Distributor tray for a fractionating column, comprising a compartment for distributing gas

1) A distributor tray for a column for exchanging heat and/or material between a gas and a liquid, said tray (1) having a plurality of chimneys (2) projecting on the upper part of said tray (1) for the passage of said gas through said tray (1), and at least one means for the passage of said liquid (4;

• 5) through said tray (1), characterized in that said tray (1) has at least one casing (10) for distributing said gas, said casing (10) covering at least part of the height of the chimneys (2), said casing (10) projecting above the chimneys (2), said casing (10) being closed off laterally and open at its upper end and at its lower end, said casing (10) being arranged around at least two chimneys (2) for the passage of the gas, said casing (10) having means (12) for remixing said gas that are arranged to remix the gas from said at least two chimneys (2) for the passage of the gas, and means (13) for redistributing said gas that are arranged above said means (12) for remixing said gas.