02-02-2017 дата публикации
Номер: US20170029717A1
A process for the hydrotreatment of a hydrocarbon feedstock in which: 1. A process for the hydrotreatment of a hydrocarbon feedstock comprising sulphurous and nitrogenous compounds , in which the following steps are effected:{'b': 9', '400, 'a) at least one hydrotreatment step is implemented in which at least a part of said feedstock and a gaseous flow comprising hydrogen is brought into contact with at least one hydrotreatment catalyst to obtain a hydrotreated effluent (,) comprising hydrogen, and sulphurous and nitrogenous compounds;'}{'b': 9', '400', '23', '240', '11', '600, 'b) gas/liquid separation of said hydrotreated effluent (,) obtained in step a) is implemented to produce at least one first gaseous effluent (,) and at least one first liquid effluent (,);'}{'b': 11', '600', '11', '600', '41', '410', '43', '430, 'c) the first liquid effluent (,) obtained in step b) is expanded to a pressure of between 0.5 and 4 MPa and said first liquid effluent (,) is separated to obtain at least one second gaseous effluent (,) comprising hydrogen and sulphurous and nitrogenous compounds, and at least one second liquid effluent (,);'}{'b': 41', '410', '41', '410', '49', '490', '45', '450, 'd) said second gaseous effluent (,) obtained in step c) and comprising hydrogen and sulphurous and nitrogenous compounds is cooled and then separation of said second gaseous effluent (,) is effected to obtain at least one third gaseous effluent (,) comprising hydrogen, sulphurous and nitrogenous compounds and at least one third liquid effluent (,); and'}{'b': 49', '490, 'e) at least a part of said third gaseous effluent (,) obtained in step d) comprising hydrogen and sulphurous and nitrogenous compounds is recycled to step a) as a gaseous flow comprising hydrogen provided to step a).'}230301. A process according to characterised in that in step e) said part of said third gaseous effluent is mixed with a gaseous hydrogen make-up flow ( claim 1 ,).3. A process according to characterised in ...
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