Arsenic promoted vanadium-antimony-oxide based catalyst for selective paraffin ammoxidation
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United States of America Patent
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Dec 19, 2000
Grant Date -
N/A
app pub date -
Feb 8, 1999
filing date -
Feb 8, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process of manufacturing acrylonitrile or methacrylonitrile by the catalytic reaction in the vapor phase of a paraffin selected from propane and isobutane with molecular oxygen and ammonia by catalytic contact of the reactants in a reaction zone with a catalyst, the feed composition having a mole ratio of the paraffin to ammonia in the range of from about 2.5 to 16 and a mole ratio of paraffin to oxygen in the range of from about 1.0 to 10, wherein said catalyst has the elements in the proportions indicated by the empirical formula: VSb.sub.m A.sub.a D.sub.b Q.sub.q R.sub.r O.sub.x where A is one or more of Ti, Sn, Fe, Cr and Ga; D is one or more of Li, Mg, Ca, Sr, Ba, Co, Ni, Zn, Ge, Zr, Cu, Ta, Bi, Ce, In, B and Mn; Q is one or more of Mo, W, and Nb; R is one or more of As, Te, and Se; m equals 0.8 to 4; a equals 0.01 to 2; d is 0 to 2; 0.ltoreq.q<0.01; preferably 0
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