Method of producing maleic anhydride

Details Method of producing maleic anhydride Method of producing maleic anhydride

1978-05-22

1980-08-19

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D30760

Patent

active

042183839

ABSTRACT:
A catalyst for, and method of, producing a reaction product predominantly of maleic anhydride, that is a product of reaction containing a ratio of maleic to citraconic anhydrides of at least 25 to 1, respectively, and preferably greater than about 100 to 1, respectively, by reacting a feed stream consisting of oxygen or an oxygen-containing gas and an organic C.sub.5 feed predominantly of piperylene and dicyclopentadiene, and preferably predominantly dicyclopentadiene, at bath temperatures of from about 360.degree. to about 450.degree. C. over a catalyst comprising a mixture of 25 to 60 weight percent titanium oxide (TiO.sub.2), 5 to 40 weight percent molybdenum oxide (MoO.sub.3) and 30 to 60 weight percent vanadium oxide (V.sub.2 O.sub.5) on an alpha alumina or alumina-silica carrier having less than about one square meter per gram (<1 m.sup.2 /g) surface area. The feed rate of the reactants is preferably between about 1,500 and about 15,000 gas hourly space velocity; the C.sub.5 hydrocarbon content of the feed gases being between about 0.5 and 1.8 volume percent.

REFERENCES:
patent: 2704778 (1955-03-01), Maisel
patent: 3106569 (1963-10-01), Robinson
patent: 4065470 (1977-12-01), Bacha et al.
Yamamoto et al., Seikiyu Gakkai Shi, 1972, vol. 15 (11), pp. 932-935 (and translation).

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