and dissolve the above product, then add 2g of potassium hydroxide and 0.05mol of epichlorohydrin, heat up to 35-40°C, Stir vigorously for 3 hours, cool, and set aside;
[0008] (2) 0.05mol4-vinylpyridine and 0.01mol vinylpyrrolidone are put into the reaction flask, add in the mixed solution of 50g ethanol and water, wherein ethanol: water=1:3, then add 0.05g benzoic acid peroxide, Stir to dissolve evenly, pass N 2 , drive out the air, heat up to 70°C, react at 70-75°C for 5 hours, and produc...
Embodiment 2
[0011] (1) Different amounts of asphalt are dissolved in toluene to prepare toluene solutions with different concentrations of asphaltenes. At 25°C, the absorbance of toluene solutions with different concentrations of asphaltene was measured with a UV7501 ultraviolet spectrophotometer at a wavelength of 350 nm, see Table 1. Draw the absorbance-asphaltene concentration standard curve. The curve is a straight line passing through the coordinate origin with a slope of 0.405. The equation is: Y=0.405X, where X is the asphaltene concentration (mg / L) in the toluene solution, and Y is the absorbance (%) of the asphaltene toluene solution.
[0012] Table 1 Absorbance of toluene solutions with different concentrations of asphaltenes (25°C)
[0013] Asphaltene concentration, mg / L 0 30 50 70 100 120 150 200 Solution absorbance, % 0 12.14 20.26 28.36 40.48 48.58 60.77 80.98
[0014] (2) According to the same method in (1), at 25°C, three kinds of asphal...
Embodiment 3
[0018] At 25°C, dissolve different amounts of asphalt in toluene to prepare an asphaltene toluene solution with a concentration of 150 mg / L; add the products in Example 1 at the following concentrations: 0, 1, 3, 5, 7, 10 mg / L L, fully shake to make the solution uniform. Then add 10 grams of natural rock core particles with a particle size of 0.1 to 0.3 mm in every 25 ml of the above solution, seal and soak for 7 days. Take the supernatant and filter it with a 0.45um microporous membrane, and measure the absorbance of the filtrate at a wavelength of 350nm. The asphaltene concentration of the toluene solution was calculated using the equation Y=0.405X. Calculate the adsorption amount and adsorption rate of natural rock cores to asphaltene under the action of different doses of chemicals according to the following formula: adsorption amount = (150-X) × 0.025, where X is the asphaltene concentration of the toluene solution after treatment, adsorption rate = adsorption amount / (1...
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