Process for the recovery of a hydrogen-rich gas and a stabilized liquid
AssigneeInstitut Francais du Petrole
InventorsEric Sanchez, Beatrice Fischer
Life of this patent
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Abstract
Process for the treatment of a hydrocarbon mixture that comprises hydrogen, in which the mixture is separated at pressure P1 into a liquid L1 and a gas G1 that is compressed under a pressure P2 >2×P1; compressed gas G1**is then brought into contact with at least a portion of L1 so as to recover a liquid L2 and a hydrogen-rich gas G2; at least one stabilized liquid and a light liquid stream LL comprising primarily LPG, of which at least a portion is reduced in pressure and mixed with gas G1 to facilitate its compression, are recovered by fractionation from G1** and/or from L2. The invention also relates to a process for reforming hydrocarbons with such an effluent treatment.
Claims16
A process for the treatment of an effluent of a hydrocarbon conversion reaction, comprising a hydrocarbon liquid phase and a hydrogen-rich gaseous phase, in which:
- a) the feedstock is separated into a liquid L1 and a gas G1, under a pressure P1,
- b) at least a portion G1* of G1 is compressed under a pressure P2>2×P1 to obtain a gas stream G1** that is then brought into contact at a temperature that is less than or equal to 20° C. with at least a portion of L1, optionally after a partial condensation or a first contact with an absorbent liquid so as to recover a liquid L2 and a hydrogen-rich gas G2,
- c) L2 is then fractionated to obtain at least:
- a stabilized liquid L4a that is essentially free of LPG and lighter products, a liquid stream L4b that primarily comprises LPG, and a low-hydrogen fuel gas, and in which a light liquid stream LL that primarily comprises LPG, which after pressure reduction and at least partial re-evaporation, is mixed with gas G1* to increase its molecular weight before at least its final compression up to pressure P2, is recovered by fractionation of G1** and/or from L4b.
(canceled)
Dependencies are inferred from the claim text.