Molybdenum oxide on alumina

Hgure 4 Residual amounts of MoO, as determined by XRD as a function of Mo content for M0O3/7-AI2O3 mixtures after tliermal treatment at 720 K for 24 h.  

M0O3 and the support Y-AI2O3 prior to any thermal treatment so as to facilitate spreading and wetting. 

Low energy ion scattering (LEIS) is the most surface-sensitive technique available today and is therefore exceptionally well suited for the study of spreading and wetting in 

Reproduced with permission of Elsevier Science Publishers. 

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H-Coal A coal gasification process. Crushed coal is mixed with process-derived oil and catalytically hydrogenated in an ebullated bed under pressure at 455°C. The catalyst is a mixture of cobalt and molybdenum oxides on alumina. Developed by Hydrocarbon Research from the 1960s and piloted in Catlettsburg, KY, from 1980 to 1982. See also CSF, H-Oil, CSF, Synthoil. 

The first polymerizations were free radical reactions. In 1933 researchers at ICI discovered that ethene polymerizes into a branched structure that is now known as low density polyethene (LDPE). In the mid- 50s a series of patents were issued for new processes in which solid catalysts were used to produce polyethene at relatively low pressures. The first was granted to scientists at Standard Oil (Indiana) who applied nickel oxide on activated carbon and molybdenum oxide on alumina. Their research did not lead to commercial processes. In the late 40s Hogan and Banks of Phillips were assigned to study the di- and trimerization of lower olefins. The objective was to produce high octane motor fuels. When they tried a chromium salt as promoter of a certain catalyst (Cr was a known reforming... 

The catalysts developed for hydrotreating include cobalt, molybdenum, nickel, vanadium and tungsten oxides on alumina. Cobalt and molybdenum oxides on alumina catalysts are in greater use today, being highly selective, easy to regenerate and relatively resistant to poisons. 

Each catalyst is designed to be best suited to one type of feed or one type of treating goal. When hydrotreating is done for sulfur removal, the process is called hydrodesulfurization, and the catalyst generally is cobalt and molybdenum oxides on alumina. A catalyst of nickel-molybdenum compounds on alumina can be used for denitrogenation and cracked-stock saturation. 

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