Anti-swirl baffles are provided in a mass transfer column to reduce the swirling motion of a vapor or mixed phase feed stream introduced into the column. The column is of the type having an upper region of a preselected diameter, a lower region of reduced diameter, and an intermediate transition region...http://www.google.com/patents/US20030188851?utm_source=gb-gplus-sharePatent US20030188851 - Method and apparatus for facilitating more uniform vapor distribution in mass transfer and heat exhange columns
