Acidification diversion agent octadecylbutyldihydroxyethyl ammonium bromide and its preparation method and use
A technology of octadecyl butyl dihydroxyethyl ammonium bromide and octadecyl butyl dihydroxyethyl ammonium bromide, which is applied in the acidification steering agent octadecyl butyl dihydroxyethyl ammonium bromide Ammonium and its preparation and application fields can solve the problem of high viscosity, but when it comes into contact with crude oil or hydrocarbons, it will automatically reduce the viscosity, etc., and achieve the effects of low toxicity, reduced acid fluid loss, and good adsorption
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Embodiment 1
[0052] Embodiment 1: the preparation of octadecyl butyl dihydroxyethyl ammonium bromide
[0053] (1) Condensation reaction
[0054] Take 0.05mol diethanolamine and 0.05mol n-bromobutane and mix them into a 500mL three-necked flask with a condensing reflux device, then add 0.05mol sodium bicarbonate (for removing the hydrogen bromide generated by the reaction), and place at a constant temperature In an oil bath, stir and reflux at 100°C for 4 hours, and distill off the generated water under reduced pressure to obtain the slightly viscous, dark yellow liquid N-butyldiethanolamine solution of the intermediate product.
[0055] (2) Quaternization reaction
[0056] Take the tertiary amine obtained in the previous step reaction and put it into a 500mL three-necked flask, add 0.05mol bromooctadecane and 0.05mol sodium bicarbonate, put it in a constant temperature oil bath, stir and reflux at 140°C for 10h, and distill under reduced pressure. The resulting water is produced, and fin...
Embodiment 2
[0057] Embodiment 2, with the octadecyl butyl dihydroxyethyl ammonium bromide prepared in embodiment 1, the concentration of preparing 5 groups of octadecyl butyl dihydroxyethyl ammonium bromide is respectively 4%, 5%, 6%, 7%, 8% residual acid solution, the method is as follows:
[0058] (1) Take 5 clean beakers (200mL in size), and add 74g, 73g, 72g, 71g, 70g of distilled water into the 5 beakers in turn;
[0059] (2) Weigh 5 groups of CaCl at room temperature 2 Solids, 22g in each group, were added to 5 beakers filled with distilled water, and stirred until uniform; at room temperature, octadecylbutyldihydroxyethylammonium bromide was added respectively, and each group was 4g, 5g, 6g, 7g, 8g, stir until uniform;
[0060] (3) Add hydrochloric acid respectively in above-mentioned 5 groups of solutions, the pH value of 5 groups of solutions is adjusted to 5.4, the concentration that makes octadecyl butyl dihydroxyethyl ammonium bromide is 4%, 5%, 6%. , 7%, 8% residual acid s...
Embodiment 3
[0065] Embodiment 3, with the octadecyl butyl dihydroxyethyl ammonium bromide prepared in embodiment 1, the preparation of 4 groups of pH values is respectively 4, 5, 6, and 7 residual acid solutions, and the method is as follows:
[0066] (1) Take 4 clean beakers (200mL in size), and add 72g of distilled water to each beaker;
[0067] (2) Weigh 4 groups of CaCl respectively at room temperature 2 Solids, 22g in each group, were added to 4 beakers filled with distilled water, and stirred until uniform; respectively, octadecylbutyldihydroxyethylammonium bromide was added, 6g in each group, and stirred until uniform;
[0068] (3) Add hydrochloric acid to the above four groups of solutions respectively, and adjust the pH values of the solutions to 4, 5, 6 and 7 respectively.
[0069] The above four groups of residual acid solution CaCl 2 The concentration is 22%, the concentration of octadecylbutyldihydroxyethylammonium bromide is 6%, and the pH values are respectively 4, ...
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