A kind of polyamine inhibitor containing sulfonic acid group and preparation method thereof
A technology containing a sulfonic acid group and a shale inhibitor, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as limitations and environmental pollution, and achieve high-efficiency inhibition performance, improved salt resistance, and temperature resistance. The effect of improved performance
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Embodiment 1
[0022] First set the reaction temperature to 65°C, stir and pass ethylene oxide into diethylenetriamine and add 1,3-propane sultone dropwise. The molar ratio of diethylenetriamine to ethylene oxide is 1:2, the molar ratio of diethylenetriamine to 1,3-propane sultone is 1:0.7, control the reaction temperature not lower than 60°C, react for 2.5h; then raise the temperature to 85°C, under stirring conditions Add epichlorohydrin dropwise, the mol ratio of epichlorohydrin to diethylenetriamine is 0.6:1, the reaction time is 1.5h, and finally add terminator concentrated hydrochloric acid, the mol ratio of concentrated hydrochloric acid to diethylenetriamine is 1: 1. The polyamine shale inhibitor was prepared after 1 hour of reaction.
Embodiment 2
[0024] Set the reaction temperature to 75°C, stir and add propylene oxide and 1,4-butane sultone dropwise into triethylenetetramine, the molar ratio of triethylenetetramine to propylene oxide is 1:3, The molar ratio of triethylenetetramine to 1,4-butane sultone is 1:0.5, control the reaction temperature not lower than 70°C, and react for 2 hours; then raise the temperature to 90°C, and add epoxy chlorine dropwise under stirring The molar ratio of propane, epichlorohydrin and diethylenetriamine is 0.5:1, and the reaction time is 1h; finally, the terminator formic acid is added, and the molar ratio of formic acid to diethylenetriamine is 1.5:1, and the reaction time is 1h. Polyamine shale inhibitors.
Embodiment 3
[0026] Set the reaction temperature to 85°C, stir and add propylene oxide and 1,4-butane sultone dropwise into tetraethylenepentamine, the molar ratio of tetraethylenepentamine to propylene oxide is 1:2.5, The molar ratio of tetraethylenepentamine to 1,4-butane sultone is 1:0.8, control the reaction temperature not lower than 80°C, react for 1.5h; then raise the temperature to 100°C, add epoxy dropwise under stirring condition Chloropropane, the molar ratio of epichlorohydrin to diethylenetriamine is 0.8:1, and the reaction time is 1.5h; finally add the terminator acetic acid, the molar ratio of acetic acid to diethylenetriamine is 1.8:1, and react for 1h Finally, polyamine shale inhibitors are prepared.
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