WO2007126138A1 - プロピレンオキサイドの製造方法 - Google Patents
プロピレンオキサイドの製造方法 Download PDFInfo
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- WO2007126138A1 WO2007126138A1 PCT/JP2007/059433 JP2007059433W WO2007126138A1 WO 2007126138 A1 WO2007126138 A1 WO 2007126138A1 JP 2007059433 W JP2007059433 W JP 2007059433W WO 2007126138 A1 WO2007126138 A1 WO 2007126138A1
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- WIPO (PCT)
- Prior art keywords
- propylene
- fluid
- propylene oxide
- solvent
- water
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- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 57
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 57
- 239000002904 solvent Substances 0.000 claims abstract description 55
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000006735 epoxidation reaction Methods 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 claims abstract description 36
- 150000002825 nitriles Chemical class 0.000 claims abstract description 27
- 239000003054 catalyst Substances 0.000 claims abstract description 20
- 239000007791 liquid phase Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 21
- 239000001301 oxygen Substances 0.000 claims description 21
- 229910052760 oxygen Inorganic materials 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000011148 porous material Substances 0.000 claims description 3
- 239000002243 precursor Substances 0.000 claims description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 84
- 239000012530 fluid Substances 0.000 description 61
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 30
- 238000010521 absorption reaction Methods 0.000 description 27
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 239000012046 mixed solvent Substances 0.000 description 15
- 239000001294 propane Substances 0.000 description 15
- 238000000926 separation method Methods 0.000 description 15
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 14
- 239000000203 mixture Substances 0.000 description 14
- 239000001257 hydrogen Substances 0.000 description 12
- 229910052739 hydrogen Inorganic materials 0.000 description 12
- 238000011084 recovery Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 239000011261 inert gas Substances 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000007810 chemical reaction solvent Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 6
- 150000002431 hydrogen Chemical class 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- -1 glycol ethers Chemical class 0.000 description 4
- 230000002194 synthesizing effect Effects 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- PBCJIPOGFJYBJE-UHFFFAOYSA-N acetonitrile;hydrate Chemical compound O.CC#N PBCJIPOGFJYBJE-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 238000007429 general method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- QMGLMRPHOITLSN-UHFFFAOYSA-N 2,4-dimethyloxolane Chemical compound CC1COC(C)C1 QMGLMRPHOITLSN-UHFFFAOYSA-N 0.000 description 1
- RYPKRALMXUUNKS-UHFFFAOYSA-N 2-Hexene Natural products CCCC=CC RYPKRALMXUUNKS-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002002 slurry 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
- 239000004071 soot Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000012690 zeolite precursor Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/02—Synthesis of the oxirane ring
- C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
- C07D301/12—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with hydrogen peroxide or inorganic peroxides or peracids
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/89—Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium
-
- B01J35/19—
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B61/00—Other general methods
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
- C07D303/02—Compounds containing oxirane rings
- C07D303/04—Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
-
- 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
- B01J23/44—Palladium
-
- 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 present invention relates to a method for producing propylene oxide, which comprises a step of efficiently recovering unreacted propylene, propylene oxide in a vent gas, etc. in a method for producing propylene oxide by carrying out an epoxidation reaction of propylene. It is.
- the gas discharged from the separation step is methanol.
- Propylene and propylene oxide are recovered by contacting with alcohols, glycols, cyclic ethers, glycol ethers, ketones, etc., and propylene is recycled (for example, Patent Document 1 (International Publication No. 0 1 / 5 7 0 0 No. 9 pamphlet))).
- the patent document describes that methanol used as a reaction solvent is particularly preferable, but there is a problem that the methanol solvent does not necessarily have sufficient absorption efficiency for unreacted propylene.
- the present invention provides a method for efficiently producing propylene by solving the problems in the epoxidation reaction.
- this paper describes a process for producing propylene oxide by reacting hydrogen peroxide with propylene in the liquid phase in the presence of an epoxidation catalyst, and a recyclable component in the bent gas produced in the process.
- the present invention relates to a method for producing propylene-containing oxides, which comprises a step of absorbing and recovering nitrile in a solvent containing nitrile.
- FIG. 1 is an example of a block flow diagram of a general method for producing propylene oxide according to the present invention, supplying hydrogen peroxide, using a mixed solvent of acetonitrile and water in an epoxidation step, and an absorption step Is an example of a method using a mixed solvent of acetonitrile and water which is the same as the solvent used in the epoxidation step.
- FIG. 2 is an example of a block flow diagram of a general method for producing propylene oxide according to the present invention, in which hydrogen peroxide is synthesized in the system by hydrogen and oxygen, and acetonitrile and water are mixed in the epoxidation step.
- This is an example of a method using a solvent using a acetonitrile solvent in which water is separated in a solvent purification step from a mixed solvent of acetonitrile and water obtained in a solvent recovery step.
- titanosilicate catalyst As a catalyst for carrying out the epoxidation reaction of propylene using hydrogen peroxide, a titanosilicate catalyst can be mentioned.
- Examples of a method for supplying hydrogen peroxide include a method for supplying a hydrogen peroxide solution produced in advance, or a method for synthesizing and supplying hydrogen peroxide in a reaction system.
- a method of synthesizing hydrogen peroxide in the reaction system a transition metal catalyst that synthesizes hydrogen peroxide such as Pd and Au from the hydrogen and oxygen is supported on the catalyst of the epoxidation reaction.
- the concentration of hydrogen peroxide in the hydrogen peroxide solution is usually 0.1 to 70 weight. / 0 .
- the hydrogen peroxide solution include an aqueous hydrogen peroxide solution or a mixed solution of hydrogen peroxide, water, and an organic solvent.
- the reaction temperature of the epoxidation reaction of propylene according to the present invention is about 0 ° C to 150 ° C and the reaction pressure is about 0.1 MPa to 2 OMPa.
- Examples of the reaction method include a fixed bed flow reaction method and a slurry reaction method.
- Examples of the solvent for the epoxidation reaction include a single type of nitrile, a mixed solvent of two or more types of -tolyl, or a mixed solvent of -tolyl and water, a mixed solvent of alcohol, and alcohol water.
- Examples of nitrile include acetonitrile, propionitrile, and benzonitrile.
- As the alcohol methanol, ethanol, 1-propanol, 2-propanol, n-butanol, sec-butane, and t-butanol can be used alone or two or more kinds of mixed solvents can be raised.
- acetonitrile A mixed solvent of acetonitrile water, methanol or a mixed solvent of methanol water is preferable because they are easily available and inexpensive. Further, acetonitrile and methanol are water-soluble, and the liquid phase becomes uniform, which is preferable in terms of easy process construction.
- the vent gas generated in the separation step after the epoxidation step contains unreacted propylene, which is a recyclable component, as a representative component, and may contain propylene oxide, which is a reaction product. This is also a component that can be recycled to the epoxidation process.
- propylene oxide which is a reaction product.
- oxygen is formed as a by-product due to the decomposition of hydrogen peroxide within the reaction unit, and this is accumulated and becomes a soot concentration.
- nitrogen, carbon dioxide Inert gas, methane, ethane or propane may be supplied into the system. For this reason, these inert gases may be contained in the vent gas.
- an inexpensive oxygen source such as compressed air or oxygen containing a small amount of nitrogen synthesized by PSA (Pressure Swing Adsorption) was used. In some cases, these inert gases are also included in the vent gas.
- propylene When hydrogen peroxide is synthesized in the system from hydrogen and oxygen and used in the epoxidation reaction, propylene may burn and carbon dioxide may be produced as a by-product.
- the inert gas or impurities in propylene that are inert to the epoxidation of propylene such as nitrogen and carbon dioxide may accumulate in the vent gas.
- these accumulated substances and inert gas can be removed from the system as vent gas.
- Solvents containing nitrile used to recover propylene oxide and unreacted propylene from vent gas include single nitrile, mixed nitrile of two or more nitriles, or mixed solvent of ethryl and water. It is done. Examples of nitrile include acetonitrile, propionitrile, and benzonitrile. solvent It is preferable to use the same solvent as the epoxidation reaction solvent from the viewpoint of easy recovery. When a mixed solvent of tolyl and water that forms a homogeneous phase with water is used as the reaction solvent, it is usually preferable to carry out the reaction with a composition having a higher water content than the azeotropic composition from the viewpoint of reducing recovered energy. .
- the melting point is higher than that of nitrile alone, so that components that can be recycled in the absorption process are introduced into the gas phase.
- the lower limit temperature is limited and disadvantageous.
- the solvent when a mixed solvent of water and water that forms a homogeneous phase with water is used as a reaction solvent, the solvent is first recovered from the mixed solvent in a solvent recovery step, and then a part of the recovered solvent is purified by solvent. More preferably, it is subjected to a process to separate water and used as a solvent having a low water content in the absorption process.
- the water content of the solvent used in the absorption process is determined by the number of distillation columns, the reflux ratio, and the melting point during cooling, but is usually 1 weight percent or less, preferably 0.1 weight percent or less. is there.
- the absorption liquid containing nitrile that has absorbed propylene and propylene oxide obtained in the absorption process is supplied as it is to the epoxidation process when the solvents in the absorption process and the epoxidation process are the same. If the absorption process and the epoxidation process have different solvents, either the recyclable components are separated by distillation, and then only the recyclable components are supplied to the epoxidation process, or ice is added to the absorption liquid and the solvent composition. After being adjusted to the solvent composition of the epoxidation process, it is used in the epoxidation process. When additional water is supplied, insufficient water may be additionally supplied to adjust the water in accordance with the composition of the reaction solvent in the epoxidation process when the absorbent is supplied to the epoxidation process.
- a method of separating water in a solvent purification step from a mixed solvent of nitrile and water that form a homogeneous phase with water as a reaction solvent for example, using an adsorbent such as molecular sieve zeolite, or nitrile by distillation. And a method of removing water from the water.
- an adsorbent such as molecular sieve zeolite, or nitrile by distillation.
- rectification is performed first at a pressure at which the concentration of -tolyl is high.
- a crystalline titanosilicate having an MWW structure or a titanosilicate such as a layered precursor of a crystalline titanosilicate having an MWW structure is used as a reaction solvent.
- Silicate is exemplified.
- a titanosilicate catalyst having a pore structure of oxygen 12-membered ring or more is preferable in that a high activity can be obtained when a solvent containing nitrile is used.
- Ti 1 MWW catalyst, layered titanosilicate catalyst Is more preferable.
- Ti-MWW is a crystalline titanosilicate having the MWW structure with the structure code of IZA (International Zolite Society).
- a layered titanosilicate for example, a layered precursor of Ti-MWW zeolite described in Chemistry Letters, 774-775, (2000) is known. For example, it can be confirmed from the X-ray diffraction peak as described in Catalyst, 158, V o 143, (2001) that the Ti-MW W zeolite precursor has a layer structure.
- fluid 1 is propylene, hydrogen peroxide solution, acetonitrile, and inert gas.
- Fluid 2 is the epoxidation reaction distillate. Fluid 2 is separated into gas fluid 3 and liquid fluid 4 in the separation process. Liquid fluid 4 is separated into fluid 5, fluid 6, and fluid 7 in the separation and purification process, and commercialized, recycled, and purged. The product propylene oxide can be removed as fluid 5.
- Fluid 6 consists mainly of propylene and propane. Fluid 6 is partly recycled to the epoxidation process and part is sent to the propane separation process. In the propane separation process, usually propylene is recovered from the top (fluid 8), and propane is separated from the bottom (fluid 9).
- Fluid 7 is composed of raw water and acetonitrile, and may contain propylene glycol and oligomers thereof. Part of fluid 7 is recycled to the epoxidation process and part is supplied to the solvent recovery process. In the solvent recovery process, acetotril and water are recovered from the top with an azeotropic composition (fluid 10), and high-boiling compounds such as water and propylene glycol and oligomers are separated from the bottom, and some of them are discarded (fluid 11).
- the rest is epoxidation process (fluid 12) and It is supplied to an absorption process (fluid 13) that recovers recyclable components in the vent gas.
- the gas fluid 3 separated in the separation step contains an inert gas, propylene, oxygen, and propylene oxide. Part of fluid 3 is purged from the vent line, and the rest is supplied to the absorption process. Fluid 3 comes into contact with the mixture of acetonitrile and water (fluid 13) obtained in the solvent recovery process in the absorption process, and propylene and propylene oxide are recovered and supplied to the re-epoxidation process. . The remaining gas fluid after recovering recyclable components is purged out of the system.
- fluid 1 is propylene, hydrogen, oxygen, nitrogen, acetonitrile, water, and inert gas.
- Fluid 2 is an epoxidation reaction liquid
- fluid 3 is an epoxidation reaction gas.
- Fluid 2 is supplied to the solvent separation process, and fluid 3 is subjected to the absorption process.
- Fluid 2 is mainly composed of acetonitrile, water, propylene oxide, propylene, propylene glycol, and propane.
- Fluid 3 is mainly composed of hydrogen, oxygen, nitrogen, propylene oxide, propylene, and propane.
- Fluid 2 in the solvent separation process is fluid 4 mainly composed of acetonitrile, which is a high boiling point component, water and propylene darlicol, and fluid mainly composed of propylene oxide, propylene and propane, which are light boiling components.
- Fluid 5 is separated in a crude propylene oxide separation step into fluid 6 containing propylene oxide as a main component and fluid 7 containing propylene and propane as main components.
- Fluid 6 is refined into purified propylene oxide in the purification process to become a product (fluid 8).
- Fluid 7 is partly recycled to the epoxidation process and part is sent to the propan separation process.
- propylene is usually collected from the top (fluid 9) and propane is separated from the bottom (fluid 10).
- the recovered propylene (fluid 9) is again supplied to the epoxidation process.
- a part of the fluid 4 consisting mainly of acetonitrile, water and propylene dallicol is recycled to the epoxidation process and partly supplied to the solvent recovery process.
- acetonitrile and water are recovered from the top with an azeotropic composition (fluid 1 1), and high-boiling compounds such as water and propylene glycol oligomers are separated from the bottom, and the waste process (fluid 1 2) sent to.
- a part of the fluid 11 is sent to the solvent purification process (fluid 13), and the rest is supplied to the epoxidation process (fluid 14).
- a mixture of acetonitrile and water which is an azeotropic composition, is supplied with a 1% acetononitrile content by the pressure swing method. It is separated into water (fluid 15) that is less than one cent and acetonitrile (fluid 16) that has a water content of less than 1 percent by weight. Fluid 15 is applied to the disposal process and fluid 16 is applied to the absorption process.
- Fluid 17 is mainly composed of acetonitrile and propylene oxide and propylene. Fluid 17 is again fed to the epoxidation reaction process. The remaining gas fluid after the recovery of propylene oxide and propylene is purged out of the system.
- propylene oxide and propylene in the vent gas can be more efficiently recovered by absorbing propylene oxide and propylene in the vent gas with a nitrile solvent.
- Preferred nitrinole solvents include acetonitol, propio-tolyl and the like.
- the conditions for absorbing propylene oxide and propylene in the vent gas with a nitrile solvent are usually as follows: temperature 0 ° C to 80 ° C (absorption liquid temperature of absorption tower), absorption tower pressure 0 MP a to 2MP a (absolute pressure). If the temperature is too high, the absorption efficiency decreases, and if it is too low, the energy cost for cooling increases. If the pressure is too high, the energy cost of compression will increase, and if it is too low, the absorption efficiency will decrease.
- the vent gas is dispersed in the nitrile solvent with a spargeer or the like and absorbed.
- a preferable method is to supply the -tolyl solvent from the upper part of the absorption tower packed with a packing for increasing the pressure and to supply the gas from the lower part and make it counter-contact and absorb.
- the present invention is illustrated by examples. That, 26 ° C, under atmospheric pressure, by means of a thermal mass flow controller of all, propylene gas 3. 3 X 1 0- 7 m 3 / s, the nitrogen gas 3. 0 X 10- 6 m 3 Zs to control gas Mixed with 0.1 kg of acetonitrile solvent Pupling inside. Sampling was performed by removing the solution 30 minutes after the start of absorption. Analysis was performed using gas chromatography. As a result, the amount of propylene absorbed per unit solvent weight was 0.0477mo 1 Zkg.
- Example 2 The experiment was performed in the same manner as in Example 1 except that a methanol solvent was used instead of the acetonitrile solvent. As a result, the amount of propylene absorbed per unit solvent weight was 0.0425 mo 1 / kg.
- the absolute pressure was adjusted to 4 MPa with nitrogen, and the temperature in the autoclave was adjusted to 60 ° C by circulating hot water through the jacket.
- Acetonitrile water containing 7 mmo 1 / kg acetonitrile / water weight ratio is 80/20
- propylene solution containing 0.4 volume percent propane at 31.0 gZHr.
- the reaction temperature was controlled to 60 ° C and the reaction pressure to 4 MPa.
- the acetonitrile solvent obtained by separating water in the solvent purification process from the mixed solvent of acetonitrile and water obtained in the solvent recovery process is used.
- Propylene oxide can be advantageously produced by the method of the present invention.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07742868A EP2014654A4 (en) | 2006-04-27 | 2007-04-26 | PROCESS FOR PRODUCTION OF PROPYLENE OXIDE |
US12/226,730 US7915434B2 (en) | 2006-04-27 | 2007-04-26 | Method for producing propylene oxide |
BRPI0710797-8A BRPI0710797A2 (pt) | 2006-04-27 | 2007-04-26 | método para produção de óxido de propileno |
Applications Claiming Priority (2)
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JP2006-123128 | 2006-04-27 | ||
JP2006123128 | 2006-04-27 |
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WO2007126138A1 true WO2007126138A1 (ja) | 2007-11-08 |
Family
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PCT/JP2007/059433 WO2007126138A1 (ja) | 2006-04-27 | 2007-04-26 | プロピレンオキサイドの製造方法 |
Country Status (6)
Country | Link |
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US (1) | US7915434B2 (ja) |
EP (1) | EP2014654A4 (ja) |
KR (1) | KR20090011002A (ja) |
CN (1) | CN101432271A (ja) |
BR (1) | BRPI0710797A2 (ja) |
WO (1) | WO2007126138A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101802535B1 (ko) * | 2009-07-16 | 2017-11-28 | 바스프 에스이 | 물로부터 아세토니트릴을 분리하는 방법 |
CN105358536B (zh) * | 2013-04-29 | 2018-02-09 | 巴斯夫欧洲公司 | 部分料流蒸馏 |
EP3406603A1 (en) | 2017-05-22 | 2018-11-28 | Evonik Degussa GmbH | Process for the epoxidation of propene |
CN111116517B (zh) * | 2018-10-30 | 2022-11-04 | 中国石油化工股份有限公司 | 环氧丁烷回收方法 |
CN111116516B (zh) * | 2018-10-30 | 2022-10-11 | 中国石油化工股份有限公司 | 用于环氧烷烃的回收方法 |
CN111116518A (zh) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | 环氧烷烃的回收利用方法 |
CN111116519B (zh) * | 2018-10-30 | 2022-11-01 | 中国石油化工股份有限公司 | 环氧烷烃利用方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001057009A1 (en) | 2000-02-07 | 2001-08-09 | Degussa Ag | Process for the epoxidation of olefins |
WO2002092586A1 (en) * | 2001-05-14 | 2002-11-21 | Solvay (Société Anonyme) | Process for manufacturing an oxirane |
WO2004078740A1 (ja) | 2003-03-06 | 2004-09-16 | Sumitomo Chemical Company, Limited | プロピレンオキサイドの製造方法 |
JP2004269380A (ja) | 2003-03-06 | 2004-09-30 | Sumitomo Chem Co Ltd | プロピレンオキサイドの製造方法 |
WO2004099166A1 (de) | 2003-05-08 | 2004-11-18 | Basf Aktiengesellschaft | Verfahren zur herstellung von propylenoxid |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20010054622A (ko) * | 1999-12-07 | 2001-07-02 | 서평원 | 음성 인식 시스템의 음성 인식률 향상 방법 |
AU2003213533A1 (en) * | 2002-03-04 | 2003-09-16 | Sumitomo Chemical Company, Limited | Method for producing propylene oxide |
US7531674B2 (en) * | 2003-03-06 | 2009-05-12 | Sumitomo Chemical Company, Limited | Process for producing propylene oxide |
-
2007
- 2007-04-26 BR BRPI0710797-8A patent/BRPI0710797A2/pt not_active IP Right Cessation
- 2007-04-26 WO PCT/JP2007/059433 patent/WO2007126138A1/ja active Application Filing
- 2007-04-26 CN CNA2007800151688A patent/CN101432271A/zh active Pending
- 2007-04-26 KR KR1020087028881A patent/KR20090011002A/ko not_active Application Discontinuation
- 2007-04-26 US US12/226,730 patent/US7915434B2/en not_active Expired - Fee Related
- 2007-04-26 EP EP07742868A patent/EP2014654A4/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001057009A1 (en) | 2000-02-07 | 2001-08-09 | Degussa Ag | Process for the epoxidation of olefins |
WO2002092586A1 (en) * | 2001-05-14 | 2002-11-21 | Solvay (Société Anonyme) | Process for manufacturing an oxirane |
WO2004078740A1 (ja) | 2003-03-06 | 2004-09-16 | Sumitomo Chemical Company, Limited | プロピレンオキサイドの製造方法 |
JP2004269380A (ja) | 2003-03-06 | 2004-09-30 | Sumitomo Chem Co Ltd | プロピレンオキサイドの製造方法 |
WO2004099166A1 (de) | 2003-05-08 | 2004-11-18 | Basf Aktiengesellschaft | Verfahren zur herstellung von propylenoxid |
Non-Patent Citations (1)
Title |
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See also references of EP2014654A4 |
Also Published As
Publication number | Publication date |
---|---|
US20090270641A1 (en) | 2009-10-29 |
CN101432271A (zh) | 2009-05-13 |
KR20090011002A (ko) | 2009-01-30 |
EP2014654A1 (en) | 2009-01-14 |
EP2014654A4 (en) | 2010-12-15 |
BRPI0710797A2 (pt) | 2011-08-09 |
US7915434B2 (en) | 2011-03-29 |
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