CN1036460C - Catalytic component containing novel magnesium chloride particles - Google Patents

Abstract

Porous particles of MgCl2 which, under the microscope, take the form of substantially regular six- or eight-faced polyhedra. These particles, impregnated with transition metal compound, are used as a catalyst component in olefin polymerisation.

Description

The catalyst component that contains magnesium chloride particles

The present invention relates to new preferably anhydrous magnesium chloride (MgCl ₂) particulate and manufacture method thereof.This class MgCl ₂Particulate useful as catalysts carrier is particularly useful for doing the Ziegler-natta catalyst component.This class is used for the form that polymerization of olefines catalyst for reaction component can keep carrier.They equally also are parts of the present invention.

MgCl of the present invention ₂Constitute by small porous particle, be the polyhedron-shaped of six of primitive rule or octahedral at microscopically, wherein symmetric relatively in twos each face is substantially parallel, and constitute one polyhedral above and the big face of following two prolongations, diagonal lines (D) the longest in each face is greater than the minor increment (d) of separating two relative edges, two big faces by constitute each limit of described polyhedron basic for other each faces of orthogonal substantially vertically round, the length (c) of described basic minor face for each face of rectangle is less than the minor increment (d) that separately respectively prolongs big face two relative edges.

Symmetric relatively in twos each face is parallel substantially on the polyhedron, and described each face can think basic identical on geometrical shape.

Polyhedral two long-diagonals (D) that prolong on each of big faces are generally 10 to 100 microns long.Separately these two minor increments (d) that prolong the relative both sides of big face are generally 4 to 40 microns.The length (e) that constitutes the minor face of polyhedral other each face (also can be thought MgCl ₂The thickness of particulate) be generally 2 to 20 microns.The array mode of these sizes of particulate is observed polyhedral definition certainly, and therefore, preferably the ratio of D/d is 2 to 7, and the ratio of d/e is 1 to 3.

Fig. 1 is MgCl of the present invention ₂The skeleton view of particulate;

Fig. 2 is MgCl of the present invention ₂The skeleton view of a kind of alternate embodiment of particulate:

Fig. 3 is octahedra shape MgCl of the present invention ₂The Photomicrograph of particulate;

Fig. 4 is hexahedral shape MgCl of the present invention ₂The Photomicrograph of particulate;

Fig. 5 is one group of MgCl of the present invention ₂The Photomicrograph of particulate;

Fig. 6 has carried out one group of MgCl that hyperplasia is handled by the present invention ₂The Photomicrograph of particulate;

Fig. 7 is the Photomicrograph of one group of catalyst component particulate of the present invention.

This class MgCl₂Generally there is the particle number more than 90% to be consisted of by the hexahedron that limits and octahedra mixture. The percentage that but can not get rid of the particulate that does not meet this definition is because polyhedral surface layer of more or less losing in the process of processing is remaining, perhaps because the result of the agglomeration of particulate of the present invention.

This class MgCl₂The porosity of particulate is little, can be 0.1 to 1 centimetre³/ gram, 0.2 to 0.8 centimetre³/ gram better. Their specific area is generally 0.5 to 10 meter²/ gram, 1 to 3 meter²/ gram better.

MgCl ₂The mean size of particulate (measuring with the MALVERN method) for narrow particle size distribution, is generally 10 to 100 microns. Usually, the particle size distribution width that represents with D90/D10 is less than 15, usually less than 10. D90 is that 90% mean particle dia is lower than this value, and D10 is that 10% mean particle dia is lower than this value.

MgCl ₂The method for making of particulate is: make best anhydrous MgCl ₂Be suspended in their ligand solvent same MgCl of solvent ₂Mol ratio less than these two kinds of solubility of substances ratios under the suspension temperature.According to this method, MgCl ₂Must remain on MgCl ₂Be suspended state in the saturated ligand solvent.Under these conditions, the suggestion medium will remain under the two-phase state, and contains the ligand solvent of q.s, so that keep MgCl ₂Be suspended state.

Ligand solvent is meant all compounds of lewis base property, though they in the presence of excessive described solvent, even in neat solvent, also can same MgCl ₂Formation has clear and definite and stable stoichiometric coordination compound.

Be specially adapted to make as the defined MgCl in front ₂In all kinds of SOLVENTS of particulate, preferred tetrahydrofuran (THF).

Under the operational condition of being advised, the formation of suspension is carried out in the conventional mode, preferably under agitation promptly, makes anhydrous MgCl ₂Perhaps water content is preferably less than the technical grade MgCl of 53% any structure ₂Contact with ligand solvent.MgCl ₂Keep the time enough that suspends, i.e. a few hours are so that particulate can be engaged the abundant swelling of solvent.In order to obtain optimal results, suggestion is controlled at service temperature between (Teb-30 ℃) to (Teb+40 ℃) in the process of implementing present method, and Teb is a ligand solvent boiling point under atmospheric pressure.This processing can make primary MgCl ₂Particulate obtains resetting.

The most tangible phenomenon that is taken place in the particle rearrangement process is original MgCl ₂Fine particle and macrobead disappear, and occur as the narrow special shape particulate of the defined particle size dispersion in front.

This particle is reset operation in case finish, with the MgCl that suspends ₂Particulate and MgCl ₂Saturated solvent separates, and may for example adopt a kind of hydrocarbon to be washed, and may adopt heating power dry or employing vacuum method or chemical process processing, so that remove all or part of ligand solvent.

In order to obtain large-sized particulate, suggestion handles it after particle rearrangement again through a kind of hyperplasia.This hyperplasia is handled and is comprised: at MgCl ₂Be in the particulate media of suspension the MgCl in the ligand solvent that one side adds and original medium is identical or different in the saturated solvent ₂Solution, adding on the other hand can be miscible but be MgCl with solvent phase ₂The inert liq of non-solvent, stable hydrocarbon for example, and adding simultaneously basically.This adding promptly, makes the MgCl in ligand solvent as being undertaken then can obtaining optimum by following mode ₂The flow of solution is a constant with the ratio of inert liq flow.This ratio is generally between 20 and 0.2, between preferred 10 to 0.5.

Reduce MgCl if necessary ₂Solubleness in original medium can be at MgCl ₂Suspension MgCl in the saturated solvent ₂In the medium of particulate, add MgCl substantially simultaneously ₂Before saturated solution and the inert liq, adding a kind of is not MgCl ₂Solvent and can same MgCl ₂The miscible inert liq of ligand solvent.

Operation generally is to carry out between room temperature and 80 ℃.Be added to the MgCl in the medium ₂The volume of solution has determined the final size of particulate, because the MgCl that adds ₂On the primary particle of solution crystallization in medium, thereby increase its size and do not change its form.

The MgCl that is recovered to ₂MgCl for coordination mode ₂NX, wherein X is engaged in MgCl ₂On solvent.Numerical value " n " is represented X/MgCl ₂Mol ratio, when solvent all from MgCl ₂On when removing, its value must be zero.General this numerical value n changes between 0 to 3.For example adopting under the particular case of tetrahydrofuran (THF) as ligand solvent, " n " value of recommendation is to be equal to or less than 2.5, and after the title complex drying, this value is equal to or less than 1.5.

This is the coordination MgCl of ligand solvent formation roughly the same ₂, can be used in the Ziegler one Natta catalyst component, as the carrier of transition metal.

Just realize MgCl ₂Suspension, ligand solvent means not only can only adopt a kind of ligand solvent, and can adopt the mixture of multiple this compounds.For example can add a kind of in ligand solvent is inert, mixable compound for ligand solvent, for example saturated or undersaturated, as to contain 6 to 30 carbon atoms wire or ring-type hydro carbons, for example normal heptane, hexanaphthene, toluene, benzene or derivatives thereof such as durene or dimethylbenzene, also can add and contain one or more heteroatomic compounds, for example ethers, ester class, amine, silicane.

Through X-ray procedure, with MgCl ₂For the molecular compound on basis is a kind of crystallized product.

Specifically, MgCl ₂.1.5THF the X-ray diffraction spectrum of (tetrahydrofuran (THF)) presents following main diffraction ray:

20 position relative intensities

9.25 59.9

9.50 100.00

16.96 15.5

20.27 29.2

22.45 23.76

24.45 15.77

25.27 24.98

32.19 36.57

32.34 19.02

38.77 18.99

39.77 18.53

Characterizing the width of half peak value of crystallite size, is 0.169 ± 0.006 for 9.25 wave beams, is 1.21 ± 0.003 for 9.50 wave beams.

Measurement utilizes an INEL CPS-160 instrument to carry out, and voltage is 40 kilovolts, and electric current is 35 milliamperes, utilizes the anticathode K alpha-ray of copper, and is calibrated with silicon.The INEL spectrum is calculated by the PROLIX computer program, and refining according to the PEARSONVII curve.

The MgCl that is obtained ₂Because its primary formation is with globular MgCl ₂Identical advantage is arranged, and reduced its shortcoming.For the MgCl that obtains to measure according to ASTM standard D1895 method ₂Excellent fluidity, especially when it will obtain the excellent fluidity of final polymkeric substance or multipolymer the time, once studied MgCl as support of the catalyst ₂Special construction.Under catalytic situation, globular MgCl ₂Desirable especially, so that the final particle of polymkeric substance or multipolymer can be with this fluidity quality that particulate was had of expression vector substantially again of mode like the position.This globular shortcoming is to store static charge in the reactor and in the pipeline easily, can cause powder adherence especially on wall.MgCl of the present invention ₂Structure can alleviate this class shortcoming.

The catalyst component of Ziegler-natta catalyst basically can be by MgCl of the present invention ₂Combine with a kind of transistion metal compound and obtain.Therefore, this component can be by at MgCl ₂The compound of last deposit titanium, vanadium, zirconium and/or hafnium and obtaining, this compound is halogenide preferably, especially TiCl ₄, TiCl ₃, TiCl _n(OR) _4-n(wherein 0≤n≤3, R represents the saturated hydrocarbyl of 1 to 12 carbon atom), VCl ₃, VCl ₄, or VOCl ₃, HfCl ₄, or ZrCl ₄This catalyst component combines with a kind of organometallic compound that is selected from periodic table of elements mat woven of fine bamboo strips I to the III family metal especially promotor of aluminum compound, can be used as ethene, propylene, 1-butylene, 1-hexene, 1-octene, 4-methyl-1-pentene, 1,3-divinyl, 1, the polymerization of straight or branched olefines such as 9-decadiene or the catalyzer of copolymerization.

Making catalyst component or/and during promotor, can add at least a electron donor therein.This electron donor can be selected in following compound: (as silicane and chemical formula is SiR for polyester, ethers and the polyethers of Louis's bases, ester class and oxygen acid, amine, silicon compound class ₁R ₂(OR) ₂, SiR ₁(OR) ₃Or SiR ₁R ₂R ₃(OR) alkylalkoxy silane class, wherein different R is the alkyl of 1 to 12 carbon) and phosphorus compound (as phosphoric acid salt and phosphonates), preferably the alkylation ester class of aromatic acid and polyester, alkyl monoether or two ethers, alkoxyl silicone alkanes and alkylalkoxy silane class.

By MgCl of the present invention ₂The catalyzer that the component that makes makes is applicable to all types of polyreactions of olefines: high pressure and low-pressure polymerization, suspension polymerization, vapour phase polymerization, mass polymerization.

By MgCl of the present invention ₂The catalyst component that makes, equally also be to constitute by hexahedron that is primitive rule at microscopically or octahedra shape of microparticles, wherein symmetric relatively in twos each face is substantially parallel, and wherein constitute polyhedral above and the big face of two little prolongations of bottom surface, diagonal lines (D) the longest in each face is greater than the shortest distance (d) of separating two relative edges, two little big by constitute each limit of described polyhedron basic for other each faces of orthogonal substantially vertically round, the length (c) of described basic minor face for each face of orthogonal is less than the minor increment (d) that separately respectively prolongs big face two relative edges.

Because symmetric relatively in twos each face is substantially parallel on the polyhedron, it is basic identical on geometrical shape that in fact described each face can be thought.

The long-diagonal (D) of polyhedral two big faces on each is generally 5 to 70 microns.Separately these two shortest distances (d) that prolong each relative both sides of big face are generally 2 to 30 microns.The length (e) (also can think the thickness of catalyst component particulate) that constitutes the minor face of polyhedral other each face is generally 1 to 10 micron.The combination of the size of these catalyst component particulates will be observed polyhedral definition certainly.Therefore, preferably the ratio of D/d is 2 to 7, and the ratio of d/e is 1 to 3.

Accompanying drawing 1 and Fig. 2 have represented the particulate of these catalyst components with synoptic diagram.

Catalyst component generally has the particle number more than 90% to be made of hexahedron that is limited and octahedra mixture.The per-cent that but can not get rid of the particulate that does not meet this definition is owing to have from the polyhedral surface layer remnants that more or less lose in the process of handling.

The particulate of these catalyst components has essentially smooth surface, and the porosity of particulate is generally 0.1 to 2 centimetre ³/ gram, preferred 0.2 to 1.5 centimetre ³/ gram.The specific surface area of catalyst component is generally 1 to 600 meter ²/ gram, preferred 1 to 50 meter ²/ gram.

According to the mensuration of MALVERN method, the particulate mean size of catalyst component is generally 5 to 70 microns, and for narrow particle size dispersion preferred 10 to 50 microns.Ratio as previously defined particle size dispersion width D 90/D10 is generally less than 15, more generally less than 10.

Catalyst component can prepare in a known manner.With a kind of liquid transition metallic compound or with containing the especially transition metal solution of the chlorine atom aforesaid MgCl that infiltrates of or how little halogen atom ₂Particulate.Before this infiltration operations or simultaneously, can advise the electron donor that deposit has been mentioned above at least a.

The catalyst component that is obtained combines with a kind of conventional promotor, this conventional promotor is selected from organo-aluminium compound usually, as alumina alkane, aluminium type siloxane, the compound (wherein R represents alkyl) that contains the Al-R-Al key or chemical formula is the compound of AlXqR ' s, wherein X represents Cl or OR ', and R ' represents C ₁To C ₁₆(be preferably C ₁To C ₁₂) alkyl, and q and S are all numerical value, 1≤S≤3,0≤q≤2, and q+S=3, formed catalyzer is suitable for the polymerization of alkene, especially more be applicable to the polymerization of ethene, propylene, 1-butylene, 4-methyl-1-pentene and 1-hexene, octene, 1,3-butadiene or their mixture.About promotor, then do not get rid of the combination electron donor of more than one fronts qualifications at least.Catalyst component and promotor be that aluminium in the promotor is between 0.5 to 2000 with the mol ratio of the transition metal in the described component in conjunction with ratio, between preferred 1 to 1000.

Utilize the catalyst system that limits previously to realize above-mentioned alkene (C normally ₂To C ₁₂Alkene, individually or mix ground) polymerization, can carry out solution polymerization, perhaps in inert liquid medium, especially suspension polymerization in aliphatic hydrocrbon such as normal heptane, normal hexane, isohexane or Trimethylmethane, also can be under remaining on overcritical or liquid state at least aly treat to carry out in the polymeric alkene mass polymerization.

The amount of the operational condition of liquid polymerization, particularly temperature, pressure, catalyst system is the normal condition when similar occasions adopts carrier model or non-carrier model Z-N conventional catalyst system.

For example, when carrying out suspension polymerization or carrying out solution polymerization in inert liquid medium, service temperature reaches as high as 250 ℃, and pressure can be pressed onto 2.5 * 10 from atmosphere ⁷Pa.During polymerization, temperature can be up to critical temperature in the propylene liquid medium, and pressure can be pressed onto between the emergent pressure at atmosphere.When the multipolymer that the mass polymerization of ethene or copolymerization system polyethylene or ethene occupy the majority, service temperature can be between 130 ℃ to 350 ℃, and pressure can be 2 * 10 ⁷To 3.5 * 10 ⁸Pa.

Form with a kind of promotor and above-mentioned electron donor in conjunction with resulting catalyst system by transition metal of the present invention, also can be applicable to the vapour phase polymerization of above-mentioned alkene or alkene mixture.Particularly, can carry out the mixture of ethene or propylene with described catalyst system contact, and one or more C ₂To C ₁₂The vapour phase polymerization of alkene (as ethene, propylene, 1-butylene, 1-hexene, 4-methyl-1-pentene and 1-octene), when contacting with catalyst system, containing mol ratio is 0.1 to 90%, is preferably 1 to 60% C ₂To C ₁₂Comonomer.

Can in all allow to do the reactor of vapour phase polymerization, carry out with the vapour phase polymerization of the alkene of catalyst system contact, especially stir and/or fluidized-bed reactor in carry out.Carry out the condition of vapour phase polymerization, main as temperature, pressure, to stirring and/or the adjusting of fluidized-bed reactor adding alkene, polymerization temperature and pressure etc., it is identical all to be used for the normal condition of alkene gas-phase polymerization with prior art.Service temperature generally is lower than the fusing point Tf that wants synthetic polymkeric substance or multipolymer, especially+20 ℃ and (Tf-5) ℃ between, pressure then will make the alkene in the reactor and other hydro carbons monomer that may contain is in gas phase basically.

For the polymkeric substance of controlling generation or the melt index of multipolymer, solution, suspension, body or vapour phase polymerization also can be carried out moving in the presence of the chain agent.Preferably moving the chain agent is hydrogen, and consumption is the highest to can be 90%, preferred 0.1 to 60% of the alkene that enters into reactor and hydrogen cumulative volume.

Transition metal component of the present invention also can be used for preparing active prepolymer, and it can be used separately also and can be used in combination with the promotor that is selected from the aluminum compound that limits previously.

The preparation method of described active prepolymer is to make one or more C ₂To C ₁₂Alpha-olefin, with by the transition metal component of the present invention catalyst system that forms contact, and use described C in the ratio of pointing out previously with being selected from that the top described promotor that is used for the compound of this purpose combines ₂To C ₁₂The consumption of alkene is every gram transition metal component 2 to 500 grams, preferred 2 to 100 grams.

Catalyst component of the present invention to ethene or propylene or the mixture between them or with the polymerization particularly advantageous of the mixture of another alkene because it makes people might obtain there is not fine particle, size-grade distribution is narrow, flowability is good, melt index is suitable for common purposes polymkeric substance or multipolymer.

Generally at 100 to 3000 microns, particularly 200 to 2000 microns particulate constitutes by mean size for the polyolefine of gained or olefin copolymer.Usually, 90/D10 is less than 15 for particles of powder size distribution width D, and more generally less than 10, the apparent density of measuring according to ASTM standard D1895 method A is generally at 0.3 to 0.6 gram per centimeter ³Between, preferably at 0.4 and 0.5 gram per centimeter ³Between.The flowability of powder improves, and according to the ASTM-D1895 standard test, its numerical value generally is equal to or less than 20 seconds.Their specific surface area is generally 0.1 to 20 meter ²/ gram.Their porosity is at 0.1 to 1 centimetre ³Between/the gram.

Appended photo can be illustrated different aspect of the present invention.

Photo 1 (Fig. 3) amplifies 2000 times, and a MgCl is shown ₂The octahedral form particulate.

Photo 2 (Fig. 4) amplifies 6000 times, and a MgCl is shown ₂The hexahedron grain that declines.

Photo 3 (Fig. 5) amplifies 150 times, and MgCl is shown ₂The particulate group.The MgCl of gained ₂Particulate meets its definition more than 90%.

Photo 4 (Fig. 6) amplifies 540 times, shows the particulate of handling through hyper-proliferative.

Photo 5 (Fig. 7) amplifies 200 times, and catalyst component particulate group is shown.

The mensuration of particulate mean diameter and globule size Tile Width D90/D10 utilizes MALVERN1600 laser particle size meter to carry out.Specific surface area is used the BET method on the QUANTASORB instrument, utilize the isothermal physical adsorption of nitrogen to measure under liquid nitrogen temperature.Pore volume is measured by invade mercury under pressure with ERBASCIENCE 1500 porosimeters.All mensuration all are to allow sample at room temperature through carrying out after two hours the vacuum-treat.

Below each embodiment be used for further illustrating the present invention, but do not limit the present invention.

Embodiment 1

Have in 5 liters of reactors of a screen plate and an oar formula mechanical stirring device by double-jacket temperature control, bottom one, under nitrogen protection, import:

300 gram water content 0.3%, mean sizes is 2 millimeters a technical grade Magnesium Chloride Anhydrous;

2 liters of tetrahydrofuran (THF)s (THF) ₂

Stirring velocity transfers to 150 rev/mins, and temperature transfers to 65 ℃.

After 7 hours reaction, suspension is through filtering, and with the normal hexane washing, and under nitrogen gas stream after the drying, it is mobile good to obtain 530 grams, and mole consists of MgCl ₂1.5THF apparent density is 0.59 gram per centimeter ³The white solid powder.

Sreen analysis draws following numerical value:

The mean size of particulate is 41 microns, is 4.3 with D90/D10 than the globule size Tile Width of value representation.

Particulate presents hexahedron or octahedra shape under scanning electronic microscope, shown in photo l to 3 (Fig. 3 to 5).

Embodiment 2

Except temperature of reaction is defined as 50 ℃, adopt the operational condition of embodiment 1.Obtain 525 gram drying supports with the same manner, its apparent density is 0.6, and the particle mean size is 45 microns, and the globule size Tile Width is 5.0.THF and MgCl ₂Mol ratio remain on l.5.The form of particulate remains unchanged.

Embodiment 3

Before finishing, filter, slowly add l and rise the heptane, repeat EXAMPLE l in reaction.

The drying solid that reclaims has following characteristic: apparent density 0.55, mean particle size are 44 microns, and the globule size Tile Width is 4.3.The form of particulate remains unchanged.

Embodiment 4

Except THF is replaced by the THF/ heptane mixture that contains 20% (weight) heptane, repeat embodiment 1.

The characteristic of the drying solid that reclaims is: apparent density 0.60 gram per centimeter ³, mean particle size is 33 microns, the particle size dispersion width is 5.8.The form of particulate remains unchanged.

Embodiment 5

Except THF is replaced by the THF/ heptane mixture that contains 33% heptane, repeat embodiment 1.The gained drying solid has following characteristic: apparent density is 0.59 gram per centimeter ³, the particulate mean size is 23 microns, the particle size dispersion width is 6.0.The form of particulate remains unchanged.

Embodiment 6

Repeat embodiment 1, and add 45 gram 1.After the drying, solid has following characteristic: apparent density is 0.6 gram per centimeter ³, the particulate mean size is 40 microns, the particle size dispersion width is 5.0.The form of particulate remains unchanged.

Embodiment 7

Except THF is replaced by the THF/THP mixture that contains 10% tetrahydropyrans (THP), repeat embodiment 1.

The solid that reclaims after drying, have following characteristic: apparent density is 0.22 gram per centimeter ³, the particulate mean size is 38 microns, the particle size dispersion width is 3.7.The form of particulate remains unchanged.

Embodiment 8

Repeat embodiment 1, and in MgCl ₂With 300 gram o-benzene butyl phthalate esters (DBP) of adding in the THF mixture and 45 gram 1.

After super-dry, be recovered to mole and formed (MgCl ₂/ THF/DBP) be the solid of (1/1/0.03).Apparent density is 0.65 gram per centimeter ³, the particulate mean size is 40 microns, the particle size dispersion width is 5.4.The form of particulate remains unchanged.

Embodiment 9

Repeat embodiment 1.The drying solid that reclaims is handled again with a kind of triethyl aluminium solution in heptane, and the concentration of triethyl aluminum is 20% (weight), and aluminium/THF mol ratio is 2.Through two hours reaction, the solid that is recovered to after the drying had following characteristic under 80 ℃: apparent density is 0.8 gram per centimeter ³, the particulate mean size is 30 microns, the particle size dispersion width is 5.THF and MgCl ₂Mol ratio near 0.The form of particulate remains unchanged.

Embodiment 10

Repeat embodiment 1.The nitrogen gas stream fluidization treatment of exsiccant pressed powder under 150 ℃ and normal atmosphere 4 hours.

The apparent density of the powder solid that is recovered to is 0.45 gram per centimeter ³, average particle size is 32 microns, the particle size dispersion width is 6.Form remains unchanged.THF and MgCl ₂Mol ratio be 0.2.

Embodiment 11

In the solid that 13.8 grams are prepared by embodiment 1, add 30 milliliters of heptane and 2.5 milliliters of phthalic acid di-n-butyl esters.Stirred 2 hours down at 100 ℃.After the reaction, add 40 milliliters of pure TiCl ₄, and under uniform temp, continue reaction two hours.At last temperature is reduced to 80 ℃, allow solid settlement, siphon fall the supernatant phase.Solid 10%TiCl ₄(volume) 1, the 2-dichloroethane solution down handles twice in 85 ℃, for the time 2 hours.Pass through after sedimentation and the siphon, at room temperature the solid hexane wash.The catalytic solid is dry up to the dry powder that obtains good fluidity under room temperature and vacuum then.The solid analysis result is that the catalytic solid sreen analysis that Ti2.5%, Mg20%, Cl67.6% obtain shows that the mean diameter of particulate is 32 microns, is 4.0 by D90/D10 than the width of value defined.The form of catalytic solia particle is with the homomorphosis of carrier, shown in photo 5 (Fig. 7).

Embodiment 12

The carrier of 10 grams by embodiment 6 preparations is suspended in the heptane, adds phthalic acid di-n-butyl ester then, the concentration that makes this diester is 0.4 mol, and the mol ratio of THF/ diester is 7.

Allow be reflected at 80 ℃ and stir under proceed 3 hours.Filter this suspension.Add 100 milliliters of pure TiCl ₄, and under 90 ℃, stirred 2 hours.Again after filtering, with 100 milliliters of 10%TiCl ₄(volume) 1,2-dichloroethane solution washing 5 times, each one hour, temperature was 80 ℃.

After the filtration, the solid hexane wash, and dry in 80 ℃ nitrogen gas stream.The solid that is recovered to is green-yellow, and analytical results is that Ti, Mg and Cl are respectively 2.3%, 19.5% and 65% (weight).The mean diameter of particulate is 26 microns, and the particle size dispersion width is 4.3.The form of particulate is with similar shown in the photo 5 (Fig. 7).

Embodiment 13

In 1.5 liters of stainless steel reactors that magnetictransmission anchor stirrer and double-deck temperature control chuck be housed, under the propylene steam air-flow, feed 1 liter of heptane, 6 mmole triethyl aluminums and 0.6 mmole cyclohexyl methyl dimethoxy silane.Feed 15 milligrams of catalytic solid and 50 milliliters of hydrogen by embodiment 11 preparations.Temperature is increased to 70 ℃.Feeding relative pressure is 4 * 10 ⁵The propylene gas of Pa.In the entire reaction course, the pressure of reactor is kept by continuous feeding monomer.

React after 90 minutes, cool the temperature to 20 ℃, pressure is reduced to normal atmosphere.

The polymkeric substance that is insoluble to heptane is reclaimed by filtering, and drying is also weighed.With the n-heptane solution evaporation, may dissolved polymers so that reclaim.

Obtain 50.4 gram powder thus, its flowability is splendid, and median size is 400 microns, and the particle size dispersion width is 4.5.From n-heptane solution, reclaim 0.6 gram soluble poly propylene.After extracting soluble polymer in the above-mentioned powder with heptane in the KUMAGAWA instrument, calculating total isotactic index is 97.7%.The melt index of measuring by ASTM D1238 standard method L is 3.5.The apparent density of measuring by ASTM D1895 standard method A is 0.40, and flowability is 18 seconds.

Embodiment 14

In 8 liters of isothermal reactors that magnetictransmission and paddle stirrer be housed, under 30 ℃, feed 2.4 liters of hydrogen, 6 liters of propylene liquids, 18mM triethyl aluminum and 1.8mM cyclohexyl methyl dimethoxy silane in order.Pre-contact fed the catalyst component of 70 milligrams of embodiment 12 after 10 minutes in reactor.Temperature is brought up to 70 ℃ rapidly, and kept 1 hour.

Reaction makes reactor cooling after finishing, and pressure is reduced to normal atmosphere.Be recovered to 2250 gram powder, its flowability good (being measured as 17 seconds) by ASTM D1895 standard, apparent density is up to 0.47 (pressing ASTM D1895 method A), and utilizing the KUMAGAWA instrument to record isotactic index with heptane extraction amorphous polymer is 97.8% (weight).The polymer melt index that records by ASTM D1238 standard method L is 2.9.

This polymkeric substance has following characteristic: median size is 900 microns, and the size distribution width is 5.The D/d ratio of most particulates is between 1.5 and 2.5.

Embodiment 15

Except mixture (both volume ratio the be 14/1) replacement of THF, repeat embodiment 1 by THF/EDIA (diisoamyl ether).The solid characteristic that is recovered to is: apparent density 0.559 gram per centimeter ³, the particulate mean size is 50 microns, particle size dispersion width D 90/D10 is 5.7.The form of particulate remains unchanged.

Embodiment 16

Except mixture (both volume ratios the be 15/1) replacement of THF, repeat embodiment 1 by THF/PMHS (polymethyl hydrogen siloxane).

The solid characteristic that reclaims is: apparent density 0.5 gram per centimeter ³, the particulate mean size is 37 microns, particle size dispersion width D 90/D10 is 6.6.The form of particulate remains unchanged.

Embodiment 17

Restrain 100 milliliters of pure TiCl of adding in the solid of pressing embodiment 1 preparation 20 ₄Stirred 1 hour down at 90 ℃, then with 50 ml volumes than the TiCl that is 10/90 ₄/ DCE (ethylene dichloride) mixed solution washs 8 times down at 80 ℃.After these processing finish, with twice of 100 milliliters of hexane wash.The filtering separation solid, dry in 50 ℃ of nitrogen gas stream then.

Catalytic solid analysis revealed, Ti content are 3.8%, and Mg content is 17%, and Cl content is 61.2%.The mean diameter of catalytic solia particle is 27 microns, and the size distribution width is 3.9.

Embodiment 18

In embodiment 13 described reactors, under 40 ℃ of nitrogen gas stream, feed 1 liter of hexane, 6mM triisobutyl aluminium, 29 milligrams of catalyzer that obtain by embodiment 17.It is 2 * 10 that nitrogen pressure is brought up to total pressure ⁵Pa, temperature regulation to 80 ℃.After temperature reaches balance, feed nitrogen and make pressure reach 3 * 10 ⁵Pa.Adding relative pressure is 4 * 10 ⁵The hydrogen of Pa and 6 * 10 ⁵The ethene of Pa.Feed ethene again, keep constant pressure 1.3 * 10 ⁶The Pa absolute pressure.

After 120 minutes reaction, cool the temperature to 40 ℃, reactor is depressured to normal atmosphere.After filtration and the drying, be recovered to 646 gram polymkeric substance.

Productive rate is that every gram catalyzer draws 22275 gram polyethylene (PE), and the median size of powder is 542 microns, and apparent density is 0.319 gram per centimeter ³

In feeding quantity is under 2.16 kilograms and 5 kilograms, and the melt index under 190 ℃ is respectively 0.7 and 4.68.

Embodiment 19

Except the catalyzer that adds 20 milligrams of embodiment, 11 preparations, operate by embodiment 18.

Polyreaction continues 180 minutes, is recovered to 405 gram polyethylene after reaction finishes, and promptly productive rate is every gram catalyzer output 20250 gram PE.The mean diameter of polymkeric substance is 521 microns, and apparent density is 0.311 gram per centimeter ³

In feeding quantity is under 2.16 kilograms and 5 kilograms, and the melt index under 190 ℃ is respectively 0.87 and 2.85.

Embodiment 20

A) synthetic prepolymer

In reactor, under 40 ℃ of nitrogen gas stream, introduce with embodiment 13 same types:

0.8 rise anhydrous hexane

14mM THA (three hexyl aluminium)

The catalyzer and then the introduction relative pressure of 1 gram embodiment, 11 preparations are 2 * 10 ⁵The hydrogen of Pa.And then introduce the ethene of dominant discharge by following program:

1.2 rise/hours 30 minutes

2 liters/hour 30 minutes

4 liters/hour 30 minutes

8 liters/hour 30 minutes

16 liters/hour 30 minutes

30 liters/hour 130 minutes

Make the reactor step-down, hexane evaporates in 70 ℃ of nitrogen gas stream.Collect 94 gram prepolymers, pre-polymerization is right to restrain PE for every gram catalyzer draws 94.

B) the synthetic high density polyethylene(HDPE) of gas phase

With 8.2 liters of temperature control reactors of the exsiccant that agitator is housed, in the presence of the sub polyethylene bulk cargo of 20 grams, operate from the front identical test.

Reactor remains on 90 ℃ between whole polymerization period, and under the vacuum of 400 rev/mins stirring velocitys and 1.33 handkerchiefs, injecting hydrogen is 6 * 10 up to pressure ⁵The Pa absolute pressure.In reactor, inject 8 * 10 then ⁵The ethene of Pa pressure reaches 6 * 10 respectively up to the dividing potential drop of hydrogen and ethene ⁵Pa and 8 * 10 ⁵The Pa absolute pressure.

After injecting these materials, by the active prepolymer that nitrogen advances 4 grams to prepare above, the total pressure that nitrogen will be injected in the reactor always reaches 2.1 * 10 ⁶The Pa absolute pressure.Inject ethene pressure is maintained this numerical value.After 120 minutes reaction, make the reactor step-down stop polymerization.Make its cooling with the nitrogen purging reactor.

Reclaim 359 gram high-density polyethylene powder thus, comprised original feed.Productive rate is that every gram catalyzer produces 7920 gram polyethylene.The median size of powder is 495 microns, and apparent density is 0.359 gram per centimeter ³When feeding quantity was 2.16 kilograms and 5 kilograms, the melt index under 190 ℃ was respectively 4.55 and 14.6.

C) gas phase synthesizing ethylene/butene-1 copolymer

In 8.2 liters of isothermal reactors of the exsiccant that paddle stirrer is housed, in the presence of the polyethylene powders of 20 grams, operate from top identical test.Reactor maintenance temperature is 85 ℃ between whole polymerization period, under the vacuum of about 400 rev/mins stirring velocity and 1.33 handkerchiefs, injects 1-butylene and reaches 1 * 10 up to absolute pressure ⁵Pa.Continue to inject 1-butylene and rise to 1.5 * 10 up to absolute pressure ⁵Pa.

Inject 1 * 10 to reactor continuously then ⁵Pa hydrogen and 4.5 * 10 ⁵Pa ethene reaches 1 * 10 up to hydrogen and ethylene partial pressure ⁵Pa and 4.5 * 10 ⁵Pa.Advance 3 gram active prepolymers with hydrogen pressure more afterwards, hydrogen is injected into the interior total pressure of reactor always and reaches 2.1 * 10 ⁶The absolute pressure of Pa.By injecting mol ratio is that the mixture of 1-butylene/ethene of 0.0466 remains on this numerical value with pressure.After 120 minutes reaction, the reactor step-down is stopped polymerization.Make its cooling with the nitrogen purging reactor then.

Be thus recovered into 372 gram ethene/butene-1 copolymers, comprise original feed.Productive rate is that every gram catalyzer produces 11000 gram polyethylene, and density is 0.918 gram per centimeter ³The median size of powder is 407 microns, and apparent density is 0.290 gram per centimeter ³When feeding quantity was 2.16 kilograms and 21.6 kilograms, the melt index under 190 ℃ was respectively 1.35 and 47.1.

Embodiment 21

In 1 liter of reactor that agitator and double-deck refrigeration cycle temperature control chuck are housed, under 80 ℃ and about 100 rev/mins stirring velocity, add:

1.3 the anhydrous MgCl of mole ₂

0.098 mole durene

9 moles of THF

Under 100 rev/mins speed, stirred 1.5 hours, stirred 2.5 hours down at 250 rev/mins then.

Suspension is moved to the Schlenk pipe.From this suspension, get an aliquots containig and filter, use hexane wash, to analyze the solid S1 of gained.

In reactor, add a sample aliquot of gained suspension, wherein contain 90mMMgCl ₂, 623mM THF, 6.78mM durene.Under about 150 rev/mins stirring velocity and 60 ℃, with adding isopyknic hexane in 30 minutes.

Under 60 ℃, continuing adding simultaneously under the stirring then:

514 milliliters of 60 ℃ of MgCl ₂Saturated THF solution (contains 20 gram MgCl ₂);

514 milliliters of hexanes.

After hyperplasia finishes,, filter then the suspension cool to room temperature.Carrier is with 500 milliliters of hexane wash three times, and is dry in 50 ℃ of nitrogen gas stream.Carrier S 2 is displaced downwardly to the Schlenk pipe in nitrogen protection.Isolate 58 gram MgCl ₂1.5THF title complex.

Carrier	D90	Mean diameter	D10	D90/D10
					S1 S2	94.1 111.6	49.55 60.4	17.28 23.43	5.4 4.8

The outward appearance of particulate under scanning electronic microscope is shown in photo 4 (Fig. 6).

Claims (15)

1. catalyst component, wherein this catalyst component is had the MgCl of transistion metal compound basically by infiltration ₂Particulate is formed, it is characterized in that described particulate is the hexahedron or the octahedra shape of primitive rule at microscopically, its symmetrical in twos face is substantially parallel, and constitute one polyhedral above and two elongated big of bottom surface, diagonal lines (D) the longest in each face is greater than the minor increment (d) of separating two opposite sides, two big faces by constitute each limit of described polyhedron basic for other each faces of orthogonal substantially vertically round, described be that the length (e) of minor face of each face of orthogonal is less than the shortest distance (d) of separating each elongated big two opposite sides substantially.

2. catalyst component according to claim 1 is characterized in that the geometrical shape of each symmetrical in twos face is basic identical.

3. catalyst component according to claim 1 and 2, the ratio that it is characterized in that (D)/(d) is 2 to 7.

4. catalyst component according to claim 1 and 2, the ratio that it is characterized in that (d)/(e) is 1 to 3.

5. catalyst component according to claim 1 and 2 is characterized in that (D) is 5 to 70 microns.

6. catalyst component according to claim 1 and 2 is characterized in that (d) is 2 to 30 microns.

7. catalyst component according to claim 1 and 2 is characterized in that (e) is 1 to 10 micron.

8. catalyst component according to claim 1 and 2 is characterized in that wherein being made up of hexahedron and octahedral mixture greater than 90% quantity.

9. catalyst component according to claim 1 and 2 is characterized in that its particulate porosity is 0.1 to 2 centimetre ³/ gram.

10. catalyst component according to claim 1 and 2 is characterized in that its specific surface area is 1 to 600 meter ²/ gram.

11. catalyst component according to claim 1 and 2 is characterized in that its particle size is 5 to 70 microns, 90/D10 is less than 15 for the particle size dispersion width D.

12. catalyst component according to claim 1 and 2 is characterized in that its preparation method is at described MgCl with a kind of transistion metal compound infiltration ₂On the particulate.

13. catalyst component according to claim 1 and 2 is characterized in that described transistion metal compound is the halogenide of titanium.

14. catalyst component according to claim 1 and 2 is characterized in that wherein also comprising electron donor.

15. catalyst component according to claim 12 is characterized in that described transistion metal compound is the halogenide of titanium.

Images