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Oil soluble frictional reducing polymer and preparing method thereof

A polymer and oil-soluble technology, applied in mechanical equipment, pipeline systems, gas/liquid distribution and storage, etc., can solve problems such as increased viscosity, difficult to disperse uniformly, large difference in density between catalysts and reactive monomers, etc., to achieve improvement State, the effect of improving shear stability

Inactive Publication Date: 2006-05-24
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For bulk polymerization, because the system is a rubber-like solid after a period of reaction, considering the discharge of the polymerization and the heat release of the system, the reactor is designed as a disposable plastic container with a volume of 3-5 liters. It is impossible to install a disperser in such a reaction vessel to achieve uniform dispersion of the catalyst in the system. In this way, during the time when the viscosity of the system rises to the point where the catalyst powder no longer precipitates (according to the composition of the catalytic system, this period is usually In 30-60 minutes), the dispersion of the catalyst is usually achieved by the continuous shaking of the reactor. The density difference between the catalyst and the reaction monomer is relatively large, and it is difficult to disperse evenly by shaking. Agglomeration, so that the local reaction is too fast, the viscosity increases, and the catalyst can no longer be dispersed. Therefore, it is difficult to ensure the uniformity and stability of product properties by producing drag-reducing polymers through heterogeneous bulk polymerization of α-olefins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Purify 1-octene so that the content of diolefins, oxygen and water contained in it is below 5ppm. Under the protection of nitrogen, cool to -10°C, take 3 liters and add it to the reaction bag, and add 43.5 grams to the monomer MAO (concentration 0.25mol / L), then add 0.6753 grams of ethylene bridging base bisindenyl zirconium dichloride (concentration 5 × 10 -4 mol / L), the reaction bag was sealed with a sealing machine, oscillated several times to make the catalyst evenly distributed in the monomer, placed in a cold water bath at -8°C, and reacted for 36 hours. Get a small amount of polymkeric substance and dissolve in O# diesel oil, be made into the solution of 5ppm, measure the drag reduction rate of polymkeric substance 31.3% (test condition is: measuring pipeline length is 6m, pipe diameter is 1 / 4 inch, fluid Reynolds number is 14000).

Embodiment 2

[0025] 0.57 liters of purified 1-octene and 2.43 liters of 1-dodecene (molar ratio is 1:3), pre-cooled to -10 ° C, metered into the reaction bag, and added 43.5 grams of MAO ( 0.25mol / L), then add 0.6873 grams of ethylene bridging base ditetrahydroindenyl zirconium dichloride (concentration is 5 × 10 -4 mol / L), use a sealing machine to seal the mouth, oscillate several times to disperse the catalyst evenly, place it in a water bath at -5°C for 48 hours, and measure the drag reduction rate of the obtained polymer to be 35.5%. The test conditions are the same as those in the implementation example 1.

Embodiment 3

[0027] 2.9 liters of purified 1-octene and 0.1 liter of styrene (molar ratio 9:1), pre-cooled to -10 ° C, added to the reaction bag, and 21.75 grams of MAO (0.125 mol / L) was added to the monomer, Then add 0.6753 grams of ethylene bridging base bisindenyl zirconium dichloride (concentration is 5×10 -4 mol / L), use a sealing machine to seal the mouth, oscillate several times to make the catalyst evenly dispersed, react in a cold water bath at -10°C for 36 hours, and measure the drag reduction rate of the obtained polymer to be 29.2%. The test conditions are the same as the implementation example 1.

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Abstract

The present invention relates to one kind of oil soluble drag-reducing polymer polymerized with alpha-olefin monomer and / or comonomers under the initiation of homogeneous catalyst system of organic transition metal complex of cyclopentadienyl zirconium or titanium and alkyl alum inoxane. The alpha-olefin monomer is C3-C30 monomer; the comonomers include styrene, vinyl acetate, acrylic acid and high-carbon alcohol ester of acrylic acid; the organic transition metal complex of cyclopentadienyl zirconium or titanium is ethylene bridged diindenyl zirconium dioxide, ethylene bridged hydro diindenyl zirconium dichloride or cyclopentadienyl titanium trichloride; and the alkyl alum inoxane is methyl alum inoxane or ethyl alum inoxane. The preparation process includes purifying monomer, precooling monomer and / or comonomers to -9 to 11 deg.c, adding the catalyst system, vibrating to homogenize catalyst, reaction in water bath at -20 to 30 deg.c and test drag reducing rate.

Description

technical field [0001] The invention relates to a chemical additive for reducing transportation resistance in pipeline transportation of oil products, in particular to an oil-soluble drag-reducing polymer and a preparation method thereof. Background technique [0002] Oil phase drag reducer is a chemical additive used in crude oil and refined oil pipeline transportation. Dissolving in oil products can reduce the resistance of oil products in turbulent flow, increase the flow rate and thus increase the pipeline throughput. This method does not need to increase the pipeline It is a convenient and economical way to adjust the pipeline volume. [0003] At present, most of the industrial drag reducer products are homopolymers and copolymers of α-olefins, which can be divided into colloidal drag reducer and slurry drag reducer in terms of product form, and the corresponding production process is a combination of solution polymerization and bulk polymerization. Post-treatment proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00F17D1/17
Inventor 尹国栋孙怡文赵帆张明
Owner BC P INC CHINA NAT PETROLEUM CORP
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