CATALYST REGENERATING METHODS AND APPARATUSES AND METHODS OF INHIBITING CORROSION IN CATALYST REGENERATING APPARATUSES

摘要

Methods and apparatuses for regenerating catalysts and methods of inhibiting corrosion in catalyst regenerating apparatuses are provided. An exemplary apparatus includes: a metal vessel configured to receive a spent catalyst stream and contact at least a portion of the spent catalyst stream with an oxygen containing environment at a sufficiently high temperature to burn coke present in the spent catalyst stream; a refractory material overlying at least a portion of an inner surface of the metal vessel; and a corrosion inhibiting material in contact with at least a portion of the inner surface of the metal vessel and disposed between the inner surface and at least a portion of the refractory material, wherein the corrosion inhibiting material is heat stable at a temperature of at least up to about 400° F. (about 204° C.) and inhibits contact of an acid environment with the inner surface of the metal vessel.

主权项

1. A catalyst regenerating apparatus comprising:
a metal vessel having an inner surface and configured to receive a spent catalyst stream and an oxygen-containing gas, and to provide an oxygen containing environment at a sufficiently high temperature to burn coke present on the spent catalyst stream and generate regenerated catalyst, wherein the spent catalyst stream comprises catalyst having coke deposits; a refractory material overlying at least a portion of the inner surface of the metal vessel; and a corrosion inhibiting material overlying at least a portion of the inner surface of the metal vessel and disposed between the inner surface and at least a portion of the refractory material, wherein the corrosion inhibiting material is heat stable at a temperature of at least up to about 400° F. (about 204° C.) and inhibits contact of an acid environment with the inner surface of the metal vessel.