Patent ID: 6355856
Filing Date: 2002-03-12
Classification: B01J,C07C

Abstract:
A molybdenum oxide/silica catalyst prepared by a process, comprising:i) dissolving a soluble molybdenum salt in an aqueous solution containing at least one basic compound selected from the group consisting of ammonium hydroxides having formula (I): R1R2R3R4N+OHâˆ’â€ƒâ€ƒ(I) â€ƒwherein groups R1-R4, the same or different, represent aliphatic groups containing from 1 to 7 carbon atoms; ii) adding to the solution of step (i) at least one compound of silicon capable of hydrolyzing to SiO2 in such quantities as to give a molar ratio Mo/Si greater than 0.2 and, optionally, an aliphatic alcohol; and iii) gelling the mixture thus obtained and calcining the gel obtained in air at a temperature ranging from 500 to 600Â° C., thereby preparing a catalyst having a surface area of 20 to 400 m2/g and a molar ratio of Mo/Si>0.2.