摘要:
A catalyst composition comprising molybdenum, vanadium, antimony niobium, at least one element select from the group consisting of titanium, tin, germanium, zirconium, and hafnium, and at least one lanthanide selected from the group consisting of lanthanum, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium; with the proviso that catalyst contains germanium (in the absence of at last one of titanium, tin, zirconium, hafnium) only in combination with neodymium and/or praseodymium and no other lanthanides. Such catalyst compositions are effective for the gas-phase conversion of propane to acrylonitrile and isobutane to methacrylonitrile (via ammoxidation).
摘要:
A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula:VSb.sub.m A.sub.a D.sub.d O.sub.xwhereA is one or more Ti, Sn, where Sn is always presentD is one or more Li, Mg, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Al and Mn whereinm is 0.5 to 10a is greater than zero to 10d is zero to 10x is determined by the oxidation state of the cations present,comprising making an aqueous slurry of a mixture of source batch materials comprising compounds of said elements to be included in the final catalyst, followed by drying and heat calcining the mixture to an active catalyst, wherein the source batch material for the tin is a solution which comprises SnO.sub.2 .multidot.xH.sub.2 O wherein x.gtoreq.0 dispersed in tetraalkyl ammonium hydroxide wherein the tetraalkyl ammonium hydroxide is defined by the following formula:C.sub.n H.sub.2n+1 NOHwherein 5.gtoreq.n.gtoreq.1,drying said slurry and calcining the mixture to an upper calcination temperature of at least 500.degree. C.
摘要:
A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula:VSb.sub.m A.sub.a D.sub.d O.sub.xwhereA is one or more Ti, Sn, where Sn is always presentD is one or more Li, Mg, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Al and Mn whereinm is 0.5 to 10a is greater than zero to 10d is zero to 10x is determined by the oxidation state of the cations present,comprising making an aqueous slurry of a mixture of source batch materials comprising compounds of said elements to be included in the final catalyst, followed by drying and heat calcining the mixture to an active catalyst, wherein the source batch material for the tin is a solution which comprises SnO.sub.2.xH.sub.2 O wherein x.gtoreq.0 dispersed in tetraalkyl ammonium hydroxide wherein the tetraalkyl ammonium hydroxide is defined by the following formula:C.sub.n H.sub.2n+1 NOHwherein 5.gtoreq.n.gtoreq.1,drying said slurry and calcining the mixture to an upper calcination temperature of at least 500.degree. C.
摘要:
A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula: VSb.sub.m A.sub.a D.sub.d O.sub.x where A is one or more Ti, Sn, where Sn is always present D is one or more Li, Mg, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Al and Mn wherein m is 0.5 to 10 a is greater than zero to 10 d is zero to 10 x is determined by the oxidation state of the cations present, comprising making an aqueous slurry of a mixture of source batch materials comprising compounds of said elements to be included in the final catalyst, followed by drying and heat calcining the mixture to an active catalyst, wherein the source batch material for the tin is a solution which comprises SnO.sub.2.xH.sub.2 O wherein x.gtoreq.0 dispersed in tetraalkyl ammonium hydroxide wherein the tetraalkyl ammonium hydroxide is defined by the following formula: C.sub.n H.sub.2n+1 NOH wherein 5.gtoreq.n.gtoreq.1, drying said slurry and calcining the mixture to an upper calcination temperature of at least 500.degree. C.
摘要:
A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula: VSbmAaDdOx where A is one or more Ti, Sn, where Sn is always present D is one or more Li, Mg, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Al and Mn wherein m is 0.5 to 10 a is greater than zero to 10 d is zero to 10 x is determined by the oxidation state of the cations present, comprising making an aqueous slurry of a mixture of source batch materials comprising compounds of said elements to be included in the final catalyst, followed by drying and heat calcining the mixture to an active catalyst, wherein the source batch material for the tin is a solution which comprises SnO2.xH2O wherein x≧0 dispersed in tetraalkyl ammonium hydroxide wherein the tetraalkyl ammonium hydroxide is defined by the following formula: CnH2n+1NOH wherein 5≧n≧1, drying said slurry and calcining the mixture to an upper calcination temperature of at least 500° C.
摘要:
An ammoxidation catalyst characterized by the following empirical formula comprising:VSb.sub.a Sn.sub.b Ti.sub.c Fe.sub.d O.sub.xwhere1.ltoreq.a.ltoreq.1.80.ltoreq.b.ltoreq.0.350.ltoreq.c.ltoreq.0.150 1.2then 0