RussianPatents.com

Method of obtaining modified titanium-magnesium nanocatalyst

IPC classes for russian patent Method of obtaining modified titanium-magnesium nanocatalyst (RU 2486956):
Another patents in same IPC classes:
Method of producing suspension-type anti-turbulence additive for reducing hydrodynamic resistance of hydrocarbon liquids / 2481357
Invention relates to pipeline transportation of liquid hydrocarbons and specifically to methods of reducing hydrodynamic resistance of said liquids. Described is a method of producing a suspension-type anti-turbulence additive. The method involves producing a fine-grained polymer which is soluble in carbonaceous liquids. The polymer is synthesised by (co)polymerisation of higher α-olefins under the action of a Ziegler-Natta catalyst. The (co)polymer of higher α-olefins used is a casting polymerisation product. A fine dispersion of the polymer is obtained by thermal re-precipitation of the polymer in a liquid which is a nonsolvent for the polymer at room temperature and capable of dissolving it at a higher temperature.
Method of preparing titanium catalyst for stereospecific polymerisation of isoprene / 2479351
Invention relates to petrochemical industry. Described is a method of preparing a titanium catalyst for stereospecific polymerisation of isoprene in the presence of a catalyst system TiCl4-Al(i-C4H9)3-diphenyloxide-piperylene by mixing toluene solutions of titanium tetrachloride, which contains phenyl oxide, and triisobutylaluminium, which contains piperylene, in molar ratio of the titanium and aluminium components of the catalyst to diphenyl oxide and piperylene of 1:0.15, at temperature of (-20)-(-10)°C, followed by circulation of the catalyst on an outer loop with collection of isoprene for polymerisation, wherein a small tubular turbulent reactor with a diffuser-confusor design is mounted at the step for circulation on the outer mixing loop.
Method of producing copolymers of olefin monomers with cyclic or linear dienes Method of producing copolymers of olefin monomers with cyclic or linear dienes / 2477289
Invention relates to a method of producing olefin/diene copolymers on a homogeneous metallocene catalyst system. Described is a method of producing copolymers of monomers by polymerisation of olefins or a mixture of olefins and linear or cyclic dienes in the presence of a homogeneous catalyst system. The catalyst system consists of dialkyl bridged bis-indenyl metallocene complexes of group IVB metals and aluminium trialkyls.
Olefin polymerisation catalyst and method for polymerisation of olefin using said catalyst Olefin polymerisation catalyst and method for polymerisation of olefin using said catalyst / 2469046
Catalyst contains an organic compound of formula 1, an organometallic compound of formula 2, an organic transition metal compound of formula 3 and aluminoxane. Formula 1: R1-H or R1-Q-R1, where R1 is a cyclic hydrocarbyl group containing 5-30 carbon atoms and at least 2 conjugated double bonds, and can be unsubstituted or can contain 1-6 substitutes which are selected from alkyl groups containing 1-20 carbon atoms; Q is a divalent group for bridging groups R1, which is a (CR52)b group, where the substitute R5 is a hydrogen atom, b is an integer from 1 to 4. Formula 2: M1R2mR3nR4pR6q, where M1 is an element selected from a group consisting of group 1 and 2 elements, R2, R3, R4 and R6 independently denote a hydrocarbyl group containing 1-24 carbon atoms, m, n, p and q are independently equal to 0 or 1, and the sum m+n+p+q is equal to the valence of M1. Formula 3: M2R7rXs, where M2 is titanium (Ti), zirconium (Zr) or hafnium (Hf), R7 is as defined for R1, X is a halogen atom, r is equal to 0 or 1, s is equal to 3 or 4, and the sum r+s is equal to the valence of metal M2. A method for polymerising olefin is also provided.
Catalyst for polymerisation and copolymerisation of ethylene, preparation method thereof and method of producing polyethylenes using said catalyst Catalyst for polymerisation and copolymerisation of ethylene, preparation method thereof and method of producing polyethylenes using said catalyst / 2462479
Catalyst contains tetracyclopentadienyl zirconium (C5H5)4Zr, aluminoxane, a polyalkyl derivative of a nontransition metal MtRn, where Mt is a group IIA-IVA nontransition metal, and R = CH3, C2H5, C3H7, C4H9, iso-C4H9, C8H17; and/or titanium tetraalkoxide. The catalyst can have a support selected from a group comprising silica gel, ash from burning rice husks, kaolin or diatomite. The catalyst is biphase and contains a solid and liquid phase. The solid phase is metallocene and aluminoxane pre-deposited on the support, and the liquid phase is a solution of titanium tetraalkoxide in an aliphatic or aromatic solvent. Medium- or low-density polyethylenes are obtained in the presence of said catalyst. Medium and low-density polyethylene with given molecular weight, molecular-weight distribution and branching is obtained by varying the molar ratio titanium alkoxide/metallocene and MtRn/metallocene in the catalyst.
Catalytic system and method of producing reactor powder of ultrahigh-molecular-weight polyethylene for ultrahigh-strength ultrahigh-modulus articles via cold forming Catalytic system and method of producing reactor powder of ultrahigh-molecular-weight polyethylene for ultrahigh-strength ultrahigh-modulus articles via cold forming / 2459835
Invention relates to synthesis of ultrahigh-molecular-weight polyethylene (UHMWPE) with a special morphology and making ultrahigh-strength and high-modulus fibres and belts for making ropes, nets, helmets, body armour and other protective materials therefrom. Described is a catalytic system based on oxyallyl group-functionalised bis-(phenoxy-imine) complexes of titanium chloride with the general structure I-II, to obtain reactor powder of UHMWPE, which can be processed into ultrahigh-modulus ultrahigh-strength fibres and belts via cold forming, having the following structure: , where (I) R1-tBu, R2-CH3O; (II) R1 - isopropylbenzyl, R2-CH3. The ethylene polymerisation method is carried out in the presence of said catalytic system. The invention also relates to a method for cold forming the reactor powder of UHMWPE, obtained from polymerisation of ethylene in the presence of a catalytic system having the following structure: , where (I) R1-tBu, R2-CH3O; (II) R1 - isopropylbenzyl, R2-CH3; (IV) R1 - isopropylbenzyl, R2-H.
Metallocene catalysts and use thereof in polymerisation processes Metallocene catalysts and use thereof in polymerisation processes / 2455316
Invention relates to a method of polymerising olefin(s) to obtain polymers with improved film turbidity in the presence of cyclotetramethylene silyl (tetramethylcyclopentadienyl)(cyclopentadienyl) zirconium dimethyl, activated with an activator, on a support. Also disclosed is a method of improving polymer film turbidity comprising the following steps: a) obtaining a polymer via polymerisation of ethylene, olefin monomer containing 3-8 carbon atoms, and optionally one or more other olefin monomers containing 2-30 carbon atoms, in the presence of a catalyst system - metallocene, LA(R'SiR')LBZrQ2, activated with an activator deposited on a support; b) mixing the polymer obtained at step (a) with another polymer containing olefin monomers containing 2-30 carbon atoms.
Preparation of catalyst paste for olefin polymerisation Preparation of catalyst paste for olefin polymerisation / 2448985
Present invention relates to a method of producing a catalyst composition in form of catalyst particles dispersed in a semi-liquid matrix. Described is a method of producing a catalyst composition for polymerisation of olefins in form of a dispersion of catalyst particles in a semi-liquid matrix, characterised by that said method comprises steps for: forming a suspension of catalyst particles in oil by loading, while stirring continuously, dry catalyst powder into a tank containing said oil, wherein the rate of loading the catalyst powder per metre of the oil boundary surface is less than 800 kg/h*m2; adding, while stirring, molten thickener having melting point ranging from 30 to 70°C, while holding the catalyst suspension in oil at such a temperature that said thickener solidifies upon contact with said suspension, wherein said oil has dynamic viscosity at 100°C ranging from 1 to 12 cP, and said catalyst particles fed into the tank at step a) are Ziegler-Natta catalyst components based on a titanium halide deposited on a magnesium halide. Described also is an olefin polymerisation method, which is realised in the presence of a solid polymerisation catalyst, wherein said solid polymerisation catalyst is treated and transferred into a polymerisation reactor through the following steps for: a) forming a suspension of catalyst particles in oil by loading, while stirring continuously, dry catalyst powder into a tank containing said oil, wherein the rate of loading the catalyst powder per m2 of the oil boundary surface is less than 800 kg/h*m2; b) adding, while stirring, molten thickener having melting point ranging from 30°C to 70°C, while holding the catalyst suspension in oil at such a temperature that said thickener solidifies upon contact with said suspension; c) the catalyst paste from step b) is brought into contact with an organoaluminium compound in the presence of an inert hydrocarbon, possibly an electron-donor compound, at temperature from 5°C to 30°C; d) polymerisation of one or more α-olefins of formula CH2=CHR, where R denotes hydrogen or a hydrocarbon radical having 1-12 carbon atoms, in one or more polymerisation reactors in the presence of the catalyst from step c), wherein said oil has dynamic viscosity at 100°C ranging from 1 to 12 cP, and said catalyst particles which are fed into the tank at step a) are Ziegler-Natta catalyst components based on a titanium halide deposited on a magnesium halide.
Method of the butadiene polymerization catalytic system production and the method of the 1.4-cis-polybutadiene production / 2442653
Invention relates to the method of production of the butadiene polymerization catalytic system; the method describes the production of the butadiene polymerization catalytic system by means on interaction of tris-[bis-(2-ethylhexyl) phosphate] neodymium, butadiene, diisobutylaluminiumhydride, the chlorinating agent in the fluid of the inert solution followed by the formation of the catalytic system whereat the chlorinating agent is represented by the reaction product of aluminum triethyl with ethylaluminiumseqichloride upon the proportion of the powdered components regarding aluminum 1:2 at the temperature 20-50°C; the method describes the production of 1.4-cis-polybutadiene by means of the butadiene polymerization in the hydrocarbonic inert solvent in the presence of the above catalytic system.
Method of producing titanium-magnesium nanocatalyst for (co) / 2425059
Described is a method of producing a titanium-magnesium nanocatalyst through reaction of magnesium with titanium tetrachloride in the presence of n-butyl chloride. Content of butyl chloride is equal to 6.0-8.7 ml per 1 g or magnesium. Volume ratio of titanium tetrachloride to n-butyl chloride is equal to 1:(47-67).
Catalyst composition with mixed selectivity control agent and polymerisation method using said composition Catalyst composition with mixed selectivity control agent and polymerisation method using said composition / 2486208
Invention relates to Ziegler-Natta catalysts. Described is a catalyst composition containing: Ziegler-Natta procatalyst composition containing titanium, magnesium and an internal electron donor, containing at least two oxygen-containing functional groups, the oxygen-containing functional groups being separated by at least one saturated C2-C10 hydrocarbon chain which can optionally contain a heteroatom; organoaluminium compounds as a cocatalyst; and a mixed external electron donor (M-EED) comprising an activity limiting agent (ALA), a first selectivity control agent (SCA1) containing an alkoxysilane, a second selectivity control agent (SCA2) selected from a group consisting of an alkoxysilane, a diether, and a dialkoxybenzene, wherein the molar ratio SCA1:SCA2 ranges from 0.1:1 to 1.0:1, the molar ratio of total-SCA to ALA is less than 1.0, and wherein the ALA is selected from a group consisting of an aromatic ester or a derivative thereof, an aliphatic ester or a derivative thereof, a diether, poly(alkylene glycol) of an ester and combinations thereof.
Method of producing suspension-type anti-turbulence additive for reducing hydrodynamic resistance of hydrocarbon liquids / 2481357
Invention relates to pipeline transportation of liquid hydrocarbons and specifically to methods of reducing hydrodynamic resistance of said liquids. Described is a method of producing a suspension-type anti-turbulence additive. The method involves producing a fine-grained polymer which is soluble in carbonaceous liquids. The polymer is synthesised by (co)polymerisation of higher α-olefins under the action of a Ziegler-Natta catalyst. The (co)polymer of higher α-olefins used is a casting polymerisation product. A fine dispersion of the polymer is obtained by thermal re-precipitation of the polymer in a liquid which is a nonsolvent for the polymer at room temperature and capable of dissolving it at a higher temperature.
Controlling branching level and viscosity of poly-alpha-olefins by adding propene Controlling branching level and viscosity of poly-alpha-olefins by adding propene / 2480482
Invention relates to a poly-alpha-olefin obtained from a decene and propene and having a branching level greater than 19% and to a method of producing such poly-alpha-olefins. The decene is 1-decene. Described is a method of producing a poly-alpha-olefin from at least two monomers, where two monomers include decene and propene. Polymerisation takes place in the presence of a metallocene catalyst Ph2C(Cp-9-Flu)ZrCl2 and an aluminoxane cocatalyst. Described also is a method which involves steps, among others, of providing correlation between the total amount of propene used to form poly-alpha-olefin and at least one of the characteristics of the poly-alpha-olefin: the branching level or viscosity of the poly-alpha-olefin.
Method of preparing titanium catalyst for stereospecific polymerisation of isoprene / 2479351
Invention relates to petrochemical industry. Described is a method of preparing a titanium catalyst for stereospecific polymerisation of isoprene in the presence of a catalyst system TiCl4-Al(i-C4H9)3-diphenyloxide-piperylene by mixing toluene solutions of titanium tetrachloride, which contains phenyl oxide, and triisobutylaluminium, which contains piperylene, in molar ratio of the titanium and aluminium components of the catalyst to diphenyl oxide and piperylene of 1:0.15, at temperature of (-20)-(-10)°C, followed by circulation of the catalyst on an outer loop with collection of isoprene for polymerisation, wherein a small tubular turbulent reactor with a diffuser-confusor design is mounted at the step for circulation on the outer mixing loop.
Method of preparing titanium catalyst for stereospecific polymerisation of isoprene / 2479351
Invention relates to petrochemical industry. Described is a method of preparing a titanium catalyst for stereospecific polymerisation of isoprene in the presence of a catalyst system TiCl4-Al(i-C4H9)3-diphenyloxide-piperylene by mixing toluene solutions of titanium tetrachloride, which contains phenyl oxide, and triisobutylaluminium, which contains piperylene, in molar ratio of the titanium and aluminium components of the catalyst to diphenyl oxide and piperylene of 1:0.15, at temperature of (-20)-(-10)°C, followed by circulation of the catalyst on an outer loop with collection of isoprene for polymerisation, wherein a small tubular turbulent reactor with a diffuser-confusor design is mounted at the step for circulation on the outer mixing loop.
Method of producing copolymers of olefin monomers with cyclic or linear dienes Method of producing copolymers of olefin monomers with cyclic or linear dienes / 2477289
Invention relates to a method of producing olefin/diene copolymers on a homogeneous metallocene catalyst system. Described is a method of producing copolymers of monomers by polymerisation of olefins or a mixture of olefins and linear or cyclic dienes in the presence of a homogeneous catalyst system. The catalyst system consists of dialkyl bridged bis-indenyl metallocene complexes of group IVB metals and aluminium trialkyls.
Method of producing high-fluidity propylene polymers Method of producing high-fluidity propylene polymers / 2471811
Invention relates to a method of producing propylene polymers. The obtained propylene polymer has melt flow rate (230°C, 2.16 kg) higher than 30 g/10 min. The method is realised in the presence of a catalyst system comprising (a) a solid catalyst component containing Mg, Ti, halogen and an electron donor compound selected from succinates; (b) an alkylaluminium cocatalyst; and (c) a silicon compound of formula R1Si(OR)3, in which R1 is a branched alkyl and R is independently a C1-C10 alkyl. A method of producing a propylene polymer composition and heterophase compositions is also described.
Thermoplastic polyolefins with high fluidity and excellent surface quality, obtained in multistep process Thermoplastic polyolefins with high fluidity and excellent surface quality, obtained in multistep process / 2470963
Invention provides reactor thermoplastic polyolefins having high fluidity and excellent surface quality, which contain (A) a matrix of a propylene homo- or copolymer whose weight ratio ranges from 40 to 90% with ISO 1133 MFR index (230°C, nominal load of 2.16 kg)≥200 g/10 min, and (B) an elastomeric copolymer of ethylene and propylene whose weight ratio ranges from 2 to 30%, with characteristic viscosity of IV (according to ISO 1628 in decalin as a solvent)≤2.8 dl/g with weight ratio of ethylene ranging from more than 50 to 80% and (C) an elastomeric copolymer of ethylene and propylene whose weight ratio ranges from 8 to 30%, with characteristic viscosity IV (according to ISO 1628 in decalin as a solvent) ranging from 3.0 to 6.5 dl/g and with weight content of propylene ranging from 50 to 80%. The reactor thermoplastic polyolefins are obtained in a process by multistep polymerisation, involving at least 3 successive steps, in the presence of a catalyst comprising (i) a Ziegler-Natta procatalyst which contains a product of transesterification of a lower alcohol and a phthalic ester of complex acids, (ii) an organometallic cocatalyst and (iii) an external donor of formula (I), Si(OCH2CH3)3(NR1R2), where values of R1 and R2 are given in the claim. The invention also discloses a multistep process of producing said polyolefins, involving either a combination of one loop reactor and two or three gas-phase reactors, or a combination of two loop reactors and two gas-phase reactors, connected in series. Disclosed polyolefins are used to produce articles for the automobile industry by pressure casting. The invention also relates to articles moulded from the reactor thermoplastic polyolefins.
Self-limiting catalyst system with controlled aluminium to sca ratio and method Self-limiting catalyst system with controlled aluminium to sca ratio and method / 2470947
Catalyst composition contains: one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and one or more internal electron donors in form of esters of aromatic dicarboxylic acid, one or more aluminium-containing cocatalysts and a selectivity control agent (SCA) which contains a mixture of (i) a first alkoxy silane and a second alkoxy silane and (ii) an ester of C4-C30-aliphatic acid, and the molar ratio of aluminium to total SCA ranges from 0.5:1 to 4:1.
Self-limiting catalyst system with controlled aluminium to sca ratio and method Self-limiting catalyst system with controlled aluminium to sca ratio and method / 2470947
Catalyst composition contains: one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and one or more internal electron donors in form of esters of aromatic dicarboxylic acid, one or more aluminium-containing cocatalysts and a selectivity control agent (SCA) which contains a mixture of (i) a first alkoxy silane and a second alkoxy silane and (ii) an ester of C4-C30-aliphatic acid, and the molar ratio of aluminium to total SCA ranges from 0.5:1 to 4:1.
Method of obtaining cis-1,4-(co) Method of obtaining cis-1,4-(co) / 2467019
Invention relates to method of obtaining cis-1,4-(co)polymers of conjugated dienes and can be used in production of synthetic rubber, and obtained materials - in tire and rubber industry. Method of obtaining cis-1,4-(co)polymers of conjugated dienes is realised by polymerisation of conjugated dienes or their copolymerisation with each other in medium of hydrocarbon solvent in presence of molecular weight (MW) regulator under action of catalytic complex, consisting of neodymium compound, halogen-free aluminium-organic compound, conjugated diene, necessary for formation of catalytic complex, and halogen source, catalytic complex is obtained in medium of hydrocarbon solvent by interaction of neodymium compound with conjugated diene, necessary for catalytic complex formation, with further fractional addition of halogen-free aluminium-organic compound with further supply of halogen source, of halogen-free aluminium-organic compound being selected from group of compounds, which contains trialkylaluminium, dialkylaluminium hydride, alkylalumoxane.

FIELD: chemistry.

SUBSTANCE: invention relates to production of polymers, specifically metal complex polymerisation catalysts, and can be used to produce trans-1,4-polyisoprene. Described is a method of obtaining a modified titanium-magnesium nanocatalyst for polymerisation of isoprenate by reacting magnesium with titanium tetrachloride and butyl chloride in volume ratio of 1/(63-190), followed by washing and further modification with phosphine of general formula R3P, where R=aryl, alkyl or a thiol of general formula R1SR2, where R1, R2=aryl, alkyl or carbon disulphide. In the nanocatalyst, the ratio phosphorus/titanium in the case of phosphine or sulphur/titanium in the case of thiol or carbon disulphide ranges from 1 to 20 mol/mol.

EFFECT: high stereospecificity of the catalyst with respect to isoprene and reduced amount of low molecular weight fractions in polyisoprene.

3 cl, 15 ex

 

The invention relates to the production of polymers, namely: a metal-complex catalysts of polymerization, and can be used to obtain TRANS-1,4-polyisoprene.

A method of obtaining titanium-magnesium catalyst for the polymerization of isoprene by the following method: charged to the reactor magnesium turnings, a solvent, n-butyl chloride (1/5 of the total number) and a crystal of iodine, the temperature was raised to 65-70°C and gradually add the remainder of the butyl chloride, the reaction leads 4 hours, after cooling the suspension, the solvent is decanted and the precipitate washed with solvent from unreacted n-butyl chloride, then with solvent and at 60-70°C add the titanium tetrachloride, after 5-6 hours the reactor is cooled, the solvent is decanted, the resulting titanium-magnesium catalyst is washed from an excess of titanium tetrachloride (Patent RF 2196782). This method is sequential and requires considerable time for synthesis.

Closest to the proposed invention is a method of obtaining titanium-magnesium of nanocatalysts (co)polymerization of alpha-olefins and conjugated dienes (RF patent 2425059). The interaction of magnesium metal with n-butyl chloride occurs in a single phase with the direct participation in the reaction of titanium tetrachloride. When this happens its restoration mA the of and cocrystallization formed of magnesium dichloride and trichloride titanium. The content of the butyl chloride is 6.0-8.7 ml per 1 g of magnesium, the volumetric ratio of titanium tetrachloride to the butyl chloride is 1/(47-67).

These synthesis methods allow to obtain a catalyst for the polymerization of isoprene in the TRANS-1,4-polyisoprene with a content of TRANS-1,4-units 92% srednekamennogo molecular weight of up to 20,000 g/mol, the mass-average molecular weight of 50,000 g/mol. At the same time there is a problem of increasing molecular mass and a content of TRANS-1,4-units in the isoprene.

The technical problem of the invention to provide a new method for the synthesis of titanium-magnesium of nanocatalysts, allowing to obtain TRANS-1,4-polyisoprene with a molecular mass of more than 50,000 g/mol and a content of TRANS-1,4-units of more than 92%.

The technical result of the invention is to improve stereospecificity action of the catalyst with respect to isoprene and reduce the amount of low molecular weight fractions in the polyisoprene.

This technical result is achieved by introducing into the composition of the titanium-magnesium of nanocatalysts modifying additives on the basis of the phosphines of General formula R3P (R = aryl, alkyl) or thiols of the General formula R1SR2, (R1, R2= aryl, alkyl), or carbon disulphide, and the change of the volume ratio of titanium tetrachloride to the butyl chloride.

Modifica is consistent titanium-magnesium catalyst for the polymerization of isoprene produced by the interaction of magnesium with titanium tetrachloride and butyl chloride with their volumetric ratio of 1/(63-190), then rinse and additional modification of a phosphine of General formula R3P (R = aryl, alkyl) or a thiol of General formula R1SR2, (R1, R2= aryl, alkyl), or carbon disulphide.

The ratio of modifier and titanium, namely phosphorus/titanium in the case of additives on the basis of the said phosphine or sulfur/titanium in the case of additives on the basis of the said thiol or disulfide is from 1 to 20 mol/mol.

The synthesis of the modified titanium-magnesium catalyst is carried out at the following ratios: 1 g of the magnesium content of the butyl chloride is 9-15 ml volumetric ratio of titanium tetrachloride and butyl chloride is 1/(63-190).

By electron transmission microscopy revealed that the obtained catalyst is a nanoparticles (15-35 nm).

The following examples 1-7 illustrate the proposed method of obtaining modified titanium-magnesium of nanocatalysts.

Example 1

In a reactor with a stirrer in an atmosphere of inert gas (argon, nitrogen) loads simultaneously 2.4 g of magnesium shavings, 21 ml of n-butyl chloride and 0.33 ml of titanium tetrachloride. The volumetric ratio of titanium tetrachloride and butyl chloride is 1/63,6. The reaction is carried out at 78-80°C for 4 hours. The precipitate of the catalyst is washed twice with hot hexane, and then into the reactor until ablaut 1,83 g triallylamine. The mixture is stirred at 60°C, cooled. The ratio of phosphorus/titanium is 2 mol/mol.

Example 2

In a reactor with a stirrer in an atmosphere of inert gas (argon, nitrogen) loads simultaneously 2.4 g of magnesium shavings, 21 ml of n-butyl chloride and 0.33 ml of titanium tetrachloride. The volumetric ratio of titanium tetrachloride and butyl chloride is 1/63,6. The reaction is carried out at 78-80°C for 4 hours. The precipitate of the catalyst is washed twice with hot hexane, and then into the reactor add 6 ml of tributylphosphine. The mixture is stirred at 60°C, cooled. The ratio of phosphorus/titanium is 8 mol/mol.

Example 3

In a reactor with a stirrer in an atmosphere of inert gas (argon, nitrogen) loads simultaneously 3.6 g of magnesium shavings, to 31.5 ml of n-butyl chloride and 0.17 ml of titanium tetrachloride. The volumetric ratio of titanium tetrachloride and butyl chloride is 1/190. The reaction is carried out at 75°C for 6 hours. The precipitate of the catalyst is washed twice with hot hexane, and then the reactor is added to 4.2 g tricyclohexylphosphine. The mixture is stirred at 60°C, cooled. The ratio of phosphorus/titanium is 10 mol/mol.

Example 4

In a reactor with a stirrer in an atmosphere of inert gas (argon, nitrogen) loads simultaneously 3.6 g of magnesium shavings, to 31.5 ml of n-butyl chloride and 0.17 ml of titanium tetrachloride. The volumetric ratio of titanium tetrachloride and butyl chloride which is 1/190. The reaction is carried out at 75-76°C for 4 hours. The precipitate of the catalyst is washed twice with hot hexane, and then into the reactor type of 0.79 g of triphenylphosphine. The mixture is stirred at 60°C, cooled. The ratio of phosphorus/titanium is 2 mol/mol.

Example 5

In a reactor with a stirrer in an atmosphere of inert gas (argon, nitrogen) loads simultaneously 1.2 g of magnesium shavings, and 10.5 ml of n-butyl chloride and 0,065 ml of titanium tetrachloride. The reaction is carried out at 78-80°C for 4 hours. The volumetric ratio of titanium tetrachloride and butyl chloride is 1/161,5. The precipitate of the catalyst is washed twice with hot hexane, and then into the reactor type of 1.39 ml of carbon disulfide. The mixture is stirred at 60°C, cooled. The ratio of sulfur/titanium is 19 mol/mol.

Example 6

In a reactor with a stirrer in an atmosphere of inert gas (argon, nitrogen) loads simultaneously 2.4 g of magnesium shavings, 21 ml of n-butyl chloride and 0.33 ml of titanium tetrachloride. The reaction is carried out at 78-80°C for 4 hours. The volumetric ratio of titanium tetrachloride and butyl chloride is 1/63,6. The precipitate of the catalyst is washed twice with hot hexane, and then into the reactor type of 1.59 ml of tetrahydrothiophene. The mixture is stirred at 60°C, cooled. The ratio of sulfur/titanium is 6 mol/mol.

Example 7

In a reactor with a stirrer in an atmosphere of inert gas (argon, nitrogen loads simultaneously 2.4 g of magnesium shavings, 21 ml of n-butyl chloride and 0.33 ml of titanium tetrachloride. The reaction is carried out at 78-80°C for 4 hours. The volumetric ratio of titanium tetrachloride and butyl chloride is 1/63,6. The precipitate of the catalyst is washed twice with hot hexane, and then into the reactor add 0,81 ml phenylalaline. The mixture is stirred at 60°C, cooled. The ratio of sulfur/titanium is 2 mol/mol.

The obtained modified titanium-magnesium catalyst can be used in various catalytic systems for the polymerization of conjugated dienes and alpha-olefins.

Example 8 illustrates the effect of nanocatalysts without modifying additives described in the patent of the Russian Federation 2425059.

Examples 9-15 illustrate the effect of modified nanocatalysts obtained by the described method, the polymerization of isoprene, but do not limit its application.

Example 8

Polymerizate isoprene is carried out in a glass reactor with a stirrer in an atmosphere of inert gas.

Charged to the reactor 40 ml of a mixture of isoprene from isopentane content of isoprene 15 wt.%, 4,7 ml triisobutylaluminum in the form of a solution in hexane with aluminium concentration of 0.8 mol/l, 2.2 ml of a suspension of unmodified titanium-magnesium of nanocatalysts with the concentration of titanium 0.5 mol/liter Polymerization is conducted for two hours at 25°C, then stopping the pad from sliding the t introduction 5 ml of ethanol. Conversion of isoprene is 98.8%, the content of TRANS-1,4-units in the isoprene is of 92.1%, Mn=19000, Mw=43000.

Example 9

In the reactor load of 13.8 ml of isoprene, 60 ml of hexane, 1.7 ml of triisobutylaluminum in the form of a solution in hexane with aluminium concentration of 1.2 mol/l and 1.8 ml suspension of titanium-magnesium of nanocatalysts prepared according to example 1. The polymerization is carried out in four hours at 25°C, then stopped by introducing 5 ml of ethanol. Conversion of isoprene is of 92.6%, a content of TRANS-1,4-units in the isoprene is 94,4%, Mn=180000, Mw=437000.

Example 10

In the reactor load of 13.8 ml of isoprene, 60 ml of hexane, 1.7 ml of triisobutylaluminum in the form of a solution in hexane with aluminium concentration of 1.2 mol/l and 1.8 ml suspension of titanium-magnesium of nanocatalysts prepared according to example 2. The polymerization is carried out in four hours at 25°C, then stopped by introducing 5 ml of ethanol. Conversion of isoprene is 90%, the content of TRANS-1,4-units in the isoprene is 96.8%, Mn=194000, Mw=662000.

Example 11

In the reactor load of 13.8 ml of isoprene, 60 ml of hexane, 1.7 ml of triisobutylaluminum in the form of a solution in hexane with aluminium concentration of 1.2 mol/l and 1.8 ml suspension of titanium-magnesium of nanocatalysts prepared according to example 3. The polymerization is carried out in four hours at 25°C, then stopped by the introduction of a 5 ml this is Ola. Conversion of isoprene is 84,5%, the content of TRANS-1,4-units in the isoprene is 94,1%, Mn=92000, Mw=182000.

Example 12

In the reactor load of 13.8 ml of isoprene, 60 ml of hexane, 1.7 ml of triisobutylaluminum in the form of a solution in hexane with aluminium concentration of 1.2 mol/l and 1.8 ml suspension of titanium-magnesium of nanocatalysts prepared according to example 4. The polymerization is conducted for two hours at 25°C, then stopped by introducing 5 ml of ethanol. Conversion of isoprene or 97.7%, a content of TRANS-1,4-units in the isoprene is 97,0%, Mn=292000, Mw=709000.

Example 13

In the reactor load of 13.8 ml of isoprene, 60 ml of hexane, 1.7 ml of triisobutylaluminum in the form of a solution in hexane with aluminium concentration of 1.2 mol/l and 1.8 ml suspension of titanium-magnesium of nanocatalysts prepared according to example 5. The polymerization is conducted for five hours at 25°C, then stopped by introducing 5 ml of ethanol. Conversion of isoprene is to 97.1%, a content of TRANS-1,4-units in the isoprene is 97.3%, Mn=520000, Mw=934000.

Example 14

In the reactor load of 13.8 ml of isoprene, 60 ml of hexane, 1.7 ml of triisobutylaluminum in the form of a solution in hexane with aluminium concentration of 1.2 mol/l and 1.8 ml suspension of titanium-magnesium of nanocatalysts prepared according to example 6. The polymerization is conducted for two hours at 25°C, then stopped by introducing 5 ml of ethanol. To the version of isoprene is 88%, the content of TRANS-1,4-units in the isoprene-91.7%, Mn=172000, Mw=611000.

Example 15

In the reactor load of 13.8 ml of isoprene, 60 ml of hexane, 1.7 ml of triisobutylaluminum in the form of a solution in hexane with aluminium concentration of 1.2 mol/l and 1.8 ml suspension of titanium-magnesium of nanocatalysts prepared according to example 7. The polymerization is conducted for two hours at 25°C, then stopped by introducing 5 ml of ethanol. Conversion of isoprene is to 89.5%, a content of TRANS-1,4-units in the isoprene is 93.0%, Mn=74000, Mw=291000.

These examples show that with some decrease in the rate of polymerization, expressed in the increase of time of polymerization to achieve the conversion of isoprene greater than 90%, the modified titanium-magnesium nano-catalysts described in examples 1-3, can significantly improve bulk and srednekamennogo molecular weight, as well as to increase the content of TRANS-1,4-units in the isoprene.

1. The method of obtaining modified titanium-magnesium of nanocatalysts for the polymerization of isoprene by the interaction of magnesium with titanium tetrachloride and butyl chloride, characterized in that the interaction is carried out at a volume ratio of titanium tetrachloride and butyl chloride 1/(63-190), then rinse and additional modification of a phosphine of General formula R3P, where R is ar is l, alkyl, or a thiol of General formula R1SR2where R1, R2aryl, alkyl, or carbon disulphide.

2. The method according to claim 1, wherein when the modification of nanocatalysts specified phosphine ratio of phosphorus/titanium in nanocatalysts is from 1 to 20 mol/mol.

3. The method according to claim 1, wherein when the modification of nanocatalysts specified thiol or disulfide ratio sulfur/titanium in nanocatalysts is from 1 to 20 mol/mol.

 

© 2013-2015 Russian business network RussianPatents.com - Special Russian commercial information project for world wide. Foreign filing in English.