Catalyst regeneration in a dehydrogenation process
AssigneeABB Lummus Crest Inc.
InventorsRobert J. Feldman, Joseph M. Dufallo, William A. Schwartz, Theodore S. Williams
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Abstract
In a dehydrogenation process wherein catalyst is regenerated off-stream by use of heated air, at least two reactors are in the regeneration cycle, with regeneration air being heated to regeneration catalyst temperature for introduction into the first reactor, and thereafter being reheated to catalyst regeneration temperature and introduced into the second reactor. Such air may also be employed for preheating feed to the dehydrogenation reactor and/or for steam generation by heating such air to the temperature required for such procedure.
Claims8
In a dehydrogenation process which employs a plurality of reactors each containing a dehydrogenation catalyst wherein the dehydrogenation catalyst requires periodic regeneration by contact with heated gas and wherein the reactors are cycled between use on-stream for dehydrogenation and use off-stream for regenerating catalyst, the improvement comprising:
- regenerating catalyst off-stream in at least two reactors, the first of which is in a second portion of a catalyst regeneration cycle and the second of which is in a first portion of a catalyst regeneration cycle;
- heating gas to a catalyst regeneration temperature and introducing such heated gas into the first reactor for heating and regenerating catalyst therein;
- reheating gas obtained from the first reactor to a catalyst regeneration temperature and introducing such reheated gas into the second reactor for heating and regenerating catalyst therein;
- and
- after completion of the second portion of the regeneration cycle, removing the first reactor from the regeneration cycle for subsequent use on-stream and placing the second reactor in the second portion of the regeneration cycle.
Dependencies are inferred from the claim text.