Appeal No. 94-3287
Application 07/835,152
withdrawn from further consideration by the examiner as being
directed to non-elected inventions.
The subject matter on appeal relates to a process for the
manufacture of maleic anhydride in a reactor, the feed flow
channel of which contains an autoignition suppression agent in
contact with the n-butane and air reactant mixture. The agent
comprises an ignition inhibiting component selected from the
group consisting of acid sites and trivalent phosphorus. This
appealed subject matter is adequately illustrated by independent
claims 1, 26 and 27 which read as follows:
1. In a process for the manufacture of maleic anhydride by
catalytic oxidation of n-butane over a vanadium/phosphorus oxide
catalyst comprising mixing n-butane with an oxygen-containing gas
and passing the resulting mixture over said catalyst in a
catalytic reaction zone, the improvement which comprises:
mixing n-butane and air in a reactor feed flow
channel to produce a mixture containing at least
about 1.7% by volume n-butane at a pressure of at
least about 20 psig, said feed flow channel
containing an autoignition suppression agent in
contact with said mixture, said autoignition
suppression agent comprising an ignition
inhibiting component selected from the group
consisting of acid sites and trivalent phosphorus.
26. In a process for the manufacture of maleic anhydride by
catalytic oxidation of n-butane over a vanadium/phosphorus oxide
catalyst comprising mixing n-butane with air and passing the
resulting mixture over said catalyst in a catalytic reaction
zone, the improvement which comprises:
2
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