Composition for reducing minimum miscible pressure of carbon dioxide and crude oil and preparation method thereof
A carbon dioxide, miscible pressure technology, applied in drilling compositions, chemical instruments and methods, bulk chemical production, etc. Crude oil fluidity and other problems, to achieve the effect of not easy to decompose, increase thermal stability and decomposition resistance, simple and efficient preparation method
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Embodiment 1
[0038] The preparation of embodiment 1 composition 1#
[0039] The preparation method of composition 1# comprises the following steps:
[0040] (1) Polyoxyethylene alkyl alcohol amide (R is C 12 Alkyl group, n is 30), sodium cocoyl isethionate, azobisisobutyronitrile, N-methylpyrrolidone and boron trifluoride ether were added to the reaction kettle, stirred at 80°C for 2h, Obtain an anionic-nonionic surfactant;
[0041] (2) Continue to add supercritical carbon dioxide into the reaction kettle under the conditions of pressure 10Mpa and temperature 60°C, and stir for 3 hours;
[0042] (3) Keep the pressure at 10Mpa, slowly raise the temperature to 100°C, add fluorine-containing cymene to the reactor (the molar ratio of p-cymene-1-fluorine to o-cymene-5-fluorine is 1:2) , and stirred for 2h to obtain composition 1#.
[0043] Among them, in terms of parts by weight, 20 parts of supercritical carbon dioxide, 20 parts of polyoxyethylene alkanolamide, 20 parts of sodium cocoyl is...
Embodiment 2
[0044] The preparation of embodiment 2 composition 2#
[0045] The preparation method of composition 2# comprises the following steps:
[0046] (1) Polyoxyethylene alkyl alcohol amide (R is C10 Alkyl group, n is 22), sodium cocoyl isethionate, azobisisoheptanonitrile, N-methylpyrrolidone and boron trifluoride ether were added to the reaction kettle, stirred at 60°C for 1h, Obtain an anionic-nonionic surfactant;
[0047] (2) Continue to add supercritical carbon dioxide into the reaction kettle under the conditions of pressure 7Mpa and temperature 50°C, and stir for 2 hours;
[0048] (3) Keep the pressure at 7Mpa, slowly raise the temperature to 80°C, add fluorine-containing cymene to the reaction kettle (the molar ratio of p-cymene-1-fluorine to o-cymene-5-fluorine is 1:2) , and stirred for 1 h to obtain composition 2#.
[0049] Among them, in terms of parts by weight, 10 parts of supercritical carbon dioxide, 10 parts of polyoxyethylene alkanolamide, 10 parts of sodium coco...
Embodiment 3
[0050] The preparation of embodiment 3 composition 3#
[0051] The preparation method of composition 3# comprises the following steps:
[0052] (1) Polyoxyethylene alkyl alcohol amide (R is C 16 Alkyl group, n is 35), sodium cocoyl isethionate, dimethyl azobisisobutyrate, tetraethylene glycol dimethyl ether and heteropoly acid are added to the reaction kettle, at 100 ° C Stir for 3h to obtain anion-nonionic surfactant;
[0053] (2) Continue to add supercritical carbon dioxide into the reaction kettle under the conditions of pressure 15Mpa and temperature 80°C, and stir for 4 hours;
[0054] (3) Keep the pressure at 15Mpa, slowly raise the temperature to 120°C, add fluorine-containing cymene to the reactor (the molar ratio of p-cymene-1-fluorine to o-cymene-5-fluorine is 1:2) , and stirred for 3h to obtain composition 3#.
[0055] Among them, in terms of parts by weight, 30 parts of supercritical carbon dioxide, 25 parts of polyoxyethylene alkanolamide, 25 parts of sodium c...
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