Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Phosphorus or compound containing same
Reexamination Certificate
2006-06-13
2006-06-13
Lorengo, J. A. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Phosphorus or compound containing same
C100S215000, C100S342000, C100S344000, C100S345000
Reexamination Certificate
active
07060649
ABSTRACT:
Disclosed is a method for producing a catalyst containing vanadium, phosphorus, and oxygen, which is used for oxidizing the gas phase of a hydrocarbon having at least four carbon atoms to maleic anhydride. According to the inventive method, a corresponding catalyst precursor which contains vanadium, phosphorus, and oxygen and is provided with particles having an average diameter of at least 2 mm is converted into a catalytically active form by means of calcination, and a flow of the catalyst precursor is transported on a conveyor belt across at least one calcination area over a distance1nat an essentially steady speed in order to be calcinated. The variation over time of the gas temperature in relation to the set point value amounts to ≦5° C. at each position in the area of the flow of the catalyst precursor, which lies within the second half1n/2 of the calcination area, while the local difference in the gas temperature between any positions in the area of the flow of the catalyst precursor, which is located within the second half1n/2 of the calcination area, amounts to ≦5° C.
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Dobner Cornelia
Duda Mark
Felder Raimund
Storck Sebastian
Weiguny Jens
BASF - Aktiengesellschaft
Hailey Patricia L.
Lorengo J. A.
Voight Jason D.
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