WO2013058193A1 - マグネシウムアルコラートの製造方法 - Google Patents
マグネシウムアルコラートの製造方法 Download PDFInfo
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- WO2013058193A1 WO2013058193A1 PCT/JP2012/076502 JP2012076502W WO2013058193A1 WO 2013058193 A1 WO2013058193 A1 WO 2013058193A1 JP 2012076502 W JP2012076502 W JP 2012076502W WO 2013058193 A1 WO2013058193 A1 WO 2013058193A1
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- magnesium
- particle size
- alcohol
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/68—Preparation of metal alcoholates
- C07C29/70—Preparation of metal alcoholates by converting hydroxy groups to O-metal groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/68—Preparation of metal alcoholates
- C07C29/72—Preparation of metal alcoholates by oxidation of carbon-to-metal bonds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/28—Metal alcoholates
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/28—Metal alcoholates
- C07C31/30—Alkali metal or alkaline earth metal alcoholates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/06—Metallic compounds other than hydrides and other than metallo-organic compounds; Boron halide or aluminium halide complexes with organic compounds containing oxygen
Definitions
- the present invention relates to a method for producing a magnesium alcoholate used for preparing a solid catalyst component for olefin polymerization.
- This application claims priority based on Japanese Patent Application No. 2011-229527 for which it applied to Japan on October 19, 2011, and uses the content here.
- Patent Document 1 discloses that the final use ratio of metal magnesium and alcohol to the reaction system is 1/4 to 1/25 in mass ratio, and the reaction system under reflux of alcohol is used. A method is disclosed in which granular metallic magnesium having a diameter of 500 ⁇ m or less and alcohol are added continuously or intermittently in a divided manner and reacted for 100 to 1200 minutes.
- the addition of magnesium metal and alcohol is divided into 10 or more, and the addition time is arbitrarily selected from the range of 10 to 120 minutes, and the total addition time is 1200 minutes or less. It is described that it is preferable to carry out within the range.
- the average particle diameter has a spherical or ellipsoidal particle shapes ranging from 60 ⁇ 200 [mu] m represented by D 50, having a bulk density of 0.2 ⁇ 0.7 g / ml, A dialkoxymagnesium granular material having a large number of pores having a pore diameter of 0.1 to 5 ⁇ m by TEM observation and having a particle size distribution represented by (D 90 -D 10 ) / D 50 of 1 or less, It is described that the fracture strength of the agglomerated granular material is 0.5 to 10 MPa.
- a catalyst In the synthesis reaction according to the method, it is preferable to use a catalyst, and iodine and the like are exemplified as a useful catalyst. Further, this catalyst may be added to the reaction system all at once, It is described that it may be added while adjusting the amount in accordance with divided addition.
- Patent Document 2 discloses that average grain size is obtained by reacting metal magnesium, alcohol, and a halogen-containing compound containing halogen in an amount of 0.0001 gram atom or more with respect to 1 gram atom of metal magnesium.
- the diameter is 1 to 300 ⁇ m
- the particle size distribution index (P) represented by the following formula (1) is P ⁇ 5.0
- the particle size distribution is narrow, and no particle size adjustment treatment such as pulverization or classification is performed.
- D10 represents a particle size corresponding to a cumulative weight fraction of 10%.
- a particle size distribution represented by (D 90 -D 10 ) / D 50 was known to be 1 or less, but a particle size distribution smaller than 0.78 is known.
- magnesium alcoholate having a smaller particle size distribution has been demanded.
- the average particle size represented by D 50 is less than 60 ⁇ m and the particle size distribution represented by (D 90 -D 10 ) / D 50 is 1 or less.
- magnesium alcoholate having a small particle size distribution has been demanded.
- Patent Document 1 describes that the catalyst used may be added to the reaction system while adjusting the amount in accordance with the divided addition of the raw material, but when the number of divided additions of the raw material is small, For example, in the case of about 4 to 5 times, the target product (average particle size represented by D 50 is 60 to 200 ⁇ m, and the particle size distribution represented by (D 90 -D 10 ) / D 50 is 1 or less. It has been suggested that no magnesium alcoholate is obtained. Further, in Patent Document 2, it is described that the number of divisions is preferably about 5 to 10 times. However, there is a method in which all the alcohol is charged from the beginning and metal magnesium is divided into several times. Preferred is described.
- Patent Documents 1 and 2 describes or suggests a specific divided addition method, such as how to add in a divided manner and an optimal ratio of each raw material to be added in divided portions.
- An object of the present invention is to provide a spherical or ellipsoidal magnesium alcoholate having a narrow particle size distribution even when the particle size is small.
- the present invention relates to a method for producing magnesium alcoholate in which metallic magnesium, alcohol, and at least one of a halogen or a halogen atom-containing compound are separately added to a reaction system under reflux of the alcohol and reacted. And a mixture of at least one of halogen and a halogen atom-containing compound is added to the reaction system for each divided addition, and relates to a method for producing magnesium alcoholate.
- the number of times the mixture is added in portions is preferably less than 10 times, the mass ratio of metal magnesium and alcohol in the mixture added in portions, and metal magnesium and halogen or It is preferable to make the mass ratio with the halogen atom-containing compound substantially constant for each divided addition, and it is also preferable to make the interval of divided addition constant.
- magnesium alcoholate production method of the present invention an unprecedented quality magnesium alcoholate with controlled particle size distribution, particle size, and particle shape can be obtained. That is, according to the production method, granular magnesium alcoholate having a spherical or ellipsoidal particle shape having a particle size distribution represented by (D 90 -D 10 ) / D 50 of less than 0.78, or D 50 Production of magnesium alcoholate, which is a granular material having a spherical or ellipsoidal particle shape, having an average particle size of less than 60 ⁇ m and a particle size distribution of (D 90 -D 10 ) / D 50 of 1 or less be able to. Olefin polymer with controlled particle size distribution, particle size, and particle type by preparing a catalyst for olefin polymerization using magnesium alcoholate with controlled particle size distribution, particle size, and particle type obtained by the method Can be obtained.
- D 10 , D 50 , and D 90 used in the present invention indicate particle sizes at 10%, 50%, and 90% in terms of cumulative particle size. That is, for example, D 10 is intended to refer to the particle diameter when the cumulative value of the mass of particulate matter by measuring the particle size distribution of the granules became 10 mass%. Thus, D 50 represents the intermediate value of the particle total particle size becomes to indicate the average particle size.
- the production method of the magnesium alcoholate of the present invention is a method in which metallic magnesium, alcohol, and at least one of a halogen or a halogen atom-containing compound are dividedly added to a reaction system under reflux of alcohol and reacted.
- a mixture of magnesium metal, an alcohol, and at least one of a halogen or a halogen atom-containing compound is added to the reaction system every divided addition.
- the metal magnesium used in the production method of the present invention may have any shape as long as it has good reactivity. That is, any shape in the form of granules, ribbons, and powders can be used.
- the degree of oxidation of the surface of the magnesium metal particles is preferably as small as possible, and it is not preferable in use that magnesium oxide is generated on the surface. Therefore, for example, those stored in an atmosphere of an inert gas such as nitrogen and those obtained by treating the metal surface with a solvent that does not affect the reaction to prevent surface oxidation are preferable.
- the particle size of the metallic magnesium used is preferably 350 ⁇ m or less, more preferably 88 to 350 ⁇ m.
- Metallic magnesium having a particle size in this range is suitable for maintaining uniform reactivity.
- metal magnesium particles having a particle size of 500 ⁇ m or less it is preferable to use metal magnesium particles having a particle size of 500 ⁇ m or less, and the average particle size represented by D 50 is 50 to 500 ⁇ m. It is more preferable to use a metal magnesium granule composed of fine particles having a particle size distribution represented by (D 90 -D 10 ) / D 50 of 2 or less.
- the granular material may be in the form of a powder.
- any alcohol can be used as the alcohol used in the production method of the present invention, but a lower alcohol having 1 to 6 carbon atoms is preferably used.
- ethanol because a magnesium compound that significantly improves the expression of catalyst performance can be obtained.
- the purity and water content of the alcohol are not limited, it is preferable that the water content is low.
- an alcohol having a water content of 1% or less is preferably used, and an alcohol having a water content of 2000 ppm or less is more preferably used.
- magnesium hydroxide tends to be easily formed on the surface of the metal magnesium.
- the amount of water in the alcohol is as small as possible, and generally 200 ppm or less is desirable.
- the proportion of metal magnesium and alcohol used at the time when all the raw materials have been added to the reaction system is preferably 1/4 to 1/25 in terms of mass ratio.
- the type of halogen used in the production method of the present invention is not particularly limited, but chlorine, bromine, or iodine is preferable, and iodine is particularly preferably used.
- the type of the halogen atom-containing compound used in the production method of the present invention is not limited, and any compound can be used as long as it is a compound containing a halogen atom in its chemical formula.
- MgCl 2 , Mg (OEt) Cl, Mg (OEt) I, MgBr 2 , CaCl 2 , NaCl, KBr and the like can be exemplified, and among them, MgCl 2 and MgI 2 are preferably used.
- the state, shape, particle size, and the like of the halogen or halogen atom-containing compound added to the reaction system are not particularly limited, and may be arbitrary.
- it can be used in the form of a solution dissolved in an alcohol solvent such as ethanol.
- the amount of halogen or halogen atom-containing compound used in the production method of the present invention is not particularly limited as long as it is a sufficient amount for the reaction between metal magnesium and alcohol, but when all the raw materials have been added to the reaction system, metal magnesium is used.
- the amount is preferably 0.0001 gram atom or more, more preferably 0.0005 gram atom or more, and further preferably 0.001 gram atom or more with respect to 1 gram atom.
- the halogen or halogen atom-containing compound acts as a catalyst for the reaction between metallic magnesium and alcohol, and the total amount added to the reaction system and the amount added at each divided addition are combined with the divided addition of other raw materials. It is preferred to adjust the amount.
- each of halogen and halogen atom-containing compounds may be used alone or in combination of two or more. Moreover, you may use together a halogen and a halogen atom containing compound.
- the amount of all halogen atoms in the reaction system is preferably 0.0001 gram atom or more, more preferably more than 0.0001 gram atom, with respect to 1 gram atom of metal magnesium at the time when all the raw materials are added to the reaction system 0.0005 gram atoms or more, more preferably 0.001 gram atoms or more.
- the upper limit of the amount of halogen and / or halogen atom-containing compound added to the reaction system is not particularly limited, but is preferably less than 0.06 gram atom per 1 gram atom of metal magnesium.
- Raw materials such as metal magnesium, alcohol, and at least one of halogen or halogen atom-containing compound are added to the reaction system in two or more portions.
- the divided addition of the raw material to the reaction system is performed under reflux of an alcohol solvent, preferably the same alcohol as the raw material.
- the mixture to be added in a divided manner must always contain all three of magnesium metal, alcohol, and at least one of halogen or a halogen atom-containing compound.
- the density of particles apparent specific gravity
- the number of times the mixture is added in portions to the reaction system is not particularly limited as long as it is 2 times or more, but it is preferably divided into 2 times or more and less than 10 times, and it is preferably divided into 2 to 5 times. More preferred.
- the mixture added to the reaction system at the time of divided addition may be any containing metal magnesium, alcohol, and at least one of halogen or a halogen atom-containing compound. That is, the mass ratio of metal magnesium and alcohol in the mixture and the mass ratio of metal magnesium and halogen and / or halogen atom-containing compound are not particularly limited, and may be different for each divided addition. At the time of divided addition, a mixture having the same composition may be added. Moreover, you may divide and add by the raw material ratio of a ratio different from the final addition ratio (ratio of the total addition amount to a reaction system). For example, the ratio of metal magnesium may be increased from the final addition ratio in the early stage of the reaction, and the ratio of metal magnesium may be decreased in the latter half. In the production method of the present invention, the mass ratio of metal magnesium and alcohol in the mixture to be added in portions, and the mass ratio of metal magnesium to halogen or a halogen atom-containing compound may be made substantially constant for each addition. preferable.
- the amount of the mixture added to the reaction system at the time of one divided addition is not particularly limited, and may be different for each divided addition. At the time of each divided addition, an approximately equal amount of the mixture is added to the reaction system. Also good. For example, you may add, increasing the addition amount one by one. In the production method of the present invention, it is preferable to add a certain amount of the mixture each time.
- the raw material is added so that the primary synthesis reaction proceeds after waiting for the primary particles of dialkoxymagnesium produced in the reaction system to adhere to the dialkoxymagnesium already present in the system. It is preferable to add.
- the interval between divided additions varies depending on other conditions such as the size of the reactor and temperature, but is preferably 10 to 120 minutes. That is, it is preferable to add the next raw material at the stage where the dialkoxymagnesium is produced after the partial addition in the previous stage and the generation of H 2 is almost completed (the stage where almost no unreacted metallic magnesium remains). . It is preferable to add the next magnesium when the reaction of the added magnesium is almost completed.
- the ratio of metal magnesium to alcohol is added in a range of 1/4 to 1/25 by weight. It is preferable to do this. In order to carry out the reaction smoothly, it is preferable that metal magnesium is reacted in a relatively small amount of alcohol at the beginning of the reaction, and after all the metal magnesium is added, alcohol is further added to adjust the concentration.
- the interval at which the mixture is added in portions to the reaction system is not particularly limited, and can be appropriately adjusted in consideration of the amount and composition of the mixture added in portions. In the production method of the present invention, it is preferable to sequentially add at regular intervals.
- the D 50 value of the resulting magnesium alcoholate can be controlled by the addition interval of the mixture. For example, a magnesium alcoholate having a small particle size can be obtained by shortening the addition interval, and a magnesium alcoholate having a large particle size can be obtained by increasing the addition interval.
- the end point of the reaction can be judged by the end of the generation of hydrogen.
- the generation of hydrogen is completed and further aging is performed at 70 ° C. to solvent reflux temperature to stabilize the generated particles.
- This aging time can be appropriately changed depending on the particle size, particle size distribution and bulk specific gravity of the target magnesium alcoholate.
- the reaction temperature at the time of aging may be from 70 ° C. to the solvent reflux temperature, and the stirring speed is from 50 to 500 rpm. These reaction temperature and stirring speed depend on the particle size, particle size distribution and bulk specific gravity of the target magnesium alcoholate. You can choose. Specifically, the particle size of the magnesium alcoholate can be increased by decreasing the stirring speed (the moving speed of the reaction liquid), and the particle size can be decreased by increasing the stirring speed.
- magnesium alcoholate having a controlled particle size distribution, particle size, and particle type can be produced.
- D 50 particle size is in the range of 10 to 200 ⁇ m, particularly large particles of 80 to 200 ⁇ m that can eliminate the pelletization step when molding the olefin polymer produced when used as a polymerization catalyst.
- Granular magnesium alcoholate with a diameter can be produced.
- magnesium alcoholate can be produced as a granular material having a relatively uniform particle size distribution by the production method of the present invention.
- a magnesium alcoholate granule having a particle size distribution represented by (D 90 -D 10 ) / D 50 of 1 or less, more preferably less than 0.78 is obtained.
- the value of the particle size distribution can be made less than 1.
- the magnesium alcoholate of the present invention is a granular material having a spherical or ellipsoidal particle shape with a particle size distribution represented by (D 90 -D 10 ) / D 50 of less than 0.78.
- the average particle size represented by D 50 is less than 60 ⁇ m, and the particle size distribution represented by (D 90 -D 10 ) / D 50 is 1 or less. It is a granular material having an elliptical particle shape.
- the magnesium alcoholate of the present invention may be composed of a porous material in which primary particles of magnesium alcoholate having a particle diameter of 1 to 10 ⁇ m in the form of spheres, ellipsoids, scales or needles are agglomerated, and having a particle size. It is preferable that particles having a size of 10 ⁇ m or less are not substantially contained.
- the pores having a pore diameter of 0.1 to 5 ⁇ m observed in a TEM (transmission electron microscope) inside the granular material are composed of gaps between the particles generated when the primary particles are aggregated as described above. It appears to be. When the gap between the particles is 10 ⁇ m or more, the bond between the primary particles is weak, and the strength of the granular material may be insufficient.
- the magnesium alcoholate of the present invention is a granular material having a spherical or ellipsoidal particle shape with a narrow particle size distribution even if the particle size is small. For this reason, it can be suitably used as a solid catalyst component for olefin polymerization.
- a magnesium alcoholate dialkoxymagnesium granule
- a tetravalent titanium halide and an electron donating compound by a known method.
- a catalyst component is prepared, and an organoaluminum compound is allowed to act on the catalyst component.
- tetravalent titanium halides include titanium tetrachloride and alkoxy titanium halides.
- the electron donating compound include alcohols, ethers, esters, and organosilicon compounds such as alkoxysilanes.
- the aluminum compound include triethylaluminum and diethylaluminum chloride.
- Example 1 A 500 ml four-necked flask equipped with a stirrer was equipped with a reflux condenser connected with an integrating gas meter, a thermometer, a dropping funnel for ethanol, and a nitrogen inlet tube via a gas flow meter. After sufficiently purging the inside of the reaction system with nitrogen, 60 g of absolute ethanol (water 200 ppm) and 0.4 g of iodine were charged and dissolved. Into this, 6.1 g of metal magnesium (particle size: 300 to 149 ⁇ m) was charged, and the temperature was raised to the reflux temperature of the alcohol with an oil bath under stirring of 2.60 ⁇ 10 11 rpm 3 ⁇ mm 2 .
- the reaction was stabilized within 10 minutes after the metal magnesium was charged, and thereafter, every 10 minutes, 40 g of ethanol, 6.1 g of metal magnesium, and 0.3 g of iodine were charged in three portions and the reaction was continued.
- the total amount of metal magnesium charged was 24.4 g, and the amount of ethanol used at this point was 180 g.
- 183 g of ethanol of the same quality as that used previously was added dropwise over 1 hour and the aging reaction was continued until no hydrogen gas was detected in the exhaust gas, it took 8 hours in total from the first charge. did.
- the ethanol / metal magnesium ratio was 16/1.
- the liquid in the reaction system was dried under reduced pressure using a rotary evaporator to obtain 107 g (yield 94%) of magnesium ethylate.
- the obtained magnesium ethylate was observed with a scanning electron microscope (JSM-5300 manufactured by JEOL Datum Co., Ltd.) at an acceleration voltage of 20 kV and 1000 times.
- the particle surface was smooth, but the particle surface was smooth.
- the sphericity (S) determined from the photographed image was 1.01.
- the particle size distribution was measured using a laser diffraction particle size distribution measuring apparatus (HELOS & RODOS manufactured by SYMPATEC).
- Examples 2 to 7 The same procedure as in Example 1 was performed, except that the numerical values corresponding to the conditions used in Example 1 were changed to the numerical values shown in Table 1. The results are summarized in Table 2.
- Mg means magnesium
- I means iodine
- number of times” of “divided addition” means the number of divided additions.
- Example 8 A 500 ml four-necked flask equipped with a stirrer was equipped with a reflux condenser connected with an integrating gas meter, a thermometer, a dropping funnel for ethanol, and a nitrogen inlet tube via a gas flow meter. After sufficiently purging the inside of the reaction system with nitrogen, 100 g of absolute ethanol (water 200 ppm) and 0.6 g of iodine were charged and dissolved. Into this, 8.1 g of metal magnesium (particle size: 300 to 149 ⁇ m) was charged, and the temperature was raised to the reflux temperature of the alcohol in an oil bath with stirring.
- Example 9 A 500 ml four-necked flask equipped with a stirrer was equipped with a reflux condenser connected with an integrating gas meter, a thermometer, a dropping funnel for ethanol, and a nitrogen inlet tube via a gas flow meter. The reaction system was sufficiently purged with nitrogen, and then 60 g of absolute ethanol (water 200 ppm) and 0.4 g of iodine were charged and dissolved. Into this, 6.1 g of metal magnesium (particle size: 210 to 149 ⁇ m) was charged, and the temperature was raised to the reflux temperature of the alcohol in an oil bath with stirring.
- Example 10 to 27 The same operation as in Example 1 was performed except that the numerical values corresponding to the conditions used in Example 1 were changed to the numerical values shown in Table 3. The results are summarized in Table 4.
- the amount of ethanol used was 183 g at the time of charging and 120 g at the time of each divided addition.
- the amount of ethanol at the time when all the charging was completed was 543 g, and an additional 549 g was added for dilution. did.
- the obtained particles had a D 50 of 46.69 ⁇ m, a D 10 of 24.23 ⁇ m, a D 90 of 70.87 ⁇ m, a particle size distribution of 0.999 and a wide distribution.
- the bulk specific gravity (slackness) was as small as 0.203 g / ml.
- the magnesium alcoholate production method of the present invention By using the magnesium alcoholate production method of the present invention, an unprecedented quality magnesium alcoholate with controlled particle size distribution, particle size, and particle shape can be obtained.
- a catalyst for olefin polymerization using the magnesium alcoholate obtained by this method an olefin polymer having a controlled particle size distribution, particle size, and particle type can be obtained. From the above, the present invention is extremely useful industrially.
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Abstract
Description
本願は、2011年10月19日に日本に出願された、特願2011-229527号に基づき優先権を主張し、その内容をここに援用する。
また、特許文献2においては、分割回数は5~10回程度が好適であると記載されているが、アルコールを最初から全量投入しておき、金属マグネシウムを数回に分割して投入する方法が好ましいと記載されている。
さらに、特許文献1及び2のいずれにおいても、どのように分割添加すべきか、分割して添加する各原料の最適な比率等の具体的な分割添加方法については、記載も示唆もされていない。
本発明は、粒径が小さくても、粒度分布が狭く、球状又は楕円体形状のマグネシウムアルコラートを提供することを目的とする。
本発明のマグネシウムアルコラートの製造方法においては、前記混合物を分割添加する回数を10回未満とすることが好ましく、分割添加される前記混合物中の金属マグネシウムとアルコールの質量比、及び金属マグネシウムとハロゲン又はハロゲン原子含有化合物との質量比を、分割添加ごとに略一定にするのが好ましく、さらに分割添加する間隔を一定にするのが好ましい。
すなわち、当該製造方法により、(D90-D10)/D50で示される粒度分布が0.78未満である、球状又は楕円体の粒子形状を有する粒状物のマグネシウムアルコラート、又は、D50で示される平均粒径が60μm未満であり、(D90-D10)/D50で示される粒度分布が1以下である、球状又は楕円体の粒子形状を有する粒状物であるマグネシウムアルコラートを製造することができる。
当該方法によって得られた粒度分布、粒径、及び粒型が制御されたマグネシウムアルコラートを用いてオレフィン重合用触媒を調製することにより、粒度分布、粒径、及び粒型が制御されたオレフィン重合体を得ることができる。
本発明のマグネシウムアルコラートの製造方法(本発明の製造方法)は、金属マグネシウムと、アルコールと、ハロゲン又はハロゲン原子含有化合物の少なくとも一方とを、アルコール還流下の反応系に分割添加して反応させるマグネシウムアルコラートの製造方法において、金属マグネシウムと、アルコールと、ハロゲン又はハロゲン原子含有化合物の少なくとも一方との混合物を、分割添加毎に反応系に添加することを特徴とする。
また、製造されるマグネシウムアルコラートの平均粒径を60μm以上にするためには、粒径が500μm以下の金属マグネシウムの粒状物を使用することが好ましく、D50で示される平均粒径が50~500μmであり、(D90-D10)/D50で示す粒度分布が2以下の微粒子からなる金属マグネシウムの粒状物を使用することがより好ましい。当該粒状物の形状は、粉末状であってもよい。
アルコールの純度及び含水量も限られないが、含水量が少ないものであることが好ましい。具体的には、含水量が1%以下のアルコールを用いることが好ましく、含水量が2000ppm以下のアルコールを用いることがより好ましい。含水量が多いアルコールを用いた場合には、金属マグネシウム表面に水酸化マグネシウムが生成されやすい傾向にある。更に、より良好なモルフォロジーを有するマグネシウムアルコラートを得るためには、アルコール中の水分は少なければ少ないほど好ましく、一般的には、200ppm以下が望ましい。
例えば、添加量を順次増加させながら添加してもよい。本発明の製造方法においては、毎回一定量の混合物を添加することが好ましい。
尚、反応をスムーズに行うために、反応初期に、金属マグネシウムを比較的少ないアルコール中で反応させ、すべての金属マグネシウムを添加後に、さらにアルコールを追加して濃度調整をするのが好ましい。
前記混合物の添加間隔により、得られるマグネシウムアルコラートのD50値を制御することができる。例えば、添加間隔を短くすることで小さな粒径のマグネシウムアルコラートを、添加間隔を長くすることで大きな粒径のマグネシウムアルコラートを、それぞれ得ることができる。
前記混合物の最後の添加の後、水素の発生が終了してからさらに70℃~溶媒還流温度下に熟成を行い、生成粒子の安定化を図ることが好ましい。この熟成時間は、目的とするマグネシウムアルコラートの粒径、粒度分布や嵩比重によって適宜に変更することができる。熟成時の反応温度は70℃~溶媒還流温度であってよく、撹拌速度は50~500rpmであり、これらの反応温度、撹拌速度は、目的とするマグネシウムアルコラートの粒径、粒度分布や嵩比重によって選択することができる。
具体的には、攪拌速度(反応液の移動速度)を下げることで、マグネシウムアルコラートの粒径を大きくすることができ、上げることで粒径を小さくすることができる。
本発明の製造方法により、粒度分布、粒径、及び粒型が制御されたマグネシウムアルコラートを製造することができる。例えば、D50粒径が10~200μmの範囲である粒状物、特に重合触媒に利用した際に生成するオレフィン重合体の成形の際のペレット化工程を省略できるような、80~200μmの大粒径の粒状物のマグネシウムアルコラートを製造することができる。
また、本発明の製造方法により、比較的均一な粒径の分布の粒状物として、マグネシウムアルコラートを製造することができる。例えば、(D90-D10)/D50で示される粒度分布が1以下、より好ましくは0.78未満であるマグネシウムアルコラートの粒状物が得られる。特に、D50粒径が60μm未満であっても、前記粒度分布の値を1未満にすることができる。
撹拌機付き500ml四つ口フラスコに、積算型ガスメーターを接続した還流コンデンサー、温度計、エタノール用滴下ロート、並びにガス流量計を経由した窒素導入管を設置した。この反応系内を充分に窒素置換を行った後、無水エタノール(水分200ppm)60g、ヨウ素0.4gを仕込んで溶解させた。この中に金属マグネシウム6.1g(粒度300~149μm)を仕込み、撹拌強度2.60×1011rpm3・mm2の撹拌下、オイルバスにてアルコールの還流温度まで昇温を行った。金属マグネシウムの仕込みから10分以内に反応は安定化し、以降10分毎に1回当たりエタノール40g、金属マグネシウム6.1g、ヨウ素0.3gを3回に分けて仕込んで反応を継続した。金属マグネシウムの仕込み全量は24.4g、この時点でのエタノールの使用量は180gであった。さらに、先に用いたものと同品質のエタノール183gを1時間かけて滴下し、熟成反応を、排ガス中に水素ガスが検出されなくなるまで続行したところ、最初の仕込みから通算して8時間を要した。
エタノール/金属マグネシウム比(反応系に仕込んだエタノール全量と金属マグネシウム全量の質量比)は、16/1になった。反応終了後、反応系内の液をロータリーエバポレーターにて減圧乾燥し、107g(収率94%)のマグネシウムエチラートを得た。得られたマグネシウムエチラートを走査型電子顕微鏡(日本電子データム(株)製JSM-5300)にて、加速電圧20kV、1000倍で観察した結果、亜球状の粒子であって、一粒子は細片状のものが密に重なり合ってできているが粒子表面は滑らかであった。撮影した写真より球形度(S)を求めると1.01であった。粒度分布は、レーザー回折式粒度分布測定装置(SYMPATEC社製HELOS&RODOS)を用いて測定したところ、D50が40.98μm、D10が25.14μm、D90が55.58μmであり、粒度分布が0.743の分布幅の狭いものであった。また、嵩比重(ゆるみ)(見かけ比重)の測定結果は0.301g/mlであった。以上の結果をまとめて表2に示す。
実施例1で使用された各条件に対応する数値を表1に記載の数値に変更する以外、実施例1と同様に行った。その結果を表2にまとめて示す。表1中、「Mg」はマグネシウム、「I」はヨウ素、「分割添加」の「回数」は分割添加の回数を、それぞれ意味する。
撹拌機付き500ml四つ口フラスコに、積算型ガスメーターを接続した還流コンデンサー、温度計、エタノール用滴下ロート、並びにガス流量計を経由した窒素導入管を設置した。この反応系内を充分に窒素置換を行った後、無水エタノール(水分200ppm)100g、ヨウ素0.6gを仕込んで溶解させた。この中に金属マグネシウム8.1g(粒度300~149μm)を仕込み、撹拌下オイルバスにてアルコールの還流温度まで昇温を行った。金属マグネシウムの仕込みから10分以内に反応は安定化したため、金属マグネシウムの仕込み時点から10分後にエタノール10g、金属マグネシウム4.1g、ヨウ素0.3gを追加添加し、さらに10分後に、エタノール40g、金属マグネシウム7.1g、ヨウ素0.2gを追加添加し、さらに10分後に、エタノール30g、金属マグネシウム5.1g、ヨウ素0.1gを追加添加し、3回に分けて仕込んで反応を継続した。金属マグネシウムの仕込み全量は24.4g、この時点でのエタノールの使用量は180gであった。さらに先に用いたものと同品質のエタノール183gを1時間かけて滴下し、熟成反応を、排ガス中に水素ガスが検出されなくなるまで続行したところ、最初の仕込みから通算して5時間を要した。
エタノール/金属マグネシウム比は、15/1になった。反応終了後、反応系内の液をロータリーエバポレーターにて減圧乾燥し、105g(収率92.1%)のマグネシウムエチラートを得た。粒度分布を実施例1と同様にして測定したところ、D50が48.34μm、D10が36.36μm、D90が60.12μmであり、粒度分布が0.492の分布幅の狭いものであった。また、嵩比重(ゆるみ)の測定結果は0.288g/mlであった。
撹拌機付き500ml四つ口フラスコに、積算型ガスメーターを接続した還流コンデンサー、温度計、エタノール用滴下ロート、並びにガス流量計を経由した窒素導入管を設置した。この反応系内を充分に窒素置換を行った後、無水エタノール(水分200ppm)60g、ヨウ素0.4gを仕込んで溶解させた。この中に金属マグネシウム6.1g(粒度210~149μm)を仕込み、撹拌下オイルバスにてアルコールの還流温度まで昇温を行った。金属マグネシウムの仕込みから10分以内に反応は安定化したため、金属マグネシウムの仕込み時点から10分後にエタノール40g、金属マグネシウム6.1g、ヨウ素0.3gを追加添加し、さらに15分後に、エタノール40g、金属マグネシウム6.1g、ヨウ素0.3gを追加添加し、さらに5分後に、エタノール40g、金属マグネシウム6.1g、ヨウ素0.3gを追加添加し、3回に分けて仕込んで反応を継続した。
金属マグネシウムの仕込み全量は24.4g、この時点でのエタノールの使用量は180gであった。さらに、先に用いたものと同品質のエタノール183gを1時間かけて滴下し、熟成反応を、排ガス中に水素ガスが検出されなくなるまで続行したところ、最初の仕込みから通算して5時間を要した。
エタノール/金属マグネシウム比は、15/1になった。反応終了後、反応系内の液をロータリーエバポレーターにて減圧乾燥し、107g(収率93.8%)のマグネシウムエチラートを得た。粒度分布を実施例1と同様にして測定したところ、D50が57.1μm、D10が43.03μm、D90が71.06μmであり、粒度分布が0.491の分布幅の狭いものであった。また、嵩比重(ゆるみ)の測定結果は0.319g/mlであった。
実施例1で使用された各条件に対応する数値を表3に記載の数値に変更する以外、実施例1と同様に行った。その結果を表4にまとめて示す。
実施例17において、使用するエタノールの量は、仕込み時で183g、各分割添加時において120gずつであり、全ての仕込みが終了した時点でのエタノール量は543gであり、希釈用としてさらに549gを添加した。
実施例1と同一装置を使用し、無水エタノール181g、ヨウ素1.3g、金属マグネシウム24.4g(350~210μm)を仕込み、アルコール還流下まで昇温して反応を開始させた。熟成反応を5時間行って、反応を完結させた。乾燥して得られた粒子は、球形度(S)が1.25であり、D50が46.69μmであり、D10が24.23μmであり、D90が70.87μmであり、粒度分布は0.999と広く、粒子表面が密でなく、凸凹が多く見られる球形度にやや欠けるものであった。また、嵩比重(ゆるみ)は0.203g/mlであった。
500mlの四つ口丸底フラスコに、撹拌装置、滴下ロート、温度計をとりつけ、まずは窒素気流下に、エタノール61g、ヨウ素1.3g、粒状の金属マグネシウム6.1gを仕込み、バス温80℃で加熱還流した。10分後に、エタノール40g、金属マグネシウム6.1gを追加添加し、さらに10分後、エタノール40g、金属マグネシウム6.1gを追加添加し、さらに10分後、エタノール40g、マグネシウム6.1gを追加添加し、さらに10分後にエタノール185gを1時間かけて滴下し、熟成を5時間行って、反応を完結させた。その後、室温まで冷却後、エタノールを減圧留去し、乾燥させて、目的とするマグネシウムエチラート79.9g(収率75.9%)を得ることができた。
得られた粒子のD50は46.69μmであり、D10は24.23μmであり、D90は70.87μmであり、粒度分布は0.999で分布が広いものが得られた。嵩比重(ゆるみ)は0.203g/mlと小さい値となった。
当該方法によって得られたマグネシウムアルコラートを用いてオレフィン重合用触媒を調製することにより、粒度分布、粒径、及び粒型が制御されたオレフィン重合体を得ることができる。以上のことから、本発明は産業上極めて有用である。
Claims (7)
- 金属マグネシウムと、アルコールと、ハロゲン又はハロゲン原子含有化合物の少なくとも一方とを、アルコール還流下の反応系に分割添加して反応させるマグネシウムアルコラートの製造方法において、
金属マグネシウムと、アルコールと、ハロゲン又はハロゲン原子含有化合物の少なくとも一方との混合物を、分割添加毎に反応系に添加することを特徴とするマグネシウムアルコラートの製造方法。 - 前記混合物を分割添加する回数が、10回未満であることを特徴とする請求項1に記載のマグネシウムアルコラートの製造方法。
- 分割添加される前記混合物中の金属マグネシウムとアルコールの質量比、及び金属マグネシウムとハロゲン又はハロゲン原子含有化合物との質量比を、分割添加ごとに略一定にすることを特徴とする請求項1又は2に記載のマグネシウムアルコラートの製造方法。
- 前記混合物を分割添加する間隔を一定にすることを特徴とする請求項1~3のいずれか一項に記載のマグネシウムアルコラートの製造方法。
- 金属マグネシウム1グラム原子に対し、0.0001グラム原子以上の量のハロゲン又はハロゲン原子含有化合物を反応させることを特徴とする請求項1~4のいずれか一項に記載のマグネシウムアルコラートの製造方法。
- (D90-D10)/D50で示される粒度分布が0.78未満である、球状又は楕円体の粒子形状を有する粒状物であることを特徴とするマグネシウムアルコラート。
- D50で示される平均粒径が60μm未満であり、(D90-D10)/D50で示される粒度分布が1以下である、球状又は楕円体の粒子形状を有する粒状物であることを特徴とするマグネシウムアルコラート。
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- 2012-10-12 CN CN201280050513.2A patent/CN103874674A/zh active Pending
- 2012-10-12 WO PCT/JP2012/076502 patent/WO2013058193A1/ja active Application Filing
- 2012-10-12 US US14/350,259 patent/US9493586B2/en active Active
- 2012-10-12 KR KR1020167006791A patent/KR101786406B1/ko active IP Right Grant
- 2012-10-12 KR KR1020147009487A patent/KR20140061508A/ko not_active Application Discontinuation
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CZ304987B6 (cs) * | 2013-08-06 | 2015-03-11 | Fyzikální ústav AV ČR, v.v.i. | Způsob výroby methoxidu hořečnatého reakcí hořčíku a methanolu za použití zinku jako katalyzátoru |
WO2019151483A1 (ja) * | 2018-02-01 | 2019-08-08 | 東邦チタニウム株式会社 | アルコキシマグネシウムの製造方法およびアルコキシマグネシウム |
JPWO2019151483A1 (ja) * | 2018-02-01 | 2021-01-28 | 東邦チタニウム株式会社 | アルコキシマグネシウムの製造方法およびアルコキシマグネシウム |
JP2020111631A (ja) * | 2019-01-08 | 2020-07-27 | 東邦チタニウム株式会社 | ジアルコキシマグネシウムの製造方法、オレフィン類重合用固体触媒成分、オレフィン類重合用固体触媒、及びオレフィン類重合体の製造方法 |
JP7324584B2 (ja) | 2019-01-08 | 2023-08-10 | 東邦チタニウム株式会社 | ジアルコキシマグネシウムの製造方法、オレフィン類重合用固体触媒成分の製造方法、オレフィン類重合用触媒の製造方法及びオレフィン類重合体の製造方法 |
WO2020217628A1 (ja) | 2019-04-25 | 2020-10-29 | 住友化学株式会社 | プロピレン重合体の製造方法 |
DE102021104360A1 (de) | 2020-03-31 | 2021-09-30 | Sumitomo Chemical Company, Limited | Feste katalysatorkomponente für olefinpolymerisation |
WO2022091867A1 (ja) | 2020-10-28 | 2022-05-05 | 東邦チタニウム株式会社 | オレフィン類重合用固体触媒成分、オレフィン類重合用固体触媒成分の製造方法、オレフィン類重合用触媒、オレフィン類重合体粒子の製造方法およびオレフィン類重合体粒子 |
EP4155324A2 (en) | 2021-09-22 | 2023-03-29 | Sumitomo Chemical Company, Limited | Method for producing solid catalyst component for olefin polymerization, method for producing catalyst for olefin polymerization, and method for producing olefin polymer |
EP4212557A2 (en) | 2022-01-14 | 2023-07-19 | Sumitomo Chemical Company, Limited | Heterophasic propylene polymerization material and olefin polymer |
Also Published As
Publication number | Publication date |
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EP2754648A4 (en) | 2015-05-13 |
BR112014009177A8 (pt) | 2017-06-20 |
EP2754648A1 (en) | 2014-07-16 |
US20140243190A1 (en) | 2014-08-28 |
CN103874674A (zh) | 2014-06-18 |
US9493586B2 (en) | 2016-11-15 |
JP5753587B2 (ja) | 2015-07-22 |
IN2014CN02661A (ja) | 2015-07-03 |
KR20160032279A (ko) | 2016-03-23 |
JPWO2013058193A1 (ja) | 2015-04-02 |
US20170022130A1 (en) | 2017-01-26 |
BR112014009177B1 (pt) | 2024-02-06 |
KR20140061508A (ko) | 2014-05-21 |
EP2754648B1 (en) | 2018-06-13 |
BR112014009177A2 (pt) | 2017-06-13 |
KR101786406B1 (ko) | 2017-10-17 |
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