Drag reduction composition and preparation method thereof
A composition and content technology, applied in mechanical equipment, gas/liquid distribution and storage, pipeline system, etc., can solve the problems of cumbersome operation and complicated process, and achieve the effects of good storage stability, simple preparation process and convenient use
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0037] More preferably, in order to generate polyalphaolefin in situ and ensure that it can be directly and uniformly dispersed without low-temperature pulverization, according to a preferred embodiment of the present invention, the preparation method of the drag-reducing composition includes the following step:
[0038] (1) Under olefin polymerization conditions and in the presence of silicone oil, the α-olefin monomer is contacted with the olefin polymerization catalyst system, so that a mixture of poly α-olefin and silicone oil with an intrinsic viscosity of 10 dL / g or more is obtained;
[0039] (2) the mixture of polyalpha-olefin and silicone oil that step (1) obtains is mixed with release agent and solvent; Described release agent is selected from stearic acid, stearate, stearic acid amine and stearate One or more of them; the solvent is a polar solvent.
[0040] Although the dosage range of each substance in the drag reducing composition can be changed within a wide ran...
Embodiment 1
[0071] This example is used to illustrate the preparation of polyalphaolefin and drag reducing composition.
[0072] 1) Preparation of polyalphaolefin:
[0073] Mix 21.3 g of 1-octene refined with molecular sieves (purchased from ACROS Reagent Company) with 9.6 g of methyl silicone oil refined with molecular sieves (purchased from Beijing Dingye Industry and Trade Co., Ltd., viscosity at 25°C is 300 centipoise) , under the protection of nitrogen, add 0.68mL of 1.1M triisobutylaluminum toluene solution and 0.08mL of 1.0M cyclohexylmethyldimethoxysilane solution, and stir for 10 minutes at -7°C and pressure of 0.1MPa Afterwards, 25.2 mg of Ziegler-Natta catalyst was added, and the reaction was stirred for 6 hours at -7°C under a pressure of 0.1 MPa to obtain a polyα-olefin / methyl silicone oil slurry (polyα-olefin particle diameter is 150 microns), recorded as mixture A1. At 25°C, mix and stir the polyα-olefin / methyl silicone oil slurry with isopropanol, wash 4-5 times, remove ...
Embodiment 2
[0077] This example is used to illustrate the preparation of polyalphaolefin and drag reducing composition.
[0078] 1) Preparation of polyalphaolefin:
[0079]Take 21.3g of 1-octene (purchased from ACROS Reagent Company) refined by molecular sieves and mix with 4.8g of methylphenyl silicone oil (purchased from ACROS Reagent Company, whose viscosity at 25° C. is 2000 centipoise) purified by molecular sieves, Under nitrogen protection, add 1.0mL of 1.1M triisobutylaluminum toluene solution and 0.09mL of 1.0M cyclohexylmethyldimethoxysilane solution, and stir for 10 minutes at -7°C under a pressure of 0.1MPa , add 32.4mg Ziegler-Natta catalyst, at -7 ℃, under the pressure of 0.1MPa, stir and react for 6 hours to obtain polyα-olefin / methylphenyl silicone oil slurry (polyα-olefin particle diameter is 200 microns), denoted as Mixture A2. At 25°C, mix and stir the polyα-olefin / methyl silicone oil slurry with isopropanol, wash 4-5 times, remove the methyl silicone oil, and dry at 7...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More