Process for the selective desulphurization of olefinic gasolines, comprising a hydrogen purification step
OwnerLaurent Bournay, Arnaud Baudotinventors
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Abstract
The invention concerns a process for selective hydrodesulphurization of an olefinic gasoline, in which makeup hydrogen and/or the overall feed at the inlet to the catalytic reactor has a CO content of less than 50 ppmv of even less, but a COx(═CO+½CO2) content of more than 120 ppmv. The invention allows diversification as regards the sources of makeup hydrogen and/or can simplify the purification treatment for said hydrogen, and/or can reduce the purge of hydrogen from the hydrodesulphurization unit.
Claims19
A process for hydrodesulphurization of a hydrocarbon cut HC comprising at least 5% by weight of olefins, in which said hydrocarbon cut, a stream HYD of makeup hydrogen and optionally a stream REC of recycle hydrogen are mixed to form an overall feed which is supplied to the inlet to at least one reactor comprising a desulphurization catalyst, under operating conditions that can transform the organic sulphur-containing compounds of the HC cut into H2S, in which the source or sources of hydrogen forming the stream HYD is selected, and optionally at least one hydrogen purification treatment is carried out on HYD, REC or a mixture thereof such that said overall feed comprises at most 50 ppmv of CO and at least 120 ppmv of COx, where COx═CO+½CO2.
Dependencies are inferred from the claim text.