Regeneration of platinum-rhenium reforming catalyst

Abstract

Abstract THE ACTIVITY AND STABILITY OF A DEACTIVATED REFORMING CATALYST CONTAINING A PLATINUM GROUP METAL AND RHENIUM ARE RESTORED TO THAT OF FRESH CATALYST BY (1) REMOVING SUBSTANTIALLY ALL CARBON FROM THE CATALYST; (2) CONTACTING THE CATALYST AT ABOUT 900* F. WITH A NON-REDUCING GAS CONTAINING HALOGEN, STEAM AND OXYGEN UNTIL ABOUT 85% WT. OF THE DESIRED HALIDE CONTENT IS ADDED; (3) DISCONTINUING THE USE OF STEAM AND OXYGEN FROM THE LAST-MENTIONED STEP UNTIL THE HALOGENATION IS COMPLETED; AND (4) DRYING AND REDUCING THE CATALYST WITH A HYDROGEN-CONTAINING GAS; THEN REUSING THE CATALYST IN A REFORMING PROCESS. PREFERABLY, THE CATALYST IS HALOGENATED TO A LEVEL ABOUT 20% GREATER THEN THAT OF FRESH CATALYST. IT IS ALSO PREFERRED THAT THE CATALYST THEN BE DRIED WITH A NON-REDUCING GAS AT ABOUT 900* F. UNTIL THE WATER CONTENT IN THE EXIT GAS IS BELOW 150 P.P.M.V. FOLLOWED BY REDUCING THE METALLIC OXIDES BY CONTACT WITH A HYDROGEN-CONTAINING GAS AT 700-900* F.

Inventors

• 👤 Vincent J Moravec Jr
• 👤 William K Meerbott

Bibliographic Details