WO2023218140A1 - Procede ameliore de deshydrogenation d'hydrocarbures - Google Patents
Procede ameliore de deshydrogenation d'hydrocarbures Download PDFInfo
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- WO2023218140A1 WO2023218140A1 PCT/FR2023/000083 FR2023000083W WO2023218140A1 WO 2023218140 A1 WO2023218140 A1 WO 2023218140A1 FR 2023000083 W FR2023000083 W FR 2023000083W WO 2023218140 A1 WO2023218140 A1 WO 2023218140A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
- C07C5/327—Formation of non-aromatic carbon-to-carbon double bonds only
- C07C5/333—Catalytic processes
- C07C5/3335—Catalytic processes with metals
- C07C5/3337—Catalytic processes with metals of the platinum group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/60—Platinum group metals with zinc, cadmium or mercury
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/62—Platinum group metals with gallium, indium, thallium, germanium, tin or lead
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/62—Platinum group metals with gallium, indium, thallium, germanium, tin or lead
- B01J23/622—Platinum group metals with gallium, indium, thallium, germanium, tin or lead with germanium, tin or lead
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/12—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0209—Impregnation involving a reaction between the support and a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/20—Sulfiding
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C11/00—Aliphatic unsaturated hydrocarbons
- C07C11/02—Alkenes
- C07C11/06—Propene
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
- C07C2521/02—Boron or aluminium; Oxides or hydroxides thereof
- C07C2521/04—Alumina
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
- C07C2523/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
- C07C2523/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals of the platinum group metals
- C07C2523/42—Platinum
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
- C07C2523/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
- C07C2523/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals combined with metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36
- C07C2523/56—Platinum group metals
- C07C2523/60—Platinum group metals with zinc, cadmium or mercury
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
- C07C2523/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
- C07C2523/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals combined with metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36
- C07C2523/56—Platinum group metals
- C07C2523/62—Platinum group metals with gallium, indium, thallium, germanium, tin or lead
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2531/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- C07C2531/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- C07C2531/12—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
Definitions
- the present invention relates to an improved process for dehydrogenation of hydrocarbon chains (or hydrocarbons).
- the present invention also relates to a composition allowing in particular the implementation of such a process.
- alkenes or olefins dehydrogenated hydrocarbon chains
- Propylene is mainly polymerized into polypropylene (PP), a consumer polymer. It is for example used for the manufacture of molded parts in the automotive sector, food packaging, furnishing fabrics, disposable professional clothing or even as an adjuvant for concrete.
- Isobutene can be used to produce methyl tert-butyl ether or be polymerized into polyisobutene (PIB).
- PIB polyisobutene
- This polymer is used for the manufacture of inner tubes or inner linings of tubeless (tubeless) tires. Its secondary applications are very varied: manufacturing of chewing gum, sealing and vibration damping mastics, adhesives, coatings, cosmetic products, insulating oils, and others.
- the present invention aims to provide an improved process for dehydrogenation of hydrocarbon chains, preferably with improved yield.
- the present invention also aims to provide an improved dehydrogenation process that is easy to implement, and in particular which does not involve any modification of pre-existing industrial installations.
- the present invention aims to provide a composition that is easy to use by process operators, making it possible to improve the dehydrogenation reaction while being compatible with industrial installations.
- the invention responds in whole or in part to the above objectives.
- the present inventors have discovered that the introduction upstream or at the inlet of the dehydrogenation reactor of at least one metal M as defined below, improves the yield of the reaction and/or increases the life of the catalyst. .
- the introduction of the metal M according to the invention makes it possible to obtain an increase in yield of between 1% and 10%, preferably between 2% and 5%.
- the addition of metal M can allow a controlled improvement in yield, in particular thanks to a specific and adapted formulation of said metal M.
- metal M makes it possible to generate more active catalytic sites on the dehydrogenation catalyst. Furthermore, when the catalyst comprises several metals, the organization of the metallic catalytic sites may prove difficult to control. Also, the addition of metal M according to the invention makes it possible to improve and/or control the activity of the catalyst. The invention may also enable the use and handling of less complex and less toxic catalysts, which may be easier to regenerate. Adding a metal M separate from the catalyst, and possibly continuously, also makes it possible to combat its progressive deactivation, a problem well known to manufacturers in this type of process.
- organometallic compounds according to the invention can be solubilized in all or part of the reagent (that is to say in the hydrocarbon chain to be dehydrogenated) and/or be solubilized in other additives introduced into the process.
- these organometallic compounds can be solubilized in compositions limiting or preventing the formation of coke (in particular on the catalyst), while maintaining the gain in yield.
- Such compositions generally include sulfur compounds which will make it possible to passivate the metallurgy of the reactor and/or to selectively poison the catalyst to limit or prevent the formation of coke.
- the organometallic compounds such as according to the invention can be solubilized in compositions comprising sulfur compounds as defined below.
- a sulfur compound additive to an organometallic compound.
- DMDS dimethyl disulfide
- compositions have the advantage of being able to be introduced into the process at the point(s) of introduction of additive(s) already in place in the dehydrogenation unit and allow controlled dosing of the quantity of metal M introduced.
- no modification of the installations is necessary to improve the dehydrogenation process, which presents a great advantage for manufacturers.
- the present invention relates to a process for preparing an olefin, which can also be called a dehydrogenation process.
- Said process comprises a step of dehydrogenation of a hydrocarbon chain (called step b) below), in at least one reactor in the presence of a catalyst; said process comprising a step of introducing (called step a) below) of a metal M upstream or at the inlet of the reactor(s), and said metal M being chosen from the group consisting of zinc ( Zn), tin (Sn), indium (In), zirconium (Zr), cerium (Ce), germanium (Ge), gallium (Ga), lead (Pb) and thallium (Tl), preferably zinc.
- the present invention also relates to a composition
- a composition comprising:
- R is chosen from a linear or branched alkyl radical, containing from 1 to 4 carbon atoms and a linear or branched alkenyl radical, containing from 2 to 4 carbon atoms,
- - n is an integer equal to 0, 1 or 2
- - x is an integer chosen from 0, 1, 2, 3 or 4
- ⁇ a metal M chosen from the group consisting of zinc (Zn), tin (Sn), indium (In), zirconium (Zr), cerium (Ce), germanium (Ge), gallium (Ga), lead (Pb) and thallium (Tl), preferably zinc.
- the present invention also relates to the use of said metal M in a process for dehydrogenation of a hydrocarbon chain, preferably to increase the yield.
- the present invention also relates to the use of said composition, in a process for dehydrogenation of a hydrocarbon chain, preferably to increase the yield.
- said metal M is in the form of an organometallic compound of general formula (II) as defined below.
- the dehydrogenation reaction of hydrocarbon chains is a widely known reaction (see WO 2020/081421 and EP 3 240 770 for example).
- alkanes are used to obtain mono-olefins.
- hydrocarbon chain is meant in particular an alkane or an olefin. It can have between 2 and 30 carbon atoms, preferably between 2 and 10 carbon atoms.
- alkane is meant in particular a saturated, linear, branched or cyclic hydrocarbon chain, preferably linear.
- olefin is meant in particular an unsaturated hydrocarbon chain, which may be a mono- or a di-olefin, linear, branched or cyclic, preferably linear.
- the alkanes to be dehydrogenated can contain between 2 and 30 carbon atoms, for example between 2 and 10 carbon atoms, preferably between 3 and 6 carbon atoms.
- Propane, butane, isobutane and their mixtures are preferred, and most preferably propane, isobutane and their mixtures.
- the mono-olefins to be dehydrogenated can contain between 3 and 30 carbon atoms, for example between 3 and 10 carbon atoms, preferably between 3 and 6 carbon atoms. We can cite but-1 -ene.
- Said hydrocarbon chains can be in liquid, gaseous form or in a gas-liquid mixture. They can be introduced mixed with a diluent into the dehydrogenation reactor. Said mixing with the diluent can be carried out upstream, at the inlet or in the reactor. Mention may in particular be made as diluent: hydrogen, water vapor, methane, ethane, carbon dioxide, nitrogen, argon, or any other inert gas for the dehydrogenation reaction and their mixtures. Hydrogen and water vapor are preferably used. A molar ratio (diluent/hydrocarbon chain) of between 0.1:1 and 40:1 is generally used, preferably between 0.4:1 and 10:1.
- the dehydrogenation reaction can be carried out at a temperature between 400°C and 900°C, preferably between 520°C and 650°C.
- the dehydrogenation reaction can be carried out at a pressure of between 0.01 and 10 bars, preferably between 1 and 6, more preferably between 1 and 3 bars.
- the catalyst used is a dehydrogenation catalyst, preferably heterogeneous. It includes in particular a supported metal.
- the catalyst comprises at least one metal chosen from groups 6, 8, 9 and 10 of the periodic table of elements (formerly groups VI A and VIII).
- the catalyst comprises a metal chosen from chromium, platinum or palladium; more preferably platinum.
- the chromium, platinum or palladium present may be the majority metal in the catalyst (by weight, relative to all the metals contained in the catalyst).
- the catalyst may also comprise other metals such as rhenium, germanium or tin, for example one, two or three metals.
- the catalyst may also comprise a promoter, preferably a metal chosen from alkali or alkaline earth metals, and preferably potassium.
- said catalyst before step a) of introducing the metal M comprises less than 5% by weight of said metal M, preferably less than 1% by weight, relative to the total weight of the catalyst.
- the catalyst before step a) of introducing the metal M does not include zinc.
- the metal(s) of the above catalyst may be present as element(s) or as compound(s), for example in an oxidized or reduced form.
- Such catalysts are known to those skilled in the art and are for example described in document US 3,723,557.
- the catalyst support can be of any type known to those skilled in the art and preferably chosen from porous supports.
- it can be chosen from silica, alumina, silica-alumina, molecular sieves, titanium dioxide and zirconia, preferably alumina.
- a particularly preferred catalyst is a catalyst comprising platinum supported on alumina, preferably a catalyst consisting essentially of platinum supported on alumina.
- Such catalysts can undergo activation, for example reduction and/or sulfurization, in situ or ex situ, prior to their use in the dehydrogenation reaction. This operation is known to those skilled in the art and can be carried out using conventional techniques.
- the reaction can be carried out in one or more reactors. Said reactors can be placed in parallel or in series.
- the reactors can be fixed, mobile or fluidized catalytic beds. Reactors with mobile catalytic beds in series are preferably used.
- heating means between each reactor can be put in place, so as to ensure that the entry temperature of the reagents into the reactors is the desired reaction temperature.
- the introduction of the metal M can be done before or after the heating means, preferably before.
- the process according to the invention may comprise other stages until the recovery of the olefin and the hydrogen (H 2 ) produced.
- they make it possible to obtain a stream enriched in olefin (streams A and D below), which can be subsequently purified if necessary.
- the outgoing flow S from the reactor may include hydrogen, olefin and possibly unreacted hydrocarbon chain.
- the heterogeneous catalyst can also be recovered at the reactor outlet separately from the outgoing flow S.
- flow A preferably liquid, comprising the olefin and possibly the unreacted hydrocarbon chain.
- the H and/or E streams can be recycled in whole or in part to the reaction step. In the presence of several reactors, they can be reintroduced into one, several or all of the reactors.
- the liquid flow D is recovered then possibly purified if necessary.
- the dehydrogenation process may also include a catalyst regeneration step (called step e)). Indeed, the catalyst can gradually deactivate, in particular due to the formation of coke on it. A regeneration step may therefore be necessary in order to restore all or part of its activity. This regeneration can be carried out using conventional techniques.
- Oxy-chlorination is generally carried out by bringing the catalyst into contact with a gas comprising a halogen, preferably chlorine, at high temperatures, for example between 500°C and 550°C.
- the catalyst can be reduced by contacting it with hydrogen, so as to reduce the metals oxidized during the regeneration.
- the regenerated and possibly reduced catalyst can be recycled to the reaction step, alone or mixed with fresh catalyst.
- the process according to the invention comprises at least the following steps: a) introduction of said metal M upstream or at the inlet of the reactor(s); b) dehydrogenation reaction of the hydrocarbon chain, in the reactor(s) with moving catalytic beds, so as to obtain an outgoing stream S comprising an olefin and hydrogen; c) recovery and separation of the outgoing flow S from step b) so as to obtain:
- stream A preferably liquid, comprising the olefin
- the process according to the invention comprises at least the following steps: a) introduction of said metal M upstream or at the inlet of the reactor(s); b) dehydrogenation reaction of an alkane, in the moving catalytic bed reactor(s), so as to obtain an outgoing stream S comprising an olefin, the unreacted alkane and hydrogen; c) recovery and separation of the outgoing flow S from step b) so as to obtain:
- stream A preferably liquid, comprising the olefin and the unreacted alkane
- the H and/or E stream can be recycled in whole or in part to the reaction step. In the presence of several reactors, it can be reintroduced into one, several or all of the reactors.
- the process according to the invention can be carried out in batch or continuously, preferably continuously.
- dehydrogenation processes are thus known and we can cite those mentioned in the publication “Propylene Production by Propane Dehydrogenation (PDH)
- the metal M according to the invention is chosen from the group consisting of zinc (Zn), tin (Sn), indium (In), zirconium (Zr), cerium (Ce), germanium ( Ge), gallium (Ga), lead (Pb) and thallium (Tl).
- the metal M is chosen from the group consisting of zinc (Zn), tin (Sn), lead (Pb) and indium (In).
- the metal M is zinc (Zn).
- Said metal M is more particularly in the form of an organometallic compound, preferably of the following general formula (II): (1) in which:
- - M is the metal as defined above;
- - p is an integer between 1 and 6, preferably between 2 and 4;
- the Ri radicals identical or different, independently represent a hydrocarbon radical containing from 1 to 12 carbon atoms.
- the radicals Ri are chosen independently of each other from the group consisting of: a linear, branched or cyclic alkyl containing between 1 and 10 carbon atoms; a linear, branched or cyclic alkenyl containing between 1 and 10 carbon atoms; an aryl containing between 6 and 10 carbon atoms, said aryl optionally being substituted by one or more linear or branched alkyl groups containing 1 to 10 carbon atoms; And an alkylaryl containing between 6 and 12 carbon atoms.
- radicals Ri are chosen independently of each other from the group consisting of: a linear, branched or cyclic alkyl containing between 1 and 10 carbon atoms; and an aryl containing between 6 and 10 carbon atoms, said aryl optionally being substituted by one or more linear or branched alkyl groups containing 1 to 10 carbon atoms.
- the Ri radicals are chosen independently of each other from linear, branched or cyclic alkyls containing between 1 and 10 carbon atoms.
- the Ri radicals are identical.
- said alkyls contain between 1 and 6 carbon atoms, more preferably between 1 and 3 carbon atoms.
- said alkyls are chosen from the group consisting of methyl, ethyl, n-propyl and isopropyl.
- said aryl is phenyl and/or said alkylaryl is benzyl and/or alkenyl is cyclopentadienyl.
- organometallic compound is chosen from those of the following formulas:
- the metal M is zinc and is found in the form of an organometallic compound of the following general formula (Ha):
- organometallic compounds of general formula (II) tetramethyl tin, trimethyl indium, tetrabenzyl zirconium, tetraethyl germanium, trimethyl gallium, tetramethyl lead, cyclopentadienyl thallium, dimethyl zinc (Zn(CH 3 ) 2 ), diethyl zinc (Zn(C2H 5 )2), diisopropyl zinc (Zn(i-C3H 7 ) 2 ), dipropyl zinc (Zn(C3H 7 )2) and diphenyl zinc (Zn(C6H 5 ) 2 ).
- Said organometallic compound is in particular chosen from the group consisting of: Zn(CH 3 ) 2 , Zn(C2H 5 )2, Zn(i-C3H 7 ) 2 , Zn(C3H 7 ) 2 and Zn(CeH 5 )2.
- the CAS numbers of these compounds are as follows: Zn(CH 3 ) 2 : 544-97-8; Zn(C 2 H 5 )2: 577-20-0; Zn(C 3 H 7 ) 2 : 628-91 -1; Zn(iC 3 H 7 ) 2 : 625-81 -0 and Zn(C 6 H 5 )2: 1078-58-6.
- said metal compound is chosen from Zn(CH 3 ) 2 , Zn(C2H 5 )2 and Zn(C3H 7 ) 2 ; more particularly Zn(CH 3 ) 2 and Zn(C2H 5 )2.
- Said organometallic compounds can be formulated in a solvent, in particular an organic solvent, in particular chosen from toluene and alkanes containing between 5 and 10 carbon atoms.
- the solvent is chosen from toluene, heptane, hexane or mixtures thereof.
- Organometallic compounds as mentioned above are commercially available in the form of 1 M or 2 M solutions.
- step a) The introduction of the metal M (step a)), possibly in organometallic form as defined above, can be done by any known means, for example by injection.
- said metal M is introduced separately from said dehydrogenation catalyst.
- the introduction can be one-off, semi-continuous or continuous, preferably continuously. It can be carried out at the start-up of an olefin production unit or during all or part of the olefin production.
- the quantities of metal M introduced may or may not vary during the duration of the addition, for example with a decreasing or increasing gradient during the duration of the addition.
- the introduction of the metal M can be done upstream or at the inlet of the first reactor in the series and/or upstream or at the inlet of any one or of several of the following reactors.
- the introduction of metal M can thus be done in different locations in the process installations.
- Said metal M is preferably included in a composition also comprising a sulfur compound of general formula (I) below:
- - n is an integer equal to 0, 1 or 2
- - x is an integer chosen from 0, 1, 2, 3 or 4, and
- R and R' are chosen from linear or branched alkyls containing 1 to 4 carbon atoms.
- R and R’ are identical.
- n is equal to 0.
- x is chosen from 1, 2, 3 or 4, preferably 1 or 2 and more preferably 1.
- the sulfur compound has the following general formula (la):
- R-S-S-R’ (la), in which the radicals R and R’ are as defined above.
- mixtures of two or more sulfur compounds of general formula (I) can be used according to the present invention.
- mixtures of di- and/or polysulfides can be used, for example mixtures of disulfides, such as disulfide oils (called “DSO” for DiSulfide Oils in English).
- the sulfur compound of general formula (I) is chosen from dimethyl disulfide (DMDS), dimethyl sulfide (DSM), dimethyl sulfoxide (DMSO) and di-tert-butyl polysulfides.
- said sulfur compound of general formula (I) is chosen from dimethyl disulfide (DMDS), dimethyl sulfide (DSM) and di-tert-butyl polysulfides, preferably dimethyl disulfide.
- said sulfur compound is dimethyl disulfide.
- Said sulfur compound is notably available commercially. We can cite DMDS Evolution® E2 marketed by the company ARKEMA.
- compositions comprising: - DMDS are particularly preferred.
- said composition comprises at least 80%, preferably at least 95%, more preferably at least 99% by total weight of sulfur compound(s) relative to the total weight of the composition. It may contain one or more odor masking agents (see, for example, international application WO 2011/012815A1).
- Said composition may also comprise a solvent, in particular an organic solvent, in particular chosen from toluene and alkanes containing between 5 and 10 carbon atoms.
- the solvent is chosen from toluene, heptane, hexane or mixtures thereof.
- said composition comprises between 0.001% and 10%, for example between 0.005% and 1.5% by weight of said solvent, relative to the total weight of the composition.
- the quantity of metal M is preferably between 1 and 10,000 ppm, preferably between 1 and 1,000 ppm, for example between 1 and 500 ppm, more preferably between 5 and 200 ppm, relative to the total weight of the(s) sulfur compound(s) and the metal M. It can be between 5 and 100 ppm, more particularly between 10 and 100 ppm relative to the total weight of the sulfur compound and the metal M.
- the quantity introduced of the composition can be between 5 and 200 ppm, preferably between 10 and 90 ppm, for example 25, 50 or 75 ppm relative to the weight of the hydrocarbon chain to be dehydrogenated. .
- Said metal M, optionally in organometallic form, or said composition can be mixed beforehand with all or part of the hydrocarbon chain to be dehydrogenated before its introduction upstream or at the inlet of the reactor(s).
- compositions comprising a sulfur compound and a metal M as defined above are new and are also part of the present invention as such.
- compositions comprising: - DMDS are particularly preferred.
- compositions are particularly suitable for introduction into the process such as according to the invention. They are in particular liquid (at room temperature, for example between 5°C and 40°C).
- the organometallic compounds are well solubilized in DMDS, which allows great ease of handling and control of the quantity of metal M introduced.
- compositions according to the invention can be prepared by simple mixing of said sulfur compound and the metal M.
- Said metal M can be in organometallic form, optionally dissolved in a solvent as defined above.
- They can also be in the form of a kit comprising the sulfur compound and the metal M to be formed upstream, at the inlet or in situ in the dehydrogenation reactor.
- the present invention also relates to the use of said metal M, optionally in organometallic form, in a process for dehydrogenation of a hydrocarbon chain in olefin, preferably to increase the yield. It is understood that said metal M can be included in a composition as defined above.
- Figure 1 represents the yield of the dehydrogenation reaction obtained as a function of time.
- DMDS alone is represented by the curve containing the squares
- DMDS additive with Zn(CH 3 ) 2 is represented by the continuous curve
- DMDS additive with Zn(C2H 5 )2 is represented by the curve containing the diamonds.
- the dehydrogenation of propane is carried out in a reactor at a temperature of 625 °C, at a pressure of 3 bars and in the presence of a Pt/AlsOs type catalyst (Pt/AlsOs catalyst from Strem Chemicals Inc.) on a fixed bed on a period of 20 hours.
- a Pt/AlsOs type catalyst Pt/AlsOs catalyst from Strem Chemicals Inc.
- the propane flow rate is 2.2 NL/h.
- a continuous injection of 75 ppm of different DMDS compositions is carried out upstream of the reactor.
- compositions according to the invention were prepared by adding to DMDS, 50 ppm of the following commercial solutions (supplier Aldrich):
- the cumulative quantities of propylene obtained at 8 p.m. are as follows: - 6.08 NL with DMDS alone;
- the propylene yield is therefore improved thanks to the present invention.
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020247040658A KR20250008775A (ko) | 2022-05-10 | 2023-05-05 | 탄화수소를 탈수소화하는 개선된 방법 |
| CN202380039435.4A CN119173491A (zh) | 2022-05-10 | 2023-05-05 | 使烃类脱氢的改进的方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2204397 | 2022-05-10 | ||
| FR2204397A FR3135458B1 (fr) | 2022-05-10 | 2022-05-10 | Procede ameliore de deshydrogenation d’hydrocarbures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023218140A1 true WO2023218140A1 (fr) | 2023-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2023/000083 Ceased WO2023218140A1 (fr) | 2022-05-10 | 2023-05-05 | Procede ameliore de deshydrogenation d'hydrocarbures |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20250008775A (fr) |
| CN (1) | CN119173491A (fr) |
| FR (1) | FR3135458B1 (fr) |
| WO (1) | WO2023218140A1 (fr) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3723557A (en) | 1970-02-24 | 1973-03-27 | Universal Oil Prod Co | Dehydrogenation with a catalytic composite containing platinum, rhenium, germanium and an alkali or alkaline earth metal |
| EP0305144A2 (fr) * | 1987-08-24 | 1989-03-01 | Canon Kabushiki Kaisha | Méthode pour former un film semi-conducteur cristallin composé |
| WO1992000261A1 (fr) * | 1990-06-22 | 1992-01-09 | Exxon Chemical Patents Inc. | Procede permettant l'adsorption d'especes de soufre a partir de propylene/propane a l'aide d'un adsorbant pouvant être regenere |
| US5336829A (en) * | 1992-03-26 | 1994-08-09 | Institut Francais Du Petrole | Continuous process for the dehydrogenation of paraffinic to olefinic hydrocarbons |
| WO2011012815A1 (fr) | 2009-07-31 | 2011-02-03 | Arkema France | Composition à base de sulfure organique à odeur masquée |
| WO2015152160A1 (fr) * | 2014-03-31 | 2015-10-08 | 三井化学株式会社 | Procédé de production d'un hydrocarbure insaturé |
| WO2016027219A1 (fr) * | 2014-08-21 | 2016-02-25 | Sabic Global Technologies B.V. | Systèmes et procédés pour la déshydrogénation d'alcanes |
| EP3240770A1 (fr) | 2014-12-31 | 2017-11-08 | SABIC Global Technologies B.V. | Procédé permettant d'améliorer la performance de la déshydrogénation d'alcanes |
| WO2020081421A1 (fr) | 2018-10-15 | 2020-04-23 | Uop Llc | Procédé de déshydrogénation ayant un temps d'exécution amélioré |
-
2022
- 2022-05-10 FR FR2204397A patent/FR3135458B1/fr active Active
-
2023
- 2023-05-05 CN CN202380039435.4A patent/CN119173491A/zh active Pending
- 2023-05-05 WO PCT/FR2023/000083 patent/WO2023218140A1/fr not_active Ceased
- 2023-05-05 KR KR1020247040658A patent/KR20250008775A/ko active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3723557A (en) | 1970-02-24 | 1973-03-27 | Universal Oil Prod Co | Dehydrogenation with a catalytic composite containing platinum, rhenium, germanium and an alkali or alkaline earth metal |
| EP0305144A2 (fr) * | 1987-08-24 | 1989-03-01 | Canon Kabushiki Kaisha | Méthode pour former un film semi-conducteur cristallin composé |
| WO1992000261A1 (fr) * | 1990-06-22 | 1992-01-09 | Exxon Chemical Patents Inc. | Procede permettant l'adsorption d'especes de soufre a partir de propylene/propane a l'aide d'un adsorbant pouvant être regenere |
| US5336829A (en) * | 1992-03-26 | 1994-08-09 | Institut Francais Du Petrole | Continuous process for the dehydrogenation of paraffinic to olefinic hydrocarbons |
| WO2011012815A1 (fr) | 2009-07-31 | 2011-02-03 | Arkema France | Composition à base de sulfure organique à odeur masquée |
| WO2015152160A1 (fr) * | 2014-03-31 | 2015-10-08 | 三井化学株式会社 | Procédé de production d'un hydrocarbure insaturé |
| WO2016027219A1 (fr) * | 2014-08-21 | 2016-02-25 | Sabic Global Technologies B.V. | Systèmes et procédés pour la déshydrogénation d'alcanes |
| EP3240770A1 (fr) | 2014-12-31 | 2017-11-08 | SABIC Global Technologies B.V. | Procédé permettant d'améliorer la performance de la déshydrogénation d'alcanes |
| WO2020081421A1 (fr) | 2018-10-15 | 2020-04-23 | Uop Llc | Procédé de déshydrogénation ayant un temps d'exécution amélioré |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119173491A (zh) | 2024-12-20 |
| KR20250008775A (ko) | 2025-01-15 |
| FR3135458A1 (fr) | 2023-11-17 |
| FR3135458B1 (fr) | 2025-08-01 |
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