Patent ID: 7074258
Filing Date: 2006-07-11
Classification: B01D,C10L,Y02C

Abstract:
1. A process for the removal of water from a gas which comprises: (a) an absorption step of bringing a gas saturated with water vapour into gas-liquid contact with a water-lean absorbing liquid comprising a water absorbing liquid whereby water vapour present in the gas is absorbed into the water-lean absorbing liquid to produce a refined gas having a reduced water vapour content and a water-loaded absorbing liquid having a cloud point temperature above the freezing point of water wherein the temperature of the absorption step is below the cloud point temperature of the water-loaded absorbing fluid; and (b) a regeneration step of heating the water-loaded absorbing liquid to above the cloud point temperature of the water-loaded absorbing liquid whereby the water-loaded absorbing liquid separates into a water-rich phase and an absorbing liquid-rich phase and cooling the absorbing liquid-rich phase to a temperature below its cloud point prior to recycling the absorbing liquid-rich phase for use as water-lean absorbing liquid in the absorption step.