Process for the regeneration of catalysts for the gas-phase redu

Details Process for the regeneration of catalysts for the gas-phase redu Process for the regeneration of catalysts for the gas-phase redu

1986-08-07

1987-12-22

Konopka, Paul E.

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

260689, 502 38, 502 51, 502 52, 564420, 564421, 564422, 564423, B01J 2396, B01J 2394, B01J 3816, C07C 4511

Patent

active

047146893

ABSTRACT:
Catalysts for the gas-phase reduction of aromatic nitro compounds to aromatic amines are regenerated by treatment of the catalyst, at elevated temperature, with a gas mixture which contains oxygen, inorganic and/or organic amines and/or nitrogen oxides and, where appropiate, steam.

REFERENCES:
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patent: 2822397 (1958-02-01), Winstrom
patent: 2891094 (1959-06-01), Karkalits, Jr. et al.
patent: 4164481 (1979-08-01), Ma et al.
Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd edition, vol. 5, p. 21 (1979).
Ullmanns Encyclopadie der Technischen Chemie (Ullman's Encyclopaedia of Industrial Chemistry), 4th edition, vol. 13, p. 565 (1977).
L. F. Albright, F. H. Van Munster and J. C. Forman, Chem. Eng., 251-259 (1967).
A. Schulz-Walz, D. C. Hempel, Z. Kricsfalussy and C. Rasp, Chem. Ing. Technik, 53, (8), 637-640 (1981).

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