EP0573316B1 - Procédé et dispositif de craquage catalytique dans deux zones réactionnelles successives - Google Patents
Procédé et dispositif de craquage catalytique dans deux zones réactionnelles successives Download PDFInfo
- Publication number
- EP0573316B1 EP0573316B1 EP93401080A EP93401080A EP0573316B1 EP 0573316 B1 EP0573316 B1 EP 0573316B1 EP 93401080 A EP93401080 A EP 93401080A EP 93401080 A EP93401080 A EP 93401080A EP 0573316 B1 EP0573316 B1 EP 0573316B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reactor
- process according
- load
- catalyst
- reaction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G51/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more cracking processes only
- C10G51/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more cracking processes only plural serial stages only
- C10G51/026—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more cracking processes only plural serial stages only only catalytic cracking steps
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/14—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts
- C10G11/18—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts according to the "fluidised-bed" technique
Definitions
- the present invention relates to a method and a device for cracking catalytic of hydrocarbon charges.
- reaction product is then subjected to separation, for example in a cyclone, so as to obtain, on the one hand, a gaseous hydrocarbon phase and, on the other hand, the catalyst.
- the catalyst is regenerated then at least in part recycled to the cracking reactor.
- the applicant proposes a method and a device for using a cracking reactor having a downflow reaction zone followed by an upward flow reaction zone, which allows to cumulate the advantages of an efficient reaction and a solid / gas separation improved.
- a device can also be installed on the units existing with lower costs than those due to changes in direction of the flow.
- the subject of the invention is a process for cracking hydrocarbon feedstocks, the cracking reaction taking place in the presence of entrained or fluidized bed catalyst, the catalyst particles being, after reaction, separated from the gas phase, regenerated and at least in part recycled, process in which the cracking reaction takes place in two zones substantially vertical successive reactions, the charge being introduced at the upper part of a first reaction zone, then a part at less of the product obtained at the bottom of said first zone is introduced into a second reaction zone where it circulates so ascending.
- Figures 2 and 3 show devices associated with said method.
- the particle flow rates of the catalyst between the reactor (3) and the first zone reaction (4) are adjusted by a pressure difference caused by example in a valve, or any other suitable means.
- the catalyst enters with a speed greater than 0.5 m / s and generally greater than 1 m / s, being able to go up to 20 m / s more generally up to 5 m / s.
- the apparent density of the suspended catalyst is then about 50 to 600 kg / m 3 .
- the load (5) previously heated to temperatures between 100 and 250 ° C. is then introduced into contact with the hot catalyst in a fluidized bed, in the form of fine droplets with a diameter generally between 20 and 300 ⁇ m (micrometers), most often obtained from known means atomization.
- the hydrocarbon charges to be treated are advantageously made up heavy hydrocarbons, i.e. with final boiling points around 700 ° C, such as vacuum gas oils, but also more heavy such as crude oils and vacuum residues. These charges may, if applicable, have received prior treatment, for example a hydrotreating in the presence of a Co-Mo type catalyst. Light loads can also be processed, which have lower boiling points at 400 ° C.
- the preferred fillers for the process according to the invention contain fractions normally boiling up to 700 ° C and above, and may contain high percentages of asphalt products, Conradson carbon content up to 4% and even beyond. These charges may possibly be mixed with lighter hydrocarbon cuts, such as LCOs and HCO.
- the charge Upon contact with the catalyst, the charge vaporizes. She is then trained by the catalyst current with which it flows in downward cocurrent in this first reaction zone (4) where the cracking takes place in part (the speed of the downflow in the reactor varies and is the most often between 0.5 to 50 m / s and preferably 0.5 to 10 m / s).
- the product obtained at the bottom of said first reaction zone (4) is transferred, at least in part and preferably in whole, to the lower part the second reaction zone (6) located in the axis reactor (7) substantially vertical.
- the invention also provides adapted devices described below (U-shaped tubes, inclined ).
- the reaction medium flows into the second reaction zone so ascending, with speeds generally greater than 2 m / s and capable of going up to 50 m / s, and preferably between 10 and 30 m / s.
- This fluid can be one or more naphtha generally a liquid with a boiling point lower than that of the feed, which allows the calories to be removed from the reaction zone.
- a hydrocarbon phase (8).
- the amount of hydrocarbon phase introduced relative to the amount of charge introduced into the first reaction zone represents 0 to 50% by weight, and preferably 5 to 30%.
- the hydrocarbon phase can consist of part of the charge to treat. It can also be a light load, i.e. a load of boiling point below 400 ° C, and most often around 180 ° C at about 380 ° C.
- the product obtained at the top of the reaction zone (6) is transferred to a solid / gas separation means (9) to obtain, on the one hand, the gas phase (10) containing the cracked products, and on the other hand the catalyst.
- the separated catalyst particles are transferred to at least one regeneration reactor (3), where the coke is burned in a conventional manner, then a at least part of the particles is recycled to the first reaction zone.
- Another object of the invention is a device for carrying out the method of catalytic cracking of hydrocarbon feed according to the process object of the invention.
- the device is described from Figures 2 and 3.
- Said device comprises a first reactor (20) with a substantially vertical axis provided with means (21) for introducing the catalyst into the upper part of the reactor, of means (24) for the introduction of the atomized charge to be treated in the upper part of the reactor, said means (24) being located below means (21), and said reactor also being provided with an opening arranged at the bottom of the reactor and along its axis, for the evacuation of the product obtained, said device further comprising a second axis reactor (28) substantially vertical, provided at its lower part with an opening for the introduction of the product obtained at the bottom of the first reactor (20) and provided at its upper part with a pipe (29) for the evacuation of the product obtained after treatment in the second reactor, said device also comprising at least one pipe (30) connecting the parts lower of the first and second reactors.
- It includes the two successive reactors (20) and (28) with a substantially axis vertical, the lower parts of which are connected by a pipe (30).
- the catalyst is introduced by means (21) generally consisting of a pipe (22) provided with a slide valve (23) arranged on the axis of the reactor.
- the charge to be treated is introduced, in atomized form, by means (24), generally constituted by a pipe (25) provided with a means of atomization (26).
- This pipe opens below the opening through which introduced the catalyst, so as to introduce the charge into the catalyst downward movement.
- the product obtained at the lower part (27) of the first reactor is transferred by line (30) to the second reactor.
- the pipe (30) - or the pipes if necessary - must allow a rapid transfer and with a low deposit of solid catalyst.
- FIG. 3 represents a pipe (30) inclined towards the second reactor, the transfer takes place by training.
- This configuration is particularly interesting because it approaches the current configuration of the catalytic cracking, the charge being injected in the most recent recent processes generally in (32) and / or in (42).
- the parts (20) and (30) are then not reaction zones and play a role purely functional in the transport of the catalyst. It is possible to maintain in place in the part (30) one or more means (42) of injection-atomization of the hydrocarbon charge, which makes it possible to inject possibly a fraction of hydrocarbons to be converted in the part ascending.
- Said means (42) can be constituted simply by a pipe provided with injection means and arranged for example in the lower part of the second reactor (line (42) and / or (32) shown in FIG. 3) or proximity to this part.
- said means are constituted by vents (34) arranged on the pipe (30) so that the direction of the injection follows the movement of the catalyst (injection substantially tangential). This embodiment makes it possible to significantly reduce the deposits.
- the device can also include, at the bottom of the second reactor (28) or nearby, a pipe (33) for the introduction of a fluid training.
- This fluid may for example be a hydrocarbon preferably liquid or gaseous, water or an inert gas such as for example nitrogen.
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Claims (18)
- Procédé de craquage de charge d'hydrocarbures, au contact de catalyseur en lit entraíné ou fluidisé, les particules de catalyseur étant après réaction séparées de la phase gazeuse, régénérées et au moins en partie recyclées, ledit procédé étant caractérisé en ce que la réaction de craquage se déroule dans deux zones réactionnelles successives sensiblement verticales, la charge s'écoulant depuis le haut vers le bas de la première zone, puis, une partie au moins du produit obtenu à l'issue de ladite première zone est introduit dans une seconde zone réactionnelle où il circule de manière ascendante.
- Procédé selon la revendication 1, caractérisé en ce que la totalité du produit obtenu à l'issue de la première zone est introduit dans la seconde zone réactionnelle.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que la charge entrant dans la zone réactionnelle descendante est constituée par des hydrocarbures lourds.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que la charge entrant dans la zone réactionnelle descendante est constituée par des hydrocarbures légers à point d'ébullition inférieur à 400 °C.
- Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une phase hydrocarbonée est introduite dans le milieu réactionnel entrant dans la seconde zone réactionnelle.
- Procédé selon la revendication 5, caractérisé en ce que la phase hydrocarbonée est identique à la charge à traiter.
- Procédé selon la revendication 5, caractérisé en ce que la phase hydrocarbonée est une phase légère à point d'ébullition inférieur à 400 °C.
- Procédé selon la revendication 7, caractérisé en ce que la phase hydrocarbonée est une phase légère à point d'ébullition compris entre 180 et 380 °C.
- Procédé selon l'une des revendications 5 à 8, caractérisé en ce que la quantité de phase hydrocarbonée introduite représente 0 à 50 % du volume de la charge introduite dans la première zone réactionnelle.
- Procédé selon la revendication 9, caractérisé en ce que cette quantité va de 5 à 30 % du volume de la charge.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un fluide d'entraínement est introduit à la partie inférieure de la seconde zone réactionnelle.
- Procédé selon l'une des revendications 1 à 11, caractérisé en ce que l'écoulement descendant du catalyseur et de la charge entraínée a lieu avec une vitesse de 0,5-50m/s et l'écoulement ascendant du milieu réactionnel avec une vitesse de 2-50m/s.
- Procédé selon l'une des revendications 1 à 12, caractérisé en ce que l'écoulement descendant du catalyseur et de la charge entraínée a lieu avec une vitesse de 0,5-10m/s
- Procédé selon l'une des revendications 1 à 13, caractérisé en ce que l'écoulement ascendant du milieu réactionnel a lieu à une vitesse de 10-30m/s.
- Dispositif pour le craquage catalytique de charge d'hydrocarbures, comportant un premier réacteur (20) d'axe sensiblement vertical muni de moyen (21) pour l'introduction du catalyseur dans la partie supérieure du réacteur, de moyen (24) pour l'introduction de la charge atomisée dans la partie supérieure du réacteur et situé en-dessous du moyen (21), ledit réacteur (20) étant muni également d'une ouverture pour l'évacuation du produit obtenu et disposée à la partie inférieure du réacteur selon son axe, ledit dispositif étant caractérisé en ce qu'il comporte en outre un second réacteur (28) d'axe sensiblement vertical, muni à sa partie inférieure d'une ouverture pour l'introduction du produit obtenu à la partie inférieure du premier réacteur (20) et muni à sa partie supérieure d'une conduite (29) pour l'évacuation du produit obtenu à l'issue du traitement dans ledit second réacteur, lesdits premier et second réacteurs (20) et (28) étant reliés à leur partie inférieure par au moins une conduite (30).
- Dispositif selon la revendication 15, caractérisé en ce qu'il comporte des moyens (32) et/ou (42) pour l'introduction d'une phase hydrocarbonée dans le milieu réactionnel du second réacteur.
- Dispositif selon la revendication 16, caractérisé en ce que les moyens d'introduction d'une phase hydrocarbonée sont constitués par au moins une conduite (32) disposée à la partie inférieure du second réacteur.
- Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comporte des moyens (33) pour l'introduction d'un fluide d'entraínement à la partie inférieure du second réacteur (28).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9205714A FR2690922B1 (fr) | 1992-05-07 | 1992-05-07 | Procede et dispositif de craquage catalytique dans deux zones reactionnelles successives. |
FR9205714 | 1992-05-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0573316A1 EP0573316A1 (fr) | 1993-12-08 |
EP0573316B1 true EP0573316B1 (fr) | 1998-07-22 |
Family
ID=9429682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93401080A Expired - Lifetime EP0573316B1 (fr) | 1992-05-07 | 1993-04-26 | Procédé et dispositif de craquage catalytique dans deux zones réactionnelles successives |
Country Status (8)
Country | Link |
---|---|
US (1) | US5498326A (fr) |
EP (1) | EP0573316B1 (fr) |
JP (1) | JP3345690B2 (fr) |
KR (1) | KR100251425B1 (fr) |
CA (1) | CA2095794C (fr) |
DE (1) | DE69319800T2 (fr) |
ES (1) | ES2120487T3 (fr) |
FR (1) | FR2690922B1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6299759B1 (en) | 1998-02-13 | 2001-10-09 | Mobil Oil Corporation | Hydroprocessing reactor and process with gas and liquid quench |
FR2785907B1 (fr) * | 1998-11-13 | 2001-01-05 | Inst Francais Du Petrole | Procede et dispositif de craquage catalytique comprenant des reacteurs a ecoulements descendant et ascendant |
US6339181B1 (en) | 1999-11-09 | 2002-01-15 | Exxonmobil Chemical Patents, Inc. | Multiple feed process for the production of propylene |
FR2811327B1 (fr) * | 2000-07-05 | 2002-10-25 | Total Raffinage Distribution | Procede et dispositif de craquage d'hydrocarbures mettant en oeuvre deux chambres reactionnelles successives |
AU2003236150A1 (en) | 2002-04-26 | 2003-11-10 | China Petroleum And Chemical Corporation | Downflow catalytic cracking reactor and use thereof |
US7087154B2 (en) * | 2002-12-30 | 2006-08-08 | Petroleo Brasileiro S.A. - Petrobras | Apparatus and process for downflow fluid catalytic cracking |
US8435401B2 (en) | 2009-01-06 | 2013-05-07 | Process Innovators, Inc. | Fluidized catalytic cracker with active stripper and methods using same |
RU2705236C1 (ru) * | 2018-12-24 | 2019-11-06 | Армен Каренович Мартиросян | Виброакустическое устройство для реализации коронарной эндартерэктомии |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2307879A (en) * | 1941-07-12 | 1943-01-12 | Standard Oil Dev Co | Catalytic conversion process |
NL198169A (fr) * | 1954-06-28 | |||
US3607730A (en) * | 1968-04-05 | 1971-09-21 | Pullman Inc | Apparatus and method for conversion of hydrocarbons |
US3826738A (en) * | 1972-03-23 | 1974-07-30 | F Zenz | Folded transfer line reactor |
US4385985A (en) * | 1981-04-14 | 1983-05-31 | Mobil Oil Corporation | FCC Reactor with a downflow reactor riser |
FR2626284B1 (fr) * | 1988-01-26 | 1990-06-08 | Total France | Appareil pour le craquage catalytique en lit fluidise d'une charge d'hydrocarbures |
WO1989007010A1 (fr) * | 1988-01-29 | 1989-08-10 | Thacker Milton P | Appareil et procede de craquage catalytique fluide a profile bas |
-
1992
- 1992-05-07 FR FR9205714A patent/FR2690922B1/fr not_active Expired - Fee Related
-
1993
- 1993-04-26 DE DE69319800T patent/DE69319800T2/de not_active Expired - Fee Related
- 1993-04-26 ES ES93401080T patent/ES2120487T3/es not_active Expired - Lifetime
- 1993-04-26 EP EP93401080A patent/EP0573316B1/fr not_active Expired - Lifetime
- 1993-05-07 KR KR1019930007799A patent/KR100251425B1/ko not_active IP Right Cessation
- 1993-05-07 CA CA002095794A patent/CA2095794C/fr not_active Expired - Fee Related
- 1993-05-07 US US08/057,795 patent/US5498326A/en not_active Expired - Fee Related
- 1993-05-07 JP JP10691093A patent/JP3345690B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR930023442A (ko) | 1993-12-18 |
FR2690922B1 (fr) | 1994-07-22 |
ES2120487T3 (es) | 1998-11-01 |
CA2095794A1 (fr) | 1993-11-08 |
FR2690922A1 (fr) | 1993-11-12 |
DE69319800T2 (de) | 1998-11-26 |
JPH0633073A (ja) | 1994-02-08 |
DE69319800D1 (de) | 1998-08-27 |
JP3345690B2 (ja) | 2002-11-18 |
CA2095794C (fr) | 2003-10-07 |
US5498326A (en) | 1996-03-12 |
EP0573316A1 (fr) | 1993-12-08 |
KR100251425B1 (ko) | 2000-04-15 |
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