43 results about "Diethylaluminium chloride" patented technology

The invention relates to a method for preparing single salicylaldehyde imine vanadium olefin polymerization catalyst and application of the catalyst in catalyzing ethylene polymerization. Under the catalyzing effect of formic acid, condensation reaction of the salicylaldehyde or derivatives of the salicylaldehyde and aniline or derivatives of the aniline is carried out in methanol solution, and skiff base is obtained. Under the condition of no water and no oxygen and under the effect of excess triethylamine, the single salicylaldehyde imine vanadium olefin polymerization catalyst of the invention is obtained by complexation reaction of the skiff base and vanadium trichloride. Under the effect of diethyl aluminium chloride, the catalyst of the invention can be used for catalyzing ethylene polymerization. The invention has the advantages of easy preparation, high catalyzing activity and good thermal stability.

The invention relates to a catalyst containing naphthyl-substituted asymmetric acenaphthenediimine nickel complexes, a preparing method of the complexes and applications of the complexes. The general structure of the nickel complexes is shown as a formula I, wherein R<1> is bis(phenyl)methyl or bis(fluorophenyl)methyl, R<2> is hydrogen and bis(phenyl)methyl or bis(fluorophenyl)methyl, R<3> is C1-C3 alkyl, R<4> is hydrogen or methyl, and X is selected from bromine or chlorine. The preparing method includes reacting ligands shown as a formula V and (DME)NiBr2 or NiCl2.6H2O under oxygen-free conditions to obtain the nickel complexes shown as the formula I. Under the existence of a cocatalyst that is diethylaluminium chloride or/and methylaluminoxane, and the like, the nickel complexes can catalyze ethylene polymerization well to obtain polymer with a high molecular weight and a low degree of branching. The highest catalyzing activity of the nickel complexes can be 7.71*10<6> g.mol<-1>(Ni).h<-1>. The nickel complexes have a wide industrial application prospect.

The invention relates to a polymerization catalyst of tridentate salicylaldehyde imine vanadium alkene, a preparation method thereof and an application thereof. By the catalysis of formic acid, condensation reaction is carried out between the derivatives salicylaldehyde or salicylaldehyde, and amine compounds in methanol solution to obtain Schiff base; under the condition of no water and no oxygen, the Schiff base strips hydrogen protons and complexation reaction is carried out with vanadium trichloride to obtain the polymerization catalyst of tridentate salicylaldehyde imine vanadium alkene; by the action of aluminium diethyl monochloride, the polymerization catalyst is applied to catalyzing ethylene for polymerization; and by the action of aluminium diethyl monochloride, the polymerization catalyst is applied to the copolymerization of ethylene and 1-hexylene at 25 DEG C and used for catalyzing the copolymerization of ethylene and norbornene at the temperature of 50 DEG C. The polymerization catalyst has the advantages of convenient preparation, high catalytic activity, good heat stability, strong copolymerization capacity, etc.

The invention discloses a beta-diketone mono-imide vanadium olefinic polymerization catalyst and the manufacture method and the application of ethylene polymerizing, ethylene and norborene polymerizing, ethylene and alpha-alkene or norborene copolymerization. Under the catalysis of formic acid, beta-diketone compound and aniline or the ramification of aniline taking condensation reaction in methanol solution to gain Schiff base; under the non water and non oxygen condition, the Schiff base taking reaction with butyl lithium to gain negative ion ligand; under the non-water, non oxygen condition, the negative ion ligand taking coordination reaction with VCl3, the beta-ketimine vanadium alkene polymerization catalyst could be gained. The invention could catalyze ethylene polymerization, and the copolymerizing of ethylene and alpha-alkene or norborene.

Novel late-transition-metal alpha-diimine nickel (II) complexes containing p-benzhydryl substitutes are disclosed. According to the complexes, two bulky groups which are benzhydryl are introduced to the para positions of imine nitrogen atoms on aromatic rings, and therefore ethylene insertion is accelerated, catalyst activity is improved, the transferring rate of active chains to a monomer is reduced, and a polymer having a high molecular weight is prepared. Under activation by a cocatalyst that is diethylaluminium chloride, a catalytic system catalyzing ethylene polymerization has high catalytic activity (can be 10<6> g PE/(mol Ni h)), and prepared polyethylene having a high molecular weight has a high degree of branching (can be 131 branches per 1000 C). Because of ortho-position small-steric-hindrance substitution and immobilization by para-position bulky benzhydryl, 2-hexene can be easily inserted to a metal center, and therefore chain shuttling polymerization of the 2-hexene has ahigh conversion ratio (88%), and a branch polymer having a high molecular weight and a low degree of dispersion is obtained. Accordingly, the catalyst has good potential application value in industrial polyolefin production.

The invention relates to a preparation method of an alkoxy silane-olefin copolymer. The preparation method comprises the following steps: firstly, carrying out hydrosilylation reaction on single hydrogen-terminated alkoxy silane and straight chain alpha, omega-diene under the action of a platinum catalyst to generate double bond-terminated alkoxy silane; secondly, carrying out coordinated copolymerization reaction on the double bond-terminated alkoxy silane and alpha-olefin under the action of a Ziegler-Natta vanadium-based main catalyst and a diethylaluminium chloride Et2AlCl cocatalyst system to generate the alkoxy silane-olefin copolymer. The invention also relates to a product obtained by the preparation method and application. By improving the method, the gel phenomenon is not caused during preparation of the alkoxy silane-olefin copolymer; in addition, the obtained product can be quickly crosslinked in an acidic environment; the content of the crosslinked gel reaches 10 to 100 percent, thereby realizing functional modification of a polyolefin material.

The invention discloses a method for synthesizing polyepichlorohydrin. The method comprises the following steps: catalyzing chloropropane by using a catalyst and additives, thereby obtaining epoxy chloropropane for later use; sequentially adding diethyl aluminum chloride and absolute ether into a three-opening flask with a stirrer, stirring for 10 minutes, cooling to be 0 DEG C, dropwise adding epoxypropane to react for 30-50 minutes, sucking out the volatile matters in time, further adding a methanol solution containing sodium hydroxide, stirring at normal temperature for 50 minutes, and stopping the reaction; moving the reaction mixture into a liquid separation funnel, washing, layering, and washing the obtained coarse product by using 5% hydrochloric acid, 5% sodium bicarbonate and distilled water till being neutral; and reducing the pressure by using a rotational evaporator, thereby obtaining 8.23g of polyepichlorohydrin. The polyepichlorohydrin yield is greater than 84.9%.

The invention discloses a two-component cobalt catalyst and application thereof in solution polymerization or suspension polymerization of 1,3-butadiene. The cobalt catalyst comprises: (1) a main catalyst, wherein the general formula of the main catalyst is CoCl2(PR<1>nR<2>(3-n))2, and R1 and R2 are independently selected from hydrogen, alkyl group, naphthene group, benzyl group and aryl group; (2) a cocatalyst, wherein the cocatalyst is an alkyl aluminum chloride compound, including diethylaluminium chloride, ethylaluminium dichloride and sesquiethyl aluminum chloride. The main catalyst and the cocatalyst of the cobalt catalyst are mixed and aged for a period of time in a solvent according to a proportion or are supported on inert powder to be prepared into a supported catalyst; the 1,3-butadiene is added to perform solution polymerization or suspension polymerization. The two-component cobalt catalyst shows superior catalytic activity and high product cis-form selectivity in the polymerization of the 1,3-butadiene, and has wide industrial application prospect.

Ruthenium is a transition metal element, has multiple valence states and complicated coordination states and can form various organic complexes. The bivalent ruthenium organic compound is the most common, and researches on the trivalent and the nulvalent ruthenium organic complexes are fewer. [C6Me6]2Ru is similar to ferrocene in shape and has a bread sandwich structure. E.O.Fischer firstly reports the synthesis of the compound [C6Me6]2Ru; aluminum powder and diethyl aluminum chloride used in the reaction have active chemical properties and can be oxidized and even burn and explode in air; and aluminum trichloride and aluminum tribromide are very sensitive to water. A Fischer [C6Me6]2Ru synthesis technology comprises four steps, wherein three steps need to be performed in an anhydrous and oxygen-free condition, reactants and reagents need to be dehydrated and deoxidized, the safety coefficient of a preparation process is low and the total yield is lower and is 19% only (in terms of RuCl3). The invention develops a brand new synthesis design way, in which RuCl3 hydrate is adopted as a raw material, four steps are performed for synthesis and reaction to prepare the [C6Me6]2Ru; the yield of the novel process reaches 39%, which is improved by 20% compared with that of the E.O.Fischer synthesis technology, and the reagents used in the synthesis process are stable and readily available; except for the last step of sodium ammonia reduction, dehydration and deoxidization are not needed in the other three steps, therefore, the operation technology process is simplified, the safety coefficient is raised, and the novel process is suitable for the industrialized production. The organic metal Ru(O) complex which is wide in application range is a potential homogeneous catalyst, can be applied to catalysis of aromatic hydrogenation and asymmetrical catalysis, and can also be applied to the field of clinical medicaments to serve as a novel anti-cancer medicament.

The invention discloses a preparation method of diethyl aluminum hydride. The preparation method comprises the following steps: (1) adding 80-120ml of diethyl aluminum hydride (Et2AlCl) to 500ml of three-mouth round-bottom flask, slowly adding 160-200ml of solvent under a stirring condition, and then further stirring for 20-40 minutes; (2) controlling the temperature to be not greater than 60 DEG C, slowly adding 40-42g of LiAlH4, fully mixing, heating in an oil bath, controlling the reaction temperature to be 100-110 DEG C and reacting for 3-5 hours; (3) after reacting, cooling, carrying out rotary evaporation at 50-60 DEG C until no liquid is evaporated, and then filtering to remove grey solid substances; and (4) carrying out reduced pressure distillation on filtrate, and collecting fractions at 102 DEG C, thereby obtaining a colorless transparent liquid as a target product. The diethyl aluminum hydride prepared by the method is high in purity and high in yield and has great potential industrial value.