Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1978-10-25
1980-06-17
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252411R, 252416, 2604653, B01J 2394, B01J 2730, C07C12002
Patent
active
042083036
ABSTRACT:
A process for regenerating a deteriorated iron-antimony oxide containing catalyst comprising as essential components (i) iron, (ii) antimony, (iii) at least one element selected from the group consisting of vanadium, molybdenum and tungsten and (iv) tellurium, having the crystalline structure of an iron-antimony oxide compound, being substantially free of free antimony trioxide (Sb.sub.2 O.sub.3) and containing at least 50 wt % of the original tellurium content of the fresh catalyst which comprises calcining said catalyst under a non-reducing atmosphere at a temperature of from about 600.degree. to 950.degree. C. and in the vicinity of or lower than the final calcining temperature used for producing the catalyst.
REFERENCES:
patent: 3668147 (1972-06-01), Yoshino et al.
patent: 3716496 (1973-02-01), Yoshino et al.
patent: 3988359 (1976-10-01), Saito
patent: 4052333 (1977-10-01), Lee
patent: 4083804 (1978-04-01), Saito et al.
"Oxidation of Propylene by Means of SnO.sub.2.MoO.sub.3 Catalysts", J. Buiten, Journal of Catalysis, 10 (1968), pp. 188-199.
Ikeda Yoneichi
Nakamura Toshio
Sasaki Yutaka
Tashiro Masaharu
Konopka P. E.
Nitto Chemical Industry Co. Ltd.
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