# US 8,771,501 B2 · Elimination of chlorine compounds from hydrocarbon cuts > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,501 B2 - Document ID: US8771501B2 - Status: Granted - Kind: B2 - Application number: 12/989,278 - Filed: 2009-03-27 - Published: 2011-02-17 - Granted: 2014-07-08 - Earliest claimed: 2008-04-25 - Assignees: Ifp Energies Nouvelles - Applicants: Jean Cosyns; Olivier Ducreux; Quentin Debuisschert; Fabienne Le Peltier - Inventors: Jean Cosyns; Olivier Ducreux; Quentin Debuisschert; Fabienne Le Peltier - Web page: https://patentgrep.com/patent/US8771501B2 ## CPC - C10G 45/04: characterised by the catalyst used - B01D 53/04: with stationary adsorbents {(B01D53/025 takes precedence)} - B01D 53/75: Multi-step processes - B01D 53/8662: {Organic halogen compounds} - C10G 25/003: {Specific sorbent material, not covered by C10G25/02 or C10G25/03} - C10G 35/04: Catalytic reforming - C10G 45/10: containing platinum group metals or compounds thereof - C10G 69/08: including at least one step of reforming naphtha - B01D 2253/104: Alumina - B01D 2255/1021: Platinum - B01D 2255/1023: Palladium - B01D 2255/202: Alkali metals - B01D 2255/204: Alkaline earth metals - B01D 2257/2045: Hydrochloric acid - B01D 2257/2064: Chlorine - C10G 2300/201: Impurities - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract The invention concerns a process for purification by elimination of chlorine in the form of hydrogen chloride and organochlorine compounds by contacting in the presence of hydrogen of at least a part of the effluent from a reforming, aromatics production, dehydrogenation, isomerisation or hydrogenation zone, said part of the effluent comprising olefins, hydrogen chloride and organochlorine compounds, on an elimination zone comprising a chain arrangement of two masses, the first mass being a mass comprising at least one metal from group VIII deposited on a mineral carrier and the second mass being a hydrogen chloride adsorbent. ## Claims ### Claim 1 A process for purification of at least a part of an effluent from a reforming zone said effluent comprising olefins, hydrogen chloride and organochlorine compounds by elimination of chlorine in the form of hydrogen chloride and organochlorine compounds, said process comprising contacting in the presence of hydrogen a part of the effluent in an elimination zone comprising a serial arrangement of two masses, the first mass being a mass comprising palladium impregnated on a mineral carrier and the second mass being a hydrogen chloride adsorbent, wherein said mineral carrier of said first mass consists of balls or cylindrical extrudates which consist of alumina and said palladium is present on said carrier at essentially only in a skin thickness of generally between 100 and 700 microns representing not more than 80% of the radius of said beads or extrudates. ### Claim 2 (depends on 1) A process for purification by elimination of chlorine according to claim 1 wherein at least a part of the effluent from the reforming zone circulates through a gas-liquid separator, said separator leading to a flow of gas rich in hydrogen (A) and a liquid effluent (B), said liquid effluent being passed to a stabilisation zone, said stabilisation zone providing at least two cuts, a first light cut (C) and a first heavy cut (D), said first heavy cut being passed to a fractionating column leading to the production of at least two cuts, a second light cut (E1) taken off at the column head, which cut (E1) can be passed to a benzene hydrogenation zone, and a second heavy cut (F), a purification zone integrated with any flow coming from the gas-liquid separator, a stabilisation column or the fractionating column. ### Claim 3 (depends on 2) A process for purification by elimination of chlorine according to claim 2 wherein said fractionating column leads to the production of at least three cuts, a second light cut (E1) taken off at the column head, a cut (E2) taken off between the column head and the supply of the column, each of which cuts (E1) and (E2) can be passed to a benzene hydrogenation zone, and a second heavy cut (F). ### Claim 4 (depends on 3) A process for purification by elimination of chlorine according to claim 3 wherein the purification zone is integrated with the flow of gas which is rich in hydrogen (A), the liquid effluent (B) or at least one of the cuts (E1) or (E2). ### Claim 5 (depends on 1) A process for purification by elimination of chlorine according to claim 1 wherein the elimination zone is operated in the presence of hydrogen with a molar ratio of hydrogen to chlorine of higher than 5, at a temperature of between 25 and 350° C. and at a pressure of between 0.2 and 5 MPa. ### Claim 6 (depends on 1) A process for purification by elimination of chlorine according to claim 1 wherein the two masses of the elimination zone are either charged in the same reactor or in two different reactors. ### Claim 7 (depends on 1) A process for purification by elimination of chlorine according to claim 1 wherein when the second mass is saturated, said second mass is discharged separately while diverting the effluent from the reforming zone towards a third reactor comprising a hydrogen chloride adsorbent. ### Claim 8 (depends on 1) A process for purification by elimination of chlorine according to claim 1 wherein the hydrogen chloride adsorbent is an alumina promoted with an alkali metal or an alkaline earth metal. ### Claim 9 (depends on 1) A process according to claim 1, wherein the mineral carrier comprises alumina balls having a diameter of about 3 mm and a skin thickness of palladium at about 300 microns. ### Claim 10 (depends on 1) A process according to claim 1 wherein said skin thickness is on the order of about 10% of the diameter of the beads or extrudates. ### Claim 11 (depends on 1) A process according to claim 1 wherein said mineral carrier is impregnated with an aqueous or organic solution of a palladium precursor. ### Claim 12 (depends on 11) A process according to claim 11 wherein the precursor is palladium nitrate. ### Claim 13 (depends on 12) A process according to claim 12, wherein the mineral carrier comprises alumina balls having a diameter of about 3 mm and a skin thickness of palladium at about 300 microns.