WO2006067305A1 - Procede de conversion directe d’une charge comprenant des olefines a quatre et/ou cinq atomes de carbone, pour la production de propylene avec une co-production d’essence - Google Patents
Procede de conversion directe d’une charge comprenant des olefines a quatre et/ou cinq atomes de carbone, pour la production de propylene avec une co-production d’essence Download PDFInfo
- Publication number
- WO2006067305A1 WO2006067305A1 PCT/FR2005/003141 FR2005003141W WO2006067305A1 WO 2006067305 A1 WO2006067305 A1 WO 2006067305A1 FR 2005003141 W FR2005003141 W FR 2005003141W WO 2006067305 A1 WO2006067305 A1 WO 2006067305A1
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- WIPO (PCT)
- Prior art keywords
- unit
- oligocracking
- cut
- catalyst
- effluent
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 55
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 title claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title abstract description 12
- 150000001336 alkenes Chemical class 0.000 title description 21
- 125000004432 carbon atom Chemical group C* 0.000 title description 4
- 238000006384 oligomerization reaction Methods 0.000 claims abstract description 44
- 238000005984 hydrogenation reaction Methods 0.000 claims abstract description 23
- 238000004230 steam cracking Methods 0.000 claims abstract description 15
- 238000004523 catalytic cracking Methods 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims description 53
- 230000008569 process Effects 0.000 claims description 44
- 239000010457 zeolite Substances 0.000 claims description 33
- 229910021536 Zeolite Inorganic materials 0.000 claims description 25
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 25
- 238000004064 recycling Methods 0.000 claims description 20
- 238000004821 distillation Methods 0.000 claims description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 229910052763 palladium Inorganic materials 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 239000003377 acid catalyst Substances 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 239000011820 acidic refractory Substances 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
- 238000002386 leaching Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical class CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 abstract description 14
- 238000005336 cracking Methods 0.000 abstract description 5
- 150000001993 dienes Chemical class 0.000 description 14
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 10
- 239000005977 Ethylene Substances 0.000 description 10
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 10
- 239000012071 phase Substances 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 9
- 238000011069 regeneration method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 7
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229930195733 hydrocarbon Natural products 0.000 description 6
- 150000002430 hydrocarbons Chemical class 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 150000005673 monoalkenes Chemical class 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- -1 dienes (diolefins) Chemical class 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005649 metathesis reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 230000003606 oligomerizing effect Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000006276 transfer reaction Methods 0.000 description 2
- MHNNAWXXUZQSNM-UHFFFAOYSA-N 2-methylbut-1-ene Chemical class CCC(C)=C MHNNAWXXUZQSNM-UHFFFAOYSA-N 0.000 description 1
- YHQXBTXEYZIYOV-UHFFFAOYSA-N 3-methylbut-1-ene Chemical compound CC(C)C=C YHQXBTXEYZIYOV-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 241000269350 Anura Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000006641 Fischer synthesis reaction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 229910021398 atomic carbon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical class CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/02—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons
- C07C2/04—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation
- C07C2/06—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation of alkenes, i.e. acyclic hydrocarbons having only one carbon-to-carbon double bond
- C07C2/08—Catalytic processes
- C07C2/10—Catalytic processes with metal oxides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C11/00—Aliphatic unsaturated hydrocarbons
- C07C11/02—Alkenes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C11/00—Aliphatic unsaturated hydrocarbons
- C07C11/02—Alkenes
- C07C11/06—Propene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
- C07C4/02—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by cracking a single hydrocarbon or a mixture of individually defined hydrocarbons or a normally gaseous hydrocarbon fraction
- C07C4/06—Catalytic processes
-
- 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
- C10G50/00—Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation
-
- 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
- C10G69/00—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process
- C10G69/02—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process plural serial stages only
- C10G69/12—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process plural serial stages only including at least one polymerisation or alkylation step
-
- 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
- C10G69/00—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process
- C10G69/02—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process plural serial stages only
- C10G69/12—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process plural serial stages only including at least one polymerisation or alkylation step
- C10G69/126—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one other conversion process plural serial stages only including at least one polymerisation or alkylation step polymerisation, e.g. oligomerisation
-
- 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
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/02—Gasoline
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Definitions
- the invention relates to a process for converting at least a part of propylene a hydrocarbon feed comprising olefins whose carbon number is mainly equal to 4 or 5, this cut - which will be called in the following text cut C4 / C5- most often from an FCC unit or a steam cracking unit.
- FCC refers to the process of fluidized catalytic cracking of petroleum fractions having a boiling point greater than about 350 ° C, for example a vacuum distillate, optionally deasphalted oil or an atmospheric residue.
- the feedstock of the process according to the invention may also comprise C4 / C5 or larger fractions from a chamber or fluidized bed coking unit, a visbreaking unit or a Fischer-Synthesis unit. Tropsch.
- the feed may also include fractions of a steam cracking gasoline.
- the feedstock of the process according to the present invention is therefore an olefinic C4 / C5 cut, that is to say typically a light olefinic feed, containing predominantly (that is to say for more than 50%) of preferably at least 60%) of the C4 and / or C5 olefins, whose end point of distillation is generally less than 320 ° C., most often less than 250 ° C.
- the olefinic feedstock of the present invention also comprises highly unsaturated compounds, such as dienes (diolefins), especially with 4 or 5 carbon atoms (in particular butadiene) and small amounts of acetylenic compounds having 2 to 10 carbon atoms.
- French patent FR-B-2 608 595 describes the metathesis process which converts into propylene an ethylene + n-butene mixture.
- the method according to the invention does not use metathesis, which avoids the use of other olefins than those of C4 and C5 (such as ethylene) in large quantities, such olefins can obviously be found as impurities. It does not require massive consumption of ethylene, a product of high cost.
- the process according to the invention makes it possible not only not to use ethylene as a filler, but also to co-produce ethylene with propylene. Since the co-production of ethylene is typically lower than that of propylene, this increases the propylene to ethylene ratio of the steam cracker, which is in line with market trends.
- the process described in the international application WO-A-01/04237 is another process for the production of propylene in one step from light olefins which can be considered as a variant of the FCC process using a catalyst comprising a zeolite ZSM- 5.
- a disadvantage of this process is that fluidized bed technology is expensive from an investment point of view and requires a relatively tricky process operation. In addition, it leads to significant losses of catalyst attrition.
- the process according to the invention has turned to another type of process and does not use the FCC.
- the catalyst used comprises an MFI-type zeolite whose Si / Al ratio (Silicon / Aluminum atomic ratio) is greater than or equal to 180, preferably a ZSM-5 zeolite with an Si / Al ratio of between 300 and 1000.
- US-A-6,049,017 which can be considered as the closest prior art, describes a process for producing ethylene and propylene from an olefinic cut comprising the following succession of steps: a) a separation of ethylene, propylene and diolefins (for example by selective hydrogenation); b) a separation of the n-olefins and iso-olefins by conversion of the iso-olefins using an oxidizing agent and an acid catalyst to form oxygenated compounds (for example by etherification); (c) a separation of oxygenates and d) a cracking of n-olefins using a small pore catalyst (for example zeolitic or preferably non-zeolitic containing SAPO) to obtain ethylene and propylene.
- a small pore catalyst for example zeolitic or preferably non-zeolitic containing SAPO
- the present invention also uses a unit for separating n-olefins and iso-olefins, but on a unit which does not use any oxidizing agent.
- the disadvantage of such an agent methanol, ethanol is that it requires a separation unit (distillation, washing with water, etc.) and poses problems of pollution or even toxicity with regard to methanol. .
- the process according to the present invention leads to the formation of propylene, but also additional quantity of gasoline of excellent quality.
- the present invention relates to a process for converting an olefinic C4 / C5 cut to propylene and gasoline, comprising the following sequence of steps:
- step (2) selective oligomerization of iso-olefins of at least a portion of the effluent from step (1), followed by distillation, so as to obtain a gasoline fraction and at least one remaining cut containing less than 10 % weight of isobutenes, and
- step 3 oligocracking the n-olefins, operating in one step, on at least part of the remaining cut of step (2), on a catalyst comprising at least one zeolite having a shape selectivity and an Si / Al atomic ratio from 50 to 500, followed by separation to obtain a gasoline fraction, propylene and a residual C4 / C5 cut.
- the C4 and C5 olefinic feedstock is generally derived from a steam cracking or catalytic cracking unit (FCC).
- FCC catalytic cracking unit
- the aromatic-rich gasoline fraction resulting from the oligocracking step may advantageously be at least partially mixed with the gasoline cut from selective oligomerization to form a gasoline having an RON octane number of at least 94.
- the process according to the invention ultimately makes it possible to obtain a propylene yield of at least 19%, preferably greater than 22%.
- the invention also relates to an installation which comprises: a selective hydrogenation unit containing at least one catalyst comprising at least one metal selected from the group formed by Ni, Pd and Pt, deposited on a non-acid refractory oxide support, the unit being provided with conduits for the entry of the C4 / C5 olefinic cut to be treated and hydrogen and for the outlet of the effluent; a selective oligomerization unit of the iso-olefins, comprising successively a drying unit, a desulfurization unit and a reaction unit containing at least one selective oligomerization acid catalyst, the unit being provided with conduits for the passage of effluents between said successive units, for the entry of at least a portion of the effluent from the hydrogenation unit and for the outlet of the effluent;
- a distillation column separating a gasoline fraction and at least one remaining cut
- the hydrogenation unit comprises a fixed-bed reactor with a downward flow of the feedstock, a pipe bringing the effluent obtained into a second fixed-bed reactor at the upward co-current of said effluent and hydrogen.
- the plant further comprises an aromatics extraction unit provided with a pipe for the entry of the oligocracking effluent and an outlet pipe for the deflavored gasoline.
- FIG 1 shows the diagram of the method and the installation according to the invention which will allow an easier understanding of the detailed description which follows.
- the feed to be treated (1) is introduced into a selective hydrogenation unit (a) and produces an effluent (2).
- a charge of another origin (2 1 ) may be added to this effluent (2) provided that the unsaturated content of said feedstock (2 1 ) is between 10 ppm and 1000 ppm, preferably between 50 ppm and 300 ppm. .
- (2 ') may be an FCC gasoline that does not need to be hydrotreated.
- a lighter hydrocarbon cut (4) mostly consisting of C4 and C5 fractions and
- an oligomer (3) mainly consisting of C8 olefins and may contain a certain proportion of compounds up to C16.
- the C4 / C5 cut corresponding to the flow (4) is sent in admixture with the recycle stream (5), after purging, to the oligocracking unit (c).
- the oligocracking unit (c) produces, after separation in a distillation column (d 1 ):
- a light cut (7) rich in ethylene an effluent (6) rich in propylene
- the recycle (8) from the distillation column (d ') constitutes a stream (5 1 ) which is sent to the inlet of the selective oligomerization unit (b) .
- a variant in which part of the fraction (8) would be recycled by the flow (5) at the inlet of the oligocracking unit and another part would be recycled by the flow (5 1 ) to the The entry of the oligomerization unit remains perfectly within the scope of the invention.
- the crude feedstock from a steam cracker or FCC generally contains diene compounds (diolefins), which are poisons with respect to the catalysts used in the oligomerization and oligocracking units.
- the filler is treated by selective hydrogenation to reduce the impurity content.
- this step of selective hydrogenation of the dienes and acetylenic mono-olefins is mandatory.
- This selective hydrogenation can either treat the raw steam cracker cut or the C4 cut after it has been previously treated in a unit for extracting diolefin type compounds by absorption in a solvent.
- This type of butadiene extraction process is known to those skilled in the art.
- the selective hydrogenation step is optional, but it facilitates the implementation of the downstream process.
- step (1) a C4 / C5 olefinic steam-cracking cut is processed and in step (2) at least part of the effluent from step (1) and a C4 / C5 olefinic catalytic cracking cut.
- the main purpose of this first step of selective hydrogenation is to convert the diolefins (or dienes) to mono-olefins. Indeed, only the mono-olefins can be converted into propylene according to the process of the invention. It is therefore important to maximize the mono-olefin content in the feed to be treated.
- Another objective of this first step is to purify the charge of the other impurities present, in particular the acetylenic compounds, which are poisons with respect to the catalysts used in the downstream stages.
- the transformation is carried out using two reactors in series, with optional recycling of a fraction of the effluent at the inlet of the selective hydrogenation unit. This recycling also helps to control global warming of the reaction.
- the unsaturated content of the effluent at the end of the selective hydrogenation stage is at most 1000 ppm, preferably at most 300 ppm, often between 10 ppm and 1000 ppm. preferably between 50 ppm and 300 ppm.
- the catalysts used in this selective hydrogenation step generally consist of a Group VIII metal (typically Ni Pd) deposited on a non-acid alumina or refractory oxide support. Indeed, the external acid surface should not be too important to limit the polymerization reactions on the surface of the catalyst.
- the preferred support is alumina.
- the metal content preferentially palladium, must be between 0.1% and 5% by weight and preferably between 0.2% and 0.6% by weight.
- nickel When nickel is used as the metal, its content is between 5% and 25% by weight, preferably between 7% and 20% by weight.
- the operating conditions are chosen so that the effluent remains in the liquid state, ie typically from 20 ° C. to 150 ° C., at pressures ranging from 5 bars to 40 bars.
- the amount of catalyst used for the reaction is typically between about 2 m ⁇ and about 8 m ⁇ of catalyst per m3 of fresh feed being treated.
- Hydrogen is generally introduced at a level of from 5% to 30% by mole above stoichiometry and preferably from 10% to 20% above the stoichiometric amount.
- the reaction is conducted in a generally downflow fixed bed reactor for the main reaction, (this is the case when there is more than 1.5% by weight of diolefins present in the effluent to be converted) and with a preferably a catalyst consisting of Pd deposited on alumina, generally in ascending cocurrent with hydrogen for the finishing phase of the reaction, preferably with a catalyst consisting of Pd / Ag deposited on alumina.
- This arrangement has the advantage of increasing the conversion.
- the second step of the process according to the invention consists in a selective oligomerization of the iso-olefins (isobutene, isopentene) of all the effluent from the first step, taking place in two phases.
- the selective oligomerization of isobutene is described in detail in patent FR-B-2 492 365.
- the first phase of the selective oligomerization consists of drying and desulphurizing the feedstock.
- Both drying and desulfurization functions are performed within the same reactor and use sieves. These sieves generally consist of a series of zeolites having different pore size (zeolites 3A, 4A, 5A, 13X) or optionally activated alumina. The sieves used to carry out the drying and the desulfurization are generally carried out according to an alternating reaction-regeneration cycle.
- the drying and desulfurization phase is generally carried out in the liquid phase, at a temperature close to ambient (20 ° C. to 70 ° C.), at low pressures of between 1 bar and 15 bars.
- the regeneration phase consists in sending to the reactor a dry and hot gas, for example nitrogen, at a temperature of between 20 ° C. and 400 ° C.
- a dry and hot gas for example nitrogen
- the second phase of the oligomerization step consists of a selective oligomerization of iso-olefins (isobutenes, isopentenes).
- the selectivity of the operation consists precisely in oligomerizing the isobuthes without oligomerizing the n-olefins (n-butenes, n-pentenes).
- the catalyst used in this step is an acid catalyst, for example a silica-alumina type catalyst, a resin or a solid phosphoric acid type catalyst.
- the catalyst used in this step is a silica alumina type catalyst as described in patent FR-B-2 463 802, the silica content of which is between 60 and 95% by weight, preferably between 70 and 90%. % by weight, and having as an additive between 0.1 and 5% by weight of zinc oxide.
- the 100% complement is usually alumina.
- the operating conditions are generally (and in particular in the case of the catalyst above):
- the selective oligomerization step is generally carried out in a series of N fixed bed reactors, each of which is followed by a cooler.
- the number N is chosen according to the targeted n-butene selectivity. It is typically from 2 to 4. External recycling at the inlet of these N reactors is optionally used to maintain a constant isobutene level at the inlet of the process. This recycling consists either of the effluent taken directly at the outlet of the reactor, or of the oligomerate recovered at the bottom of the distillation column.
- the temperature of each of the chillers N is adjusted during the operation to compensate for the loss of activity of the catalyst system used.
- a separation by distillation is carried out in order to separate a gasoline fraction essentially comprising hydrocarbons ranging from C6 to C16, often predominantly composed of C8 hydrocarbons, and thus comprising C6-C16 or C8 oligomers.
- -C16 for example, and recovering one or more C4 and C5 cuts remaining essentially comprising paraffins and n-olefins and C5 iso-olefins.
- This remaining C4 / C5 cut typically contains from 20% to 80% by weight of olefins, predominantly light olefins of 4 and / or 5 carbon atoms.
- the remainder of the cut consists of isoolefins, essentially C5 isoolefins, and paraffins.
- the content of iso-olefins C4 is generally less than 10% by weight.
- At least one C4 / C5 cut produced at the end of the selective oligomerization step (and preferably all the remaining cut) is sent to a catalytic oligocracker unit operating in one step.
- the catalyst used in the one-step oligocracking unit comprises at least one zeolite having a shape selectivity, this zeolite having an Si / Al atomic ratio of between 50 and 500, preferably between 60 and 160, and even better between 75 and 150.
- the zeolite having a shape selectivity may belong to a first group consisting of one of the following structural types: MEL, MFI, NES, EUO, FER, CHA, MFS and MWW.
- MFI such as ZSM-5
- MEL t ⁇ 1 q ⁇ i ⁇ ZSM-11
- the shape-selective zeolite may also belong to a second group consisting of the following zeolites: NU-85, NU-86, NU-88 and IM-5.
- ZSM-5 commercial zeolites can be used:
- CBV 28014 Si / Al ratio: 140
- CBV 1502 Si / Al: 75 atomic ratio
- the zeolite or zeolites may be dispersed in a matrix based on silica, zirconia, alumina or silica-alumina, the proportion of zeolite often being between 15% and 90% by weight, preferably between 30% and 80%. weight.
- Si / Al atomic ratios included in the preferred range within the scope of the invention can be obtained at the time of manufacture of the zeolite or by subsequent dealumination.
- the preferred catalysts are those consisting of zeolite and matrix.
- the catalyst is generally used in a moving bed, preferably in the form of balls of diameter generally between 1 mm and 3 mm.
- the catalyst can also be used in the fixed bed state, in which case the reactor or reactors used work alternately in reaction, then in regeneration according to the well known technique called "swing".
- the regeneration phase typically comprises a combustion phase of the carbonaceous deposits formed on the catalyst, for example using an air / nitrogen mixture, oxygen depleted air (for example by flue gas recirculation) or simply by air.
- the regeneration may optionally comprise other phases of catalyst treatment and regeneration which will not be developed here not being a characteristic aspect of the invention.
- the catalytic oligocracking unit is usually carried out in one step at a temperature of about 450 ° C. to about 580 ° C., with a space velocity generally ranging from 0.5 to 6 h -1 .
- the operating pressure is generally between 0.1 MPa and 0.5 MPa.
- the regeneration conditions of the oligocracking catalyst generally use a temperature of between 400 ° C. and 650 ° C., the pressure being most often close to the oligocracking pressure.
- the effluent produced by the oligocracking is distilled to separate the propylene and the gasoline fraction; a residual C4 / C5 fraction is also obtained. Propylene is therefore separated directly by distillation from the effluent.
- a distillation column called superfractionation column, may be added to treat the distilled propylene.
- the yield per propylene pass relative to the amount of olefins contained in the fresh batch of the process is greater than 19%, preferably greater than 22% by weight.
- the residual C4-C5 fraction may advantageously be recycled at least partly to the inlet of the oligocracking unit, and / or to the inlet of the selective oligomerization unit. Preferably, it is recycled at least in the oligocracking step.
- the rate of recycling of said C4 / C5 cut based on the feed rate entering the selective oligomerization unit may advantageously vary in a ratio of 1 to 5 and preferably of 3 to 5.
- the distribution of the recycle flow of the C4 / C5 cut from the oligocracking unit to, on the one hand, the oligocracking unit and, on the other hand, the selective oligomerization unit, is made according to the wishes of the operator.
- the entire recycle flow rate may be sent to the input of the selective oligomerization unit, and in other cases, the entire recycle flow rate may be sent to the recycling unit. entry of the oligocracking unit.
- the gasoline fraction produced by the one-step oligocracking unit is an aromatic gasoline which can be mixed in whole or in part with the olefin gasoline fraction produced by the selective oligomerization unit (rich in multi-branched olefins), advantageously to form a gasoline of octane number at least equal to 94 of RON, or to be sent partly or wholly to an aromatics extraction complex to preferably be subsequently mixed with the gasoline pool.
- the charge (1) is a C4 crude steam cracking cut.
- the charge (2 1 ) is a crude C4 cut of FCC.
- the selective hydrogenation unit uses two reactors:
- the first reactor uses a Pd / Al 2 O 3 catalyst at 0.3 wt% Pd, on an alumina of 69 m 2 / g surface area. It operates at 50 ° C. in an adiabatic manner in a descending through bed at 30 bars absolute. In order for the reaction to remain in the liquid phase, a recycling equal to 20 times the mass flow rate of charge is used.
- the overall H2 / butadiene ratio is 1.05 mol / mol.
- the second reactor called “finishing reactor” is an upflow reactor, using a Pd + Ag catalyst deposited on alumina, it is 0.2% by weight of Pd, and 0.1% of Ag deposited on an alumina of 69 m ⁇ / g of BET surface.
- the temperature is set at 35 ° C, the pressure at 26 bar.
- the raw load of the FCC and the charge from the selective hydrogenation are mixed.
- the resulting mixture is dried and desulfurized on 3A and 13X molecular sieves, sold by Axens.
- the mixture thus treated is sent to the selective oligomerization unit of isobutenes.
- This unit operates at an overall VVH of 1, on a catalyst consisting of 90% silica and 10% alumina at a temperature of between 30 ° C. and 50 ° C. pressure of 20 bar.
- a distillation column (d) separates a C4 / C5 rich cut from a gasoline cut rich in C8 - C16 oligomers.
- a fraction of the C4 / C5 cut (recycling rate of 1 ton / ton treated, ie 50% by weight) is used as thermal diluent.
- the oligocracking is carried out in a reactor operating at 2.8 bar absolute, at 510 ° C., with a PPH of 3.5 h -1 relative to the feedstock entering the reactor.
- a single adiabatic downflow gas phase reactor is used.
- the cycle time between two successive regenerations is 48 h.
- the catalyst used is composed of 30% ZSM-5 zeolite with a Si / Al atomic ratio of 140 and 70% gamma alumina. It is prepared in the form of beads 3 mm in diameter shaped by the technique of "oil drop" and it flows in a moving bed.
- the C4 cut from the oligocracking unit is recycled in the oligocracking process, according to the material balance of Table 1.
- the gasoline cut from the oligomerization unit has an RON of 96.5 and a MON of 84.
- the petrol cut from the oligocracker unit has a RON of 96.5 and a MY of 88.5.
- the mixture of these two species leads to an essence of RON equal to 96.5 and a MON of 85.
- the yield of the C3 cut is 19%. This C3 cut contains 95% propylene.
- the overall efficiency of the petrol cut is 43%.
- the charge (1) is a C4 crude steam cracking cut.
- the load (2 1 ) is a crude C4 cut of FCC.
- the RON of the oligomer is always 96.5.
- the overall C3 cut yield is 22%.
- the overall efficiency of the petrol cut is 38%.
- Example 3 The data of Example 3 are the same as those of Example 1 except for the following:
- the charge (1) is a crude C4 cut of steam cracking.
- the load (2 1 ) is a crude C4 cut of FCC.
- Recycling (5 ') is returned to the selective oligomerization unit.
- the overall C3 cut yield is 22%.
- the degree of conversion of C4 olefins in C3 section is 47%.
- Example 4 The data of Example 4 are the same as those of Example 1 except for the following:
- the charge (1) is a C4 crude steam cracking cut.
- the feedstock (2 1 ) is a mixture of a crude C4 cut of FCC, a crude C5 cut of FCC and a C5 cut of steam cracking which has been further treated to remove dienes similar to that described for cutting C4.
- the cycle time of the oligocracking unit is 48 h. This recycling (5) now concerns a fraction of the C4 and C5 cuts as defined in the material balance of Table 4.
- the cycle time of the oligocracking unit is 48 h.
- the overall C3 cut yield is 28%.
- the degree of conversion of olefins C4-C5 in C3 section is 42%.
- the RON of the oligomerate increases to 94.5 and the MON to 82.
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- General Chemical & Material Sciences (AREA)
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/722,300 US9193922B2 (en) | 2004-12-21 | 2005-12-13 | Process of direct conversion of a charge comprising olefins with four and/or five carbon atoms, for the production of propylene with co-production of gasoline |
GB0713207A GB2437203B (en) | 2004-12-21 | 2005-12-13 | Method for direct conversion of a feedstock comprising C4/C5 olefins for producing propylene with co-production of gasoline |
JP2007547561A JP5140819B2 (ja) | 2004-12-21 | 2005-12-13 | ガソリンの共製造を伴ってプロピレンを製造するための、4個および/または5個の炭素原子を有するオレフィンを含む装入原料の直接転化方法 |
DE112005003177.2T DE112005003177B4 (de) | 2004-12-21 | 2005-12-13 | Verfahren zur direkten Umwandlung einer Beschickung, die Olefine mit vier und/oder fünf Kohlenstoffatomen umfasst, zur Produktion von Propylen mit einer Koproduktion von Benzin |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0413680A FR2879620B1 (fr) | 2004-12-21 | 2004-12-21 | Procede de conversion directe d'une charge comprenant des olefines a quatre et/ou cinq atomes de carbone, pour la production de propylene avec une co-production d'essence |
FR0413680 | 2004-12-21 |
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WO2006067305A1 true WO2006067305A1 (fr) | 2006-06-29 |
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PCT/FR2005/003141 WO2006067305A1 (fr) | 2004-12-21 | 2005-12-13 | Procede de conversion directe d’une charge comprenant des olefines a quatre et/ou cinq atomes de carbone, pour la production de propylene avec une co-production d’essence |
Country Status (7)
Country | Link |
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US (1) | US9193922B2 (fr) |
JP (1) | JP5140819B2 (fr) |
CN (2) | CN103333714A (fr) |
DE (1) | DE112005003177B4 (fr) |
FR (1) | FR2879620B1 (fr) |
GB (1) | GB2437203B (fr) |
WO (1) | WO2006067305A1 (fr) |
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- 2004-12-21 FR FR0413680A patent/FR2879620B1/fr active Active
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- 2005-12-13 DE DE112005003177.2T patent/DE112005003177B4/de active Active
- 2005-12-13 GB GB0713207A patent/GB2437203B/en active Active
- 2005-12-13 CN CN2013102381291A patent/CN103333714A/zh active Pending
- 2005-12-13 CN CNA2005800437597A patent/CN101084291A/zh active Pending
- 2005-12-13 US US11/722,300 patent/US9193922B2/en active Active
- 2005-12-13 JP JP2007547561A patent/JP5140819B2/ja active Active
- 2005-12-13 WO PCT/FR2005/003141 patent/WO2006067305A1/fr active Application Filing
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008081437A (ja) * | 2006-09-27 | 2008-04-10 | Mitsubishi Chemicals Corp | プロピレンの製造方法 |
EP2404980A1 (fr) | 2010-07-08 | 2012-01-11 | Total Raffinage Marketing | Augmentation de la masse moléculaire moyenne de produits de départ d'hydrocarbure |
WO2012004328A1 (fr) | 2010-07-08 | 2012-01-12 | Total Raffinage Marketing | Augmentation du poids moléculaire moyen d'une charge d'hydrocarbures |
WO2012089716A1 (fr) | 2010-12-28 | 2012-07-05 | Total Raffinage Marketing | Charge d'hydrocarbures contenant des nitriles, son procédé de fabrication et son utilisation |
WO2013104614A1 (fr) | 2012-01-09 | 2013-07-18 | Total Raffinage Marketing | Procédé pour la conversion d'une charge de départ d'hydrocarbures contenant des oléfines de faible point d'ébullition |
EP2636661A1 (fr) * | 2012-02-15 | 2013-09-11 | IFP Energies nouvelles | Procédé de conversion d'une charge lourde, mettant en oeuvre une unité de craquage catalytique et une étape d'hydrogénation sélective de l'essence issue du craquage catalytique |
Also Published As
Publication number | Publication date |
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GB2437203A (en) | 2007-10-17 |
FR2879620A1 (fr) | 2006-06-23 |
CN101084291A (zh) | 2007-12-05 |
DE112005003177T5 (de) | 2008-01-24 |
US9193922B2 (en) | 2015-11-24 |
GB2437203B (en) | 2009-07-08 |
DE112005003177B4 (de) | 2016-03-10 |
JP2008524421A (ja) | 2008-07-10 |
FR2879620B1 (fr) | 2007-02-23 |
GB0713207D0 (en) | 2007-08-15 |
CN103333714A (zh) | 2013-10-02 |
JP5140819B2 (ja) | 2013-02-13 |
US20100036182A1 (en) | 2010-02-11 |
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