CN1257194C - Oil soluble frictional reducing polymer and preparing method thereof - Google Patents

Oil soluble frictional reducing polymer and preparing method thereof Download PDF

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Publication number
CN1257194C
CN1257194C CN 02148773 CN02148773A CN1257194C CN 1257194 C CN1257194 C CN 1257194C CN 02148773 CN02148773 CN 02148773 CN 02148773 A CN02148773 A CN 02148773A CN 1257194 C CN1257194 C CN 1257194C
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China
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drag reducing
oil soluble
reducing polymer
zirconium
monomer
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CN 02148773
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CN1500814A (en
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尹国栋
孙怡文
赵帆
张明
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SINO OIL KING SHINE CHEMICAL C
China National Petroleum Corp
China Petroleum Pipeline Engineering Corp
China Petroleum Pipeline Bureau Co Ltd
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China National Petroleum Corp
China Petroleum Pipeline Bureau Co Ltd
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Abstract

The present invention relates to an oil-soluble friction-reducing polymer which is polymerized from an alpha olefin monomer and/or a comonomer through the initiation of a homogeneous catalysis system composed of an organic cyclopentadienyl zirconium or cyclopentadienyl titanium transition metal complex and alkylaluminoxane, wherein the carbon number of the alpha olefin monomer is from 3 to 30; the comonomer is phenylethylene, vinyl acetate, acrylic acid or the high carbon alcohol ester of acrylic acid; the organic cyclopentadienyl zirconium or cyclopentadienyl titanium transition metal complex is ethylene bridged diindenyl zirconium dioxide, ethylene bridged hydro diindenyl zirconium dichloride or cyclopentadienyl titanium trichloride; alkylaluminoxane is methylaluminoxane or ethylaluminoxane. A preparation method comprises: the monomer is purified, and the purified monomer and/or the comonomer are precooled to sub 9 to sub 11 DEG C and are placed in a reaction bag; then, the alkylaluminoxane catalyst and the organic cyclopentadienyl zirconium or cyclopentadienyl titanium transition metal complex catalyst are added, and the reaction bag is vibrated for several times after sealing so that the catalyst is dispersed uniformly; the reaction bag is placed in a water bath at sub 20 DEG C to 30 DEG C, and a reaction is carried out for 12 to 72 hours; finally, the drag reduction rate of the obtained polymer is tested.

Description

Oil soluble drag reducing polymer and preparation method thereof
Technical field
The present invention relates to a kind of chemical additive that is used for carrying at product pipeline the minimizing transporting resistance, specifically is a kind of oil soluble drag reducing polymer and preparation method thereof.
Background technology
Oil phase dra is a kind of chemical additive that is applied to crude oil and products pipeline conveying, thereby be dissolved in and reduce the resistance of oil product when turbulent flow, the throughput rate that the increase flow velocity improves pipeline in the oil product, this method need not increase the fixture of pipeline, is the method for the adjusting pipeline throughput rate of a kind of convenience, economy.
Present industrialized flow improver product mostly is the homopolymer and the multipolymer of alhpa olefin, from product can be divided into gluey flow improver and pulpous state flow improver in form, corresponding production technique is that solution polymerization and mass polymerization are in conjunction with postprocessing working procedures (being generally pulverize at low temperature and pulping process).No matter the form of product how, the essence of reaction all is the coordinated anionic polymerization of alhpa olefin, what adopt is Z-N (Zieglar-Natta) catalyst system, Primary Catalysts is titanous chloride or titanium tetrachloride, and promotor is triethyl aluminum, triisobutyl aluminium, aluminium diethyl monochloride or its mixture.Such catalyst system is that a kind of nonhomogeneous system is that catalyzer is not dissolved in the reaction medium, and for solution polymerization, because reaction system remains at liquid state, catalyzer dispersive quality in reaction system is decided by the design of reaction vessel and decollator thereof.And for mass polymerization, because after reaction for some time, system is elastomeric solid, consider the discharging after polymerization is finished and the heat release problem of system, reactor design is that volume rises disposable plastic container at 3-5, decollator can not be installed in such reaction vessel again realize the homodisperse of catalyzer in system, like this, rise at system viscosity that catalyst fines is not reppd (to be formed different in during this period of time according to catalyst system, during this period of time usually at 30~60 minutes), the dispersion of catalyzer relies on constantly shaking of reactor to realize usually, the density of catalyzer and reaction monomers differs bigger, by shaking very difficult dispersed uniform, be easy to assemble at the edge catalyzer of reactor, and make local reaction too fast, viscosity increases, catalyzer can not be scatter again, therefore, produce homogeneity and the stability that frictional reducing polymer is difficult to guarantee product property by the heterogeneous mass polymerization of alhpa olefin.
Summary of the invention
The objective of the invention is to provide a kind of oil soluble drag reducing polymer that can reduce oil product turbulent resistance, increase flow velocity, improve the pipeline throughput rate.
Another object of the present invention is will provide a kind of can improve frictional reducing polymer homogeneity and stable preparation method.
The objective of the invention is to be achieved through the following technical solutions: a kind of oil soluble drag reducing polymer, it is formed by monomer alhpa olefin or comonomer initiated polymerization under equal the catalyst system that luxuriant zirconium or luxuriant titanium organic transition metal complex compound and alkylaluminoxane are formed.
Oil soluble drag reducing polymer of the present invention, the carbon number of wherein said monomer alhpa olefin are 3~30.
Oil soluble drag reducing polymer of the present invention, wherein said comonomer are vinylbenzene, vinyl acetate, vinylformic acid or vinylformic acid high-carbon alcohol ester.
Oil soluble drag reducing polymer of the present invention, the mol ratio of wherein said comonomer and alhpa olefin are 0.5: 100~15: 100.
Oil soluble drag reducing polymer of the present invention, the concentration of wherein said luxuriant zirconium or luxuriant titanium organic transition metal complex compound is 1.0 * 10 -4~5.0 * 10 -3Mol/L.
Oil soluble drag reducing polymer of the present invention, wherein said alkylaluminoxane are methylaluminoxane (MAO) or ethyl aikyiaiurnirsoxan beta (EAO).
Oil soluble drag reducing polymer of the present invention, the mol ratio of wherein said alkylaluminoxane and luxuriant zirconium or luxuriant titanium organic transition metal complex compound is 50~1000: 1.
Polyreaction formula of the present invention is as follows:
Homopolymerization
Figure C0214877300061
Wherein R is CH 3C 2H 5... C 28H 57Alkyl
Copolymerization
The preparation method of oil soluble drag reducing polymer: 1. at first monomer is purified, the content that makes its contained diolefine, oxygen and water is below 5ppm; 2. the monomer and/or the comonomer of purifying is pre-chilled to-9~-11 ℃, inserts in the reaction bag; 3. and then in reaction bag add alumoxane catalyst, add luxuriant zirconium or luxuriant titanium organic transition metal complex compound catalyst again; 4. with sealing machine mouth is sealed, concussion is uniformly dispersed catalyzer for several times; 5. be placed in-20~30 ℃ the water-bath, reacted 12~72 hours; 6. test the drag reducing efficiency of resulting polymers again, its test condition is: measurement length is 6m, and caliber is 1/4 inch, and the fluid Reynolds number is 14000.
Wherein, described reaction bag selects for use plastics bag that High-Pressure Polyethylene Film or multilayer complex films make as reactor, as select the MULTILAYER COMPOSITE membrane material for use, intermediate course is preferably selected nylon or EVA for use, can improve resistance oxygen, the water vapor ability of reactor like this, size is with after filling monomer, and center thickness is advisable at 2~5cm.Used plastics bag is of a size of 20 * 40cm among the present invention.
Positively effect of the present invention is to adopt metallocene catalysis system can well solve catalyzer dispersive problem in reaction system, thereby has fundamentally guaranteed all even stable of polymer production.
In addition, with in the past-Z-N (Zieglar-Natta) catalyst system is different, metallocene catalysis system can be selected the alkene conduct that has utmost point comonomer group for use, be used for the polarity of telomerized polymer, improve the state of polymer molecular chain in solution, thereby can improve the shear stability of frictional reducing polymer in solution.
Embodiment:
Below in conjunction with embodiment in detail the present invention is described in detail.
Embodiment 1.
The 1-octene is purified; the content that makes its contained diolefine, oxygen and water is below 5ppm; under nitrogen protection; be cooled to-10 ℃; getting 3 liters adds in the reaction bag; in monomer, add 43.5 grams MAO (concentration 0.25mol/L), add the ethylene abutment two indenyl zirconium dichloride (concentration 5 * 10 of 0.6753 gram again -4Mol/L), with reaction bag sealing machine good seal, vibration for several times is evenly distributed catalyzer in monomer, is placed in-8 ℃ the cooling bath, reacts 36 hours.The polymer dissolution that takes a morsel is made into the solution of 5ppm in O# diesel oil, the drag reducing efficiency of measuring polymkeric substance is 31.3% (test condition is: measuring pipeline length is 6m, and caliber is 1/4 inch, and the fluid Reynolds number is 14000).
Embodiment 2.
With 0.57 liter of 1-octene and 2.43 liters of the 1-laurylenes (mol ratio is 1: 3) after purifying, be pre-chilled to-10 ℃, be metered in the reaction bag, add the MAO (0.25mol/L) of 43.5 grams in monomer, (concentration is 5 * 10 to add the 0.6873 ethylene abutment two tetrahydro indenyl zirconium dichlorides that restrain again -4Mol/L), with sealing machine mouth is sealed, vibration for several times is uniformly dispersed catalyzer, is placed in-5 ℃ the water-bath reaction 48 hours, and the drag reducing efficiency of surveying resulting polymers is 35.5%, and test condition is with embodiment 1.
Embodiment 3.
With 2.9 liters of 1-octenes and 0.1 liter of the vinylbenzene (mol ratio 9: 1) after purifying, be pre-chilled to-10 ℃, add in the reaction bag, add 21.75 gram MAO (0.125mol/L) in monomer, (concentration is 5 * 10 to add the 0.6753 ethylene abutment two indenyl zirconium dichlorides that restrain again -4Mol/L), with sealing machine mouth is sealed, vibration is uniformly dispersed catalyzer for several times, and reaction is 36 hours in-10 ℃ cooling bath, and the drag reducing efficiency of measuring resulting polymers is 29.2%, and test condition is with embodiment 1.
Embodiment 4.
3 liters of 1-octenes after the purification and vinylformic acid 12 carbon alcohol esters 48.5 grams (mol ratio 99: 1) are pre-chilled to-10 ℃, add in the reaction bag, add the MAO (0.5mol/L) of 87 grams in monomer, and (concentration is 5.0 * 10 to add 0.3306 gram again -4Mol/L) cyclopentadienyl titanous chloride is sealed mouth with sealing machine, and vibration is uniformly dispersed catalyzer for several times, and reaction is 36 hours in-10 ℃ cooling bath, and the drag reducing efficiency of measuring resulting polymers is 33.6%, and test condition is with embodiment 1.
Embodiment 5.
2.96 liters of 1-octenes and 40 milliliters of vinyl acetates (mol ratio 49: 1) with after purifying are pre-chilled to-10 ℃, add in the reaction bag, add the EAO (0.5mol/L) of 108 grams in monomer, and (concentration is 5.0 * 10 to add 0.3306 gram again -4Mol/L) cyclopentadienyl titanous chloride is sealed with sealing machine, and vibration is uniformly dispersed catalyzer for several times, reacts 36 hours in-10 ℃ cooling bath again, and the drag reducing efficiency of measuring resulting polymers is 30.6%, and test condition is with embodiment 1.
Embodiment 6.
With 2.98 liters of 1-octenes and 20 milliliters in the vinylformic acid (mol ratio 99: 1) after purifying, be pre-chilled to-10 ℃, join in the reaction bag, add the MAO (0.5mol/L) of 87 grams in monomer, (concentration is 5 * 10 to add the 0.6873 ethylene abutment two tetrahydro indenyl zirconium dichlorides that restrain again -4Mol/L), with sealing machine mouth is sealed, vibration for several times is uniformly dispersed catalyzer, is placed in-8 ℃ the water-bath reaction 48 hours, and the drag reducing efficiency of measuring resulting polymers is 31.4%, and test condition is with embodiment 1.
The drag reducing efficiency data that the foregoing description 1-4 records are listed in the table 1.
Number of times by the test pipeline section Drag reducing efficiency
Example 1 Example 2 Example 3 Example 4
1 31.3% 35.5% 29.2% 33.6%
2 28.5 32.2 27.4 31.5
3 26.7 29.5 26.2 30.6
4 25.8 27.6 25.6 30.1
5 25.0 26.2 25.2 29.8
6 24.8 25.7 24.9 29.6
In addition, data declaration in the above-mentioned table through repeatedly test, though drag reducing efficiency has decline slightly, can keep property of reduction drag on the very long distance but still demonstrate the good polymkeric substance of shear resistant with each embodiment sample in the pipeline of practical application.In addition, adopt polar monomer as copolymerization units, its drag reduction by polymer effect that contains polar monomer is better than general polymkeric substance, as example 4.The fluid that does not add the drag reduction polymkeric substance, its drag reducing efficiency are zero.

Claims (9)

1. oil soluble drag reducing polymer is characterized in that: it is formed by monomer alhpa olefin or comonomer initiated polymerization under the homogeneous catalysis system that luxuriant zirconium or luxuriant titanium organic transition metal complex compound and alkylaluminoxane are formed.
2. oil soluble drag reducing polymer according to claim 1 is characterized in that: the carbon number of described monomer alhpa olefin is 3~30.
3. oil soluble drag reducing polymer according to claim 1 and 2 is characterized in that: described comonomer is vinylbenzene, vinyl acetate, vinylformic acid or vinylformic acid high-carbon alcohol ester.
4. oil soluble drag reducing polymer according to claim 3 is characterized in that: the mol ratio of described comonomer and alhpa olefin is 0.5: 100~15: 100.
5. oil soluble drag reducing polymer according to claim 1 is characterized in that: described luxuriant zirconium or luxuriant titanium organic transition metal complex compound are: ethylene abutment two indenyl zirconium dichlorides, ethylene abutment two tetrahydro indenyl zirconium dichlorides, cyclopentadienyl titanous chloride.
6. oil soluble drag reducing polymer according to claim 5 is characterized in that: the concentration of described luxuriant zirconium or luxuriant titanium organic transition metal complex compound is 1.0 * 10 -4~5.0 * 10 -3Mol/L.
7. oil soluble drag reducing polymer according to claim 1 is characterized in that: described alkylaluminoxane is methylaluminoxane (MAO) or ethyl aikyiaiurnirsoxan beta (EAO).
8. oil soluble drag reducing polymer according to claim 7 is characterized in that: the mol ratio of described alkylaluminoxane and luxuriant zirconium or luxuriant titanium organic transition metal complex compound is 50~1000: 1.
9. the preparation method of an oil soluble drag reducing polymer as claimed in claim 1, it is characterized in that: 1. at first monomer is purified, the content that makes its contained diolefine, oxygen and water is below 5ppm; 2. the monomer and/or the comonomer of purifying is pre-chilled to-9~-11 ℃, inserts in the reaction bag; 3. and then in reaction bag add alumoxane catalyst, add luxuriant zirconium or luxuriant titanium organic transition metal complex compound catalyst again; 4. with sealing machine mouth is sealed, concussion is uniformly dispersed catalyzer for several times; 5. be placed in-20~30 ℃ the water-bath, reacted 12~72 hours; 6. test the drag reducing efficiency of resulting polymers again.
CN 02148773 2002-11-19 2002-11-19 Oil soluble frictional reducing polymer and preparing method thereof Expired - Fee Related CN1257194C (en)

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CN102453297B (en) * 2010-10-28 2013-10-16 中国石油天然气股份有限公司 Supermolecular polymer drag reduction agent for oil products and preparation method thereof
CN109593153B (en) * 2018-12-19 2021-05-28 沈阳宏城精细化工科技有限公司 Preparation method of modified poly-alpha-olefin
GB201901496D0 (en) 2019-02-04 2019-03-27 Innospec Ltd Chemical reactions
GB201901503D0 (en) 2019-02-04 2019-03-27 Innospec Ltd Chemical reactions
CN113004644B (en) * 2021-03-01 2021-12-24 山东大学 Associative oil-soluble high polymer drag reducer and application thereof

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Address before: 100724, Xicheng District, Beijing six shop pit No. 6

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