COLUMN AND METHOD FOR DISPROPORTIONATION OF CHLOROSILANES TO MONOSILANE AND TETRACHLOROSILANE AND INSTALLATION FOR PRODUCING MONOSILANE Russian patent published in 2019 - IPC B01D3/00 C01B33/107 

FIELD: chemical industry.

SUBSTANCE: invention is intended for the disproportionation of chlorosilanes to monosilane and tetrachlorosilane with simultaneous distillation separation of the silanes obtained therewith. Column for the continuous disproportionation of chlorosilanes to monosilane and tetrachlorosilane with simultaneous distillation separation of the silanes obtained in this process contains the upper part of the column, the lower part of the column and the cylindrical body of the column located between them. Inside the body of the column and along the axis of the column it contains at least two reaction zones located one above the other, in each of which there is a catalyst bed, in the catalyst layers, the chlorosilanes are disproportioned to low-boiling silanes, which form an upward gas flow inside the column, and high-boiling silanes, which after condensation form a downward liquid stream inside the column. Inside the shell and along the axis of the column contains at least two separation zones serving for the distillation separation. Reaction and separation zones along the axis of the column are alternately arranged. Separation zones are arranged so that the gas flow and the liquid flow are found in the separation zones. Reaction zones are arranged in such a way that a downward fluid flow passes through the catalyst beds, while an upward gas flow passes through the catalyst beds separately from the fluid flow. Installation for producing monosilane contains a column and a condenser connected in series with a column and/or a distillation device connected in series with a column. Method of disproportionation of chlorosilanes to monosilane and tetrachlorosilane with simultaneous rectification separation of the silanes obtained in this process is carried out in a column.

EFFECT: technical result: high efficiency, high product yields, simplicity of design.

16 cl, 5 dwg