Halogen promoted multi-metal oxide catalyst
AssigneeRohm and Haas Company
InventorsSanjay Chaturvedi, Anne Mae Gaffney, Scott Han, Michele Doreen Heffner, Ruozhi Song
Life of this patent
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Abstract
A catalyst comprising a promoted mixed metal oxide is useful for the vapor phase oxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated nitrile.
Claims4
A process for producing an unsaturated nitrile, which comprises subjecting an alkane, or a mixture of an alkane and an alkene, and ammonia to a vapor phase catalytic oxidation reaction in the presence of a catalyst containing a promoted mixed metal oxide having the empirical formula
- AaMbNcXdZeOf
- wherein A is at least one element selected from the group consisting of Mo and W, M is at least one element selected from the group consisting of V and Ce, N is at least one element selected from the group consisting of Te, Sb and Se, X is at least one element selected from the group consisting of Nb, Ta, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Sb, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Hf, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, and Z is an element selected from the group consisting of Br, Cl, F and I;
- and wherein, when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d =0.01 to 1.0, e=0.001 to 1.0 and f is dependent on the oxidation state of said other elements.
A process for producing an unsaturated nitrile, which comprises subjecting an alkane, or a mixture of an alkane and an alkene, and ammonia to a vapor phase catalytic oxidation reaction in the presence of a catalyst produced by the process comprising:
- (1) admixing compounds of elements A. M. N. X and Z and at least one to form an admixture, wherein A is at least one element selected from the group consisting of Mo and W, M is at least one element selected from the group consisting of V and Ce, N is at least one element selected from the group consisting of Te, Sb and Se, X is at least one element selected from the group consisting of Nb, Ta, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Hf, Pb, P, Pm, Eu, Gd, Dv, Ho, Er, Tm, Yb and Lu, and Z is an element selected from the aroun consisting of Br, Cl, F and I;
- and wherein the elements A, M, N, X and Z are present in such amounts that the atomic ratio of A:M:N:X:Z is 1:0.01 to 1.0:0.01 to 1.0:0.01 to 1.0:0.001 to 0.1;
- (2) removing said at least one solvent from the admixture to obtain a catalyst precursor:
- and
- (3) calcining said catalyst precursor.
A process for producing an unsaturated nitrile, which comprises subjecting an alkane, or a mixture of an alkane and an alkene, and ammonia to a vapor phase catalytic oxidation reaction in the presence of a catalyst produced by the process comprising:
- (1) admixing compounds of elements A, M, N and X and at least one solvent to form an admixture, wherein A is at least one element selected from the group consisting of Mo and W, M is at least one element selected from the aroun consisting of V and Ce, N is at least one element selected from the group consisting of Te, Sb and Se, and X is at least one element selected from the group consisting of Nb, Ta, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Hf, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, and wherein the elements A, M, N and X are present in such amounts that the atomic ratio of A:M:N:X is 1:0.01 to 1.0:0.01 to 1.0:0.01 to 1.0;
- (2) removing said at least one solvent from the admixture to obtain a catalyst precursor:
- and
- (3) calcining said catalyst orecursor in the presence of a source of halogen, wherein said halogen is Br, Cl, F or I.
A process for producing an unsaturated nitrite, which comprises subjecting an alkane, or a mixture of an alkane and an alkene, and ammonia to a vapor phase catalytic oxidation reaction in the presence of a catalyst produced by the process comprising:
- (1) admixing compounds of elements A, M, N and X and at least one solvent to form an admixture, wherein A is at least one element selected from the group consisting of Mo and W, M is at least one element selected from the group consisting of V and Ce, N is at least one element selected from the group consisting of Te, Sb and Se, and X is at least one element selected from the group consisting of Nb, Ta, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Ma, Ca, Sr, Ba, Ra, Hf, Pb, P, Pm, Eu, Gd, Dv, Ho, Er, Tm, Yb and Lu, and wherein the elements A, M, N and X are present in such amounts that the atomic ratio of A:M:N:X is 1:0.01 to 1.0:0.01 to 1.0:0.01 to 1.0;
- (2) removing said at least one solvent from the admixture to obtain a catalyst precursor:
- (3) calcining said catalyst precursor;
- and
- (4) contacting said calcined precursor with a source of halogen, wherein said halogen is Br, Cl, F or I.
Dependencies are inferred from the claim text.