5 results about "Triethylaluminium" patented technology

The application discloses a preparation method of high-purity triethyl indium and relates to the technical field of metal organic source synthesis. Nowadays, high-purity indium source is a key raw material for MOCVD technology. Currently, the commonly used indium source is trimethyl indium. However, trimethyl indium is solid at room temperature, which easily causes problems such as excessive solid indium source residue, low solid molecule overflow rate, and hardening and channeling. Therefore, the solid indium source is worse than liquid source in vapor saturation and source content stability. In the application, the halide of indium and triethyl aluminum are reacted to generate triethyl indium under the protection of inert gas. The crude triethyl indium is purified by reduced pressure distillation. The finished triethyl indium is obtained by further purification. The whole process is simple in operation. In addition, the purity of the product is improved under the protection of inert gas, so that the preparation of triethyl indium is not affected by other solvents.

The present application relates to the field of olefin catalytic polymerization, and aims to provide a catalytic system for preparing ultra-pure isotactic polypropylene and application thereof.The catalytic system comprises three components of a main catalyst, a cocatalyst and an external electron donor; wherein the main catalyst is a TiCl4 / MgCl2.ID supported high-efficiency spherical Ziegler-Natta catalyst, ID refers to diisobutyl phthalate or 2,2-diisobutyl-1,3-dimethoxypropane as an internal electron donor; the cocatalyst is a mixture of triethyl aluminum and triisobutyl aluminum; and the external electron donor is diisopropyl dimethoxysilane; or the cocatalyst is triethyl aluminum; and the external electron donor is a mixture of cyclohexyl methyl dimethoxysilane and dicyclopentyl dimethoxysilane.The catalytic system provided by the present application is simple to operate, does not need to synthesize complex-structure alkyl aluminum or siloxane, has controllable cost, and is easy to industrialize; and the product meets the requirements of low ash content, high polymerization activity and high isotacticity at the same time.

This invention discloses a continuous purification method and system for triethylaluminum based on membrane separation and complexation. The method first uses a sterically hindered amine complexing agent to selectively pre-complex chloride-containing impurities in crude triethylaluminum. Then, it sequentially passes the crude triethylaluminum through an inorganic ceramic nanofiltration membrane to retain large molecular complexes, followed by the removal of small molecular volatile impurities using an organic pervaporation membrane. Finally, it undergoes deep purification via a composite adsorption tower. The entire process is carried out under mild conditions, is safe and efficient, and is easily operable continuously and automatically. It significantly reduces the content of chloride ions and colored impurities in the product, yielding high-purity triethylaluminum, making it particularly suitable for high-end polyolefin catalysis.

The utility model provides a kind of effectively improve reaction kettle device of triethylaluminium production efficiency, it solves the problems, such as aluminium powder reaction rate reduction and stirring system abrasion, it includes reaction kettle main part, reaction kettle main part inside rotation is installed with the stirring shaft extending along axial direction, fixed sleeve is installed between the stirring shaft lower end and reaction kettle main part, stirring disc connected with stirring shaft is rotationally installed at the bottom of reaction kettle main part, stirring blade is installed on stirring disc and adjusting assembly is arranged between stirring blade and stirring disc, high-pressure circulating pump is connected to the bottom and top of reaction kettle main part by circulation pipe.The utility model has the advantages of good reaction effect, stable structure and the like.

The present application belongs to the technical field of catalyst, and particularly relates to a method for hydrogenation reaction in production of triethylaluminum catalyzed by aluminum hydrogen structure activator. The present application provides a method for hydrogenation reaction in production of triethylaluminum catalyzed by aluminum hydrogen structure activator, which comprises adding triethylaluminum mother liquor and aluminum powder mixture mixed with aluminum hydrogen structure activator in advance into a reaction kettle, heating under stirring, passing in hydrogen and pressurizing, continuously keeping hydrogen passing in during the reaction to ensure that the reaction kettle is in a constant pressure state, and obtaining target product diethylaluminum hydride and hydrogenolysis byproduct ethane after the reaction is completed. The present application provides a hydrogenation reaction with introduction of aluminum hydrogen structure activator, effectively improves the hydrogenation reaction speed and production efficiency, simultaneously reduces by-reactions and production cost, the activator is convenient to add, does not additionally increase process burden, related by-products are easy to remove and do not affect the environment and production safety.