Regeneration or reactivation of catalysts, in general

BPERFORMING OPERATIONS TRANSPORTING B01Physical, chemical processing B01JCHEMICAL OR PHYSICAL PROCESSES

B01J38/00Regeneration or reactivation of catalysts, in general

B01J38/02Heat treatment B01J38/04Gas or vapour treating Treating by using liquids vaporisable upon contacting spent catalyst B01J38/06using steam B01J38/08using ammonia or derivatives thereof B01J38/10using elemental hydrogen B01J38/12Treating with free oxygen-containing gas B01J38/14with control of oxygen content in oxidation gas B01J38/16Oxidation gas comprising essentially steam and oxygen B01J38/18with subsequent reactive gas treating B01J38/20Plural distinct oxidation stages B01J38/22Moving bed B01J38/24having mainly transverse B01J38/26having mainly counter-current flow of oxygen-containing gas and material B01J38/28having mainly concurrent flow of oxygen-containing gas and material B01J38/30in gaseous suspension B01J38/32Indirectly heating or cooling material within regeneration zone or prior to entry into regeneration zone B01J38/34with plural distinct serial combustion stages B01J38/36and with substantially complete oxidation of carbon monoxide to carbon dioxide within regeneration zone B01J38/38and adding heat by solid heat carrier B01J38/40and forming useful by-products B01J38/42using halogen-containing material B01J38/44and adding simultaneously or subsequently free oxygen using oxyhalogen compound B01J38/46fluorine-containing B01J38/48Liquid treating or treating in liquid phase B01J38/485Impregnating or reimpregnating with, or deposition of metal compounds or catalytically active elements B01J38/50using organic liquids B01J38/52oxygen-containing B01J38/54halogen-containing B01J38/56Hydrocarbons B01J38/58and gas addition thereto B01J38/60using acids B01J38/62organic B01J38/64using alkaline material using salts B01J38/66using ammonia or derivatives thereof B01J38/68including substantial dissolution or chemical precipitation of a catalyst component in the ultimate reconstitution of the catalyst B01J38/70Wet oxidation of material submerged in liquid B01J38/72including segregation of divers particles B01J38/74utilising ion-exchange