Gas separation: processes – Solid sorption – Organic gas or liquid particle sorbed
Patent
1995-06-07
1997-04-15
Lewis, Michael
Gas separation: processes
Solid sorption
Organic gas or liquid particle sorbed
95143, 95902, 62918, 62908, B01D 5302
Patent
active
056205023
ABSTRACT:
A process and apparatus for the recovery and purification of a contaminated refrigerant withdrawn from a refrigeration or refrigerant recovery system which employs a compressor and an adsorbent selective for the adsorption of halogenated hydrocarbons. The adsorbent is selected from the group consisting of silicalite, faujasites, steamed and rare earth exchanged zeolite Y, mordenite, ZSM-5 and mixtures thereof, and more particularly the group consisting of a low cerium rare earth exchanged zeolite Y-84, a low cerium rare earth exchanged zeolite LZ-210, Breck Structure Six, ECR-32, and mixtures thereof. A significant increase in the capacity of these adsorbents over conventional adsorbents combined with the use of novel process steps to recover, purify and return a purified refrigerant to the refrigeration system result in significant cost savings at reduced risk of release of halogenated hydrocarbons to the environment.
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Cohen Alan P.
Dunne Stephen R.
Staniulis Mark T.
Dunn Jr. Thomas G.
Lewis Michael
McBride Thomas K.
Silverman Richard P.
Tolomei John G.
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