Patent ID: 6677494
Filing Date: 2004-01-13
Classification: B01J,C10G

Abstract:
A process for preparing an aromatic compound from a hydrocarbon fraction that contains naphthenes with a catalyst in one or more catalytic beds, said process comprising at least the following successive stages: treating the hydrocarbon fraction in the presence of hydrogen and implementing a reaction to dehydrogenate naphthenes; separating a gas effluent that contains hydrogen to form recycling gas, liquid and catalyst; regenerating the catalyst; reducing the catalyst and reintroducing the catalyst to the one or more catalytic beds; wherein reduction of the catalyst is carried out at a temperature of 450Â° C. to 550Â° C. in the presence of the recycling gas which has impurities in excess of 10% and contains hydrogen in an amount whereby the amount of pure hydrogen provided is between 1-10 kg/kg of catalyst.