Gas separation: processes – Solid sorption – Inorganic gas or liquid particle sorbed
Patent
1998-10-06
2000-08-29
Spitzer, Robert
Gas separation: processes
Solid sorption
Inorganic gas or liquid particle sorbed
95126, 95902, 502 78, 502 79, B01D 5304, B01D 5328
Patent
active
06110258&
ABSTRACT:
A method for removing trace moisture from a gas is disclosed. The method involves heating a zeolite having a high silica-to-alumina ratio to about 400.degree. C. to remove physically absorbed water from the zeolite, followed by heating the zeolite to a temperature in excess of 650.degree. C., to form a superheated zeolite. Heating to temperatures of 650.degree. C. or above is believed to cause dehydroxylation of the zeolite. A method for the preparation of a dehydroxylated zeolite is also disclosed. The superheated zeolite is contacted with the gas, thereby adsorbing water from the gas. A dehydroxylated zeolite for removing trace moisture from a gas wherein the zeolite has a high silica-to-alumina ratio and a low level of metallic impurities is also disclosed. The zeolite and methods of the invention are particularly useful for removing trace water from acid gases such as hydrogen chloride and hydrogen bromide.
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Cooper Gerald
Fraenkel Dan
Funke Hans H.
Matheson Tri-Gas, Inc.
Spitzer Robert
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