Gas/liquid separation column, comprising a liquid dispensing device and a gas/liquid contact component, designed so that a fluid flows in a first liquid circulation direction through the device upstream of the gas/liquid contact component, the dispensing device comprising: • a plurality of stacks extending from a lower plate along a vertical axis perpendicular to a first plane, each stack being configured to be followed by the gas in a second circulation direction opposite the first direction, the stacks being disposed above cutouts in the lower plate, • a plurality of plugging means, respectively arranged at an upper vertical end of one of the stacks and over the entire longitudinal dimension of said stack, each plugging means having a gutter shape allowing direct collection of a first portion of the liquid that is conveyed through the dispensing device, the plugging means each having a first, open longitudinal end and a second, closed longitudinal end, so as to force liquid to exit the gutter via the first, open longitudinal end; • at least one opening being provided laterally in a wall demarcating the stack in the vicinity of a vertical end of the stack and of the plugging means plugging this vertical end • the lower plate mainly falling within the first plane and in which several orifices are provided, through which the liquid is able to leave the dispensing device; • a plurality of troughs configured to directly collect a second portion of the liquid conveyed through the dispensing device, each trough mainly extending along the longitudinal axis and being transversely demarcated by at least one stack, at least one part of the orifices being distributed in the base of said troughs, each trough having the lower plate for the base; • the dispensing device being configured so that the first portion of the liquid leaving the gutters formed by the plugging means pours into the troughs; • at least one upper peripheral channel (537, 538) provided between the longitudinal ends (234, 334) of each plugging means and a peripheral edge of the dispensing device, said at least one upper peripheral channel (537, 538) being configured in order to, on the one hand, directly collect a third portion of the liquid conveyed through the dispensing device and, on the other hand, allow the circulation of the first portion of liquid exiting the plugging means towards the troughs, the upper peripheral channel being located above the lower plate at an intermediate level of the height of the stacks, characterized in that each trough comprises a first, open longitudinal end and a second, closed longitudinal end, the first, open longitudinal end of each trough comprising a wall, in which a groove is provided, through which the liquid is able to meet the relevant trough, and in that said at least one upper peripheral channel (537, 538) forms an upper plate (137, 138) of substantially annular shape. • a plurality of stacks extending from a lower plate along a vertical axis perpendicular to a first plane, each stack being configured to be followed by the gas in a second circulation direction opposite the first direction, the stacks being disposed above cutouts in the lower plate, • a plurality of plugging means, respectively arranged at an upper vertical end of one of the stacks and over the entire longitudinal dimension of said stack, each plugging means having a gutter shape allowing direct collection of a first portion of the liquid that is conveyed through the dispensing device, the plugging means each having a first, open longitudinal end and a second, closed longitudinal end, so as to force liquid to exit the gutter via the first, open longitudinal end; • at least one opening being provided laterally in a wall demarcating the stack in the vicinity of a vertical end of the stack and of the plugging means plugging this vertical end • the lower plate mainly falling within the first plane and in which several orifices are provided, through which the liquid is able to leave the dispensing device; • a plurality of troughs configured to directly collect a second portion of the liquid conveyed through the dispensing device, each trough mainly extending along the longitudinal axis and being transversely demarcated by at least one stack, at least one part of the orifices being distributed in the base of said troughs, each trough having the lower plate for the base; • the dispensing device being configured so that the first portion of the liquid leaving the gutters formed by the plugging means pours into the troughs; • at least one upper peripheral channel (537, 538) provided between the longitudinal ends (234, 334) of each plugging means and a peripheral edge of the dispensing device, said at least one upper peripheral channel (537, 538) being configured in order to, on the one hand, directly collect a third portion of the liquid conveyed through the dispensing device and, on the other hand, allow the circulation of the first portion of liquid exiting the plugging means towards the troughs, the upper peripheral channel being located above the lower plate at an intermediate level of the height of the stacks,