Catalyst for ethane odh
AssigneeNOVA Chemicals (International) S.A.
InventorsVasily Simanzhenkov, Xiaoliang Gao, David Jeffrey Sullivan, Leonid Modestovich Kustov, Aleksey Victorovich Kucherov, Elena Dmitrievna Finashina
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Abstract
A catalyst for oxidative dehydrogenation (ODH) of ethane with an empirical formula Mo—V—Te—Nb—Pd—O produced using a process comprising impregnation of the Pd component on the surface of the catalyst following a calcination step using a Pd compound free of halogens. The resulting catalyst can be used in both diluted and undiluted ODH processes and shows higher than expected activity without any loss of selectivity.
Claims20
A process for preparing an oxidative dehydrogenation catalyst comprising a mixed metal oxide having the empirical formula
- MoaVbTecNbdPdeOf
- wherein
- a, b, c, d, e and f are the relative atomic amounts of the elements Mo, V, Te, Nb, Pd and O, respectively;
- and
- when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, 0.001<e≦0.10 and f is dependent on the oxidation state of the other elements;
- the process comprising:
- i) admixing compounds of elements Mo, V, Te, and Nb, in a solvent comprising water to produce a first mixture;
- ii) heating said first mixture in a first pressurized vessel at a temperature of from 100° C. to 200° C., for from 6 hours to 240 hours;
- iii) recovering first insoluble material from said first pressurized vessel;
- iv) subjecting said first recovered insoluble material to a calcining under an inert atmosphere to produce a calcined product;
- v) then, impregnating said calcined product from iv) with an aqueous solution of a Pd compound free of halogens to form second mixture;
- vi) subjecting said second mixture to drying at a temperature of from 50° C. to 150° C., for from 1 hour to 48 hours;
- and
- vii) recovering second insoluble material from vi) to obtain a catalyst.
An oxidative dehydrogenation catalyst comprising a mixed metal oxide having the empirical formula
- MoaVbTecNbdPdeOf
- wherein
- a, b, c, d, e and f are the relative atomic amounts of the elements Mo, V, Te, Nb, Pd and O, respectively;
- and
- when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, 0.001<e≦0.10 and f is dependent on the oxidation state of the other elements;
- prepared by a process comprising:
- i) admixing compounds of elements Mo, V, Te, and Nb, in a solvent comprising water to produce a first mixture;
- ii) heating said first mixture in a first pressurized vessel at a temperature of from 100° C. to 200° C., for from 6 hours to 240 hours;
- iii) recovering first insoluble material from said first pressurized vessel;
- iv) subjecting said first recovered insoluble material to a calcining under an inert atmosphere to produce a calcined product;
- v) then, impregnating said calcined product from iv) with an aqueous solution of a Pd compound free of halogens to form second mixture;
- vi) subjecting said second mixture to drying at a temperature of from 50° C. to 150° C., for from 1 hour to 48 hours;
- and
- vii) recovering second insoluble material from vi) to obtain a catalyst.
Dependencies are inferred from the claim text.