METHOD OF REGENERATING CATALYTIC SYSTEMS OF HYDROGENATION PROCESSES Russian patent published in 2007 - IPC B01J38/14 B01J29/90 

FIELD: petroleum processing.

SUBSTANCE: method is accomplished by burning out carbon-containing compounds in oxygen-containing gas medium and comprises stages: desorption of hydrocarbons from catalyst surface performed in plant reactor and burning out of hydrocarbon thickening products performed on a special installation in indirect-heating rotary kiln at 450-550°C and excessive pressure 0.4-1.0 bar. Desorption of hydrocarbons from catalyst surface is carried out in a hydrogen-containing gas medium with 60-80 vol % H2, while gradually raising temperature from 200-220°C to 380-400°C at a rate 35-30°C/h following by aging of catalysts at 380-400°C until concentration of hydrocarbons in hydrogen-containing gas is no higher than 0.5 wt %, after which temperature is lowered to 100-120°C at a rate 20-25°C/h and active catalyst components are passivated. Passivation is accomplished by treatment at 100-120°C and excessive pressure 4-10 bar with mixture of inert gas and oxygen-containing gas, in particular carbon dioxide and/or air used in amount providing oxygen concentration in gas mixture 0.02-0.5 vol %, which corresponds to consumption of gas mixture 400-600 nm³/m³ catalyst. Treatment is conducted until oxygen concentrations at inlet and outlet of reactor are leveled.

EFFECT: enabled industrially feasible maximally possible restoration of catalyst activity with minimum destruction loss of catalyst.

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