Verfahren zum Regenerieren von Katalysatoren auf Wismutmolybdat- und Wismutwolframat-Basis

Verfahren zum Regenerieren von Katalysatoren auf Wismutmolybdat- und Wismutwolframat-Basis

Heat-degraded bismuth-containing catalysts are regenerated by contact with concentrated ammonium hydroxide. Contact may be by immersing or slurrying the catalyst in NH4OH or causing the reagent to flow over the catalyst. The catalyst may be supported on SiO2, Al2O3 or ball clay. Additionally the cat...

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Bibliographische Detailangaben
1. Verfasser: RIESSER GREGOR HANS
Format: Patent
Sprache:ger
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Zusammenfassung:Heat-degraded bismuth-containing catalysts are regenerated by contact with concentrated ammonium hydroxide. Contact may be by immersing or slurrying the catalyst in NH4OH or causing the reagent to flow over the catalyst. The catalyst may be supported on SiO2, Al2O3 or ball clay. Additionally the catalyst may contain one of Mo, Cu, P, Si, S. Fe, Sn, Pb, As, Sb, Ag, Te and Co.