| abstract |
The present invention relates to a catalyst comprising coke characterised in that said coke, upon analysis by infrared spectroscopy in diffuse reflection ("Diffuse Reflectance Infrared Fourier Transform Spectroscopy" - DRIFTS), has at least two peaks at a wavelength comprised between 1450 cm-1 and 1700 cm-1. The aforesaid catalyst comprising coke can be advantageously used in a process for the production of a diene, preferably a conjugated diene, more preferably 1,3-butadiene, said process comprising the dehydration of at least one alkenol having a number of carbon atoms greater than or equal to 4. Preferably, said alkenol having a number of carbon atoms greater than or equal to 4 can be obtained directly from biosynthetic processes, or through catalytic dehydration processes of at least one diol. When said alkenol is a butenol, said diol is preferably a butanediol, more preferably 1,3-butanediol, even more preferably bio-1, 3- butanediol, i.e. 1,3-butanediol deriving from biosynthetic processes. When said diol is 1,3-butanediol, or bio-1, 3-butanediol, the diene obtained with the process according to the present invention is, respectively, 1,3-butadiene, or bio-1, 3-butadiene. |