Preparation method of hydrate inhibitor modified on basis of polyvinyl pyrrolidone
A technology of polyvinylpyrrolidone and hydrate inhibitor, which is applied in the directions of drilling compositions, chemical instruments and methods, mechanical equipment, etc., can solve problems such as insoluble and ineffective, and achieves simple synthesis method, inhibiting Good effect, high purity effect
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[0020] Example 1
[0021] The preparation method based on the polyvinylpyrrolidone modified hydrate inhibitor comprises the following steps:
[0022] (1) Add the chain initiator azobisisobutyronitrile into a three-necked flask equipped with a thermometer, a condenser tube and a N2 conduit, seal it, vacuumize it, and then pass in nitrogen;
[0023] (2) Inject 1-vinyl-2-pyrrolidone, chain transfer agent, and N,N'-diformamide into the system in step (1) in sequence, then vacuumize and pass nitrogen gas; wherein, the The chain transfer agent is 1-butylamine or glacial acetic acid; the chain initiator azobisisobutyronitrile, 1-vinyl-2-pyrrolidone, chain transfer agent, N,N'-diformamide The addition ratio is 180mg:11mL:280μL:50mL;
[0024] (3) Under a nitrogen atmosphere, the product of step (2) was reacted at 70°C for 6 hours, and naturally cooled to room temperature;
[0025] (4) Evaporate the product of step (3) at 95°C for 30 minutes. After cooling, add 4 times the volume of N,N
Example Embodiment
[0026] Example 2
[0027] The preparation method based on the polyvinylpyrrolidone modified hydrate inhibitor comprises the following steps:
[0028] (1) Add the chain initiator azobisisobutyronitrile into a three-necked flask equipped with a thermometer, a condenser tube and a N2 conduit, seal it, vacuumize it, and then pass in nitrogen;
[0029] (2) Inject 1-vinyl-2-pyrrolidone, chain transfer agent, and N,N'-diformamide into the system in step (1) in sequence, then vacuumize and pass nitrogen gas; wherein, the The chain transfer agent is 1-butylamine or glacial acetic acid; the chain initiator azobisisobutyronitrile, 1-vinyl-2-pyrrolidone, chain transfer agent, N,N'-diformamide The addition ratio is 180mg:11mL:280μL:50mL;
[0030] (3) Under a nitrogen atmosphere, the product of step (2) was reacted at 90°C for 10 hours, and naturally cooled to room temperature;
[0031] (4) Evaporate the product of step (3) at 105°C for 60 minutes. After cooling, add ethyl acetate dropwise
Example Embodiment
[0032] Example 3
[0033] The preparation method based on the polyvinylpyrrolidone modified hydrate inhibitor comprises the following steps:
[0034] (1) Add the chain initiator azobisisobutyronitrile into a three-necked flask equipped with a thermometer, a condenser tube and a N2 conduit, seal it, vacuumize it, and then pass in nitrogen;
[0035] (2) Inject 1-vinyl-2-pyrrolidone, chain transfer agent, and N,N'-diformamide into the system in step (1) in sequence, then vacuumize and pass nitrogen gas; wherein, the The chain transfer agent is 1-butylamine or glacial acetic acid; the chain initiator azobisisobutyronitrile, 1-vinyl-2-pyrrolidone, chain transfer agent, N,N'-diformamide The addition ratio is 180mg:11mL:280μL:50mL;
[0036] (3) Under a nitrogen atmosphere, the product of step (2) was reacted at 80°C for 8 hours, and naturally cooled to room temperature;
[0037] (4) Rotate the product of step (3) at 100°C for 450 minutes. After cooling, add ethyl acetate dropwise wit
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