Mixed metal oxide catalyst and process for production of acetic acid
OwnerBrian Ellisinventor
Life of this patent
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Abstract
A catalyst composition and its use for the oxidation of ethane and/or ethylene to acetic acid, which composition comprises in combination with oxygen the elements molybdenum, vanadium, niobium and gold in the absence of palladium according to the empirical formula: MoaWbAucVdNbeYf (I), wherein Y is one or more elements selected from the group consisting of: Cr, Mn, Ta, Ti, B, Al, Ga, In, Pt, Zn, Cd, Bi, Ce, Co, Rh, Ir, Cu, Ag, Fe, Ru, Os, K, Rb, Cs, Mg, Ca, Sr, Ba, Zr, Hf, Ni, P, Pb, Sb, Si, Sn, Tl, U, Re, Te and La; and a, b, c, d, e and f represent the gram atom ratios of the elements such that: 0-5.
Claims11
A catalyst composition for the oxidation of ethane and/or ethylene to acetic acid, which composition comprises in combination with oxygen the elements molybdenum, vanadium, niobium and gold in the absence of palladium according to the empirical formula:
- MoaWbAucVdNbeYf(I),
- wherein Y is one or more elements selected from the group consisting of:
- Cr, Mn, Ta, Ti, B, Al, Ga, In, Pt, Zn, Cd, Bi, Ce, Co, Rh, lr, Cu, Ag, Fe, Ru, Os, K, Rb, Cs, Mg, Ca, Sr, Ba, Zr, Hf, Ni, P, Pb, Sb, Si, Sn, Tl, U, Re, Te and La;
- and
- a, b, c, d, e and f represent the gram atom ratios of the elements such that:
- 0<a≦1;
- 0≦b<1 and a+b=1;
- 10−5<c≧0.02;
- 0.4≦d≦0.865;
- 0.135≦e≦0.23;
- and 0.55≦d+e≦1;
- and
- 0≦f≦2.
3 A catalyst composition as claimed in claim 1 or claim 2, wherein a>0.01, 0.0001<c≦0.002, 0.425≦d≦0.8, 0.14≦e≦0.20, 0.6≦d+e≦0.95, and f≦0.2.
A catalyst composition as claimed in claim 3, wherein 0.0005<c≦0.001, 0.45≦d≦0.7, e≧0.15, d+e≦0.9, and f≦0.02.
Dependencies are inferred from the claim text.