Drag reducer and preparation method thereof

A technology of drag reducer and release agent, which is applied in mechanical equipment, gas/liquid distribution and storage, pipeline system, etc. It can solve the problems of high viscosity of the system, cumbersome operation process, high reaction heat, etc., so as to slow down the agglomeration, The effect of simplifying the production process and slowing down the rise of polymer particles

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
3 Cites 20 Cited by

AI-Extracted Technical Summary

Problems solved by technology

One problem with bulk polymerization is that due to the extremely high heat of reaction generated by bulk polymerization and the high viscosity of the system, it is necessary to divide the p...
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Method used

Get 0.8g calcium stearate powder (particle size is 80 orders~100 orders), join in 20g simethicone oil (300cst), add 0.4g tensio-active agent, stir with glass rod, pour in test tube Stand still and observe. At the same time, the blank test without adding surfactant was used, and the test results are shown in Table 1. As can be seen from Table 1, adding surfactants can greatly delay the sedimentation of calcium stearate in silicone oil, and enhance the stability of calcium stearate-silicone oil dispersion system, wherein cocamidopropyl betaine, α-alkenyl sulfonate Sodium (18) and sodium petroleum sulfonate are more effective.
[0046] G...
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Abstract

The invention provides a drag reducer and a preparation method thereof. The drag reducer is a suspension liquid containing poly(alpha-alkene), silicone oil, an isolating agent, and a surfactant. The preparation method comprises the following steps: (1) subjecting alpha-alkene to coordination polymerization in silicone oil; (2) mixing the system obtained in the step (1) with an isolating agent after the coordination polymerization, and then adding a surfactant so as to obtain the suspension liquid. The drag reducer has the advantages of good stability, low viscosity, good fluidity, and user-friendliness. The preparation method is simple and can be easily applied to the industry.

Application Domain

Technology Topic

Drag reducing agentUser friendliness +8

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  • Drag reducer and preparation method thereof
  • Drag reducer and preparation method thereof
  • Drag reducer and preparation method thereof

Examples

  • Experimental program(4)

Example Embodiment

[0037] Example 1
[0038] This example is used to illustrate the stabilizing effect of the surfactant on the suspension system.
[0039] In the embodiment, agent 1 is Tween 40; agent 2 is Span 60; agent 3 is octylphenol polyoxyethylene ether (4); agent 4 is isooctylphenol polyoxyethylene ether (7); agent 5 is Fatty alcohol polyoxyethylene ether disodium sulfosuccinate; agent 6 is coconut oil amidopropyl betaine; agent 7 is sodium α-alkenyl sulfonate (18); agent 8 is nonylphenol polyoxyethylene ether phosphate ; Agent 9 is sodium petroleum sulfonate.
[0040] Take 0.8g calcium stearate powder (with a particle size of 80-100 mesh), add it to 20g simethicone (300cst), add 0.4g surfactant, stir evenly with a glass rod, pour it into a test tube and let it stand for observation . At the same time, the blank test without surfactant is used. The test results are shown in Table 1. It can be seen from Table 1 that the addition of surfactants can greatly delay the sedimentation of calcium stearate in silicone oil and enhance the stability of the calcium stearate-silicone oil dispersion system. Among them, coconut oil amidopropyl betaine and α-alkenyl sulfonate Sodium (18) and petroleum sodium sulfonate are more effective.
[0041] Table 1 Comparison of stability of calcium stearate-silicone oil suspension system
[0042]

Example Embodiment

[0043] Example 2
[0044] This example is used to illustrate the stabilizing effect of the surfactant on the drag reducer suspension system.
[0045] In the examples, agent 1 is sodium petroleum sulfonate; agent 2 is cocoamidopropyl betaine; agent 3 is sodium α-ene sulfonate (18).
[0046] Take 10g of the bulk polymerized rubbery drag reducer polymer, mix it with 5g of calcium stearate, and pulverize into powder with a low-temperature pulverizer. Take 1g of the pulverized powder and add it to 20g of simethicone (300cst) containing 0.4g of surfactant, stir well and then stand for observation. At the same time, the blank test without surfactant is used. The test results are shown in Table 2. It can be seen from Table 2 that the addition of surfactants can greatly reduce the precipitation rate within the specified time and enhance the stability of the system. Among them, the effect of sodium petroleum sulfonate is better.
[0047] Table 2 Comparison of stability of drag reducer suspension system
[0048]

Example Embodiment

[0049] Example 3
[0050] This example is used to illustrate the preparation method of poly-α-olefin/dimethyl silicone oil slurry.
[0051] The polymerization catalyst used is prepared by the following method: add 2.0 grams of magnesium ethoxide particulate carrier (the particle diameter is 40-50 microns) and 30 ml of toluene into the reaction flask, and after uniform dispersion, reduce the temperature to -10°C, add 10 ml (6.0 mol) )TiCl 4 , Stay for 0.5 hours, add 0.6ml (0.39mol) diisobutyl phthalate to 80°C, react for 2 hours at 110°C, settle, filter, and wash twice with toluene (20ml each time) ,Second loading titanium, add 5ml (3.0mmol) TiCl 4 Reacted with 30ml of toluene for 1 hour, settled, filtered, washed with hexane 4 times, and dried at 72°C to obtain a catalyst solid component. The mass percentage of titanium in the catalyst is 2.87%.
[0052] Mix 35g of 1-octene refined by molecular sieve (purchased from ACROS Reagent Company) and 65g of simethicone refined by molecular sieve (purchased from Beijing Dingye Industry and Trade Co., Ltd., viscosity at 25°C is 300 centipoise) , Under anhydrous and oxygen-free conditions, add 2.5mL 1.1M triisobutyl aluminum toluene solution and 0.3mL 1.0M cyclohexyl methyl dimethoxy silane solution, at -7 ℃, pressure 0.1MPa After stirring for 10 minutes, 70 mg of catalyst was added, and the reaction was stirred for 6 hours at -7°C and a pressure of 0.1 MPa to obtain a poly-α-olefin/dimethyl silicone oil slurry. At 25° C., the poly-α-olefin/dimethyl silicone oil slurry was mixed and stirred with isopropanol, filtered, repeated 4-5 times, and dried at 70° C. to obtain 33 g of poly-α-olefin.
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