Patent ID: 8568584

Claim:
A method for control of instability in a de-ethanizer tower in a gas recovery unit of fluid catalytic cracking units and delayed coking units caused by carriage of water together with a liquid phase of hydrocarbons in a feed load stream ( 9 ) coming from a high pressure drum, comprising: intervening in the operation of the de-ethanizer tower ( 13 ) when instability occurs in the de-ethanizer tower; and adjusting the material balance of water in the de-ethanizer tower to withdraw excess water of the feed load stream only as an azeotrope, wherein the intervention includes introduction into the feed load stream of a stream of hydrocarbons, wherein the stream of hydrocarbons comprises dry hydrocarbons or hydrocarbons with a low water content, and wherein the introduction is internal or external to the fluid catalytic cracking unit or delayed coking unit.