Compound, composition thereof and method for extracting oil and gas using same
A technology for compounds and compositions, applied in the field of compounds, which can solve problems such as poor solubility interactions
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example 1
[0117] Example 1: Synthesis and characterization of di-cocoethoxylate methyl hydroxypropyl sulfobetaine (expressed as double C 12-14 E n HSB)
[0118] First, the cocoethoxylate (2) ether is converted into cocoethoxylate chloride by using the reaction described above.
[0119] Then add 0.6 moles of coco alcohol polyoxyethylene ether chloride and 5.5 moles of isopropanol to 1000 cm 3 In the high-pressure reactor, 1.5 moles of methylamine (CH 3 NH 2 ). The molar ratio between cocoethoxylate chloride and methylamine in the reaction mixture is maintained between 2.0 and 2.5. The reaction mixture was then stirred and heated to 100-110°C and allowed to react at this temperature for 6 hours to produce cocoeth methyl amine. The product mixture was then distilled under vacuum to remove isopropanol. Transfer the distilled mixture to 1000cm 3 Into the beaker and add 500cm 3 Pure water to dissolve CH as a by-product of the reaction 3 NH 3 Cl solid salt. Then a certain amount of NaOH aqueous ...
example 2
[0125] Example 2: Double C 12-14 E n Surface activity of HSB
[0126] Double C containing a series of concentrations was measured at 25°C 12-14 E n The surface tension of the aqueous solution of HSB is figure 1 The results are shown in. Double C found 12-14 E n HSB can effectively reduce the surface tension of the aqueous solution in a dose-dependent manner, and increase the double C 12-14 E n The concentration of HSB results in a reduced surface tension of the aqueous solution. Other parameters were measured, such as the critical micelle concentration (cmc), the effectiveness of reducing surface tension (γ cmc ), saturated adsorption at the air / water interface (Γ ∞ ), and double C 12-14 E n The molecular cross-sectional area of HSB at the air / water interface (α ∞ ), and the results are listed in Table 1 below.
[0127] Table 1
[0128]
[0129] The results show that double C 12-14 E n HSB is reducing surface tension (γ cmc ) Is highly effective and efficient. Moreover, com...
example 3
[0130] Example 3: Double C 12-14 E n HSB's effect on reducing oil-water IFT
[0131] Prepare the water phase sample as follows:
[0132] An aqueous solution of 1,000 ppm of polyacrylamide (PAM, molecular weight = 25,000,000 g / mol) in Daqing Oilfield connate water was prepared. Then double C 12-14 E n HSB was dissolved in the above solution in different concentrations.
[0133] Subsequently, the dynamic IFT between the above aqueous solution and the crude oil of the Daqing Oilfield was measured by using a rotating droplet tensiometer at 45°C for a period of 120 minutes.
[0134] As in figure 2 As shown in the double C 12-14 E n HSB can reduce the Daqing crude oil / connate water IFT to ultra-low at a concentration of no more than 2.5 mM without adding any alkali or electrolyte.
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