Cedric A Freeman

US Patent:

20120042689, Feb 23, 2012

Filed:

Aug 18, 2010

Appl. No.:

12/859166

Inventors:

Leonid Bresler - Northbrook IL, US
Cedric Freeman - Houston TX, US
Keith R. Clark - Santa Fe NM, US

Assignee:

UOP, LLC - Des Plaines IL

International Classification:

B01D 53/02
F25J 1/00

US Classification:

62611, 95114

Abstract:

One exemplary embodiment can be a process for purifying a natural gas by using first and second adsorbers. The process may include passing a feed including the natural gas through the first adsorber to obtain a purified natural gas product, regenerating the second adsorber in a heating stage, and regenerating the second adsorber in a cooling stage. The heating stage may include separating a portion of the feed comprised in a regeneration gas, passing the regeneration gas to a dryer for removing water, heating the regeneration gas with a heater after exiting the dryer, and passing the regeneration gas to the second adsorber to regenerate the second adsorber. The cooling stage may include expelling at initiation of cooling at least a part of a fluid present in the second adsorber to the dryer to desorb water from a molecular sieve in the dryer, and cooling the second adsorber by circulating the regeneration gas bypassing the heater.