Reference

Surface structure and functionality of bauxite-based catalysts in the hydrotreating of heavy crudes

Surface structure and functionality of bauxite-based catalysts in the hydrotreating of heavy crudes. Vecchi, Carmen; Marengo, Sergio; Iannibello, Antonio; Girelli, Alberto (Stn. Sper. Combust., San Donato Milanese 20097, Italy). Prepr. - Am. Chem. Soc., Div. Pet. Chem., 27(3), 732-41 (English) 1982. CODEN: ACPCAT. ISSN: 0569-3799. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 67 The use of bauxite instead of pure Al2O3 as a support for hydrocracking catalysts did not result in any drastic redn. of their activity. 1313-99-1 and 1313-27-5 which are cas registry numbers of chemicals are mentioned. In a series of catalysts tested by hydrocracking of an atm. residue (d15 0.92, pour point <-30°, S 4.2%) the catalyst activity decreased in the following order: com. CoO-MoO3/Al2O3 > NiO-MoO3/bauxite 3 CoO-MoO3/bauxite 3 NiO-WO3/bauxite > MoO3/bauxite > WO3/bauxite. .

Catalyst for simultaneous hydrodesulfurization and hydrodemetalization of heavy crude oils

Catalyst for simultaneous hydrodesulfurization and hydrodemetalization of heavy crude oils. Morales, Alfredo L.; Galiasso, Roberto E.; Huskey, Donald; Carrasquel, Rafael (Dep. Invest. Proc., INTEVEP, S. A., Caracas 1070A, Venez.). Rev. Tec. INTEVEP, 3(2), 135-40 (Spanish) 1983. CODEN: RTEIDT. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 67 A special Ni-Mo/Al2O3 catalyst for the simultaneous hydrodesulfurization (HDS) and hydrodemetalization (HDM) of heavy crude oils or residues contg. high S, metals, and asphaltenes was developed. The effect of physico-chem. properties on activities was studied. 1307-96-6 and 1313-99-1 are cas registry numbers of chemicals which are used as reagents here. Particle size affects more the HDS than the HDM. The mean pore radius limits the rate of HDM, whereas the total surface area only affects the HDS. Ni or Co used for promoting the HDS are not so important for HDM. The catalyst was prepd. at bench scale and tested in a fixed bed reactor for >6 mo. The spent catalyst still has a high concn. of surface Mo even after 220 days on stream. The refined petroleum had its concns. of asphaltene, S, and V reduced by 56, 62, and 77%, resp. .