CN100590134C - Montmorillonite/MgCl2 composite carrier load alpha-2 imine nickel catalyst, and method for preparing polythene/montmorillonite composite material - Google Patents
Montmorillonite/MgCl2 composite carrier load alpha-2 imine nickel catalyst, and method for preparing polythene/montmorillonite composite material Download PDFInfo
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- CN100590134C CN100590134C CN200810025909A CN200810025909A CN100590134C CN 100590134 C CN100590134 C CN 100590134C CN 200810025909 A CN200810025909 A CN 200810025909A CN 200810025909 A CN200810025909 A CN 200810025909A CN 100590134 C CN100590134 C CN 100590134C
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Abstract
The invention discloses an alpha-diketinimatonickel catalyst loaded on a montmorillonite/MgCl2 composite carrier and a method for preparing a polythene/montmorillonite composite material. The preparation method includes that organic improved montmorillonite, anhydrous magnesium chloride, ethanol and triethylaluminum are firstly used for preparing a novel carrier, then N, N' -di-(2, 6- dimethyl-phenyl)-acenaphthenequinonediimine nickelous chloride is loaded on the carrier to form a support-type catalyst, finally, aluminium diethyl monochloride is used as a drier activator to initiate ethylene polymerization so as to prepare the polythene/montmorillonite composite material under different reaction conditions. The novel support-type catalyst of the invention has simple preparation, good stability, and higher catalytic activity; besides, the montmorillonite can be distributed evenly in polythene resin. The polythene/montmorillonite composite material prepared in the invention is characterized by high molecular weight and good heat resistance.
Description
Technical field
The present invention relates to chemical field, be specifically related to prepare polynite/magnesium chloride-ethanol complex carrier, and the load alpha-diimine nickel, cause vinyl polymerization and prepare polyethylene/montmorillonite nanometer composite material.
Background technology
Polyvinyl resin physical and chemical performance excellence, price is relatively cheap, is range of application general-purpose plastics kind the most widely in the world.Alpha-diimine nickel class catalyst vinyl polymerization has high polymerization activity, and the polythene material of preparation has certain degree of branching.
But also there are some shortcomings in polythene material, and is poor such as resistance toheat, poor processability or the like.One of method of improving these performances is exactly to introduce mineral filler to prepare composite polyethylene material in polyvinyl resin.In various fillers, polynite is because the laminate structure of itself has caused concern widely.
Magnesium chloride-ethanol complex is as carrier, and load alpha-diimine class catalyzer can further improve the activity of vinyl polymerization.Can improve simultaneously the stability of catalyzer.
Magnesium chloride-ethanol complex and polynite are combined, prepare the novel complex carrier that contains polynite, and then preparation alpha-diimine class supported catalyst, catalyzed ethylene polymerization is the feasible method of a preparation polyethylene/montmorillonite nanometer composite material.
Summary of the invention
The purpose of this invention is to provide a kind of polynite/MgCl that can be used for catalytic preparation polyethylene/montmorillonite composite material
2Composite carrier load alpha-diimine nickel catalyzator.
Another object of the present invention provides utilizes above-mentioned polynite/MgCl
2The method of composite carrier load alpha-diimine nickel Preparation of Catalyst polyethylene/montmorillonite matrix material.
Above-mentioned purpose of the present invention solves by following technological method:
A kind of polynite/MgCl
2Composite carrier load alpha-diimine nickel catalyzator is prepared from by following steps:
(1) under the anhydrous and oxygen-free condition, after organic modification montmonrillonite, Magnesium Chloride Anhydrous and dehydrated alcohol mixing stirring, add anhydrous normal heptane and make the reactant recrystallization, drain unreacted normal heptane, obtain powdery substance;
(2) under the anhydrous and oxygen-free condition, in powdery substance, add the triethyl aluminum n-heptane solution, leave standstill after the stirring, with anhydrous normal heptane washing reaction product, drain remaining normal heptane, obtain complex carrier;
(3) with N, N '-two-(2,6-dimethyl-phenyl) the Nickel Chloride title complex loads on the complex carrier, stir, the standing and reacting thing is extracted supernatant liquid out and is squeezed into the anhydrous methylene chloride washing again, and so repetitive scrubbing is till the supernatant liquid of extracting out becomes colorless, drain the residue methylene dichloride, make polynite/MgCl
2Composite carrier load alpha-diimine nickel catalyzator.
Above-mentioned organic modification montmonrillonite is prepared from by following method:
(1) under the room temperature, polynite was mixed stirring after 24 hours with the magnesium chloride saturated solution,, till not having white precipitate, obtain the magnesium base montmorillonite with the silver nitrate solution check filtrate of 1mol/L with pure water washing, suction filtration;
(2) magnesium base montmorillonite, hexadecyl trimethyl ammonium bromide and pure water are mixed, after stirring 24 hours under 80 ℃, obtain organic modification montmonrillonite through suction filtration, vacuum drying.
The preparation method of polyethylene/montmorillonite nanometer composite material, with above-mentioned polynite/MgCl2 composite carrier load alpha-diimine nickel catalyzator is Primary Catalysts, aluminium diethyl monochloride is a cocatalyst, under the anhydrous and oxygen-free condition, carry out ethylene polymerization, the temperature of polyreaction is 0～30 ℃, Primary Catalysts is 150～450: 1 with the ratio of the amount of substance of cocatalyst, makes the polyethylene/montmorillonite matrix material.Preferred 350: 1 of the ratio of Primary Catalysts and the amount of substance of cocatalyst.
Compared with prior art, the present invention has following beneficial effect: 1. polynite/MgCl of the present invention
2Composite carrier load alpha-diimine nickel Preparation of catalysts method is simple, good stability, catalytic activity height, and polynite can be in polyvinyl resin homodisperse.2. the present invention adopts novel supported catalyst, makes ethene carry out polymerization under different temperature, different aluminium nickel mol ratio, prepares the polyethylene/montmorillonite matrix material.3. can prepare the polyethylene/montmorillonite matrix material of high molecular, Good Heat-resistance by preparation method of the present invention.
Description of drawings
Fig. 1 is the transmission electron microscope picture of polyethylene/montmorillonite matrix material.
Embodiment
The preparation of embodiment 1 organic modification montmonrillonite
Under the room temperature polynite and magnesium chloride saturated solution were stirred 24 hours.With pure water washing, suction filtration, till not having white precipitate, obtain the magnesium base montmorillonite then with the silver nitrate solution check filtrate of 1mol/L.Then magnesium base montmorillonite and hexadecyl trimethyl ammonium bromide and pure water were stirred 24 hours down at 80 ℃, obtain organic modification montmonrillonite through suction filtration, vacuum drying at last.
The preparation of embodiment 2 polynites/ethanol-magnesium chloride support
Under 120 ℃ of conditions of anhydrous and oxygen-free,, dissolve fully to magnesium chloride 5 gram organic modification montmonrillonites, 5 gram Magnesium Chloride Anhydrouss, 10 milliliters of absolute ethyl alcohol and stirring 24 hours.Squeeze into 30 milliliters of anhydrous normal heptanes again and make the reactant recrystallization, drain unreacted normal heptane then, obtain powdery substance.Next under anhydrous and oxygen-free zero degree condition, in powdery substance, squeeze into 40 milliliters of triethyl aluminum n-heptane solutions (triethyl aluminum concentration is 0.45 grams per milliliter), stirred 24 hours.Standing and reacting product then, with anhydrous normal heptane washing reaction product for several times.Drain remaining normal heptane at last, obtain carrier.
Embodiment 3 N, the load of N '-two-(2,6-dimethyl-phenyl) Nickel Chloride composition catalyst
With 1 * 10
-4Mole N, N '-two-(2,6-dimethyl-phenyl) Nickel Chloride title complex is dissolved in 5 milliliters of anhydrous methylene chlorides.Under 40 ℃ of conditions of anhydrous and oxygen-free, carrier and 27 milliliters of anhydrous methylene chlorides of this solution and 2 being restrained gained among the embodiment 2 stirred 5 hours.Then the standing and reacting product is extracted supernatant liquid out and is squeezed into the anhydrous methylene chloride washing again.Extract out so repeatedly, wash for several times, till the supernatant liquid of extracting out becomes colorless.Drain the residue methylene dichloride at last, obtain supported catalyst.Measure through ICP, it is 0.08% that supported catalyst carries the nickel amount.
Synthesizing of embodiment 4 polyethylene/montmorillonite matrix materials
In the vial of the 50mL of vacuum and heating drying; under protection of nitrogen gas, add the 70mg supported catalyst; then extract nitrogen out; charge into ethylene gas; reinject 25mL through sodium Metal 99.5 backflow exsiccant toluene, squeeze into the n-heptane solution (aluminium diethyl monochloride concentration: 0.38g/mL, the ratio of aluminium diethyl monochloride and the amount of substance of nickel 1: 350) of 0.1mL promotor aluminium diethyl monochloride at last; regulating ethylene pressure is 1.3 normal atmosphere, 0 ℃ of polymerization 60min under magnetic agitation.Add acidifying ethanol termination reaction.The polymeric catalytic activity is 2.5 * 10
5GPE/mol Nih.The viscosity-average molecular weight of gained polyethylene/montmorillonite matrix material is 6.79 * 10
5, Tm is 129.2 ℃, maximum heat rate of decomposition corresponding temperature is 476.2 ℃.
Synthesizing of embodiment 5 polyethylene/montmorillonite matrix materials
Press the polymerization process of embodiment 4, polymerization temperature is 20 ℃, the ratio of aluminium diethyl monochloride and the amount of substance of nickel 1: 350, and other condition is identical.Catalytic activity is 3.5 * 10
5G PE/molNi.h.The viscosity-average molecular weight of gained polyethylene/montmorillonite nanometer composite material is 3.08 * 10
5, Tm is 118.6 ℃, maximum heat rate of decomposition corresponding temperature is 474.2 ℃.The transmission electron microscope picture shows as shown in Figure 1: polynite is homodisperse in polyvinyl resin, and the montmorillonite particle size is below 100 nanometers.
Synthesizing of embodiment 6 polyethylene/montmorillonite matrix materials
Press the polymerization process of embodiment 4, polymerization temperature is 30 ℃, the ratio of aluminium diethyl monochloride and the amount of substance of nickel 1: 350, and other condition is identical.Catalytic activity is 4.5 * 10
4G PE/molNi.h.The viscosity-average molecular weight of gained polyethylene/montmorillonite matrix material is 1.12 * 10
5, Tm is 98.7 ℃, maximum heat rate of decomposition corresponding temperature is 459.3 ℃.
Synthesizing of embodiment 7 polyethylene/montmorillonite matrix materials
Press the polymerization process of embodiment 4,0 ℃ of polymerization temperature, aluminium diethyl monochloride is 1: 150 with the ratio (AL/Ni) of the amount of substance of nickel, other condition is identical.Catalytic activity is 1.0 * 10
5GPE/mol Ni.h.The viscosity-average molecular weight of gained polyethylene/montmorillonite matrix material is 7.02 * 10
5, Tm is 129.7 ℃, maximum heat rate of decomposition corresponding temperature is 469.1 ℃.
Synthesizing of embodiment 8 polyethylene/montmorillonite matrix materials
Press the polymerization process of embodiment 4,0 ℃ of polymerization temperature, aluminium diethyl monochloride is 1: 450 with the ratio (AL/Ni) of the amount of substance of nickel, other condition is identical.Catalytic activity is 9 * 10
4GPE/mol Ni.h.The viscosity-average molecular weight of gained polyethylene/montmorillonite matrix material is 5.39 * 10
5, Tm is 127.8 ℃, maximum heat rate of decomposition corresponding temperature is 464.8 ℃.
Claims (3)
1. polynite/MgCl
2Composite carrier load alpha-diimine nickel catalyzator is characterized in that being prepared from by following steps:
(1) under 120 ℃ of conditions of anhydrous and oxygen-free, after organic modification montmonrillonite, Magnesium Chloride Anhydrous and dehydrated alcohol mixing stirring, add anhydrous normal heptane and make the reactant recrystallization, drain unreacted normal heptane, obtain powdery substance;
(2) under anhydrous and oxygen-free zero degree condition, in powdery substance, add the triethyl aluminum n-heptane solution, leave standstill after the stirring, with anhydrous normal heptane washing reaction product, drain remaining normal heptane, obtain complex carrier;
(3) with N, N '-two-(2,6-dimethyl-phenyl) the Nickel Chloride title complex loads on the complex carrier, stir, the standing and reacting thing is extracted supernatant liquid out and is squeezed into the anhydrous methylene chloride washing again, and so repetitive scrubbing is till the supernatant liquid of extracting out becomes colorless, drain the residue methylene dichloride, make polynite/MgCl
2Composite carrier load alpha-diimine nickel catalyzator;
Described organic modification montmonrillonite is prepared from by following method:
(1) polynite is mixed with the magnesium chloride saturated solution stir after, obtain the magnesium base montmorillonite with pure water washing, suction filtration;
(2) with after magnesium base montmorillonite, hexadecyl trimethyl ammonium bromide and the pure water mixing stirring, obtain organic modification montmonrillonite through suction filtration, vacuum drying.
2. the preparation method of a polyethylene/montmorillonite nanometer composite material is characterized in that: with the described polynite/MgCl of claim 1
2Composite carrier load alpha-diimine nickel catalyzator is a Primary Catalysts, aluminium diethyl monochloride is a cocatalyst, under the anhydrous and oxygen-free condition, carry out ethylene polymerization, the temperature of polyreaction is 0～30 ℃, Primary Catalysts is 150～450: 1 with the ratio of the amount of substance of cocatalyst, makes the polyethylene/montmorillonite matrix material.
3. preparation method according to claim 2 is characterized in that the described Primary Catalysts and the ratio of the amount of substance of cocatalyst are 350: 1.
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| CN200810025909A CN100590134C (en) | 2008-01-18 | 2008-01-18 | Montmorillonite/MgCl2 composite carrier load alpha-2 imine nickel catalyst, and method for preparing polythene/montmorillonite composite material |
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| CN102336846B (en) * | 2011-07-07 | 2013-04-10 | 中山大学 | Loaded alpha-palladium diimine and method for preparing hyperbranched polyethylene by catalyzing with same |
| CN102336850B (en) * | 2011-07-07 | 2013-07-17 | 中山大学 | Catalyst for catalyzing chain shuttle polymerization of ethylene and application thereof |
| CN104829643B (en) * | 2015-04-30 | 2017-06-06 | 河北工业大学 | A kind of application of α diimine compounds and its load type gold metal complex with alkoxyl silicone |
| CN104804030B (en) * | 2015-04-30 | 2017-06-06 | 天津工业大学 | Support type α diimine compounds and its application in olefin polymerization |
| CN104788489B (en) * | 2015-04-30 | 2017-08-25 | 河北工业大学 | A kind of SiO2The α diimine compounds of load and its application of metal complex |
| CN110483587B (en) * | 2019-08-27 | 2021-07-09 | 中国科学技术大学 | Large steric hindrance ketimine nickel catalyst and ligand compound, preparation method and application thereof |
| CN112898459A (en) * | 2019-12-03 | 2021-06-04 | 中国石油天然气股份有限公司 | Preparation method of spherical modified montmorillonite and preparation method of spherical polyolefin catalyst |
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