Preparation method of imidazoline inhibitor applicable to drilling fluid
An imidazoline and inhibitor technology, applied in the field of preparation of imidazoline inhibitors, can solve the problems of loss of inhibitory effect and limited adsorption capacity, and achieve the effects of small influence on rheology, stable filtration performance and good compatibility.
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Embodiment 1
[0022] Add lauric acid A and diethylenetriamine B (molar ratio: 2: 1.2) into the reaction kettle, and keep stirring to make them fully mixed.
[0023] The reaction mass was cooled to below 100°C.
[0024] Then reduce the pressure to 0.5kPa, raise the temperature to 240°C, keep the temperature, and react for about 4 hours.
[0025] Stop heating, let the intermediate product cool naturally to 120°C, pour it into the crystallization kettle while it is hot, and cool and condense into a brown-yellow substance, which is the product.
Embodiment 2
[0027] Add caprylic acid A and triethylenetetramine B (molar ratio: 2: 1.05) into the reaction kettle, and keep stirring to make them fully mixed.
[0028] The reaction mass was cooled to below 100°C.
[0029] Then reduce the pressure to 0.7kPa, raise the temperature to 240°C, keep the temperature, and react for about 6h.
[0030] Stop heating, let the intermediate product cool naturally to 110°C, pour it into the crystallization kettle while it is hot, and cool and condense into a brown-yellow substance, which is the product.
Embodiment 3
[0032] Add oleic acid A and diethylenetriamine B (molar ratio: 2: 1.5) into the reaction kettle, and keep stirring to make them fully mixed.
[0033] The reaction mass was cooled to below 100°C.
[0034] Then reduce the pressure to 0.6kPa, raise the temperature to 240°C, keep the temperature, and react for about 8 hours.
[0035] Stop heating, let the intermediate product cool naturally to 120°C, pour it into the crystallization kettle while it is hot, and cool and condense into a brown-yellow substance, which is the product.
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