초록 ▼

A process for converting a hydrocarbon fraction comprises a step a) for treating a hydrocarbon feed in the presence of hydrogen in at least one three-phase reactor, containing at least one hydrotreatment catalyst in an ebullating bed, operating in riser mode of liquid and of gas, the reactor compris

A process for converting a hydrocarbon fraction comprises a step a) for treating a hydrocarbon feed in the presence of hydrogen in at least one three-phase reactor, containing at least one hydrotreatment catalyst in an ebullating bed, operating in riser mode of liquid and of gas, the reactor comprising at least one means located close to the bottom of the reactor for extracting catalyst from the reactor and at least one means located close to the top of the reactor for adding fresh catalyst to the reactor, a step b) for treating at least a portion of the effluent from step a) in the presence of hydrogen in at least one reactor containing at least one hydrocracking catalyst in a fixed bed under conditions for producing an effluent with a reduced sulphur content, and a step c) in which at least a portion of the product from step b) is sent to a distillation zone from which a gaseous fraction, a gasoline type engine fuel fraction, a diesel type engine fuel fraction and a liquid fraction which is heavier than the diesel type fraction are recovered. The process can also comprise a step d) for catalytic cracking of the heavy fraction obtained from step c).

대표청구항 ▼

[ What is claimed is:] [1.] A process for converting a hydrocarbon feed fraction with a sulphur content of at least 0.05% by weight with an initial boiling point of at least 300.degree. C. and an end point of at least 400.degree. C., comprising the following steps:a) treating the hydrocarbon feed in

[ What is claimed is:] [1.] A process for converting a hydrocarbon feed fraction with a sulphur content of at least 0.05% by weight with an initial boiling point of at least 300.degree. C. and an end point of at least 400.degree. C., comprising the following steps:a) treating the hydrocarbon feed in a hydrotreatment section in the presence of hydrogen, said section comprising at least one three-phase reactor, containing at least one ebullating bed of hydrotreatment catalyst the mineral support of which is at least partially amorphous, functioning in riser mode for liquid and for gas, extracting catalyst from a location near the bottom of the reactor and adding fresh catalyst to said reactor at a location near the top of the reactor, and withdrawing resultant hydrotreated effluent from said reactor;a1) splitting the resultant hydrotreated effluent into a heavy liquid fraction and a lighter fraction, and recovering said lighter fraction;b) sending at least a portion of the heavy liquid fraction from step a1) to a hydrocracking section for treatment in the presence of hydrogen, said section comprising at least one reactor containing at least one fixed bed of hydrocracking catalyst comprising a mineral support, under hydrocracking conditions for producing an effluent with a reduced sulphur content and a higher middle distillates content; andb1) separating to at least partially eliminate fines contained in either the effluent from step a) before introducing the effluent from step a) into a1) or the heavy liquid fraction from step a1) before introducing the heavy liquid fraction into step b).