METHOD FOR OBTAINING TRIALKYL ALUMINUM Russian patent published in 2022 - IPC C07F5/06 

FIELD: physical chemistry.

SUBSTANCE: invention relates to the production of organoaluminum compounds, namely, to a method for producing trialkyl aluminum. The proposed method involves the interaction of activated aluminum and hydrogen in the presence of trialkyl aluminum under heating and elevated pressure to form a mixture of dialkyl aluminum hydride and trialkyl aluminum, followed by treatment of the resulting mixture with olefin and isolation of the target product, while the interaction of activated aluminum and hydrogen in the presence of trialkyl aluminum is carried out at a temperature of 120-135°C and a pressure of no more than 2.9 MPa, the primary treatment of a mixture of dialkyl aluminum hydride and trialkyl aluminum with olefin is carried out at a temperature of 150-180°C and a pressure of 4.0-6.0 MPa, and the isolation of the target product is carried out together with additional olefin treatment of the entire mixture of dialkyl aluminum hydride and trialkyl aluminum containing 40-60 wt. % dialkyl aluminum hydride, in a mass ratio of 5-10:1 when the mixture is cooled to a temperature of 120-145°C and the pressure is lowered to 0.01-0.09 MPa. Further, the isolated trialkyl aluminum in a mixture with olefin, separated from aluminum impurities, is directed to the subsequent isolation of trialkyl aluminum, and the isolated olefin at the stage of trialkyl aluminum isolation is recycled into the process of primary and/or additional treatment of the mixture of dialkyl aluminum hydride and trialkyl aluminum with olefin.

EFFECT: creation of a simple and economical method for producing trialkyl aluminum to obtain a target product with a base substance content of at least 95 wt. % and aluminum impurities of less than 0.01 wt. %.

1 cl, 1 dwg, 3 ex