Patent ID: 7988134

Claim:
A mass transfer column ( 1 ) comprising: a column wall and at least one transfer tray ( 2 ) for routing liquid in an essentially horizontal direction, said tray comprising a plurality of riser necks and riser caps ( 3 ) through which gas is routed in a vertical direction, said transfer tray being a reverse flow tray comprising a liquid inlet and a liquid outlet, and a first separating weir ( 4 ) for changing the flow direction of liquid flowing over said at least one transfer tray by at least 90° from said liquid inlet to said liquid outlet said transfer tray ( 2 ) further comprising at least one guide weir ( 5 ), said guide weir comprising vertical wall sections for routing liquid flow from said liquid inlet, around said separating weir, and to said liquid outlet, and at least one braking weir ( 6 ) for reducing the flow velocity, said at least one braking weir ( 6 ) being traverse to said at least one guide weir ( 5 ), said transfer tray ( 2 ) being divided into tray sections ( 7 ), each section being defined by said at least one braking weir ( 6 ) and (a) two of the guide weirs ( 5 ), (b) said at least one guide weir and said separating weir ( 4 ), or (c) said at least one guide weir and said column wall.