A liquid mixing collector 1 is disclosed which comprises a first and a second sump zone, 10, 20, a first and optionally a second liquid collection region, 40, 50, a first and a second interspersed set, 60, 70, of spaced apart liquid collection channels 80 positioned in a first liquid collection region 40; said first set 60 being associated with said first sump zone 10; said second set 70 being associated with said second sump zone 20; wherein adjacent liquid collection channels 80 of the first and second sets, 60, 70, are vertically displaced from each other in one of at least two to four parallel horizontal planes 100. The present invention also relates to a column comprising said collector 1, the use of said collector 1 in a mass transfer or heat exchange column, and a method of collecting and mixing descending liquid in a column.