CN1041952A - The catalyst system that is used for olefinic polymerization - Google Patents
The catalyst system that is used for olefinic polymerization Download PDFInfo
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- CN1041952A CN1041952A CN 89108996 CN89108996A CN1041952A CN 1041952 A CN1041952 A CN 1041952A CN 89108996 CN89108996 CN 89108996 CN 89108996 A CN89108996 A CN 89108996A CN 1041952 A CN1041952 A CN 1041952A
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Abstract
By a kind of transition metal component be selected from the period of element Table I to a kind of co-catalyst of the organometallic compound of III family metal and may combine with a kind of electron donor and the catalytic systems for polymerization of olefins formed, wherein employed transition metal component is to be contacted with a kind of organo-aluminium compound by a kind of halo, the alkylation of magnesium or the compound that contains alkoxyl group, form a kind of organic-magnesium-aluminium-pasc reaction product, make reaction product bear chlorization then, and it is handled by the compound of a kind of transition metal such as titanium, vanadium, zirconium and chromium.
Description
The present invention relates to a kind of preparation method of transition metal component of catalyst system of polymerization of alkene.The present invention with contain the catalyst system of this constituent, and relevant with the synthetic method of a kind of olefin homo of this catalyst system of application or multipolymer.
People know, the high molecular weight olefin homopolymer or the multipolymer that contain a small amount of ash, can utilize by a kind of transition metal component and a kind of co-catalyst that often contains a kind of alkyl aluminium or alkyl magnesium to combine and the catalyst system of the Ziegler-Natta type formed, to alkene such as ethene and higher homologue thereof, propylene especially, 1-butylene, the 1-amylene, 4-methyl-1-pentene, 1-hexene, the 1-octene carries out polymerization or copolymerization and obtains.Transition metal component generally can be by a kind of transistion metal compound, and titanium compound especially is as Ti Cl
4, Ti Cl
3Perhaps alkyl titanate especially contains Mg Cl with a kind of magnesium compound
2Compound and organic compound that may a kind of electron donor, where necessary, also have inorganic or organic porous carrier to combine and obtain.
The preparation method of known a kind of transition metal component comprises at first in a kind of inert hydrocarbon, react by a kind of dialkyl magnesium or alkyl halide magnesium compound with a kind of aluminum alkyls or a kind of aikyiaiurnirsoxan beta, form a kind of reaction product that can be dissolved in the organic-magnesium-aluminium complex of hydro carbons, then obtained reactant by in addition chlorination of HCl, at last this chlorination obtained excessively contain Mg Cl
2Solid product, handle with a kind of transistion metal compound such as a kind of alkyl titanate.
After having studied the above-mentioned reaction scheme that obtains transition metal component, the present patent application person finds, if replace the aluminum alkyls that reacts with dialkyl magnesium or alkyl halide magnesium compound or aluminium silicone compounds to form the reaction product of organic-magnesium-aluminium-silicon complex with a kind of derivative of as the aluminium siloxanes that hereinafter limits, then can obtain better result.
In fact, adopted the aluminium silicone derivative can make transition metal component more effective, it can be given and have the activity of higher polymerization and more good performance by this transition metal component with a kind of co-catalyst formed catalyst system that combines.In addition, the aluminium silicone derivative does not have alkylaluminium cpd active, thereby than being easier to operation.Compare with aluminium alkoxide compound, the polymerisate that it drew has the narrower advantage of molecular weight distribution.
The present invention is the method for the transition metal component of the polymerization catalyst system of a kind of alkene of preparation, this method is to be reacted with a kind of organoaluminum-silicon compound by the compound of the alkoxyl group of haloalkane or magnesium in a kind of liquid phase medium, form a kind of organic-magnesium-aluminium-pasc reaction product, make this reaction product carry out chlorination then, and handled by a kind of transistion metal compound that is selected from titanium, vanadium, zirconium and the chromium, be it is characterized in that it being a kind of aluminium silicone derivative at least with following general formula:
R wherein
1, R
2, R
3, R
4And R
5Can be identical also can be different, represent a kind of C
1To C
12Alkyl, C preferably
1To C
6Alkyl or hydrogen atom, but the derivative of each mole can not have the above hydrogen of three atoms; Or chlorine, but preferably each mole derivative can not have chlorine more than three moles.
The compound of the magnesium that reacts with the aluminium silicone compounds meets chemical formula YaMg
mX
b, Y is-C in the formula
1To C
12, and preferably-C
1To C
8Alkyl or the group of alkoxyl group, X represents a kind of Y group or a halogen atom, and chlorine atom preferably, m is equal to or greater than 1 number, a and b are equal to or greater than zero number, and a+b=2m.
The example of this compounds mainly contains the muriate of magnesium ethide, the muriate of dibutyl magnesium, di-n-butyl magnesium, diisobutyl magnesium, di-n-hexyl magnesium, di-n-octyl magnesium and (C
4H
9)
3Mg
2(C
2H
5).
Chemical formula is YaMg
mX
bThe compound of magnesium is that these reagent are being in the inert liquid medium with the reaction of aluminium silicone derivative, if or one of this two reagent be liquid, also can in inert liquid medium, carry out.This inert media mainly is a kind of aliphatic hydrocarbon polymer, as pentane, heptane or hexane; Or a kind of aromatic hydrocarbons, as benzene,toluene,xylene; Or a kind of alicyclic compound, as hexanaphthene, or methylcyclohexane.The temperature of this reaction is not strict, for example can be from-40 ℃ until employed liquid phase medium boiling temperature under atmospheric pressure.The YaMg that both react to each other in reaction medium
mX
bThe compound of the magnesium of chemical formula is with the ratio of aluminium silicone derivative, with the ratio of the mole number of the mole number of magnesium compound and aluminium silicone compounds in 0.1 to 100 scope, and between being preferably in 0.5 to 20 for favourable.
According to the present invention, by YaMg
mX
bCompound is with organic-magnesium-aluminium-silicon product that aluminium silicone derivative reaction is generated, and stands chlorization immediately and by the processing of the transistion metal compound that is selected from titanium, vanadium, zirconium and chromium.
Carry out chlorination and by the processing of transistion metal compound, its precedence is strict regulation not.For example can allow the organic-magnesium-aluminium-pasc reaction product that is generated stand chlorination earlier, and then the formed product of chlorination handled by transistion metal compound, also can be conversely, that is to say to allow organic-magnesium-aluminium-silicon product be handled earlier, and then allow the product that forms carry out chlorination by transistion metal compound.
Chlorating carries out, and can make to treat that the direct same chlorizating agent contact of chlorating product forms; But in order to obtain satisfied homogeneity, chlorination reaction is carried out in an inert liquid phase medium, used that was a kind of similar when this liquid phase medium can be with preparation organic-magnesium-aluminium-pasc reaction product, and the temperature that chlorination is adopted is not strict, for example can carry out between 0 ℃ to 100 ℃.As chlorizating agent, suitable chlorine, the SOCl of mainly containing
2, SiCl
4, and preferably anhydrous HCl.The consumption of chlorizating agent is that the same YaMg that reacts with the aluminium silicone derivative of the amount of chlorine atom that is provided by chlorizating agent is provided
mX
bThe ratio of magnesium atom number is greater than 2 in the compound, especially in 2 to 100 scopes.
Handle to organic-magnesium-aluminium-silicon product or to the formed corresponding product of chlorination by transistion metal compound, be carrying out to favourable in an inert liquid phase medium too, this inert liquid medium is especially for chlorination the time or prepare organic-magnesium-aluminium-silicon compound the adopter of time institute is similar.The temperature of this processing can change in very big scope, especially between-30 ℃ to 200 ℃, and preferably between 0 ℃ to 150 ℃.The compound of the titanium that this processing was suitable for, vanadium, zirconium and chromium preferably is selected from Ti Cl
4, Ti Cl
3, VCl
4, VOCl
3, Cr Cl
3, Cr O
3, vanadium acetylacetonate, chromium acetylacetonate, Ti(OR)
PCl(4-p) and Zr(OR)
PCl(4-p), wherein R represents C
1To C
8Alkyl group, and p is 1 to 4 integer.At the muriate of selecting titanium, vanadium, zirconium and chromium for use, especially TiCl
4When making chlorizating agent, might make chlorination and only need to finish once going on foot by the processing of transistion metal compound.
According to a kind of special embodiment of the inventive method, the preparation of transition metal component can realize having on a kind of inorganic or organic porous carrier.Select in the class that inorganic porous carrier can be made up of following each oxide compound: as Si O
2, Al
2O
3, Ti O
2, Zr O
2, zeolite and contain Si O
2Mixed oxide and one or more be selected from Zr O
2, Ti O
2, Mg O and Al
2O
3Metal oxide.
Pulverous organic porous polymer support, can in powders of thermoplastic polymers, choose with suitable particle size and porosity, these polymkeric substance are preferably without the reactive group that can be easily reacts with the compound and/or the transistion metal compound of magnesium, perhaps can cause crosslinked action and make the performance person of suffering damage of carrier.
Better polymerization thing carrier is by the powder constituent of thermoplastic polymer such as polystyrene, polyolefins especially, and as high density polyethylene(HDPE), free fundamental mode new LDPE (film grade), polypropylene, ethene and one or more C
3To C
12The multipolymer of alpha-olefin better.
Carrier can be blended in the reaction product of compound with the aluminium silicone derivative of magnesium, this fusion or during reaction medium, carry out all can when perhaps the reaction that generates at organic-magnesium-aluminium-silicon finishes at this compound in reaction process.Handling by YaMg with transistion metal compound
mX
bThe compound of magnesium with the aluminium silicone derivative react formed organic-magnesium-aluminium-silicon product and then carry out under the chlorating situation, carrier can be before chloride process, by transistion metal compound handle organic-magnesium-aluminium-silicon and medium in mix.On the contrary, if organic-magnesium-aluminium-silicon product is carried out chlorination earlier, the product that this chlorination reaction is formed is handled by transistion metal compound then, then formed product after the chlorination can be dissolved in the inert solvent, for example tetrahydrofuran (THF) or methyl alcohol.And utilize the solution that is obtained to come impregnated carrier, and then handle impregnated carrier with transistion metal compound.Also carrier can be ground in a kind of inert liq or be mixed into a suspensoid, be incorporated in behind the chlorinating step and handle by transistion metal compound after the product that last process obtained in.At last, also the product that this final step obtained can be dissolved in the inert solvent, especially tetrahydrofuran (THF) or alcohol utilize the solution impregnating carrier of this acquisition again as in the methyl alcohol.
The electron donor of being made up of lewis base or the compound of electron acceptor can be combined in the transition metal component too.This is directly realized by mixed in conjunction with finishing the back in this component of preparation.Also can mix electron donor or electron acceptor, especially at YaMg in the arbitrary moment that obtains the transition metal component process
mX
bMix in the process of the compound of magnesium with aluminium silicone derivative step of reaction, perhaps after this stage finishes, mix, perhaps in the end mixed before the stage.Promptly according to particular case, or at chlorination stage, or in the stage of handling, and or mix in the stage that adds carrier with transistion metal compound.
Electron donor can be compound simple function or polyfunctional, from following select all kinds of comparatively favourable: i.e. aliphatics or aromatic carboxylic acid, and their alkyl ester; Aliphatics or cyclic ethers class; Ketone; Vinyl ester; Acrylic acid derivative, especially acrylate, or alkyl methacrylate and silane.Especially the compound that is suitable for doing electron donor has: to a toluic acid ester, ethyl benzoate, vinyl acetic monomer, or N-BUTYL ACETATE, ether, right-ethyl anisate, dibutyl phthalate, dioctyl phthalate (DOP), diisobutyl phthalate, tetrahydrofuran (THF), diox, acetone, methyl iso-butyl ketone (MIBK), vinyl acetate, methyl methacrylate and phenyl triethoxysilane.
Electron acceptor is a kind of lewis acid, preferably is selected from aluminum chloride, boron trifluoride, chloranil, perhaps aluminum alkyls class and alkyl magnesium compounds.
When the preparation transition metal component, the consumption of every kind of transistion metal compound is to make the transition metal that contains 0.01% to 40% weight ratio in this transition metal composition, and preferably contains 0.1% to 20%.
When adopting carrier, consumption is 5% to 99.5% of its contained transition metal composition weight.Preferably 40% to 85%.
Sometimes the consumption of the electron donor of Chu Xianing can change in very on a large scale.The magnesium atom number of transition metal composition can be included in the ratio of the molecule number of electron donor in 0.5 to 200 the scope, preferably is favourable between 1 to 100.
Sometimes the consumption of the electron acceptor of Jia Ruing also can change in sizable scope.Electron acceptor can be included in 0.01 to 200 scope with the molar ratio of transition metal component magnesium, preferably is favourable between 0.1 to 50.
The transition metal component of pointing out previously for preparing can combine with a kind of co-catalyst that is selected from the organometallic compound that is formed by I in the periodic table of elements to the metal in the III family, to form a catalyst system that is suitable for the polymerization of olefines reaction.
Be incorporated into the co-catalyst of transition metal component, especially can be selected from following chemical formula is YaMg
mX
bOrgano-magnesium compound, prenyl aluminium (isoprenyl alumineum), alumina alkane, aluminium silicone derivative and the chemical formula that the front limited be Al(R ')
qM
rH
sOrgano-aluminium compound, wherein M represents Cl or OR '; R ' represents C
1To C
16, C preferably
1To C
12Alkyl; And q, r, s are numerals, 1≤q≤3,0≤r≤2 and 0≤S≤2 are arranged, and make q+r+s=3.Co-catalyst preferably is selected from: prenyl aluminium, chemical formula are YaMg
mX
bOrgano-magnesium compound and chemical formula be Al " ' R
xCl(3-x) organo-aluminium compound, wherein R " ' represent C
1To C
8Alkyl, x is a numeral, and 1≤x≤3 are arranged.The example of this compounds has: triethyl aluminum, triisopropylaluminiuand, triisobutyl aluminium, tri-n-hexyl aluminum, tri-n-octylaluminium, diethyl aluminum muriate, prenyl aluminium, dibutylmagnesium, di-n-hexyl magnesium.
Co-catalyst in conjunction with the usage ratio of transition metal component is, the atomicity that is contained in the I in the periodic table of elements in the co-catalyst-III family metal is to be in 0.5 to 1000 scope with the ratio of the atomicity of the transition metal in this component, preferably is between 1 to 400.
Catalyst system can be pre-formed with the co-catalyst contact by making transition metal component with before treating the contact of polymeric alkene.Also can form catalyst system on the spot by respectively transition metal component and co-catalyst being added in the polymerization zone of alkene.
No matter transition metal component contains and does not contain a kind of electron donor, all the such a kind of compound that is selected from the electron donor that limits previously can be added in the catalyst system, this catalyst system is combined with transition metal component by co-catalyst and forms; Perhaps also the compound of electron donor can be added to co-catalyst contacts with transition metal component with in the co-catalyst before the formation catalyst system; Electron donor is contacted with other two kinds of constituents of catalyst system simultaneously.The consumption of electron donor, to be contained in the periodic table of elements in the co-catalyst I to the metal of III family, especially the atomicity of aluminium or magnesium is in the ratio of electron donor molecule number in 1 to 50 the scope for favourable in the co-catalyst.
Utilization is by the same co-catalyst of transition metal component of the present invention, also has a kind of electron donor that limits previously to combine sometimes and the catalyst system that forms, comes polymerization or copolymerization alkene, and suitable alkene not only comprises the C with single unsaturated ethylene thiazolinyl
2To C
18Hydrocarbon polymer, and especially comprise C
2To C
18Monoolefine, as ethene, propylene, 1-butylene, 1-amylene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, dodecylene, 1-tridecylene, cetene, 1-vaccenic acid; In addition, also comprise conjugated or not conjugated dienes, especially divinyl, isoprene, 1,4-hexadiene, 1,5-hexadiene, vinyl norbornene, ethylidene norbornene.
Aforesaid catalyst system is specially adapted to C
2To C
12The polyreaction of monoolefine is as ethene, propylene, 1-butylene and 1-hexene.
Especially available single C
2To C
12Monoolefine, as ethene, propylene, 1-butylene, 1-hexene with the catalyst system polymerization that contacts, to produce and the corresponding homopolymer of this monoolefine.
Also can use at least two kinds of C
2To C
12Alkene mixture carry out polymerization with the contact of this catalyst system so that produce the multipolymer of above-mentioned olefines.For example can make ethene and one or more C
3To C
12The mixture of alpha-olefin carry out polymerization, this mixture when they contact with catalyst system, C
3To C
12The integral molar quantity of alpha-olefin in 0.1% to 90% scope, be preferably between 1% to 60%.
Also can the same ethene of polypropylene, and/or one or more C
4To C
12The alpha-olefin mixture, this mixture when they contact with catalyst system, ethene and/or C
4To C
12The integral molar quantity of alpha-olefin in 0.1% to 90% scope, be preferably between 1% to 60%.
Also can make the polymerization of mixtures of the ethene and the propylene that contain or do not contain other alpha-olefins or diolefine, at this moment ethene, is preferably between 0.05 to 1 between 0.02 to 50 with the molar ratio of propylene.
The above-mentioned olefinic polyreaction of pointing out, especially C
2To C
12Monoolefine, utilize the catalyst system that limits previously, can be by individually above-indicated or mix ground, in an inert liquid medium, especially in aliphatic hydro carbons as normal heptane, normal hexane, Trimethylmethane, realization solution polymerization or suspension polymerization; Perhaps having at least a kind of polymeric alkene for the treatment of to remain on liquid state or cross under the criticality realization mass polymerization.
For this liquid-like phase polyreaction, its operational condition, especially temperature, pressure, the consumption of catalyst system etc., the Ziegler-Natta type band carrier under the similar situation that all coexists or not with general the suggestion roughly the same of catalyst system commonly used of carrier.
For example do solution or suspension polymerization to a kind of in inert liquid medium, its service temperature can be up to 250 ℃, and pressure can be from normal atmosphere until 250 bar pressures.For the polyreaction in the propylene liquid medium, temperature can be up to 250 ℃, and pressure can carry out between normal atmosphere to 50 bar pressure.Mass polymerization for ethene becomes polyethylene, the perhaps multipolymer that is in the great majority of copolymerization synthesizing ethylene, and its service temperature can reach 350 ℃, and pressure can be in the scopes of 200 to 3500 crust.
By transition metal component of the present invention with a kind of co-catalyst and also have sometimes a kind of above-mentioned electron donor of limiting in conjunction with and the catalyst system obtained also can be used for the gas phase polymerization of above-mentioned olefines of pointing out or alkene mixture.Especially can make ethene with one or more C
3To C
12Alpha-olefin, as propylene, 1-butylene, the 1-hexene, 1, the mixture of 4-methyl-1-pentene and 1-octene contacts with this catalyst system and carries out gas phase polymerization; Contain a small amount of C in order to produce
3To C
12The ethylene/alpha-olefin copolymer of alpha-olefin promptly is called low density linear polyethylene person, when alkene contacts with catalyst system, and alpha-olefin or C
3To C
12Its contained molar weight of alpha-olefin be in 0.1 to 90% scope, preferably between 1 to 60%.
The gas phase polymerization that alkene or olefines contact with catalyst system can carry out in the various reactors that can carry out gas phase polymerization.Especially can carry out in agitated bed reactor or in the fluidized-bed reactor.Realize the condition of gas phase polymerization, particularly temperature, pressure, alkene or olefines sprays in the agitated bed reactor or in the fluidized-bed reactor, the temperature and pressure of telo merization etc. are all similar with the technology condition that prior art is advised the gas phase polymerization of olefines.Service temperature generally is taken at below the fusing point (m.p.) of institute's synthetic polymkeric substance or multipolymer, especially be taken at-20 ℃ to the scope of (m.p.-5) ℃, and the pressure of being got is to make the alkene or the olefines that appear in the reactor, also have other to be present in the monomer of the hydrocarbon in the reactor sometimes, is the state that is in vapour phase.
For the polymkeric substance of regulating production or the melt index of multipolymer, can especially carry out solvent, suspension, bulk polymerization or gas phase polymerization when hydrogen or alkyl zinc such as zinc ethyl existing a kind of chain-transfer agent.Move the chain agent and preferably use hydrogen, its consumption can be the olefines that imports in the reactor and below 80% of cumulative volume of hydrogen, preferably between 0.1 to 40%.
Transition metal component of the present invention also can be used as the active hydrocarbonaceous solid transition metal component of preparation, is used for the polyreaction of the olefines that limited as the french application patent No. 8303229.
Transition metal component of the present invention also can be used for preparing a kind of active prepolymer, and it can use or be selected from together chemical formula YaMg separately
mX
bThe compound of magnesium, prenyl aluminium, the aluminium silicone derivative that chemical formula limited of aluminium type siloxane and front, and by chemical formula Al(R ')
qM
rH
sA kind of co-catalyst of the organo-aluminium compound that shows combines, for use in forming the catalyst system that carries out mass polymerization or copolymerization for ethene, so as to obtaining Natene, perhaps contain the multipolymer of a large amount of ethene, as ethene and one or more C
3To C
12The multipolymer of alpha-olefin, promptly be called low-density linear polyethylene; The service temperature of this polyreaction can be up to 350 ℃, and pressure can be operated and be preferably in 800 to the 2500 crust scopes in the scope of 200 to 3500 crust.
Above-mentioned active prepolymer is by one or more C
4To C
12Alpha-olefin, with above-mentionedly being used for this purpose and contacting and obtain with a kind of being selected from by the combine catalyst system that forms of the co-catalyst of previous pointed usage ratio use by transition metal component of the present invention; This alkene or C
4To C
12The consumption of olefines is with 2 to 100 moles, preferably 2 to 50 moles of alkene or C by every grammeatom transition metal in the transition metal component
4To C
12Olefines.
The present invention is illustrated by the following example, but is not limited.
Embodiment 1
A. the preparation of transition metal component
In one liter of reactor of whipping appts and double-jacket is housed, operate, with heat transfer fluid in chuck to keep specific temperature of reaction.
In the reactor that purifies with circulating nitrogen gas, add 35 milliliters (C
4H
9)
3Mg
2-(C
2H
5) (heptane is a solvent to (DBME) solution, 25mM) and 25mM diethyl aluminum-dimethyl ethyl siloxanes.Gained solution 80 ℃ and stir under kept 4 hours, be cooled to room temperature, add 1 gram dioctyl phthalate (DOP), stirred simultaneously 18 hours.
Anhydrous hydrogen chloride to carry out one hour in the continuous injecting reactor content of 0.5 mole/hour speed, is made this solution chlorination.The gained throw out separates with filtration method, and is reentered into and is suspension in the heptane.Add 10 milliliters of pure Ti Cl
4To gained suspension, kept reaction medium 3 hours in room temperature with under stirring then.Take out reactor content, filtration, and use nitrogen gas stream 70 ℃ of dryings the solid composition of collecting.
The gained solid promptly is a transition metal component of the present invention, contains 10%Mg, 0.4%Ti and 0.9%Si(weight).
B. the ethene suspension polymerization that contacts with catalyst system that transition metal component makes.
In the reactor that revolving stirrer (per minute 350 changes) is housed, operate.Above-mentioned reactor remains on 80 ℃ during entire reaction.
In stirred reactor, after drying and the nitrogen purge, add 2 liters of dry heptane successively, the component of 6 mmole triethyl aluminums (co-catalyst) and 100 milligrams of titaniums.So in reactor, be pressed into the hydrogen of 5.4 crust and the ethene of 5.4 crust, then by injecting additional ethene to keep reactor internal pressure.React after one hour, allow the reactor decompression that reaction is stopped; Then add in the reactor content with 20 milliliters methyl alcohol and the mixture of HCl (HCl is 10% weight).Reaction medium is filtered, collect the polyethylene that generates.
In polyreaction, the influence of catalyzer is summarised in the table I behind the embodiment 3.
Embodiment 2
Repeat above-mentioned example 1, but dioctyl phthalate (DOP) replaces with 1 gram chloranil.
The gained solid contains 10.2%Mg, 0.54%Ti and 0.9%Si(weight).
The polymerization of propylene is undertaken by the condition of embodiment 1 fully.The influence of catalyzer in polyreaction is summarised in the table I behind the embodiment 3.
Embodiment 3
In being housed, operates one liter of reactor of whipping appts and double-jacket, with heat transfer fluid temperature with the maintenance reactor in chuck.
In the reactor that purifies with circulating nitrogen gas, add 35 milliliters DBME solution (heptane is solvent 25mM) and 25mM diethyl aluminum-dimethyl ethyl siloxanes.Gained solution stirred 4 hours at 80 ℃.After being cooled to room temperature, anhydrous hydrogen chloride to carry out one hour in the continuous injecting reactor content of 0.5 mole/hour speed, is made this solution chlorination.The gained throw out separates with filtration method, and is reentered into and is suspension in the heptane.Add 10 milliliters of pure Ti Cl
4To gained suspension, kept reaction medium 3 hours in room temperature with under stirring then.Reactor content is filtered then, cleans with heptane.Solid uses nitrogen gas stream 70 ℃ of dryings after filtering once more.The gained solid is a transition metal component, contains 17.2%Mg, 2.7%Si and 0.6%Ti(weight).
Under the condition of embodiment 1, carry out the polyreaction of ethene.The influence of catalyzer in polyreaction is summarised in the table I.
The table I
Active melt flow is than (MFR) density
Embodiment 13, and 000 33 0.960
Embodiment 24, and 500 32 0.954
Embodiment 37, and 500 29 0.958
Active: every gram titanium component is per hour produced the gram number of polymkeric substance.
MFR(melt flow ratio) melt index ratio MI
21.6 190 ℃With MI
2.16 190 ℃The ratio.
Melt index MI: according to ASTM 1238 standard test melt indexs.
Embodiment 4
A. the preparation of the transition metal component on polymer support.
In 1.5 liters of reactors of whipping appts and double-jacket are housed, operate, with heat-carrying follow fluid in chuck to keep temperature of reactor.
Under dry reactor and maintenance nitrogen pressure, add the linear low density of polyethylene dried powders of 50 grams with the nitrogen degassing.The median size of this powder is 230 microns, and volume of voids is 0.2 centimetre
3/ gram.
Under keep stirring, in 40 ℃ with 25mM
(in 10 milliliters of n-heptane solutions)
Add in the reactor content.
After homogenization in 1/4 hour, powdered contents in the reactor is purged to remove heptane with nitrogen.Add 5.5mM dibutylmagnesium (in 8 milliliters of hexane solutions) then.After homogenization in 1/4 hour, reactor content is purged to remove hexane with nitrogen.In reactor, add 1mM metatitanic acid four (just)-propyl ester (in 10 milliliters of n-heptane solutions).After homogenization in 1/4 hour, powdered contents in the reactor is purged to remove heptane with nitrogen.In reactor, add 0.1MSi Cl
4, and keep and stirred 1 hour.
With adding 100 milliliters of heptane, following filtering method and clean.
With reactor cooling to room temperature, and under whipped state according to 0.6 mole/hour speed, injected anhydrous hydrogen chloride 60 minutes, make mixture carry out chlorination.Unreacted hydrogen chloride purges with nitrogen and removes.
At last, in reactor, add 75mM three (the just)-hexyl aluminium that is dissolved in 6 milliliters of heptane down in stirring.After homogenization in 1/4 hour, with nitrogen purge content to remove heptane.
So obtain the pulverulence product of transition metal component, this product has the granularity of original polymer support powder, and contains 725ppmTi, 2520ppmMg, 1830ppmAl and 690ppmSi(weight).
B. polyreaction
The preparation sample of the multipolymer of ethene/1-butylene is finished in the presence of gas phase, catalyst system.
Copolymerization carries out in 8 liters of stirred reactors, includes polyethylene 100 grams of the degassing, nitrogen purification.
Under 85 ℃ of stirrings, add successively:
1-butylene absolute pressure 2 crust
1 milliliter in pure three hexyl aluminium (THA)
Hydrogen absolute pressure 1.5 crust
Ethene 13.5 crust
Under agitation with absolute pressure be 4 the crust nitrogen make stagnation pressure reach absolute pressure be 21 the crust catalyzer is added in the reactor.Reaction begins immediately, with 1-butylene/mixture of ethylene supply response device of 0.0466M to keep pressure-stabilisation.
C. operational condition
Catalyst levels, gram 5
Add polyethylene quantity in the reactor, gram 100
Inject co-catalyst (pure THA), milliliter 1
Polymerization reaction time, hours 4
D. polymerization results
Copolymer output, gram 771
Productivity, gram polyethylene/gram catalyzer 154
Productivity, gram polyethylene/gram titanium 211,000
The non-apparent density that compresses, gram per centimeter
30.30
During 50% accumulative total partition curve
Particle diameter (DP50), micron 1,130
Melt index MI
21.4
MFR＝ (MI 21.6)/(MI 2.16) 28.2
Density 0.922
Ethyl branch number 18.1 to 1000 carbon
（C
2H
5/1000C）
Claims (4)
1, by a kind of transition metal component be selected from periodic table of elements I to a kind of co-catalyst of the organometallic compound of III family metal and may combine with a kind of electron donor and the catalytic systems for polymerization of olefins formed, it is characterized in that employed transition metal component makes as follows:
With a kind of halogenide of magnesium, alkylide or alcoxylates and at least a organic aluminide reaction form organic magnalium reaction product in liquid medium; Make reaction product carry out chlorination then, and handle to form this transition metal component, wherein be at least a kind of aluminium silicone derivative of following form as organic aluminide with the transistion metal compound that is selected from Ti, V, Zr and Cr:
R wherein
1, R
2, R
3, R
4And R
5Represent identical or different C
1To C
12Alkyl.
2, according to the catalyst system of claim 1, it is characterized in that transition metal component and co-catalyst are combining under the ratio like this: be in 0.5 to 1000 scope, particularly between 1 to 400 with the ratio that is included in the transition metal atoms number in this component from the periodic table of elements I of co-catalyst atoms metal number to III family.
3,, it is characterized in that co-catalyst is selected from prenyl aluminium according to the catalyst system of claim 2; Aikyiaiurnirsoxan beta; Molecular formula is YaMg
mX
bOrgano-magnesium compound, wherein Y represents C
1To C
12, C preferably
1To C
8Alkyl or alkoxyl group; X represents Y group or halogen atom, chlorine atom preferably, and m is equal to or greater than 1 number; And a and b are equal to or greater than 0, such as a+b=2m; Molecular formula is Al R
" ' xCl(3-x) organo-aluminium compound, the " ' expression C of R in the formula
1To C
8Alkyl, the number of x is 1≤x≤3; And molecular formula is
R wherein
1, R
2, R
3, R
4And R
5Definition the same.
4, according to the catalyst system of claim 3, it is characterized in that it forms with a kind of active prepolymer, the latter is by one or more C
4To C
12Alpha-olefin contact with catalyst system and obtain; This catalyst system is then combined and is got by the above-mentioned co-catalyst of transition metal component and one or more, and is present in 2 to 100 moles of every grammeatom transition metal in the transition metal component, is preferably certain C of 2 to 50 moles
4To C
12Alpha-olefin or multiple alkene, or catalyst system be by above-mentioned active prepolymer at least with above-mentioned a kind of co-catalyst be combined into.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8508908A FR2583421B1 (en) | 1985-06-12 | 1985-06-12 | PROCESS FOR THE PREPARATION OF A TRANSITIONAL METAL COMPONENT FOR A CATALYTIC SYSTEM FOR OLEFIN POLYMERIZATION |
| FR8508908 | 1985-06-12 | ||
| CN86103356A CN1009097B (en) | 1985-06-12 | 1986-05-17 | Prepn. transition metal composition of catalyst system for alkene polymerization |
Related Parent Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86103356 Division | 1986-05-17 | ||
| CN86103356A Division CN1009097B (en) | 1985-06-12 | 1986-05-17 | Prepn. transition metal composition of catalyst system for alkene polymerization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1041952A true CN1041952A (en) | 1990-05-09 |
| CN1013372B CN1013372B (en) | 1991-07-31 |
Family
ID=25742212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89108996 Expired CN1013372B (en) | 1985-06-12 | 1986-05-17 | Olefin polymerization catalyst system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013372B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098286C (en) * | 1997-04-30 | 2003-01-08 | 中国石油化工总公司 | Catalyst for polymerization or copolymerization of ethylene and its preparation |
-
1986
- 1986-05-17 CN CN 89108996 patent/CN1013372B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098286C (en) * | 1997-04-30 | 2003-01-08 | 中国石油化工总公司 | Catalyst for polymerization or copolymerization of ethylene and its preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1013372B (en) | 1991-07-31 |
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