Preparation method of N-polyvinylcaprolactam solution taken as kinetic hydrate inhibitor
A technology for vinyl caprolactam and hydrate inhibitor, which is applied in the field of preparation of poly-N-vinyl caprolactam solution, can solve the problems of increased production cost, increased solvent consumption, complicated process, etc., and achieves improved production efficiency and improved compounding performance, the effect of reducing environmental pollution
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[0014] Example 1
[0015] Weigh 300g of N-vinylcaprolactam, measure 500ml of methanol, add to a 1000ml three-necked flask, pass nitrogen protection, stir and heat to dissolve, dissolve 0.6g of azobisisopropylimidazoline hydrochloride in 100ml of methanol, Add dropwise to a three-necked flask, raise the temperature to 65° C., stir and react for 6 hours; lower the temperature to 30° C., add 400 ml of methanol, and stir for about 0.5 hours to obtain a poly-N-vinyl caprolactam methanol solution.
[0016] Tests by the high-pressure method show that the polymer solution has a good inhibitory effect on natural gas hydrate, and the inhibition time is about 18.8 hours.
Example Embodiment
[0017] Example 2
[0018] Weigh 300g of N-vinylcaprolactam, measure 500ml of methanol, add to a 2000ml three-necked flask, pass nitrogen protection, stir and heat to dissolve, dissolve 0.6g azobisisopropylimidazoline hydrochloride in 100ml methanol, Dropped into a three-necked flask, heated to 65°C, stirred for 6h; cooled to 30°C, added 600ml methanol and stirred for about 0.5h to obtain a methanol solution of poly-N-vinylcaprolactam.
[0019] The high-pressure test shows that the polymer solution has a good inhibitory effect on natural gas hydrate, and the inhibition time is about 18.5 hours.
Example Embodiment
[0020] Example 3
[0021] Weigh 300g of N-vinylcaprolactam, measure 500ml of methanol, add to a 2000ml three-necked flask, pass nitrogen protection, stir and heat to dissolve, dissolve 0.6g azobisisopropylimidazoline hydrochloride in 100ml methanol, Dropped into a three-necked flask, heated to 65°C, stirred for 6h; cooled to 30°C, added 800ml methanol and stirred for about 0.5h to obtain a poly-N-vinylcaprolactam methanol solution.
[0022] Tests by the high-pressure method show that the polymer solution has a good inhibitory effect on natural gas hydrate, and the inhibition time is about 18.3 hours.
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