# US 5,345,019 A · Method of hydrocracking paraffins emanating from the Fischer-Tropsch process using catalysts based on H-Y zeolite > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,345,019 A - Document ID: US5345019A - Status: Granted - Kind: A - Application number: 07/886,225 - Filed: 1992-05-21 - Granted: 1994-09-06 - Earliest claimed: 1991-05-21 - Assignees: Institut Francais du Petrole - Inventors: Pierre-Henri Bigeard; Alain Billon; Pierre Dufresne; Samuel Mignard - Web page: https://patentgrep.com/patent/US5345019A ## CPC - C10G 65/10: including only cracking steps - Y10S 585/946: Product is waxy polymer - 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 - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A method of hydrocracking charges emanating from the Fischer-Tropsch process, in which: (a) hydrogen is reacted with the charge in contact with a catalyst 1 in a first reaction zone, the said catalyst 1 comprising at least one alumina-based matrix and at least one hydro-dehydrogenation component; (b) the effluent from the first reaction zone is put into contact with a catalyst 2 in a second reaction zone, the said catalyst 2 comprising: 20 to 97% by weight of at least one matrix; 3 to 80% by weight of at least one Y zeolite in hydrogen form, the said zeolite being characterized by an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of over 4.5:1, a sodium content of less than 1% by weight determined on a zeolite calcined at 1100.degree. C.; an a.sub.o crystal parameter of the elemental mesh of less than 24.70.times.10.sup.-10 m; and a specific surface area determined by the BET method of over 400 m.sup.2.g.sup.-1 ; and at least one hydro-dehydrogenation component. ## Claims ### Claim 1 A method of hydrocracking a charge emanating from the Fisher-Tropsch process, said charge comprising unsaturated and oxygenated hydrocarbon molecules, said method comprising: (a) reacting hydrogen with the charge in contact with a first catalyst in a first reaction zone, the first catalyst comprising at least one matrix consisting essentially of alumina and at least one first hydro-dehydrogenation component to remove unsaturated and oxygenated hydrocarbon molecules from the charge; (b) contacting the resultant effluent from the first reaction zone with a second catalyst in a second reaction zone, the second catalyst comprising: 20 to 97% by weight of at least one matrix; 3 to 80% by weight of at least one Y zeolite in hydrogen form, said Y zeolite having a SiO.sub.2 :Al.sub.2 O.sub.3 molar ratio of over 4.5:1, a sodium content of less than 1% by weight determined on a zeolite calcined at 1100.degree. C., an a.sub.0 crystal parameter of the elemental mesh of less than 24.70.times.10.sup.-10 m; and a specific surface area determined by the BET method of over 400 m.sup.2.g.sup.-1 ; and at least one second hydro-dehydrogenation component, to produce a hydrocracked product. ### Claim 2 (depends on 1) A method according to claim 1, in which the Y zeolite has a SiO.sub.2 :Al.sub.2 O.sub.3 molar ratio of 8:1 to 70:1; a sodium content of less than 0.5% by weight determined on a zeolite calcined at 1100.degree. C.; an a.sub.o crystal parameter of the elemental mesh of 24.24.times.10.sup.-10 to 24.55 .times.10.sup.-10 m; and a specific surface area determined by the BET method of over 500 m.sup.2.g.sup.-1. ### Claim 3 (depends on 1) A method according to claim 1, in which the first and second hydro-dehydrogenation components are each independently a combination of at least one metal or metal compound from Group VIII and at least one metal or metal compound from Group VI of the Periodic Table of elements. ### Claim 4 (depends on 3) A method according to claim 3 in which, the second hydro-dehydrogenation component is used in stage (b) in an amount of 5 to 40% by weight relative to the total second catalyst, the weight ratio, expressed as metal oxides, of Group VIII to Group VI metals being from 0.05:1 to 0.8:1 and, first hydro-dehydrogenation component is used in stage (a) in an amount of 5 to 40% by weight relative to the total first catalyst, the weight ratio, expressed as metal oxides, of Group VIII to Group VI metals being from 1.25:1 to 20:1. ### Claim 5 (depends on 1) A method according to claim 1, in which the first and second hydro-dehydrogenation components are each independently at least one metal or metal compound from Group VIII of the Periodic Table. ### Claim 6 (depends on 3) A method according to claim 3, in which one or both of the hydro-dehydrogenation components further comprises phosphorus. ### Claim 7 (depends on 6) A method according to claim 6, in which the phosphorus content, expressed as the weight of phosphorus oxide P.sub.2 O.sub.5 relative to the total first or second catalyst, is below 15%. ### Claim 8 (depends on 1) A method according to claim 1, in which at least part of the effluent from the second reaction zone is recycled to the entrance of one of the first or second reaction zone. ### Claim 9 (depends on 8) A method according to claim 8, in which recycling is to the entrance of the second reaction zone. ### Claim 10 (depends on 2) A method according to claim 2, in which the first and second hydro-dehydrogenation components are each independently a combination of at least one metal or metal compound from Group VIII and at least one metal or metal compound from Group VI of the Periodic Table of elements. ### Claim 11 (depends on 10) A method according to claim 10, in which one or both of the hydro-dehydrogenation components further comprises phosphorus. ### Claim 12 (depends on 2) A method according to claim 2, in which the first and second hydro-dehydrogenation components are each independently at least one metal or metal compound from Group VIII of the Periodic Table. ### Claim 13 (depends on 12) A method according to claim 12, in which one or both of the hydro-dehydrogenation components further comprises phosphorus. ### Claim 14 (depends on 10) A method according to claim 10 in which, the second hydro-dehydrogenation component is used in stage (b) in an amount of 5% to 40% by weight relative to the total second catalyst, the weight ratio, expressed as metal oxides, of Group VIII to Group VI metals being from 0.05:1 to 0.8:1 and, the first hydro-dehydrogenation component is used in stage (a) in an amount of 5% to 40% by weight relative to the total first catalyst, the weight ratio, expressed as metal oxides, of Group VIII to Group VI metals being from 1.25:1 to 20:1. ### Claim 15 (depends on 5) The method of claim 5, wherein the second hydro-dehydrogenation component is used in stage (b) is a noble Group VIII metal present in an amount of 0.01 to 5% by weight relative to the total weight of the second catalyst. ### Claim 16 (depends on 5) The method of claim 5, wherein the second hydro-dehydrogenation component used in stage (b) is a non-noble Group VIII metal present in an amount of 0.01 to 155 by weight relative to the total weight of the second catalyst. ### Claim 17 (depends on 12) The method of claim 12, wherein the second hydro-dehydrogenation component used in stage (b) is a noble Group VIII metal present in an amount of 0.01 to 5% by weight relative to the total weight of the second catalyst. ### Claim 18 (depends on 12) The method of claim 12, wherein the second hydro-dehydrogenation component used in stage (b) is a non-noble Group VIII metal present in an amount of 0.01 to 15% by weight relative to the total weight of the second catalyst.