More Open Access Journals: SCIRP

“Before I refuse to take your questions, I have an opening statement.”-- Ronald Reagan (American 40th US President (1981- 89), 1911-2004)

Today’s Tip: Add SCIRP-Scientific Research Publishing (http://www.scirp.org) to your bookmarks.
SCIRP is an academic publisher of open access journals. It also publishes academic books and conference proceedings. SCIRP currently has more than 200 open access journals in the areas of science, technology and medicine.

One of the journals in its stable …

Advances in Chemical Engineering and Science

And here is one of that journal’s articles …

Chemical Treatment to Recover Molybdenum and Vanadium from Spent Heavy Gasoil Hydrodesulfurization Catalyst
Author(s)
Alma Delia Rojas-Rodríguez, Orlando Flores-Fajardo, Fabiola Selene Alcántar González,Néstor Noé López Castillo, Modesto Javier Cruz Gómez
A. Delia Rojas-Rodríguez, O. Flores-Fajardo, F. Selene Alcántar González, N. Noé López Castillo and M. Javier Cruz Gómez
Advances in Chemical Engineering and Science, Vol. 2 No. 3, 2012, pp. 408-412. doi: 10.4236/aces.2012.23050.
ABSTRACT
Large quantities of spent hydrodesulfurization (HDS) catalysts are available from petrochemical industry. Disposal of spent catalyst is a problem as it falls under the category of hazardous industrial waste due to its vanadium concentration. Most of these catalysts are usually supported on alumina containing a variable percentage of elements such as nickel or molybdenum. Hence these catalysts contain environmentally critical, and economically valuable metals such as molyb denum, vanadium, and, nickel. In this paper, a spent HDS catalyst was treated with caustic soda solution. Parameters such as temperature, time, and NaOH solution concentration have been studied thoroughly, in order to settle the appropriate conditions for the maximum recovery of molybdenum and vanadium. Under the best leaching conditions (20 %w NaOH, room temperature, 2 h) about 95% recovery of Mo and V was achieved, and the recovery of nickel obtained was of 99% in the form of NiAlO₄.