B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/28 (2006.01) B01D 53/04 (2006.01) B01D 53/26 (2006.01) B01J 20/18 (2006.01)
Patent
CA 2047328
APPARATUS AND METHOD FOR AIR DRYING WITH REDUCED OXYGEN ENRICHMENT ABSTRACT OF THE DISCLOSURE Adsorbers used to dry air frequently contain 4A or 13X molecular sieve zeolites, which are intermittently reactivated by thermal regeneration. When a thermally regenerated adsorber is repressurized, nitrogen adsorbs preferentially relative to oxygen in activated 4A and 13X molecular sieve zeolites. This produces an oxygen-enriched, high pressure gas within the adsorber vessel which emerges immediately after the adsorber is brought on line. The oxygen- enriched, high pressure gas can cause fires, explosions, and other deleterious effects in and downstream of such adsorber vessels. This invention provides thermally regenerated air driers, adsorbent chambers and air drying processes using adsorbent compositions that do not adsorb nitrogen preferentially to oxygen. Thermally regenerated air driers, adsorbers and drying processes using such adsorbent compositions prevent the problems associated with transient oxygen enrichment.
Schoofs Gregory R.
Schoofs Richard J.
Schoofs Gregory R.
Schoofs Richard J.
Smart & Biggar
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