Iron-antimony-containing metal oxide catalyst composition and process for producing the same
AssigneeNitto Chemical Industry Co., Ltd.
InventorsYutaka Sasaki, Hiroshi Utsumi, Kenichi Miyaki
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Abstract
A composition which contains as essential components: crystalline iron antimonate and at least one element selected from the group consisting of vanadium, molybdenum, and tungsten; is useful as a catalyst in the oxidation reaction of organic compounds. Also, a process for producing the composition is disclosed.
Claims11
An iron.antimony-containing metal oxide catalyst composition consisting essentially of iron, antimony, and at least one element selected from the group consisting of vanadium, molybdenum, and tungsten which is represented by empirical formula:
- Fe.sub.a Sb.sub.b V.sub.c Mo.sub.d W.sub.e Q.sub.f R.sub.g P.sub.h O.sub.i
- wherein Q represents at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Ce, Pr, Nd, Sm, Th, U, Ti, Zr, Hf, Nb, Ta, Cr, Mn, Re, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt, Cu, Ag, Au, Zn, Cd, Hg, Al, Ga, In, Tl, Ge, Sn, and Pb;
- R represents at least one element selected from the group consisting of B, As, Bi, and Se;
- and a, b, c, d, e, f, g, h, and i each represent an atomic ratio of the respective element, wherein
- a is from 5 to 15,
- b is from 5 to 100,
- the sum of c, d, and e is from 3 to 15, provided that (i) when the sum of c and e is 0, d/a is more than 1, (ii) when the sum of c and e is not 0, (c +e)/a is more than 0.3,
- f is from 0 to 15,
- the sum of g and h is from 0 to 10, provided that when h is not 0, (c +d +e)/h is more than 1, and
- i is a number of oxygen atom as determined corresponding to the oxides formed by combining the above components,
- said catalyst composition containing a crystalline iron antimonate.
A process for producing an iron.antimony-containing metal oxide catalyst composition consisting essentially of iron, antimony, and at least one element selected from the group consisting of vanadium, molybdenum, and tungsten which is represented by empirical formula:
- Fe.sub.a Sb.sub.b V.sub.c Mo.sub.d W.sub.e Q.sub.f R.sub.g P.sub.h O.sub.i
- wherein Q represents at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Ce, Pr, Nd, Sm, Th, U, Ti, Zr, Hf, Nb, Ta, Cr, Mn, Re, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt, Cu, Ag, Au, Zn, Cd, Hg, Al, Ga, In, Tl, Ge, Sn, and Pb;
- R represents at least one element selected from the group consisting of B, As, Bi, and Se;
- and a, b, c, d, e, f, g, h, and i each represent an atomic ratio of the respective element, wherein
- a is from 5 to 15,
- b is from 5 to 100,
- the sum of c, d, and e is from 3 to 15, provided that (i) when the sum of c and e is 0, d/a is more than 1, (ii) when the sum of c and e is not 0, (c +e)/a is more than 0.3,
- f is from 0 to 15,
- the sum of g and h is from 0 to 10, provided that when h is not 0, (c +d +e)/h is more than 1, and
- i is a number of oxgen atom as determined corresponding to the oxides formed by combining the above components,
- said catalyst composition containing a crystalline iron antimonate, which comprises the steps of:
- (a) preparing a slurry essentially containing (i) crystalline iron antimonate and (ii) at least one element selected from the group consisting of vanadium, molybdenum, and tungsten or a slurry containing essential components (i) and (ii), and (iii) at least one element selected from the group consisting of the catalyst components represented by Q, R and P;
- (b) drying said aqueous slurry;
- and
- (c) calcining said dried material to provide said metal oxide catalyst.
Dependencies are inferred from the claim text.