Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1978-01-27
1979-08-14
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252413, 252414, 260575, 260689, B01J 2396, B01J 2120
Patent
active
041644816
ABSTRACT:
Noble metal catalysts are regenerated according to a process comprising the steps of washing the deactivated catalyst with a polar organic solvent; contacting the washed catalyst with a hot aqueous alkali metal hydroxide solution; contacting the catalyst with an oxygen-containing gas at moderately elevated temperatures; and washing the catalyst a final time with a polar organic solvent. This method of regenerating the catalyst is particularly useful to reactivate palladium on carbon catalysts deactivated in the reduction of nitrophenol compounds to aminophenols.
REFERENCES:
patent: 2749359 (1956-06-01), Calkins et al.
patent: 3079435 (1963-02-01), Freifelder et al.
patent: 3214385 (1965-10-01), Kolyer
patent: 3576767 (1971-04-01), Summers
patent: 3824193 (1974-07-01), Williams
patent: 3901822 (1975-08-01), Browning
patent: 3959382 (1976-05-01), Yeh et al.
Chemical Abstracts - 81; 127336S, 1974, Matzuzawa et al., "Reclaiming a Catalyst by Treating with Aqueous Alkali, Oxidizing then Reducing".
Chem. Abs. - 81; 127337T, 1974, Matzuzawa et al., "Reclaiming a Catalyst by Treating with Aqueous Alkali and Reducing".
Ma King W.
Malek Russell A.
Potts Irvin W.
Glenn Michael L.
Konopka P. E.
The Dow Chemical Company
LandOfFree
Process of regenerating a noble metal catalyst used in the reduc does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process of regenerating a noble metal catalyst used in the reduc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of regenerating a noble metal catalyst used in the reduc will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1376081