Process for dehydrating gas

Details Process for dehydrating gas Process for dehydrating gas

2006-07-11

2006-07-11

Lawrence, Frank M. (Department: 1724)

Gas separation: processes

Liquid contacting

And recycle or reuse of contact liquid for further contact

C095S231000

Reexamination Certificate

active

07074258

ABSTRACT:
A process for the removal of water from gas which comprises an absorption step of bringing a gas saturated with water vapor into gas-liquid contact with a water-lean absorbing liquid comprising a water absorbing liquid having a cloud point temperature above the freezing point of water whereby water vapor present in the gas is absorbed into the water-lean absorbing liquid at a temperature below its cloud point to produce a refined gas having a reduced water vapor content and water-loaded absorbing liquid. A regeneration step is provided in which the water-loaded absorbing liquid is heated to above the cloud point temperature of the absorbing liquid whereby the water-loaded absorbing liquid separates into a water-rich phase and an absorbing liquid-rich phase and the absorbing liquid-rich phase is cooled 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.

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