Oxidative dehydrogenation catalysts

Abstract

Provided in this disclosure are oxidative dehydrogenation catalysts that include a mixed metal oxide having the empirical formula: Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d wherein d is a number to satisfy the valence of the oxide. The oxidative dehydrogenation catalyst is characterized by having XRD diffraction peaks (2θ degrees) at 22±0.2, 27±0.2, 28.0±0.2, and 28.3±0.1. The disclosure also provides methods of making the catalysts that include wet ball milling.

1 - 25 . (canceled) 
     
     
         26 . A method for preparing an oxidative dehydrogenation catalyst comprising a mixed metal oxide having the empirical formula:
   Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d      wherein d is a number to satisfy the valence of the oxide,   the method comprising:
 providing a mixture comprising a pretreated oxidative dehydrogenation catalyst and a water, and 
 wet ball milling the mixture to provide the oxidative dehydrogenation catalyst. 
   
     
     
         27 . The method of  claim 26 , wherein pretreated oxidative dehydrogenation catalyst has the empirical formula:
   Mo 1.0 V 0.12-0.49 Te 0.05-0.17 Nb 0.10-0.20 O d      wherein d is a number to satisfy the valence of the oxide.   
     
     
         28 . The method of  claim 26 , wherein the method further comprises providing the pretreated oxidative dehydrogenation catalyst. 
     
     
         29 . The method of  claim 28 , wherein providing the pretreated oxidative dehydrogenation catalyst comprises calcining a pre-calcined oxidative dehydrogenation catalyst. 
     
     
         30 . The method of  claim 29 , wherein calcining comprises calcining the pre-calcined oxidative dehydrogenation catalyst in an inert atmosphere at a temperature of about 450° C. to about 650° C. 
     
     
         31 . The method of  claim 29 , wherein calcining comprises calcining the pre-calcined oxidative dehydrogenation catalyst in an inert atmosphere at a temperature of about 600° C. 
     
     
         32 . The method of  claim 29 , wherein calcining comprises calcining the pre-calcined oxidative dehydrogenation catalyst in an inert atmosphere for about 1 hour to about 3 hours. 
     
     
         33 . The method of  claim 29 , wherein calcining comprises calcining the pre-calcined oxidative dehydrogenation catalyst in an inert atmosphere for about 2 hours. 
     
     
         34 . The method of  claim 29 , wherein calcining the catalyst comprises calcining the pre-calcined oxidative dehydrogenation catalyst in an inert atmosphere at a temperature of about 500° C. to about 700° C. for about 1 hour to about 3 hours. 
     
     
         35 . The method of  claim 29 , wherein calcining comprises calcining the pre-calcined oxidative dehydrogenation catalyst in an inert atmosphere at a temperature of about 600° C. for about 2 hours. 
     
     
         36 . The method of  claim 26 , wherein the method increases the amorphous phase of the catalyst about 5 wt. % to about 15 wt. %. 
     
     
         37 . The method of  claim 26 , wherein the method increases the amorphous phase of the catalyst about 10 wt. %.