In situ synthesis method for expanded graphite poly alpha olefin compound drag reducer
A technology of expanded graphite and in-situ synthesis, applied in gas/liquid distribution and storage, mechanical equipment, piping systems, etc., can solve the problems of molecular chain molecular weight reduction, loss of drag reduction function, etc., to improve drag reduction and shear resistance Shear characteristics, obvious drag reduction effect, and excellent shear resistance
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Embodiment 1
[0021] Embodiment 1: The in-situ synthesis method of a kind of expanded graphite / polyalphaolefin composite drag reducer solution mentioned in the present invention comprises the following steps:
[0022] First, weigh 20g of expandable graphite in a beaker, heat it in a microwave oven for 60s, take it out, and cool it at room temperature; repeat this step 3 times to obtain expanded graphite; Transfer the graphite to a three-necked flask filled with concentrated sulfuric acid, disperse it uniformly by ultrasonic dispersion at room temperature for 30 minutes; then reflux at 70°C for 20 hours; after cooling, filter and wash until the pH of the filtrate is 7; dry in a vacuum oven for 24 hours.
[0023] Under a nitrogen atmosphere, add 2 g of chlorobutane to 100 g of tetrahydrofuran (THF), then add 4 g of magnesium metal, and stir at a slow speed for 30 min to prepare n-BuMgCl reagent.
[0024] Add 10 g of processed expanded graphite into 50 g of tetrahydrofuran, add 10 g of n-BuMgC...
Embodiment 2
[0028] Embodiment 2: The in-situ synthesis method of a kind of expanded graphite / polyalphaolefin composite drag reducer solution mentioned in the present invention comprises the following steps:
[0029] First, weigh 20g of expandable graphite in a beaker, heat it in a microwave oven for 30s, take it out, and cool it at room temperature; repeat this step 10 times to obtain expanded graphite; In a three-necked flask, ultrasonically disperse at room temperature for 60 minutes to disperse evenly; then reflux at 90°C for 10 hours; after cooling, filter and wash until the pH of the filtrate is 7; dry in a vacuum oven for 24 hours.
[0030] Under a nitrogen atmosphere, add 2 g of chlorobutane to 100 g of tetrahydrofuran (THF), then add 2 g of magnesium metal, and stir at a slow speed for 30 min to prepare n-BuMgCl reagent.
[0031] Add 10 g of the treated expanded graphite into 100 g of tetrahydrofuran, add 10 g of n-BuMgCl reagent into it slowly and uniformly under the protection o...
Embodiment 3
[0035] Embodiment 3: The in-situ synthesis method of a kind of expanded graphite / polyalphaolefin composite drag reducer solution mentioned in the present invention comprises the following steps:
[0036] First, weigh 20g of expandable graphite in a beaker, heat it in a microwave oven for 45s, take it out, and cool it at room temperature; repeat this step 6 times to obtain expanded graphite; In a three-necked flask, ultrasonically disperse at room temperature for 45 minutes to disperse evenly; then reflux at 80°C for 15 hours; after cooling, filter and wash until the pH of the filtrate is 7; dry in a vacuum oven for 36 hours.
[0037] Under a nitrogen atmosphere, add 2 g of chlorobutane to 100 g of tetrahydrofuran (THF), then add 3 g of magnesium metal, and stir at a slow speed for 30 min to prepare n-BuMgCl reagent.
[0038] Add 10 g of the treated expanded graphite into 80 g of tetrahydrofuran, add 10 g of n-BuMgCl reagent into it slowly and uniformly under the protection of ...
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