Patent ID: 6089550
Filing Date: 2000-07-18
Classification: B01D

Abstract:
A mass transfer process which comprises:a) providing a tower having at least one perforated mass transfer tray located therein wherein the perforations provide the exclusive means of communicating between the space above the tray and the space below;b) passing a gas up the tower such that the gas passes through the perforations in the tray while at the same time causing a liquid to flow down through the tower and pass through the same perforations; andc) providing individual vapor flow deflectors supported and maintained a fixed distance above the level of the tray surface over each of at least some of the perforations,wherein each deflector is larger than the perforation that it covers such that vapor flowing upwards through such perforations is deflected from a vertical path to a path with a horizontal component, and wherein the perforations covered by individual deflectors are located in rows and the up-flowing vapor is directed by the deflectors associated with a first row of perforations into the areas between perforations in adjacent rows.