122 results about "Triisobutylaluminium" patented technology

The invention discloses an application of load non- metallocene catalyst in the slurry process for vinyl polymerying, the load non- metallocene catalyst and catalyst promoter forming the catalytic system, the alkene polymerization comprising: vinyl homopolymerization, combined polymerization of vinyl with propylene, butylenes, hexane, octane or norbornene; the catalyst carrier being chosen from: inorganic oxide of metallic oxide from IIA, IIIA, IVA, and IVB groups, or oxided mixture and mixing oxide; the catalyst promoter being chosen from: methylaluoxane, ethylaluoxane, isobutylaluoxane, trimethylaluminum,triethylaluminum,triisobutylaluminum,methylaluoxane-trimethylaluminum or methylaluoxane-triethylaluminum; the mole proportion between the catalyst promoter and catalyst being Al/Ti= 1:1-500. The inventioin is characterized by the less methylaluoxane consumption, stable reaction, easy-to-control polymerization temperature and non still-sticking phenomenon. The produced polyolefine possesses perfect granual shape, and the maximum polymer clamp density can reach 0.385 g/ml.

The invention discloses a domino catalyzing system of a primary metallocene catalyst, which takes ethane as a sole monomer to prepare branched polyethylene, and the application thereof, which relates to vinyl copolymer. the catalyzing system is a compound catalyzing system consisting of the single primary metallocene catalyst and two different catalyst promoters, wherein, the primary catalyst is a metallocene catalyst with a structural formula of Cp<1>MR<1>R<2>R<3>, Cp<1>Cp<2>MR<1>R<2> or Cp<1>-D-Cp<2>MR<1>R<2>; alkyl aluminium acts as an oligomerization catalyst promoter; methylaluminoxane or triisobutyl aluminium or triethyl aluminum that is not used together with the oligomerization catalyst promoter acts as a copolymerization catalyst promoter; the mole ratio between the oligomerization catalyst promoter and the primary catalyst is 10-1000 to 1, and the mole ratio between the copolymerization catalyst promoter and the primary catalyst is 20-1000 to 1. The catalytic activity of the metallocene domino catalyzing system for preparing the branched polyethylene is 5 multiplied by 10<5> to 5 multiplied by 10<7>gPE/(molM per hour), the degree of branching is 10-200/1000C, the molecular weight of the branched polyethylene prepared under the effect of the catalyzing system ranges from 1 multiplied by 10<5> to 4 multiplied by 10<5> and the melting point is below 120 DEG C or even no melting point exists.

A catalyst for the self-polymerization of the ethene with three molecule to selectively generate 1-hexene is prepared from the Cr compound, the ligand containing P and/or N, aluminum alkylide, and promoter in the mole ratio of 1: (0.5-100): (50-5000): (0.5-100).

The invention relates to a cyclic olefin copolymer with polar group and a preparation method thereof. The cyclic olefin copolymer comprises the components by molar percent: 20-79.5% of cyclic olefin monomer with general formula I and/or general formula II, 20-79.5% of non-cyclic-olefin monomer with general formula III, and 0.5-20% of polar non-cyclic-olefin monomer with general formula IV. The preparation method of the cyclic olefin copolymer adopts a solution polymerization method; the cyclic olefin monomer, the non-cyclic-olefin monomer and the polar non-cyclic-olefin monomer protected by triisobutyl aluminium are added into a reaction kettle under the condition that metallocene main catalyst and alkyl aluminium catalyst accelerator exist, and then are stirred for polymerization reaction at the temperature of 30-100 DEG C under the atmospheric pressure of 1-100. The prepared cyclic olefin copolymer which has high content of cyclic olefin and the polar group has high heat resistance and cohesive property as well as good compatibility of organic matters.

A production process of cis-rich polybutadiene is to polymerize 1,3-butadiene under the temperature of 40~120íµ in hydrogenated gasoline. The process is characterized in that the initiation system is composed of nickel naphthenate, triisobutylaluminum, boron trifluoride D complex, wherein, D is a C6~C18 alcohol, an ester composed of C2~C4 alkyl acid and C4~C6 alkyl alcohol, or a R3N tertiary amine substance wherein the R is a C4~C8 alkyl. By regulating the content of boron trifluoride D complex, a cis-rich polybutadiene with 25~100 Mooney viscosity, less than 0.05% gel can be synthesized. The cis-rich polybutadiene has improved processing properties and stress at definite elongation, lower Mooney viscosity by 10 Mooney unit than that of general cis-1,4-polybutadiene rubber BR900 with the same molecular weight. The invention has advantages of low energy consumption, simple operation, steady production, long running period, and high conversion rate.

Ethylene and optional comonomers are polymerized using a supported metallocene catalyst, an alumoxane activator, and triisobutylaluminum (TIBAL). A silica support is first pretreated with a silane compound and then with an organoboron compound. The treated silica is then combined with a Group 4 metallocene complex and an alumoxane to generate a supported, activated catalyst. While it was previously thought that the particular support treatment technique used herein provided benefits only for polymerizations catalyzed by non-metallocene single-site complexes, it has now been found that similar benefits can be realized even with conventional metallocenes if TIBAL is selected as the scavenger.

The present invention relates to one kind of polypropylene alloy and its preparation process. The polypropylene alloy is prepared with propylene monomer, Ti, Cl, Mg, diester or diether in certain weight proportion, and through bulk polymerization after adding supported spherical catalyst and composite co-catalyst at 40-80 deg.c and 1.0-4.0 MPa for 1-2hr; and further polymerization after adding monocyclopentadiene Ti or Zr homogeneous catalyst and composite co-catalyst for other 1-3 hr to obtain spherical granular product. The polypropylene alloy has high bending modulus and high impact strength.

The invention relates to a sulfoacid rare earth catalyst for polymerizing high-cis-isoprene rubber and a preparation method thereof. The catalyst comprises benzenesulfonic acid neodymium rare earth complex and alkyl aluminum; the molar ratio of the alkyl aluminum to the rare earth neodymium in the benzenesulfonic acid neodymium rare earth complex is 15 to 40:1, wherein the benzenesulfonic acid neodymium rare earth complex comprises benzenesulfonic acid neodymium alcohol complex, benzenesulfonic acid neodymium sulphoxide complex, benzenesulfonic acid neodymium furan complex, benzenesulfonic acid neodymium amine complex, benzenesulfonic acid neodymium ether complex and benzenesulfonic acid neodymium ester complex; ligand comprises: alcohol compound, sulfoxide compound, furan compound, amine compound, ether compound and ester compound; and the alkyl aluminum comprises: 3-isobutyl aluminum, triethyl aluminum, diisobutyl aluminum hydride, or diethyl aluminum hydride. The sulfoacid rare earth complex catalyst is used for polymerizing isoprene, and can obtain the high-cis rare earth polyisoprene rubber with the cis 1,4 structure content more than 96.0 percent and the weight-average molecular weight more than 2.2 million.

A carried metallocene catalyst or post-transition metal catalyst for the catalytic polymerization of ethylene and propylene contains Zr or Fe (0.05-1.00 wt. portions), aluminium alkylide chosen from trimethyl aluminium, triethyl aluminum and triisobutyl aluminum (1-50) and molecular sieve-like calcium silicon compound (100). Its preparing process is also disclosed. Its advantages are high catalytic activity and no adhesion to reactor.

The invention discloses a catalysis system for preparing a copolymer of ethylene and/or alpha-olefin and cycloolefin. The catalysis system comprises a main catalyst and cocatalysts. The main catalystis a metallocene compound. The cocatalysts comprise an organoboron compound and alkyl aluminum. The invention also discloses a method for preparing the copolymer of ethylene and/or alpha-olefin and cycloolefin through the catalysis system. The method comprises that an inert organic solvent, ethylene and/or alpha-olefin and cycloolefin are sequentially added in a reactor at a temperature of 40 to 100 DEG C under pressure of 1 to 30 bar, after the ethylene and/or alpha-olefin is dissolved in the inert organic solvent until saturation, a triisobutyl aluminum solution, a metallocene catalyst solution and an organoboron compound solution are orderly added into the solution and the mixed solution undergoes a reaction. Compared with MAO, MMAO, and dMAO, the cocatalysts can efficiently polymerizethe cycloolefin copolymer, the metal content of the polymerization product is reduced and the post-treatment cost is greatly reduced.

A process for preparing polynorbornene with non-cyclopentadiene beta-diketone titanium catalyst includes, adding beta-diketone titanium as primary catalyst, then adding norbornene monomer solution, further adding toluene or o-dichlorobenzene as solvent for dissolving the catalyst, then further adding methyl aloxyane, triethyl aluminium, or triisobutyl aluminium as secondary catalyst, and reaction at 0-90 deg.C. Its product has high-temp. resistance (more than 400 deg.C) and high-vitrification temp. (300-400 deg.C).

Commonly used triethyl aluminum and tri-isobutyl aluminum cocatalysts can be replaced in olefin polymerizations with a cocatalyst conforming to the formula

AlR^z(X^z)_nL^z_m

wherein R^z is a linear or branched organic moiety having at least 5 carbons and X^z is a linear or branched organic moiety having at least 5 carbons or heteroatom substituted organic moiety or a heterocyclic moiety having at least 4 atoms and can be anionic (n=2) or dianionic (n=1). X^z can also be hydrogen. The aluminum complex may also be in the form of an adduct complex where L^z is a Lewis base and m=1-3. The general formula is subject to the proviso that when n=2, each X^z may be the same or different and that both X^z moieties may not be hydrogen. Use of the invention enables production of a polyolefin film, such as polyethylene film, exhibiting improved bubble stability and other desirable properties.

This invention provides a method for generating secondary phosphines from secondary phosphine oxides in the presence of a reducing agent, such as diisobutylaluminum hydride (DIBAL-H), triisobutyldialuminoxane, triisobutylaluminum, tetraisobutyldialuminoxane, or another reducing agent comprising: (i) an R₁R₂AlH moiety, wherein R₁ and R₂ are each an alkyl species or oxygen, and wherein at least one of R₁ or R₂ comprises at least 2 carbon atoms, or (ii) an R₁R₂R₃Al moiety, wherein R₁, R₂, and R₃ are not hydrogen, and wherein at least one of R₁, R₂, and R₃ is an alkyl species comprising a β-hydrogen, not including triethylaluminum. Preferred reducing agents for the present invention include: diisobutylaluminum hydride, triisobutyldialiuminoxane, triisobutylaluminum, tetraisobutyldialuminoxane, and combinations thereof.

The invention provides a chromite catalyst for trimerization of ethylene into 1-hexene and preparation and application thereof, raw materials for preparing the chromite catalyst comprise chromite organic acid salt, an electron donor, 2, 5-dimethyl pyrrole and a polydentate PNP compound, and at least one of trimethyl aluminum, triethyl aluminum, triisobutyl aluminum, trioctyl aluminum, diethyl aluminum monochloride, ethyl aluminum dichloride, ethyl aluminum sesquichloride, methylaluminoxane, modified methylaluminoxane and ethyl aluminoxane. According to the chromite catalyst, a chromite source is adopted to synthesize a chromite organic metal compound, and the step of reducing trivalent chromium into chromite by aluminum alkyl is reduced by the generated catalyst, so that the active center is ensured to be + 2 valence, the loss of the catalyst is avoided, and meanwhile, the situation that the reaction selectivity is reduced and the product yield is influenced by excessive aluminum alkyl is avoided. Therefore, 1-hexene with high activity and good selectivity is developed, and the operation cost of the 1-hexene device is greatly reduced.

The invention discloses a method for preparing polyepichlorohydrin by catalyzing epichlorohydrin polymerization by using a three-element iron catalyst, belonging to the field of polymer preparation and solving the problem of low activity of the catalyst for synthesizing polyepichlorohydrin from polymerization, and small molecular weight and wide PDI distribution of the obtained product in the prior art. The three-element iron catalyst (iron compound, alkyl aluminum compound or electron donor) is adopted to catalyze epichlorohydrin homopolymerization to obtain the polyepichlorohydrin, of which the molecular weight is 10000 above, the polymer color is light and the PDI distribution is 1.2 or so; and the reaction is easy to control. The catalyst is easy to prepare and has the advantage of high polymer yield. The iron compound is iron naphthenate, iron neodecanoate, iron isooctoate or the like; the organic aluminum compound is triisobutylaluminum, triethyl aluminum, sesquialuminum or the like; and the electron donor is tri-ortho-methylphenyl phosphite, diethyl phosphite, tributyl phosphate or the like.

The invention discloses a preparation method of biological packing for wastewater treatment and belongs to the field of water treatment. According to the preparation method, 10-undecen-1-ol and propylene are taken as raw materials, polar monomers trimethylaluminium and triisobutyl aluminium, methylaluminoxane and 2,6-di-tert-butyl-4-methylphenol are added and taken as promoters, ferrocene is takenas a main catalyst, a polymerization reaction is performed, oxygen atoms in enol are shielded by larger substituent groups on alkyl aluminium, catalyst poisoning caused by the fact that lone pair electrons on the oxygen atoms coordinate with an active center is prevented, protected undecylenyl alcohol monomers are copolymerized with propylene to obtain a polymer, hydroxyl is introduced into the polymer, the polymer has better hydrophilic performance and better binding property with wastewater in wastewater treatment, and water treatment efficiency is improved. The problem that the treatment effect is affected due to the fact that current packing is poor in affinity when bound with microorganisms and is prone to balling is solved.

The invention discloses an iron complex on the basis of flexible frameworks, a method for preparing the iron complex and application of the iron complex to isoprene polymerization. The iron complex onthe basis of the flexible frameworks is used as a primary catalyst. Co-catalysts include trimethylaluminium, triethylaluminum, triisobutylaluminum, methylaluminoxane or modified methylaluminoxane. The application includes steps of adding the primary catalyst, solvents and the co-catalysts; adding isoprene monomers and carrying out polymerization reaction to obtain polyisoprene. The ranges of theproportions of cis-1, 4 structures in obtained isoprene rubber are 29-48%, and the ranges of the proportions of 3, 4 structures are 52-71%. The iron complex, the method and the application have the advantages that polymers are high in molecular weight and narrow in molecular weight distribution; the use efficiency of iron-based catalysts can be effectively improved by the aid of a method for preparing the isoprene rubber, and the industrial application values of the iron-based catalysts can be effectively increased by the aid of the method for preparing the isoprene rubber.

Catalysts for copolymerization of olefins and styrenes, comprising (A) a transition metal compound, (B) an oxygen-containing compound and/or a compound capable of reacting with a transition metal compound to form an ionic complex, (C) a specific compound such as a reaction product of triphenylmethyl alcohol and triisobutylaluminium, and optionally (D) an alkylating agent, and methods for producing olefin-styrene copolymers in the presence of such catalysts, which catalysts have the advantages of enhancing the copolymerization activity and reducing the amount of the promoter such as oxygen-containing compounds, etc, and using them, olefin-styrene copolymers can be produced efficiently and inexpensively.

The invention relates to a method for preparing a syndiotactic poly1,2-butadiene thermoplastic elastomer, which comprises the following steps: initiating the polymerization of 1,3-butadiene monomer in hexane solution of a synthetic rubber through the addition of 1,2-configurational units by using iron catalysts to form a uniform blend of 1,2-butadiene and synthetic rubber, wherein the catalysts comprise iron isooctanoate or iron naphthenate, diethyl phosphate, triisobutyl aluminium and aluminium triethyl; the adding sequence of the catalysts is that any components are combined or two aluminum alkyls are mixed first and then combined with the other two components optionally; in a polymerization system, every 1,000 millilitres of hexane solution contains 90 to 140 grams of 1,3-butadiene monomer, and the adding amount of the rubber is 0.1 to 25 grams; and the polymerization initiating temperature is 60 to 90 DEG C. The blend has the properties of the typical thermoplastic elastomers and can be used for modifying thin films, shoe soles, tubular materials, rubbers and plastics.

The method for preparing polynorbornene by using novel bridged diimine nickel and palladium catalyst includes the following steps: firstly, adding main catalyst, then adding norbornene monomer solution, then adding solvent, finally adding catalyst promoter, the described main catalyst is the bridged diimine nickel and palladium compounding material, its concentration is 1X10 to the minus sixth-1X10 to the minus third mal/L, the described catalyst promoter is methyl aluminium-oxane, triethyl aluminium o r triisobutylaluminium, the mole ratio of the catalyst promotor and main catalyst is 1-10000, the solvent of the described norbornene monomer solution is methylbenzene, and the concentration of monomer in reaction system is 0.01-6.0 mol/L, the solvent of the described system i s methylbenzene, and its reaction temp. is 0 deg.C-90 deg.C.

A process for the anionic polymerization of monomers, by the step of polymerizing the monomers in the presence of an initiator composition comprising a metal hydride such as sodium hydride and an organyl metal compound such as triisobutylaluminum, the monomers comprising one or more vinylic monomers comprising one or more elements different from carbon and hydrogen.

The present invention discloses one kind of sulfonated long chain alpha-olefin copolymer and its preparation process and use. The preparation process includes the following steps: 1. adding triisobutyl aluminum, diphenyl dimethoxy silane, spherical polypropylene catalyst, long chain alpha-olefin and styrene into n-heptane solvent to polymerize styrene-long chain alpha-olefin copolymer; and 2. dissolving the styrene-long chain alpha-olefin copolymer in o-dichlorobenzene through heating and stirring, and dropping concentrated sulfuric acid slowly to sulfonate and obtain sulfonated long chain alpha-olefin copolymer. The preparation process is simple and low in production cost, and the sulfonated long chain alpha-olefin copolymer may be used in preparing agricultural film with excellent surface hydrophilicity, long service life and other advantages.

The invention discloses a hydrophilicity long chain alpha-olefin graft copolymer and preparing method and use thereof. The preparing method includes steps: 1) adding water-free and oxygen-free long chain alpha-olefin, triisobutyl aluminum, diphenyl dimethoxyl silicon and spheric polypropylene catalyst in turn to plastic test tube with magnetic force stirring device under inertia gas protection; after polymerizing, transferring the mixture to refrigerator and obtaining poly(long chain alpha-olefin); 2) adding the poly(long chain alpha-olefin) to three-mouth flask with magnetic force stirring device and nitrogen inlet, adding toluene as solvent, heating and stirring to sufficient dissolve, ventilating nitrogen, adding maleic anhydride and organic peroxide initiator, reacting and obtaining hydrophilicity long chain alpha-olefin graft copolymer. Advantages of the invention are: technique is simple, operation is convenient, polyethylene film basal body is not influenced, processing method id simple, cost is low, hydrophilicity of film surface is good and life of fogdrop resistant is long.

The invention discloses a process for semicontinuous preparation of syndiotactic polystyrene particles by using styrene as monomer, metallocene titanium compound as main catalyst, aluminium alkyl and triisobutyl aluminium as auxiliary catalyst, carrying out seed semi-continuous polymerization in composite inert medium under normal pressure at 50-80 deg. C, the seeds are polystyrene particles with good granule shape. The invention can realize high styrene conversion rate.