WO2014123610A1 - Procédés utilisant un tamis moléculaire ssz-85 - Google Patents
Procédés utilisant un tamis moléculaire ssz-85 Download PDFInfo
- Publication number
- WO2014123610A1 WO2014123610A1 PCT/US2013/072793 US2013072793W WO2014123610A1 WO 2014123610 A1 WO2014123610 A1 WO 2014123610A1 US 2013072793 W US2013072793 W US 2013072793W WO 2014123610 A1 WO2014123610 A1 WO 2014123610A1
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- WO
- WIPO (PCT)
- Prior art keywords
- catalyst
- molecular sieve
- ssz
- hydrocarbons
- hydrocarbon
- Prior art date
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 239000002808 molecular sieve Substances 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims description 121
- 230000008569 process Effects 0.000 title claims description 100
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 28
- 239000010941 cobalt Substances 0.000 claims abstract description 28
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003054 catalyst Substances 0.000 claims description 183
- 150000002430 hydrocarbons Chemical class 0.000 claims description 98
- 229930195733 hydrocarbon Natural products 0.000 claims description 97
- 238000006243 chemical reaction Methods 0.000 claims description 92
- 239000007789 gas Substances 0.000 claims description 59
- 150000001336 alkenes Chemical class 0.000 claims description 57
- 239000000203 mixture Substances 0.000 claims description 50
- 239000004215 Carbon black (E152) Substances 0.000 claims description 49
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 38
- 239000001257 hydrogen Substances 0.000 claims description 29
- 229910052739 hydrogen Inorganic materials 0.000 claims description 29
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 29
- 230000015572 biosynthetic process Effects 0.000 claims description 28
- 238000006317 isomerization reaction Methods 0.000 claims description 25
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 23
- 238000002441 X-ray diffraction Methods 0.000 claims description 19
- 229910052757 nitrogen Inorganic materials 0.000 claims description 19
- 238000003786 synthesis reaction Methods 0.000 claims description 17
- 150000001768 cations Chemical class 0.000 claims description 16
- 238000006116 polymerization reaction Methods 0.000 claims description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 14
- 150000001298 alcohols Chemical class 0.000 claims description 14
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 14
- 239000003344 environmental pollutant Substances 0.000 claims description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- 231100000719 pollutant Toxicity 0.000 claims description 14
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910001868 water Inorganic materials 0.000 claims description 13
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 12
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- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 9
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 230000029936 alkylation Effects 0.000 claims description 7
- 238000005804 alkylation reaction Methods 0.000 claims description 7
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- 239000010687 lubricating oil Substances 0.000 claims description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 4
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 238000004523 catalytic cracking Methods 0.000 claims description 4
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- FYPVBTXELDUXDV-UHFFFAOYSA-N 1,3-di(propan-2-yl)imidazol-1-ium Chemical compound CC(C)N1C=C[N+](C(C)C)=C1 FYPVBTXELDUXDV-UHFFFAOYSA-N 0.000 abstract description 5
- 239000002184 metal Substances 0.000 description 66
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- -1 fluoride ions Chemical class 0.000 description 51
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 25
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 24
- 230000003197 catalytic effect Effects 0.000 description 24
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 24
- 239000002904 solvent Substances 0.000 description 23
- VEZUQRBDRNJBJY-UHFFFAOYSA-N cyclohexanone oxime Chemical compound ON=C1CCCCC1 VEZUQRBDRNJBJY-UHFFFAOYSA-N 0.000 description 22
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- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 20
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 18
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 17
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 17
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 17
- 239000000463 material Substances 0.000 description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
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- 239000007787 solid Substances 0.000 description 15
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 13
- 125000004432 carbon atom Chemical group C* 0.000 description 13
- 239000013078 crystal Substances 0.000 description 13
- 239000000446 fuel Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 13
- 229910052697 platinum Inorganic materials 0.000 description 13
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 12
- 239000005977 Ethylene Substances 0.000 description 12
- 229910021536 Zeolite Inorganic materials 0.000 description 12
- 238000002425 crystallisation Methods 0.000 description 12
- 230000008025 crystallization Effects 0.000 description 12
- 229910000510 noble metal Inorganic materials 0.000 description 12
- 239000011148 porous material Substances 0.000 description 12
- 229910052717 sulfur Inorganic materials 0.000 description 12
- 239000011593 sulfur Substances 0.000 description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 11
- 239000003085 diluting agent Substances 0.000 description 11
- 230000036961 partial effect Effects 0.000 description 11
- 238000009835 boiling Methods 0.000 description 10
- 238000001354 calcination Methods 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 10
- 150000002736 metal compounds Chemical class 0.000 description 10
- 229910052763 palladium Inorganic materials 0.000 description 10
- 230000000737 periodic effect Effects 0.000 description 10
- 239000002002 slurry Substances 0.000 description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 9
- 239000002253 acid Substances 0.000 description 9
- 125000000217 alkyl group Chemical group 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 9
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- 229910052759 nickel Inorganic materials 0.000 description 9
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
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- 125000003118 aryl group Chemical group 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
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- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 7
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B37/00—Compounds having molecular sieve properties but not having base-exchange properties
- C01B37/06—Aluminophosphates containing other elements, e.g. metals, boron
- C01B37/065—Aluminophosphates containing other elements, e.g. metals, boron the other elements being metals only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
- B01J20/186—Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
-
- 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
- B01J29/82—Phosphates
- B01J29/84—Aluminophosphates containing other elements, e.g. metals, boron
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
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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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/63—Pore volume
- B01J35/635—0.5-1.0 ml/g
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2529/00—Catalysts comprising molecular sieves
- C07C2529/82—Phosphates
- C07C2529/84—Aluminophosphates containing other elements, e.g. metals, boron
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- 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
- This disclosure relates generally to uses for a new cobalt aluminophosphate molecular sieve designated SSZ-85 which is prepared using a 1,3-diispropylimidazolium ionic liquid.
- crystalline molecular sieves and zeolites are especially useful in applications such as hydrocarbon conversion, gas drying and separation. Although many different crystalline molecular sieves have been disclosed, there is a continuing need for new molecular sieves with desirable properties for gas separation and drying, hydrocarbon and chemical conversions, and other applications. New molecular sieves can contain novel internal pore architectures, providing enhanced selectivities in these processes.
- Molecular sieves have been conventionally prepared by hydrothermal synthesis, wherein an aqueous reaction mixture containing a tetrahedral atom source(s), a mineralizer, and a structure directing agent is heated under autogenous pressure in an autoclave. More recently, it has been reported that molecular sieves can be prepared by ionothermal synthesis, wherein an ionic liquid is used as both the solvent and the structure directing agent ("SDA”), also known as a crystallization template (see, e.g., E.R. Cooper et al, Nature 2004, 430, 1012-16; and E.R. Parnham et al, J. Am. Chem. Soc. 2006, 128, 2204- 2205).
- SDA structure directing agent
- Ionic liquids are a class of compounds made up entirely of ions and are generally liquids at ambient and near ambient temperatures. Ionic liquids tend to be liquids over a very wide temperature range, with some having a liquid range of up to 300°C or higher. Ionic liquids are generally non- volatile, with effectively no vapor pressure. Many are air and water stable, and can be good solvents for a wide variety of inorganic, organic, and polymeric materials.
- Ionothermal synthesis of molecular sieves has several advantages over conventional hydrothermal synthesis. Safety concerns associated with operating under high pressures during hydrothermal synthesis are eliminated. Since most ionic liquids are generally non-volatile, with effectively no vapor pressure, no autogenous pressure is produced on heating thereby allowing molecular sieve synthesis to take place at high temperature while keeping the pressure at ambient levels. Moreover, the ionic liquid used in ionothermal synthesis can be recycled for further use.
- the present disclosure is directed to uses for a family of crystalline cobalt aluminophosphate molecular sieves with unique properties, referred to herein as "molecular sieve SSZ-85” or simply “SSZ-85.”
- a cobalt aluminophosphate molecular sieve having, in its calcined form, the powder X-ray diffraction (XRD) lines of Table 3.
- a method for preparing a cobalt aluminophosphate molecular sieve by contacting under crystallization conditions (1) at least one source of cobalt; (2) at least one source of aluminum; (3) at least one source of phosphorus; (4) fluoride ions; and (5) a 1,3-diisopropylimidazolium ionic liquid.
- p is the number of moles of 1,3-diispropylimidazolium cation (Q) per mole of (Co x Al y P z )0 2 and p has a value of from 0.001 to 1 ; wherein a is the number of moles of fluoride ion (F) per mole of (Co x Al y P z )0 2 and a has a value of from 0 to 1, inclusive (0 ⁇ a ⁇ 1) ; wherein x, y, and z represent the mole fraction of Co, Al, and P, respectively, as tetrahedral units; and wherein x, y, and z are each a value greater than zero and less than one and the sum of x, y, and z is one.
- FIG. 1 is a powder XRD pattern of as-synthesized SSZ-85 prepared according to Example 1.
- FIG. 2 is a powder XRD pattern of calcined SSZ-85 prepared according Example 2.
- FIG. 3 shows the adsorption of n-hexane in SSZ-85 and several other molecular sieves.
- active source means a reagent or precursor capable of supplying at least one element in a form that can react and which can be incorporated into the molecular sieve structure.
- cobalt aluminophosphate molecular sieve refers to a molecular sieve which has a three-dimensional microporous framework structure comprising [Co0 2 ], [A10 2 ] and [PO2] tetrahedral units.
- the cobalt aluminophosphate molecular sieve can also contain [M0 2 ] tetrahedral units incorporated into the framework structure wherein M is a metal selected from the group consisting of silicon (Si), magnesium (Mg), manganese (Mn) iron (Fe), nickel (Ni), zinc (Zn), and mixtures thereof.
- ionic liquid refers to liquids that are composed entirely of ions as a combination of cations and anions.
- ionic liquid includes low-temperature ionic liquids, which are generally organic salts with melting points under 100°C and often even lower than room temperature.
- SSZ-85 is prepared by ionothermal synthesis, wherein an ionic liquid is used as both the solvent and the structure directing agent ("SDA"), rather than via conventional hydrothermal synthesis.
- Imidazolium-based ionic liquids are among the most commonly used ionic liquids.
- a 1,3-diisopropylimidazolium ionic liquid is used for the ionothermal synthesis of SSZ-85 and is represented by the following structure (1):
- a " is any anionic counterion that is not detrimental to the formation of the molecular sieve.
- Representative anions include halogen (e.g., fluoride, chloride, bromide, iodide), hydroxide, acetate, sulfate, tetrafluoroborate, carboxylate, and the like.
- molecular sieve SSZ-85 is prepared by: (a) preparing a reaction mixture containing: (1) at least one source of cobalt; (2) at least one source of aluminum; (3) at least one source of phosphorus; (4) fluoride ions; and (5) a 1,3-diisopropylimidazolium ionic liquid; and (b) maintaining the reaction mixture under conditions sufficient to form crystals of the molecular sieve.
- Q is a 1,3-diisopropylimidazolium cation.
- the Q/A1 2 0 3 mole ratio is at least 5 (e.g., from 5 to 5000, from 5 to 1000, from 5 to 500, from 5 to 250, or from 5 to 100).
- Suitable sources of cobalt (Co) include water-soluble cobalt salts, such as oxides, hydroxides, nitrates, sulfates, halides, and carboxylates.
- suitable aluminum (Al) sources include hydrated aluminum oxides (e.g., boehmite, pseudoboehmite) and aluminum trialkoxides.
- a suitable source of phosphorous (P) is phosphoric acid.
- Suitable sources of fluoride ions (F) include hydrogen fluoride and ammonium fluoride.
- the reaction mixture can contain a source of a second divalent metal (e.g., Mn and/or Zn).
- a source of a second divalent metal e.g., Mn and/or Zn
- these metals will replace Al in the lattice so the amount of Al provided in the reaction mixture is reduced accordingly.
- suitable sources of divalent metal are the metal salts such as chloride, acetate, nitrate and sulfate salts.
- the reaction mixture can contain a source of silicon.
- Si will replace P in the lattice so the amount of P provided in the reaction mixture is reduced accordingly.
- suitable sources of silicon include fumed silica, precipitated silicates, silica hydrogel, silicic acid, colloidal silica, tetra-alkyl orthosilicates (e.g., tetraethyl orthosilicate), and silica hydroxides.
- the molecular sieve reaction mixture can be supplied by more than one source. Also, two or more reaction components can be provided by one source.
- the reaction mixture can be prepared either batch wise or continuously. Crystal size, morphology and crystallization time of the molecular sieve described herein can vary with the nature of the reaction mixture and the synthesis conditions.
- the molecular sieve is prepared by: (a) preparing a reaction mixture as described herein above; and (b) maintaining the reaction mixture under crystallization conditions sufficient to form crystals of the molecular sieve.
- the reaction mixture is maintained at an elevated temperature until the crystals of the molecular sieve are formed.
- the crystallization is usually conducted in an autoclave at a temperature between 125°C and 200°C (e.g., from 150°C to 200°C, or from 150°C to 170°C).
- the reaction mixture can be subjected to mild stirring or agitation during the crystallization step.
- the molecular sieve described herein can contain impurities, such as amorphous materials, unit cells having framework topologies which do not coincide with the molecular sieve, and/or other impurities (e.g., organic hydrocarbons).
- the molecular sieve crystals can be allowed to nucleate spontaneously from the reaction mixture.
- the use of crystals of the molecular sieve as seed material can be advantageous in decreasing the time necessary for complete crystallization to occur.
- seeding can lead to an increased purity of the product obtained by promoting the nucleation and/or formation of the molecular sieve over any undesired phases.
- seed crystals are added to the reaction mixture in an amount of at least 0.1 ppm (e.g., at least 10 ppm, at least 100 ppm, or at least 500 ppm), based on the total weight of the reaction mixture.
- the solid product is separated from the reaction mixture by standard mechanical separation techniques such as filtration.
- the crystals are water-washed and then dried to obtain the as-synthesized molecular sieve crystals.
- the drying step can be performed at atmospheric pressure or under vacuum.
- the ionic liquid can be recovered from the reaction mixture using any of a variety of techniques (e.g., solvent extraction, decantation) for subsequent use.
- the molecular sieve can be used as-synthesized, but typically will be thermally treated (calcined).
- the term "as-synthesized” refers to the molecular sieve in its form after crystallization, prior to removal of the SDA cation.
- the SDA cation can be removed by thermal treatment (e.g., calcination), preferably in an oxidative atmosphere (e.g., air, gas with an oxygen partial pressure of greater than 0 kPa) at a temperature readily determinable by one skilled in the art sufficient to remove the SDA cation from the molecular sieve.
- an oxidative atmosphere e.g., air, gas with an oxygen partial pressure of greater than 0 kPa
- the SDA cation can also be removed by photolysis techniques (e.g., exposing the SDA-containing molecular sieve product to light or electromagnetic radiation that has a wavelength shorter than visible light under conditions sufficient to selectively remove the organic compound from the molecular sieve) as described in U.S. Patent No. 6,960,327.
- photolysis techniques e.g., exposing the SDA-containing molecular sieve product to light or electromagnetic radiation that has a wavelength shorter than visible light under conditions sufficient to selectively remove the organic compound from the molecular sieve
- the molecular sieve can subsequently be calcined in steam, air or inert gas at temperatures ranging from 200°C to 800°C for periods of time ranging from 1 to 48 hours, or more.
- the molecular sieve made from the process described herein can be formed into a wide variety of physical shapes.
- the molecular sieve can be in the form of a powder, a granule, or a molded product, such as extrudate having a particle size sufficient to pass through a 2-mesh (Tyler) screen and be retained on a 400-mesh (Tyler) screen.
- the molecular sieve can be extruded before drying, or, dried or partially dried and then extruded.
- the molecular sieve can be composited with other materials resistant to the temperatures and other conditions employed in organic conversion processes.
- matrix materials include active and inactive materials and synthetic or naturally occurring zeolites as well as inorganic materials such as clays, silica and metal oxides. Examples of such materials and the manner in which they can be used are disclosed in U.S. Patent Nos. 4,910,006 and 5,316,753.
- SSZ-85 is useful in catalysts for a variety of hydrocarbon conversion reactions such as hydrocracking, dewaxing, olefin isomerization, partial oxidation, and alkylation, transalkylation, or isomerization of aromatic compounds.
- SSZ-85 is also useful as an adsorbent for gas separations.
- SSZ-85 is represented by the following empirical formula: pQ:aF:(Co x Al y P z )0 2
- p is the number of moles of 1,3-diispropylimidazolium cation (Q) per mole of (Co x Al y P z )0 2 and p has a value of from 0.001 to 1 ; wherein a is the number of moles of fluoride ion (F) per mole of (Co x Al y P z )0 2 and a has a value of from 0 to 1, inclusive (0 ⁇ a ⁇ 1); wherein x, y, and z represent the mole fraction of Co, Al, and P, respectively, as tetrahedral units; and wherein x, y, and z are each a value greater than zero and less than one and the sum of x, y, and z is one.
- p has a value of from 0.001 to 0.5, from 0.001 to 0.4, from 0.001 to 0.3, or from 0.001 to 0.2.
- a has a value of from 0.1 to 0.8, or from 0.2 to 0.6.
- x is from 0.01 to 0.5, y is from 0.25 to 0.7, and z is from 0.25 to 0.7. In another embodiment, x is from 0.01 to 0.25, y is from 0.4 to 0.6, and z is from 0.4 to 0.6.
- Molecular sieves made by the process described herein are characterized by their XRD pattern.
- the XRD pattern lines of Table 2 are representative of as-synthesized SSZ-85.
- Minor variations in the diffraction pattern can result from variations in the mole ratios of the framework species of the particular sample due to changes in the lattice constants.
- sufficiently small crystals will affect the shape and intensity of peaks, leading to significant peak broadening. Minor variations can also result from variations in the organic compound used in the preparation. Calcination can also cause minor shifts in the XRD pattern. Notwithstanding these minor perturbations, the basic crystal lattice remains unchanged.
- W weak (> 0 to ⁇ 20);
- the XRD pattern including the lines listed in Table 3 are representative of calcined SSZ-85.
- the SSZ-85 molecular sieve is useful as catalyst in a wide range of hydrocarbon conversion processes.
- Hydrocarbon conversion reactions are chemical and catalytic processes in which carbon-containing compounds are changed to different carbon- containing compounds.
- Specific examples of hydrocarbon conversion processes which are effectively catalyzed by SSZ-85, by itself or in combination with one or more other catalytically active substances including other crystalline catalysts, include hydrocracking, dewaxing, catalytic cracking, aromatics formation, isomerization, alkylation and
- the SSZ-85 catalysts can have high selectivity, and under hydrocarbon conversion conditions can provide a high percentage of desired products relative to total products.
- the molecular sieve is converted to its hydrogen form by ammonium exchange followed by calcination.
- the molecular sieve is converted to its hydrogen form by ammonium exchange followed by calcination.
- at least 80% of the cation sites are occupied by hydrogen ions and/or rare earth ions.
- "predominantly in the hydrogen form” means that, after calcination, at least 80% of the cation sites are occupied by hydrogen ions and/or rare earth ions.
- SSZ-85 molecular sieves can be used in processing hydrocarbonaceous feedstocks.
- Hydrocarbonaceous feedstocks contain carbon compounds and can be from many different sources, such as virgin petroleum fractions, recycle petroleum fractions, shale oil, liquefied coal, tar sand oil, synthetic paraffins from NAO, recycled plastic feedstocks.
- Other feeds include synthetic feeds, such as those derived from a Fischer-Tropsch process, including an oxygenate-containing Fischer-Tropsch process boiling below about 371°C (700°F).
- the feed can be any carbon-containing feedstock susceptible to zeolitic catalytic reactions.
- the feed can contain metal or be free of metals. It can also have high or low nitrogen or sulfur impurities. It can be appreciated, however, that in general processing will be more efficient (and the catalyst more active) the lower the metal, nitrogen, and sulfur content of the feedstock.
- the conversion of hydrocarbonaceous feeds can take place in any convenient mode, for example, in fluidized bed, moving bed, or fixed bed reactors depending on the types of process desired.
- the formulation of the catalyst particles will vary depending on the conversion process and method of operation
- xGauge pressure i.e., the absolute pressure minus the ambient pressure
- the hydrocracking catalysts contain an effective amount of at least one hydrogenation component of the type commonly employed in hydrocracking catalysts.
- the hydrogenation component is generally selected from the group of hydrogenation catalysts consisting of one or more metals of Groups 6 and 8 to 10 of the Periodic Table, including the salts, complexes and solutions containing such.
- the hydrogenation catalyst can be selected from the group of metals, salts and complexes thereof of the group consisting of at least one of platinum, palladium, rhodium, iridium, ruthenium, and mixtures thereof or the group consisting of at least one of nickel, molybdenum, cobalt, tungsten, titanium, chromium, and mixtures thereof.
- the hydrogenation catalyst is present in an effective amount to provide the hydrogenation function of the hydrocracking catalyst, for example in the range of from 0.05 to 25% by weight.
- SSZ-85 for example predominantly in the hydrogen form, can be used to dewax hydrocarbonaceous feeds by selectively removing straight chain paraffins.
- the viscosity index of the dewaxed product is improved (compared to the waxy feed) when the waxy feed is contacted with SSZ-85 under isomerization dewaxing conditions.
- the catalytic dewaxing conditions are dependent in large measure on the feed used and upon the desired pour point.
- Hydrogen is typically present in the reaction zone during the catalytic dewaxing process.
- the hydrogen to feed ratio is typically between 500 and 30,000 SCF/bbl (standard cubic feet per barrel) (0.089 to 5.34 SCM/L (standard cubic meters/liter)), for example 1000 to 20,000 SCF/bbl (0.178 to 3.56 SCM L).
- SCF/bbl standard cubic feet per barrel
- SCM/L standard cubic meters/liter
- Typical feedstocks include light gas oil, heavy gas oils and reduced crudes boiling above about 350°F (177°C).
- a typical dewaxing process is the catalytic dewaxing of a hydrocarbon oil feedstock boiling above about 350°F (177°C) and containing straight chain and slightly branched chain hydrocarbons by contacting the hydrocarbon oil feedstock in the presence of added hydrogen gas at a hydrogen pressure of 15 psi to 3000 psi (0.10 MPa to 20.7 MPa) with a catalyst comprising SSZ-85 and at least one Group 8 to 10 metal.
- the SSZ-85 hydrodewaxing catalyst can optionally contain a hydrogenation component of the type commonly employed in dewaxing catalysts. See the aforementioned U.S. Patent Nos. 4,910,006 and 5,316,753 for examples of these hydrogenation components.
- the hydrogenation component is present in an effective amount to provide an effective hydrodewaxing and hydroisomerization catalyst for example in the range of from 0.05 to 5% by weight.
- the catalyst can be run in such a mode to increase isomerization dewaxing at the expense of cracking reactions.
- the feed can be hydrocracked, followed by dewaxing. This type of two stage process and typical hydrocracking conditions are described in U.S. Patent No. 4,921,594.
- SSZ-85 can also be utilized as a dewaxing catalyst in the form of a combination of catalysts.
- the combination comprises a first catalyst comprising molecular sieve SSZ-85 and, desirably, at least one metal selected from Groups 8 to 10 of the Periodic Table, and a second catalyst comprising an aluminosilicate zeolite which is more shape selective than molecular sieve SSZ-85.
- the term "combination" includes mixtures of the SSZ-85 molecular sieve and the aluminosilicate zeolite, layers of the molecular sieve and zeolite, or any other configuration in which the feed comes in contact with both the molecular sieve and the zeolite.
- the use of combined catalysts in the form of layers is disclosed in U.S. Patent No. 5, 149,421.
- the layering can also include a bed of SSZ- 85 layered with a non-zeolitic component designed for either hydrocracking or
- SSZ-85 can also be used to dewax raffinates, including bright stock, under conditions such as those disclosed in U. S. Patent No. 4,181,598.
- hydrofinishing It is often desirable to use mild hydrogenation (sometimes referred to as hydrofinishing) to produce more stable dewaxed products.
- the hydrofinishing step can be performed either before or after the dewaxing step, typically after.
- Hydrofinishing is typically conducted at a temperature ranging from 190°C to 340°C, at a pressure of from 400 psig to 3000 psig (2.76 MPa to 20.7 MPa), at a space velocity (LHSV) of from 0.1 IT 1 to 20 IT 1 and a hydrogen recycle rate of from 400 to 1500 SCF/bbl (0.071 SCM/L to 0.27 SCM/L).
- the hydrogenation catalyst employed must be active enough not only to hydrogenate the olefins, di-olefins and color bodies which can be present, but also to reduce the aromatic content. Suitable hydrogenation catalysts are disclosed in U.S. Patent No. 4,921,594. The
- hydrofinishing step is beneficial in preparing an acceptably stable product (e.g., a lubricating oil) since dewaxed products prepared from hydrocracked stocks tend to be unstable to air and light and tend to form sludges spontaneously and quickly.
- an acceptably stable product e.g., a lubricating oil
- Lube oil can be prepared using SSZ-85.
- a C2 0 + lube oil can be made by isomerizing a C2 0 + olefin feed over a catalyst comprising SSZ-85 in the hydrogen form and at least one metal selected from Groups 8 to 10 of the Periodic Table.
- the lubricating oil can be made by hydrocracking in a hydrocracking zone a
- hydrocarbonaceous feedstock to obtain an effluent comprising a hydrocracked oil, and catalytically dewaxing the effluent at a temperature of at least about 400°F (204°C) and at a pressure of from 15 psig to 3000 psig (0.10 MPa to 20.7 MPa) in the presence of added hydrogen gas with a catalyst comprising SSZ-85 in the hydrogen form and at least one metal selected from Groups 8 to 10 of the Periodic Table.
- SSZ-85 can be used to convert light straight run naphthas and similar mixtures to highly aromatic mixtures.
- normal and slightly branched chained hydrocarbons for example those having a boiling range above 40°C and less than 200°C, can be converted to products having a substantial higher octane aromatics content by contacting the hydrocarbon feed with a catalyst comprising SSZ-85. It is also possible to convert heavier feeds into BTX or naphthalene derivatives of value using a catalyst comprising SSZ-85.
- the conversion catalyst typically contains a Group 8 to 10 metal compound to have sufficient activity for commercial use.
- Group 8 to 10 metal compound as used herein is meant the metal itself or a compound thereof.
- the Group 8 to 10 noble metals and their compounds, platinum, palladium, and iridium, or combinations thereof can be used. Rhenium or tin or a mixture thereof can also be used in conjunction with the Group 8 to 10 metal compound (typically a noble metal compound), for example a platinum compound.
- the amount of Group 8 to 10 metal present in the conversion catalyst should be within the normal range of use in reforming catalysts, e.g., from 0.05 to 2.0 wt. %, or from 0.2 to 0.8 wt. %.
- the conversion catalyst be substantially free of acidity, for example, by neutralizing the molecular sieve with a basic metal, e.g., alkali metal, compound.
- a basic metal e.g., alkali metal
- Typical alkali metals are sodium, potassium, rubidium and cesium.
- the molecular sieve itself can be substantially free of acidity only at very high silica to alumina mole ratios.
- Hydrocarbon cracking stocks can be catalytically cracked in the absence of hydrogen using SSZ-85, for example predominantly in the hydrogen form.
- the catalyst can be employed in conjunction with traditional cracking catalysts, e.g., any aluminosilicate heretofore employed as a component in cracking catalysts.
- these are large pore, crystalline aluminosilicates.
- these traditional cracking catalysts are disclosed in the aforementioned U.S. Patent Nos. 4,910,006 and 5,316,753.
- TC traditional cracking catalyst
- the relative weight ratio of the TC to the SSZ-85 is generally between 1 : 10 and 500: 1 (e.g., between 1 : 10 and 200: 1, between 1 :2 and 50: 1, or between 1 : 1 and 20: 1).
- the novel molecular sieve and/or the traditional cracking component can be further ion exchanged with rare earth ions to modify selectivity.
- the cracking catalysts are typically employed with an inorganic oxide matrix component. See the aforementioned U.S. Patent Nos. 4,910,006 and 5,316,753 for examples of such matrix components.
- the present catalyst is highly active and highly selective for isomerizing C 4 to
- the activity means that the catalyst can operate at relatively low
- the catalyst can produce a high octane product.
- the high selectivity means that a relatively high liquid yield can be achieved when the catalyst is run at a high octane.
- the present process comprises contacting the isomerization catalyst, i.e., a catalyst comprising SSZ-85 in the hydrogen form, with a hydrocarbon feed under isomerization conditions.
- the feed is typically a light straight run fraction, boiling within the range of 30°F to 250°F (- 1°C to 121°C), e.g., from 60°F to 200°F (16°C to 93°C).
- the hydrocarbon feed for the process comprises a substantial amount of C 4 to C7 normal and slightly branched low octane hydrocarbons, for example C5 and Ce hydrocarbons.
- the isomerization reaction is typically carried out in the presence of hydrogen.
- Hydrogen can be added to give a hydrogen to hydrocarbon mole ratio (H2/HC) of from 0.5 to 10 H 2 /HC, e.g., from 1 to 8 H 2 /HC. See the aforementioned U.S. Patent Nos. 4,910,006 and 5,316,753 for a further discussion of isomerization process conditions.
- a low sulfur feed is especially useful in the present process.
- the feed desirably contains less than 10 ppm sulfur (e.g., less than 1 ppm sulfur or less than 0.1 ppm sulfur).
- acceptable levels can be reached by hydrogenating the feed in a presaturation zone with a hydrogenating catalyst which is resistant to sulfur poisoning. See the aforementioned U.S. Patent Nos. 4,910,006 and 5,316,753 for a further discussion of this hydrodesulfurization process.
- the catalyst can become deactivated by sulfur or coke. See the aforementioned U.S. Patent Nos. 4,910,006 and 5,316,753 for a further discussion of methods of removing this sulfur and coke, and of regenerating the catalyst.
- the conversion catalyst desirably contains a Group 8 to 10 metal compound to have sufficient activity for commercial use.
- the Group 8 to 10 noble metals and their compounds, platinum, palladium, and iridium, or combinations thereof can be used.
- the metal is platinum.
- the amount of Group 8 to 10 metal present in the conversion catalyst should be within the normal range of use in isomerizing catalysts, e.g., from 0.05 to 2.0 wt. %, or from 0.2 to 0.8 wt. %.
- SSZ-85 can be used in a process for the alkylation or transalkylation of an aromatic hydrocarbon.
- the process comprises contacting the aromatic hydrocarbon with a C2 to Ci6 olefin alkylating agent or a polyalkyl aromatic hydrocarbon transalkylating agent, under at least partial liquid phase conditions, and in the presence of a catalyst comprising SSZ-85.
- SSZ-85 can also be used for removing benzene from gasoline by alkylating the benzene as described above and removing the alkylated product from the gasoline.
- aromatic hydrocarbon feedstocks which can be alkylated or trans alkylated by the process described herein include aromatic compounds such as benzene, toluene and xylene. Benzene is especially useful. There can be occasions where naphthalene or naphthalene derivatives such as dimethylnaphthalene are desirable. Mixtures of aromatic hydrocarbons can also be employed.
- Suitable olefins for the alkylation of the aromatic hydrocarbon are those containing 2 to 20 carbon atoms (e.g., 2 to 4 carbon atoms, such as ethylene, propylene, 1- butene, trans-2-butene and cis-2-butene, or mixtures thereof). There can be instances where pentenes are desirable.
- Typical olefins are ethylene and propylene. Longer chain alpha olefins can be used as well.
- the transalkylating agent is a polyalkyl aromatic hydrocarbon containing two or more alkyl groups that each can have from 2 to 4 carbon atoms.
- suitable polyalkyl aromatic hydrocarbons include di-, tri- and tetra-alkyl aromatic hydrocarbons, such as diethylbenzene, triethylbenzene,
- diethylmethylbenzene diethyltoluene
- diisopropylbenzene diisopropyltoluene
- Typical polyalkyl aromatic hydrocarbons are the dialkyl benzenes.
- a particularly desirable polyalkyl aromatic hydrocarbon is diisopropylbenzene.
- reaction conditions are as follows.
- the aromatic hydrocarbon feed should be present in stoichiometric excess. It is typical that the molar ratio of aromatics to olefins be greater than four-to-one to prevent rapid catalyst fouling.
- the reaction temperature can range from 100°F to 600°F (38°C to 3 15°C), e.g., from 250°F to 450°F (121°C to 232°C).
- the reaction pressure should be sufficient to maintain at least a partial liquid phase in order to retard catalyst fouling. This is typically from 50 psig to 1000 psig (0.35 MPa to 6.89 MPa) depending on the feedstock and reaction temperature.
- Contact time can range from 10 seconds to 10 hours, but is usually from 5 minutes to an hour.
- the WHSV in terms of grams (pounds) of aromatic hydrocarbon and olefin per gram
- the molar ratio of aromatic hydrocarbon will generally range from 1 : 1 to 25: 1, e.g., from 2: 1 to 20: 1.
- the reaction temperature can range from 100°F to 600°F (38°C to 315°C), e.g., from 250°F to 450°F (121°C to 232°C).
- the reaction pressure should be sufficient to maintain at least a partial liquid phase, typically from 50 psig to 1000 psig (0.345 MPa to 6.89 MPa), e.g., from 300 psig to 600 psig (2.07 MPa to 4.14 MPa).
- the WHSV will range from 0.1 IT 1 to 10 If 1 .
- U.S. Patent No. 5,082,990 describes such processes.
- SSZ-85 can be used to convert light gas C2 to Ce paraffins to higher molecular weight hydrocarbons including aromatic compounds.
- the molecular sieve will contain a catalyst metal or metal oxide wherein the metal is selected from the group consisting of Groups 3, and 8 to 12 of the Periodic Table, e.g., gallium, niobium, indium or zinc, in the range of from 0.05 to 5 wt. %.
- SSZ-85 can be used to isomerize olefins.
- the feed stream is a hydrocarbon stream containing at least one C 4 to Ce olefin, e.g., a C 4 to Ce normal olefin such as normal butene.
- Normal butene as used in this specification means all forms of normal butene (e.g., 1 - butene, cis-2 -butene, and trans-2 -butene).
- hydrocarbons other than normal butene or other C 4 to Ce normal olefins will be present in the feed stream.
- These other hydrocarbons can include, e.g., alkanes, other olefins, aromatics, hydrogen, and inert gases.
- the feed stream typically can be the effluent from a fluid catalytic cracking unit or a methyl-tert-butyl ether unit.
- a fluid catalytic cracking unit effluent typically contains 40 to 60 wt. % normal butenes.
- a methyl-tert-butyl ether unit effluent typically contains 40 to 100 wt. % normal butene.
- the feed stream typically contains at least 40 wt. % normal butene, e.g., at least 65 wt. % normal butene.
- iso-olefin and methyl branched iso-olefin can be used interchangeably in this specification.
- the hydrocarbon feed is contacted in a vapor phase with a catalyst comprising the SSZ-85.
- the process can be carried out generally at a temperature of from 625°F to 950°F (329°C to 510°C), for butenes, e.g., of from 700°F to 900°F (371°C to 482°C) or from 350°F to 650°F (177°C to 343°C) for pentenes and hexenes.
- the pressure ranges from sub-atmospheric to 200 psig (1.38 MPa), e.g., from 15 psig to 200 psig (0.103 MPa to 1.38 MPa) or from 1 psig to 150 psig (0.007 MPa to 1.03 MPa).
- the liquid hourly space velocity during contacting is generally from 0.1 If 1 to 50 If 1 , based on the hydrocarbon feed, e.g., from 0.1 If 1 to 20 If 1 , from 0.2 If 1 to 10 If 1 , or from 1 If 1 to 5 If 1 .
- a hydrogen/hydrocarbon molar ratio is maintained from 0 to 30 or higher.
- the hydrogen can be added directly to the feed stream or directly to the isomerization zone.
- the reaction is typically substantially free of water, typically less than about 2 wt. % based on the feed.
- the process can be carried out in a packed bed reactor, a fixed bed, fluidized bed reactor, or a moving bed reactor.
- the bed of the catalyst can move upward or downward.
- the mole % conversion of, e.g., normal butene to iso-butene is at least 10 (e.g., at least 25, or at least 35).
- SSZ-85 can also be useful in a process for isomerizing one or more xylene isomers in a Cs aromatic feed to obtain ortho-, meta-, and para-xylene in a ratio approaching the equilibrium value.
- xylene isomerization is used in conjunction with a separate process to manufacture para-xylene.
- a portion of the para-xylene in a mixed Cs aromatics stream can be recovered by crystallization and centrifugation. The mother liquor from the crystallizer is then reacted under xylene isomerization conditions to restore ortho-, meta- and para-xylenes to a near equilibrium ratio.
- part of the ethylbenzene in the mother liquor is converted to xylenes or to products which are easily separated by filtration.
- the isomerate is blended with fresh feed and the combined stream is distilled to remove heavy and light by-products.
- the resultant Cs aromatics stream is then sent to the crystallizer to repeat the cycle.
- isomerization in the vapor phase is conducted in the presence of 3.0 to 30.0 mole of hydrogen per mole of alkylbenzene (e.g., ethylbenzene).
- the catalyst should comprise 0.1 to 2.0 wt. % of a hydrogenation/dehydrogenation component selected from Group 8 to 10 (of the Periodic Table) metal component, especially platinum or nickel.
- Group 8 to 10 metal component is meant the metals and their compounds such as oxides and sulfides.
- the isomerization feed can contain 10 to 90 wt. % of a diluent such as toluene, trimethylbenzene, naphthenes or paraffins.
- SSZ-85 can also be used to oligomerize straight and branched chain olefins having from 2 to 21 carbon atoms, e.g., from 2 to 5 carbon atoms.
- the oligomers which are the products of the process are medium to heavy olefins which are useful for both fuels, i.e., gasoline or a gasoline blending stock and chemicals.
- the oligomerization process comprises contacting the olefin feedstock in the gaseous or liquid phase with a catalyst comprising SSZ-85.
- the molecular sieve can have the original cations associated therewith replaced by a wide variety of other cations according to techniques well known in the art. Typical cations would include hydrogen, ammonium and metal cations including mixtures of the same. Of the replacing metallic cations, cations of metals such as rare earth metals, manganese, calcium, as well as metals of Group 12 of the Periodic Table (e.g., zinc) and Groups 8 to 10 of the Periodic Table (e.g., nickel) are particularly desirable.
- One of the prime requisites is that the molecular sieve has a fairly low aromatization activity, i.e., in which the amount of aromatics produced is not more than about 20% by weight. This is accomplished by using a molecular sieve with controlled acid activity (alpha value) of from 0.1 to 120, e.g., from 0.1 to 100, as measured by its ability to crack n-hexane.
- Alpha values are defined by a standard test known in the art, e.g., as shown in
- SSZ-85 can be used to condense lower aliphatic alcohols having 1 to 10 carbon atoms to a gasoline boiling point hydrocarbon product comprising mixed aliphatic and aromatic hydrocarbons.
- the process disclosed in U.S. Patent No. 3,894, 107 describes the process conditions used in this process.
- the catalyst can be in the hydrogen form or can be base-exchanged or impregnated to contain ammonium or a metal cation complement, typically in the range of from 0.05 to 5% by weight.
- the metal cations that can be present include any of the metals of the Groups 1 to 10 of the Periodic Table. However, in the case of Group 1 metals, the cation content should in no case be so large as to effectively inactivate the catalyst, nor should the exchange be such as to eliminate all acidity. There can be other processes involving treatment of oxygenated substrates where a basic catalyst is desired.
- Higher molecular weight hydrocarbons can be formed from lower molecular weight hydrocarbons by contacting the lower molecular weight hydrocarbon with a catalyst comprising SSZ-85 and a metal or metal compound capable of converting the lower molecular weight hydrocarbon to a higher molecular weight hydrocarbon.
- a catalyst comprising SSZ-85 and a metal or metal compound capable of converting the lower molecular weight hydrocarbon to a higher molecular weight hydrocarbon.
- Examples of such reactions include the conversion of methane to C 2+ hydrocarbons such as ethylene or benzene or both.
- useful metals and metal compounds include lanthanide and/or actinide metals or metal compounds.
- SSZ-85 can be used in a catalyst for the polymerization of 1-olefins, e.g., the polymerization of ethylene.
- the molecular sieve as hereinbefore described is reacted with a particular type of organometallic compound.
- Organometallic compounds useful in forming the polymerization catalyst include trivalent and tetravalent organotitanium and organochromium compounds having alkyl moieties and, optionally, halo moieties.
- alkyl includes both straight and branched chain alkyl, cycloalkyl and alkaryl groups such as benzyl.
- organometallic compounds used to form the polymerization catalyst include, but are not limited to, compounds corresponding to the general formula (2):
- M is a metal selected from titanium and chromium; R is alkyl; X is halogen (e.g., CI or Br); n is an integer from 1 to 4; and m is an integer greater than or equal to n and is 3 or 4.
- organotitanium and organochromium compounds encompassed by such a formula include compounds of the formula CrRj, CrR 3 , CrR 3 X, CrR 2 X, CrR 2 X2, CrRX 2 , CrRX 3 , T1R4, TiR 3 , TiR 3 X, TiR 2 X, TiR 2 X 2 , TiRX 2 , TiRX 3 , wherein X can be CI or Br and R can be methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec -butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, isohexyl, neohexyl, 2-ethybutyl, octyl, 2-ethylhexyl, 2,2- diethylbutyl, 2-isopropyl-3-methylbut
- organotitanium and organochromium materials employed in the catalyst can be prepared by techniques well known in the art. See, for example the aforementioned U. S. Patent Nos. 4,376,722; 4,377,497; 4,446,243; and 4,526,942.
- the organotitanium or organochromium compounds can be with the molecular sieve, such as by reacting the organometallic compound and the molecular sieve, in order to form the olefin polymerization catalyst. Generally, such a reaction takes place in the same reaction medium used to prepare the organometallic compound under conditions which promote formation of such a reaction product.
- the molecular sieve can simply be added to the reaction mixture after formation of the organometallic compound has been completed. Molecular sieve is added in an amount sufficient to provide from 0.1 to 10 parts by weight (e.g., from 0.5 to 5 parts by weight) of organometallic compound in the reaction medium per 100 parts by weight of molecular sieve.
- the temperature of the reaction medium during reaction of organometallic compound with molecular sieve is also maintained at a level which is low enough to ensure the stability of the organometallic reactant.
- temperatures in the range of from -150°C to 50°C e.g., from -80°C to 0°C, can be usefully employed.
- Reaction times of from 0.01 to 10 h or more e.g., from 0.1 to 1 h
- the catalyst material so formed can be recovered and dried by evaporating the reaction medium solvent under a nitrogen
- olefin polymerization reactions can be conducted in this same solvent-based reaction medium used to form the catalyst.
- the polymerization catalyst can be used to catalyze polymerization of 1- olefins.
- the polymers produced using the catalysts are normally solid polymers of at least one mono- 1 -olefin containing from 2 to 8 carbon atoms per molecule. These polymers are normally solid homopolymers of ethylene or copolymers of ethylene with another mono-1- olefin containing 3 to 8 carbon atoms per molecule. Exemplary copolymers include those of ethylene/propylene, ethylene/ 1-butene, ethylene/ 1-hexene, and ethylene/ 1-octene and the like.
- the major portion of such copolymers is derived from ethylene and generally consists of 80 to 99 mole % ethylene (e.g., 95 to 99 mole % ethylene). These polymers are well suited for extrusion, blow molding, injection molding and the like.
- the polymerization reaction can be conducted by contacting monomer or monomers, e.g., ethylene, alone or with one or more other olefins, and in the substantial absence of catalyst poisons such as moisture and air, with a catalytic amount of the supported organometallic catalyst at a temperature and at a pressure sufficient to initiate the
- an inert organic solvent can be used as a diluent and to facilitate materials handling if the polymerization reaction is conducted with the reactants in the liquid phase, e.g. in a particle form (slurry) or solution process.
- the reaction can also be conducted with reactants in the vapor phase, e.g., in a fluidized bed arrangement in the absence of a solvent but, if desired, in the presence of an inert gas such as nitrogen.
- the polymerization reaction is carried out at temperatures of from 30°C or less, up to 200°C or more, depending to a great extent on the operating pressure, the pressure of the olefin monomers, and the particular catalyst being used and its concentration.
- the selected operating temperature is also dependent upon the desired polymer melt index since temperature is definitely a factor in adjusting the molecular weight of the polymer.
- the temperature used is from 30°C to 100°C in a conventional slurry or "particle forming” process or from 100°C to 150°C in a “solution forming” process.
- a temperature of from 70°C to 1 10°C can be employed for fluidized bed processes.
- the pressure to be used in the polymerization reactions can be any pressure sufficient to initiate the polymerization of the monomer(s) to high molecular weight polymer.
- the pressure therefore, can range from sub-atmospheric pressures, using an inert gas as diluent, to super-atmospheric pressures of up to 3000 psig (20.68 MPa) or more, for example from atmospheric up to 1000 psig (6.89 MPa).
- a pressure of from 20 psig to 800 psig (0.14 MPa to 5.52 MPa) is desirable.
- an inert organic solvent medium to be employed in the solution or slurry process embodiments is not too critical, but the solvent should be inert to the supported organometallic catalyst and olefin polymer produced, and be stable at the reaction temperature used. It is not necessary, however, that the inert organic solvent medium also serves as a solvent for the polymer to be produced.
- saturated aliphatic hydrocarbons having from 3 to 12 carbon atoms per molecule such as pentane, hexane, heptane, isooctane, purified kerosene and the like
- saturated cycloaliphatic hydrocarbons having from 5 to 12 carbon atoms per molecule such as cyclohexane, cyclopentane, dimethylcyclopentane and methylcyclohexane and the like
- aromatic hydrocarbons having from 6 to 12 carbon atoms per molecule such as benzene, toluene, xylene, and the like.
- Particularly desirable solvent media are cyclohexane, pentane, hexane and heptane
- Hydrogen can be introduced into the polymerization reaction zone in order to decrease the molecular weight of the polymers produced (i.e., give a much higher melt index).
- the partial pressure of hydrogen when hydrogen is used can be within the range of from 5 psig to 100 psig (0.034 MPa to 0.69 MPa), e.g., from 25 psig to 75 psig (0.17 MPa to 0.52 MPa).
- the melt indices of the polymers produced can range from 0.1 to 70 or even higher.
- SSZ-85 is useful in a hydrotreating catalyst. During hydrotreatment, oxygen, sulfur and nitrogen present in the hydrocarbonaceous feed are reduced to low levels.
- the hydrotreating catalyst and hydrotreating conditions are selected to minimize cracking reactions, which can reduce the yield of the most desulfided product (typically useful as a fuel).
- Hydrotreating conditions typically include a reaction temperature of from 400°F to 900°F (204°C to 482°C), e.g., from 650°F to 850°F (343°C to 454°C); a pressure of from 500 psig and 5000 psig (3.45 MPa to 34.47 MPa), e.g., from 1000 psig to 3000 psig (6.89MPa to 20.68 MPa); a feed rate (LHSV) of 0.5 IT 1 to 20 IT 1 (v/v); and overall hydrogen consumption of from 300 SCF/bbl to 2000 SCF/bbl of liquid hydrocarbon feed (53.4 to 356 m 3 H2/m 3 feed).
- the hydrotreating catalyst will typically be a composite of a Group 6 metal or compound thereof, and a Group 8 to 10 metal or compound thereof supported on the molecular sieve. Typically, the hydrotreating catalyst is presulfided.
- Catalysts useful for hydrotreating hydrocarbon feeds are disclosed in U.S. Patent Nos. 4,347, 121 and 4,810,357.
- Suitable catalysts include noble metals from Group 8 to 10, such as Fe, Co, Ni, Pt or Pd, and/or Group 6 metals, such as Cr, Mo, Sn or W. Examples of combinations of Group 8 to 10 and Group 6 metals include Ni-Mo or Ni-Sn.
- Other suitable catalysts are described in U.S. Patent Nos. 3,852,207; 3,904,513; and 4, 157,294.
- the amount of hydrogenation component(s) in the catalyst suitably range from 0.5 to 10 wt.
- the hydrogenation component(s) in the catalyst can be in the oxide and/or sulfide form.
- SSZ-85 can be used in a catalyst to catalyze hydrogenation of a hydrocarbon feed containing unsaturated hydrocarbons.
- the unsaturated hydrocarbons can comprise olefins, dienes, polyenes, aromatic compounds and the like.
- Hydrogenation is accomplished by contacting the hydrocarbon feed containing unsaturated hydrocarbons with hydrogen in the presence of a catalyst comprising SSZ-85.
- the catalyst can also contain one or more metals of Group 6 and Group 8 to 10, including salts, complexes and solutions thereof. Reference to these catalytically active metals is intended to encompass such metals or metals in the elemental state or in some form such as an oxide, sulfide, halide, carboxylate and the like.
- metals examples include metals, salts or complexes wherein the metal is selected from the group consisting of platinum, palladium, rhodium, iridium, or combinations thereof, or the group consisting of nickel, molybdenum, cobalt, tungsten, titanium, chromium, vanadium, rhenium, manganese, and combinations thereof.
- the hydrogenation component of the catalyst i.e., the aforementioned metal
- Hydrogenation conditions such as temperature, pressure, space velocities, contact time and the like are well known in the art.
- SSZ-85 can be used for the catalytic reduction of the oxides of nitrogen in a gas stream.
- the gas stream also contains oxygen, often a stoichiometric excess thereof.
- the molecular sieve can contain one or more metals or metal ions within or on it which are capable of catalyzing the reduction of the nitrogen oxides. Examples of such metals or metal ions include cobalt, copper, platinum, iron, chromium, manganese, nickel, zinc, lanthanum, palladium, rhodium, and mixtures thereof.
- U.S. Patent No. 4,410,501 discloses a titanium-containing analogue of the all- silica ZSM-5 molecular sieve.
- This material (known as "TS-1") has been found to be useful in catalyzing a wide range of partial oxidation chemistries, for example the production of catechol and hydroquinone from phenol and hydrogen peroxide (3 ⁇ 4(3 ⁇ 4) and the manufacture of propylene oxide and cyclohexanone oxime from propylene and cyclohexanone, respectively.
- TS-1 can be used to catalyze the reaction of alkanes and aqueous H 2 0 2 to form alcohols and ketones. (See D.R.C. Huybrechts et al, Nature 1990, 345, 240- 242 and T. Tatsumi et al., J. Chem. Soc, Chem. Commun. 1990, 476-477).
- TS-1 has many salient features, other than its catalytic abilities, which make it attractive as a commercial catalyst. Most importantly, it is a solid. This allows for easy separation from the reactants and products (typically liquids) by simple, inexpensive filtration. Moreover, this solid has high thermal stability and a very long lifetime. Calcination in air at moderate temperatures (550°C) restores the material to its original catalytic ability. TS-1 performs best at mild temperatures ( ⁇ 100°C) and pressures (1 atm (0.10 MPa)).
- the oxidant used for reactions catalyzed by TS-1 is aqueous H2O2, which is important because aqueous H2O2 is relatively inexpensive and its by-product is water. Hence, the choice of oxidant is favorable from both a commercial and environmental point of view.
- SSZ-85 containing titanium oxide is useful as a catalyst in oxidation reactions, particularly in the oxidation of hydrocarbons. Examples of such reactions include, but are not limited to, the epoxidation of olefins, the oxidation of alkanes, and the oxidation of sulfur-containing, nitrogen-containing or phosphorus-containing compounds.
- the amount of Ti-SSZ-85 catalyst employed is not critical, but should be sufficient so as to substantially accomplish the desired oxidation reaction in a practicably short period of time (i.e., a catalytically effective amount).
- the optimum quantity of catalyst will depend upon a number of factors including reaction temperature, the reactivity and concentration of the substrate, hydrogen peroxide concentration, type and concentration of organic solvent, as well as the activity of the catalyst. Typically, however, the amount of catalyst will be from 0.001 to 10 grams per mole of substrate.
- the Ti-SSZ-85 is thermally treated (calcined) prior to use as a catalyst.
- the oxidizing agent employed in the oxidation processes disclosed herein is a hydrogen peroxide source such as hydrogen peroxide or a hydrogen peroxide precursor (i.e., a compound which under the oxidation reaction conditions is capable of generating or liberating hydrogen peroxide).
- a hydrogen peroxide source such as hydrogen peroxide or a hydrogen peroxide precursor (i.e., a compound which under the oxidation reaction conditions is capable of generating or liberating hydrogen peroxide).
- the amount of hydrogen peroxide relative to the amount of substrate is not critical, but must be sufficient to cause oxidation of at least some of the substrate.
- the molar ratio of hydrogen peroxide to substrate is from 100: 1 to 1 : 100, e.g., from 10: 1 to 1 : 10.
- additional hydrogen peroxide can be required.
- one equivalent of hydrogen peroxide is required to oxidize one equivalent of a mono-unsaturated substrate, but it can be desirable to employ an excess of one reactant to optimize selectivity to the epoxide.
- the use of a moderate to large excess (e.g., 50 to 200%) of olefin relative to hydrogen peroxide can be advantageous for certain substrates.
- a solvent can additionally be present during the oxidation reaction in order to dissolve the reactants other than the Ti-SSZ-85, to provide better temperature control, or to favorably influence the oxidation rates and selectivities.
- the solvent if present, can comprise from 1 to 99 wt. % of the total oxidation reaction mixture and is desirably selected such that it is a liquid at the oxidation reaction temperature.
- Organic compounds having boiling points at atmospheric pressure from 50°C to 150°C are generally desirable for use. Excess hydrocarbon can serve as a solvent or diluent.
- Suitable solvents include, but are not limited to, ketones (e.g., acetone, methyl ethyl ketone, acetophenone), ethers (e.g., tetrahydrofuran, butyl ether), nitriles (e.g., acetonitrile), aliphatic and aromatic hydrocarbons, halogenated hydrocarbons, and alcohols (e.g., methanol, ethanol, isopropyl alcohol, t-butyl alcohol, a-methyl benzyl alcohol, cyclohexanol). More than one type of solvent can be utilized. Water can also be employed as a solvent or diluent.
- ketones e.g., acetone, methyl ethyl ketone, acetophenone
- ethers e.g., tetrahydrofuran, butyl ether
- nitriles e.g., acetonitrile
- the reaction temperature is not critical, but should be sufficient to accomplish substantial conversion of the substrate within a reasonably short period of time. It is generally advantageous to carry out the reaction to achieve as high a hydrogen peroxide conversion as possible, typically at least about 50%, (e.g., at least 90% or 95%) consistent with reasonable selectivities.
- the optimum reaction temperature will be influenced by catalyst activity, substrate reactivity, reactant concentrations, and type of solvent employed, among other factors, but typically will be in a range of from 0°C to 150°C (e.g., from 25°C to 120°C). Reaction or residence times from 1 minute to 48 hours (e.g., from 10 minutes to 8 hours) will typically be appropriate, depending upon the above-identified variables.
- the reaction is typically performed at atmospheric or at elevated pressure, e.g., between 1 atm and 100 atm (0.10 MPa and 10.1 MPa), especially when the boiling point of the substrate is below the oxidation reaction temperature.
- reaction vessel it is desirable to pressurize the reaction vessel sufficiently to maintain the reaction components as a liquid phase mixture. Most (over 50%) of the substrate should desirably be present in the liquid phase.
- the oxidation process described herein can be carried out in a batch, continuous, or semi-continuous manner using any appropriate type of reaction vessel or apparatus such as a fixed bed, transport bed, fluidized bed, stirred slurry, or CSTR reactor.
- the reactants can be combined all at once or sequentially.
- the hydrogen peroxide or hydrogen peroxide precursor can be added incrementally to the reaction zone.
- the hydrogen peroxide could also be generated in situ within the same reactor zone where oxidation is taking place.
- the oxidized product can be separated and recovered from the reaction mixture using any appropriate technique such as fractional distillation, extractive distillation, liquid-liquid extraction, crystallization, or the like.
- the olefin substrate epoxidized in the process can be any organic compound having at least one ethylenically unsaturated functional group (i.e., a carbon- carbon double bond) and can be a cyclic, branched or straight-chain olefin.
- the olefin can contain aryl groups (e.g., phenyl, naphthyl).
- the olefin is aliphatic in character and contains from 2 to 20 carbon atoms.
- the use of light (low-boiling) C2 to C 10 mono-olefins is especially advantageous.
- More than one carbon-carbon double bond can be present in the olefin, i.e., dienes, trienes and other polyunsaturated substrates can be used.
- the double bond can be in a terminal or internal position in the olefin or can alternatively form part of a cyclic structure (as in cyclooctene, for example).
- Suitable substrates include unsaturated fatty acids or fatty acid derivatives such as esters.
- the olefin can contain substituents other than hydrocarbon substituents such as halide, carboxylic acid, ether, hydroxy, thiol, nitro, cyano, ketone, acyl, ester, anhydride, amino, and the like.
- Exemplary olefins suitable for use in the process described herein include ethylene, propylene, the butenes (i.e., 1-butene, cis-2-butene, trans-2-butene, isobutylene), butadiene, the pentenes, isoprene, 1-hexene, 3-hexene, 1-heptene, 1-octene, diisobutylene, 1- nonene, 1-tetradecene, camphene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1- pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene, the trimers and tetramers of propylene, cyclopentene, cyclohexene, cycloheptene, cycloo
- Olefins which are especially useful for epoxidation are the C2 to C2 0 olefins having the general structure (3):
- R 1 , R 2 , R 3 and R 4 are the same or different and are selected from the group consisting of hydrogen and Ci to C 18 alkyl.
- SSZ-85 can be used in a catalyst for acylating an aromatic substrate ArH n , where n is at least 1, by reacting the aromatic substrate with an acylating agent in the presence of the catalyst.
- the product of the acylation reaction is ArH( n _i ) COR where R is an organic radical.
- Examples of the aromatic substrate include, but are not limited to, benzene, toluene, anisole and 2-naphthol.
- the acylation reaction is conducted with a weight ratio of the catalyst to the acylating agent of from 0.03 to 0.5, a mole ratio of aromatic substrate to acylating agent of from 1.0 to 20, a reaction temperature of from 20°C to 200°C, a reaction pressure of from 1 atm to 5 atm (0.10 MPa to 0.51 MPa), and a reaction time of from 0.05 h to 20 h.
- a process for catalytic conversion of a feedstock comprising one or more oxygenates comprising alcohols and ethers to a hydrocarbon product containing light olefins, i.e., C 2 , C3 and/or C 4 olefins is also provided.
- the feedstock is contacted with the molecular sieve at effective process conditions to produce light olefins.
- oxygenate designates compounds such as alcohols, ethers and mixtures thereof.
- oxygenates include, but are not limited to, methanol and dimethyl ether.
- the process can be conducted in the presence of one or more diluents which can be present in the oxygenate feed in an amount between 1 and 99 mole %, based on the total number of moles of all feed and diluent components.
- Diluents include, but are not limited to, helium, argon, nitrogen, carbon monoxide, carbon dioxide, hydrogen, water, paraffins, hydrocarbons (such as methane and the like), aromatic compounds, or mixtures thereof.
- U. S. Patent Nos. 4,677,242 and 4,861,938 emphasize the use of a diluent to maintain catalyst selectivity toward the production of light olefins, particularly ethylene.
- the oxygenate conversion is desirably conducted in the vapor phase such that the oxygenate feedstock is contacted in a vapor phase in a reaction zone with the molecular sieve at effective process conditions to produce hydrocarbons, i.e., an effective temperature, pressure, WHSV and, optionally, an effective amount of diluent.
- the process is conducted for a period of time sufficient to produce the desired light olefins.
- the residence time employed to produce the desired product can vary from seconds to a number of hours. It will be readily appreciated that the residence time will be determined to a significant extent by the reaction temperature, the molecular sieve catalyst, the WHSV, the phase (liquid or vapor) and process design characteristics.
- the oxygenate feedstock flow rate affects olefin production. Increasing the feedstock flow rate increases WHSV and enhances the formation of olefin production relative to paraffin production. However, the enhanced olefin production relative to paraffin production is offset by a diminished conversion of oxygenate to hydrocarbons.
- the oxygenate conversion process is effectively carried out over a wide range of pressures, including autogenous pressures. At pressures between 0.01 atm and 1000 atm (0.001 to 101.3 MPa), the formation of light olefins will be affected although the optimum amount of product will not necessarily be formed at all pressures.
- a typical pressure is between 0.01 atm and 100 atm (0.001 MPa to 10.1 MPa), e.g., from 1 atm to 10 atm (0.10 MPa to 1.01 MPa).
- the pressures referred to herein are exclusive of the diluent, if any, that is present and refer to the partial pressure of the feedstock as it relates to oxygenate compounds.
- the temperature which can be employed in the oxygenate conversion process can vary over a wide range depending, at least in part, on the molecular sieve catalyst.
- the process can be conducted at an effective temperature between 200°C and 700°C.
- the formation of the desired light olefins can become low.
- the process may not form an optimum amount of light olefins and catalyst deactivation can be rapid.
- the molecular sieve catalyst can be incorporated into solid particles in which the catalyst is present in an amount effective to promote the desired conversion of oxygenates to light olefins.
- the solid particles comprise a catalytically effective amount of the catalyst and at least one matrix material selected from the group consisting of binder materials, filler materials and mixtures thereof to provide a desired property or properties, e.g., desired catalyst dilution, mechanical strength and the like to the solid particles.
- matrix materials are often, to some extent, porous in nature and may or may not be effective to promote the desired reaction.
- Filler and binder materials include, for example, synthetic and naturally occurring substances such as metal oxides, clays, silicas, aluminas, silica- aluminas, silica-magnesias, silica-zirconias, silica-thorias and the like. If matrix materials are included in the catalyst composition, the molecular sieve desirably comprises from 1 to 99 wt. % (e.g., from 5 to 90 wt. % or from 10 to 80 wt. %) of the total composition.
- the molecular sieve can be used to separate gases. For example, it can be used to separate carbon dioxide from natural gas. Typically, the molecular sieve is used as a component in a membrane that is used to separate the gases. Examples of such membranes are disclosed in U. S. Patent No. 6,508,860.
- the molecular sieve can be used in a catalyst to prepare methylamine or dimethylamine.
- Dimethylamine is generally prepared in industrial quantities by continuous reaction of methanol (and/or dimethyl ether) and ammonia in the presence of a silica-alumina catalyst.
- the reactants are typically combined in the vapor phase, at temperatures of from 300°C to 500°C, and at elevated pressures. Such a process is disclosed in U. S. Patent No. 4,737,592.
- the catalyst is used in its acid form.
- Acid forms of molecular sieves can be prepared by a variety of techniques.
- the molecular sieve used to prepare dimethylamine will be in the hydrogen form, or have an alkali or alkaline earth metal, such as Na, K, Rb, or Cs, ion-exchanged into it.
- the process involves reacting methanol, dimethyl ether or a mixture thereof and ammonia in amounts sufficient to provide a carbon/nitrogen (C/N) ratio of from 0.2 to 1.5, e.g., from 0.5 to 1.2.
- the reaction is conducted at a temperature of from 250°C to 450°C, e.g., from 300°C to 400°C.
- Reaction pressures can vary from 0.007 MPa to 7.0 MPa, e.g., from 0.07 MPa to 3.0 MPa.
- a methanol and/or dimethyl ether space time 0.01 h to 80 h (e.g., 0.10 h to 1.5 h) is typically used. This space time is calculated as the mass of catalyst divided by the mass flow rate of methanol/dimethyl ether introduced into the reactor.
- Adsorbent beds have been used to adsorb the hydrocarbons during the cold start portion of the engine. Although the process typically will be used with hydrocarbon fuels, the process can also be used to treat exhaust streams from alcohol-fueled engines.
- the adsorbent bed is typically placed immediately before the catalyst. Thus, the exhaust stream is first flowed through the adsorbent bed and then through the catalyst.
- the adsorbent bed preferentially adsorbs hydrocarbons over water under the conditions present in the exhaust stream. After a certain amount of time, the adsorbent bed has reached a temperature (typically about 150°C) at which the bed is no longer able to remove hydrocarbons from the exhaust stream. That is, hydrocarbons are actually desorbed from the adsorbent bed instead of being adsorbed. This regenerates the adsorbent bed so that it can adsorb hydrocarbons during a subsequent cold start.
- a temperature typically about 150°C
- the gas stream which is discharged from the oxidation catalyst is divided into a major and minor portion, the major portion being discharged directly into the atmosphere and the minor portion passing through the adsorbent bed whereby unburned hydrocarbon is desorbed and then flowing the resulting minor portion of this exhaust stream containing the desorbed unburned hydrocarbons into the engine where they are burned.
- U. S. Patent No. 5,078,979 discloses treating an exhaust gas stream from an engine to prevent cold start emissions using a molecular sieve adsorbent bed.
- the molecular sieve include faujasites, clinoptilolites, mordenites, chabazite, silicalite, zeolite Y, ultrastable zeolite Y, and ZSM-5.
- Canadian Patent No. 1,205,980 discloses a method of reducing exhaust emissions from an alcohol-fueled automotive vehicle. This method consists of directing the cool engine startup exhaust gas through a bed of zeolite particles and then over an oxidation catalyst and then the gas is discharged to the atmosphere. As the exhaust gas stream warms up it is continuously passed over the adsorption bed and then over the oxidation bed.
- the engine consists of any internal or external combustion engine which generates an exhaust gas stream containing noxious components or pollutants including unburned or thermally degraded hydrocarbons or similar organics. Other noxious components usually present in the exhaust gas include nitrogen oxides and carbon monoxide.
- the engine can be fueled by a hydrocarbonaceous fuel.
- hydrocarbonaceous fuel includes hydrocarbons, alcohols and mixtures thereof. Examples of hydrocarbons which can be used to fuel the engine are the mixtures of hydrocarbons which make up gasoline or diesel fuel.
- the alcohols which can be used to fuel engines include ethanol and methanol. Mixtures of alcohols and mixtures of alcohols and hydrocarbons can also be used.
- the engine can be a jet engine, gas turbine, internal combustion engine, such as an automobile, truck or bus engine, a diesel engine or the like.
- Pollutants will be used herein to collectively refer to any unburned fuel components and combustion byproducts found in the exhaust stream. For example, when the fuel is a hydrocarbon fuel, hydrocarbons, nitrogen oxides, carbon monoxide and other combustion by-products will be found in the engine exhaust gas stream.
- This engine exhaust stream is relatively cool, generally below 500°C and typically in the range of 200°C to 400°C.
- This engine exhaust stream has the above characteristics during the initial period of engine operation, typically for the first 30 to 120 seconds after startup of a cold engine.
- the engine exhaust stream will typically contain, by volume, 500 to 1000 ppm hydrocarbons.
- the engine exhaust gas stream which is to be treated is flowed over a molecular sieve bed comprising molecular sieve SSZ-85 to provide a first exhaust stream.
- molecular sieve SSZ-85 is described herein.
- the first exhaust stream which is discharged from the molecular sieve bed is now flowed over a catalyst to convert the pollutants contained in the first exhaust stream to innocuous components and provide a treated exhaust stream which is discharged into the atmosphere. It is understood that prior to discharge into the atmosphere, the treated exhaust stream can be flowed through a muffler or other sound reduction apparatus well known in the art.
- the engine exhaust gas stream which is to be treated is flowed over a combination of molecular sieves which preferentially adsorbs the hydrocarbons over water to provide a first exhaust stream, and flowing the first exhaust gas stream over a catalyst to convert any residual hydrocarbons and other pollutants contained in the first exhaust gas stream to innocuous products and provide a treated exhaust stream and discharging the treated exhaust stream into the atmosphere.
- the combination of molecular sieves includes molecular sieve SSZ-85 in combination with:
- a small pore crystalline molecular sieve or mixture of molecular sieves having pores no larger than 8-membered rings selected from the group consisting of SSZ-13, SSZ-16, SSZ-36, SSZ-39.
- 8 MR 8-membered rings
- a large pore crystalline molecular sieve having pores at least as large as 10- membered rings selected from the group consisting of SSZ-26, SSZ- 33, SSZ-64, zeolite Beta, CIT-1 , CIT-6 and ITQ-4 and having a mole ratio of at least 10 of (a) at least one oxide of at least one tetravalent element to (b) one or more oxides selected from the group consisting of oxides of trivalent elements, pentavalent elements, and mixtures thereof.
- oxides (l)(a) and (2)(a) are silicon oxide, and oxides (l)(b) and (2)(b) are independently selected from boron oxide, aluminum oxide, gallium oxide, indium oxide, magnesium oxide, iron oxide, cobalt oxide, zinc oxide, and mixtures thereof.
- molecular sieve (1) is SSZ-13, SSZ-39 or mixtures thereof and molecular sieve (2) is SSZ-26, SSZ-33, CIT-1, Beta, CIT-6 or mixture thereof.
- molecular sieve (1), molecular sieve (2) or both contain a metal selected from Cu, Ag, Au or mixtures thereof.
- the catalyst which is used to convert the pollutants to innocuous components is usually referred to in the art as a three-component control catalyst because it can simultaneously oxidize any residual hydrocarbons present in the first exhaust stream to carbon dioxide and water, oxidize any residual carbon monoxide to carbon dioxide and reduce any residual nitric oxide to nitrogen and oxygen.
- the catalyst may not be required to convert nitric oxide to nitrogen and oxygen, e.g., when an alcohol is used as the fuel. In this case the catalyst is called an oxidation catalyst.
- this catalyst does not function at a very high efficiency, thereby necessitating the molecular sieve b ⁇ dl.175]
- a sufficient temperature typically from 150°C to 200°C
- the pollutants which are adsorbed in the bed begin to desorb and are carried by the first exhaust stream over the catalyst.
- the catalyst has reached its operating temperature and is therefore capable of fully converting the pollutants to innocuous components.
- the adsorbent bed used herein can be conveniently employed in particulate form or the adsorbent can be deposited onto a solid monolithic carrier.
- the adsorbent can be formed into shapes such as pills, pellets, granules, rings, spheres, etc.
- the adsorbent in the employment of a monolithic form, it is usually most convenient to employ the adsorbent as a thin film or coating deposited on an inert carrier material which provides the structural support for the adsorbent.
- the inert carrier material can be any refractory material such as ceramic or metallic materials. It is desirable that the carrier material be unreactive with the adsorbent and not be degraded by the gas to which it is exposed.
- Ceramic materials examples include sillimanite, petalite, cordierite, mullite, zircon, zircon mullite, spondumene, alumina-titanate, etc.
- metallic materials which are within the scope include metals and alloys as disclosed in U.S. Patent No.
- the carrier material can best be utilized in any rigid unitary configuration which provides a plurality of pores or channels extending in the direction of gas flow.
- the configuration can be a honeycomb configuration.
- the honeycomb structure can be used advantageously in either unitary form, or as an arrangement of multiple modules.
- the honeycomb structure is usually oriented such that gas flow is generally in the same direction as the cells or channels of the honeycomb structure.
- the molecular sieve is deposited onto the carrier by any convenient way well known in the art.
- a desirable method involves preparing a slurry using the molecular sieve and coating the monolithic honeycomb carrier with the slurry.
- the slurry can be prepared by means known in the art such as combining the appropriate amount of the molecular sieve and a binder with water. This mixture is then blended by using means such as sonification, milling, etc.
- This slurry is used to coat a monolithic honeycomb by dipping the honeycomb into the slurry, removing the excess slurry by draining or blowing out the channels, and heating to about 100°C. If the desired loading of molecular sieve is not achieved, the above process can be repeated as many times as required to achieve the desired loading.
- the adsorbent can optionally contain one or more catalytic metals dispersed thereon.
- the metals which can be dispersed on the adsorbent are the noble metals which consist of platinum, palladium, rhodium, ruthenium, and mixtures thereof.
- the desired noble metal can be deposited onto the adsorbent, which acts as a support, in any suitable manner well known in the art.
- One example of a method of dispersing the noble metal onto the adsorbent support involves impregnating the adsorbent support with an aqueous solution of a decomposable compound of the desired noble metal or metals, drying the adsorbent which has the noble metal compound dispersed on it and then calcining in air at a temperature of from 400°C to 500°C for a time of from 1 to 4 h.
- decomposable compound is meant a compound which upon heating in air gives the metal or metal oxide. Examples of the decomposable compounds which can be used are set forth in U.S. Patent No. 4,791,091.
- decomposable compounds examples include chloroplatinic acid, rhodium trichloride, chloropalladic acid, hexachloroiridic acid and hexachlororuthenate. It is typical that the noble metal be present in an amount ranging from 0.01 to 4 wt. % of the adsorbent support.
- the range is from 0.1 to 4 wt. %, while in the case of rhodium and ruthenium the range is from 0.01 to 2 wt. %.
- catalytic metals are capable of oxidizing the hydrocarbon and carbon monoxide and reducing the nitric oxide components to innocuous products. Accordingly, the adsorbent bed can act both as an adsorbent and as a catalyst.
- the catalyst is selected from any three component control or oxidation catalyst well known in the art. Examples of catalysts are those described in U.S. Patent Nos.
- Desirable catalysts well known in the art are those that contain platinum and rhodium and optionally palladium, while oxidation catalysts usually do not contain rhodium.
- Oxidation catalysts usually contain platinum and/or palladium metal.
- These catalysts can also contain promoters and stabilizers such as barium, cerium, lanthanum, nickel, and iron.
- the noble metals promoters and stabilizers are usually deposited on a support such as alumina, silica, titania, zirconia, aluminosilicates, and mixtures thereof with alumina being desirable.
- the catalyst can be conveniently employed in particulate form or the catalytic composite can be deposited on a solid monolithic carrier with a monolithic carrier being desirable.
- the particulate form and monolithic form of the catalyst are prepared as described for the adsorbent above.
- the molecular sieve used in the adsorbent bed is SSZ-85.
- amides from oximes.
- the process relates to the use of SSZ-85 in the catalytic transformation of oximes, such as cyclohexanone oxime, to amides, such as epsilon-caprolactam (caprolactam), also known as Beckmann catalytic rearrangement.
- oximes such as cyclohexanone oxime
- amides such as epsilon-caprolactam (caprolactam)
- Beckmann catalytic rearrangement is shown below (where sulfuric acid is used instead of a molecular sieve catalyst):
- Amides, and in particular caprolactam are known in literature as important intermediates for chemical syntheses and as raw materials for the preparation of polyamide resins.
- Caprolactam is produced industrially by cyclohexanone oxime rearrangement in liquid phase using sulfuric acid or oleum as a catalyst. The rearranged product is neutralized with ammonia causing the joint formation of ammonium sulfate.
- This technology has numerous problems linked to the use of sulfuric acid, to the formation of high quantities of ammonium sulfate, with relative problems of disposal, corrosion of the equipment owing to the presence of acid vapors, etc.
- European Patent No. 234,088 describes a method for preparing caprolactam which comprises putting cyclohexanone oxime in gaseous state in contact with aluminosilicates of the zeolitic type such as ZSM-5, ZSM-11 or ZSM-23 having a constraint index of between 1 and 12, an atomic ratio Si/Al of at least 500 (S1O2/AI2O 3 mole ratio of at least 1000) and an external acid functionality of less than 5 ⁇ eq/g.
- aluminosilicates of the zeolitic type such as ZSM-5, ZSM-11 or ZSM-23 having a constraint index of between 1 and 12, an atomic ratio Si/Al of at least 500 (S1O2/AI2O 3 mole ratio of at least 1000) and an external acid functionality of less than 5 ⁇ eq/g.
- the present disclosure therefore relates to a process for the preparation of amides via the catalytic rearrangement of oximes which comprises putting an oxime in vapor phase in contact with a catalyst comprising a crystalline molecular sieve having a mole ratio of 10 or greater of (1) at least one oxide of at least one tetravalent element to (2) one or more oxides selected from the group consisting of oxides of trivalent elements, pentavalent elements, and mixtures thereof, and having, in its calcined form, having the XRD lines listed in Table 4.
- the molecular sieve can have a mole ratio of 10 or more of (1) silicon oxide to (2) an oxide selected from boron oxide, aluminum oxide, gallium oxide, indium oxide, and mixtures thereof.
- cyclohexanone oxime takes place at a pressure of from 0.05 bar to 10 bar (0.005 MPa and 1 MPa) and at a temperature of from 250°C to 500°C, e.g., from 300°C to 450°C. More specifically, the cyclohexanone oxime, in vapor phase, is fed to the reactor containing the catalyst in the presence of a solvent and optionally an incondensable gas. The cyclohexanone oxime is dissolved in the solvent and the mixture thus obtained is then vaporized and fed to the reactor.
- the solvent should be essentially inert to the oxime and the amide, as well as the catalyst.
- Useful solvents include, but are not limited to, lower boiling hydrocarbons, alcohols and ethers.
- Desirable solvents are of the type R 5 -0-R 6 wherein R 5 is a Ci to C 4 alkyl chain and R 6 can be a hydrogen atom or an alkyl chain containing a number of carbon atoms less than or equal to R 5 . These solvents can be used alone or mixed with each other or combined with an aromatic hydrocarbon such as benzene or toluene. Alcohols with a Ci to C 2 alkyl chain are particularly desirable.
- the cyclohexanone oxime is fed to the rearrangement reactor with a weight ratio with respect to the catalyst which is such as to give a WHSV, expressed as kg of cyclohexanone oxime/kg of catalyst/time, of between 0.1 If 1 and 50 If 1 , e.g., between 0.5 If 1 and 20 If 1 .
- the deterioration of the catalyst is due to the formation of organic residues which obstruct the pores of the catalyst and poison its active sites.
- the deterioration process is slow and depends on the operating conditions and in particular the space velocity, solvent, temperature, composition of the feeding.
- the catalytic activity however can be efficiently reintegrated by the combustion of the residues, by treatment in a stream of air and nitrogen at a temperature of between 450°C and 600°C.
- the carbon- based product might be coal, biomass or natural gas.
- F-T Fischer-Tropsch
- the carbon- based product might be coal, biomass or natural gas.
- These starting products are converted in a syngas generator to a synthesis gas, hereinafter referred to as "syngas” which contains carbon monoxide (CO) and hydrogen (H 2 ) gases.
- syngas is then converted in a Fischer- Tropsch reactor, typically in the presence of a Fischer-Tropsch catalyst which is frequently an iron- or cobalt-based catalyst and under suitable temperature and pressure conditions, into hydrocarbon products and other by-products.
- These hydrocarbon products are usually widely distributed in carbon chains of length (Ci to Cioo+).
- SSZ-85 can be used in a catalyst for converting synthesis gas to hydrocarbon products.
- the synthesis gas conversion catalyst can be any known Fischer-Tropsch synthesis catalyst. Such catalysts are typically based on Group 8 to 10 metals such as, iron, cobalt, nickel and ruthenium. Catalysts having low water gas shift activity and suitable for lower temperature reactions, such as cobalt, are preferred.
- the synthesis gas conversion catalyst can be supported on any suitable support, such as solid oxides, including but not limited to alumina, silica or titania or mixtures thereof. As non-limiting examples, the synthesis gas conversion catalyst can be present on the support in an amount between 5% and 50% by weight in the case of cobalt, and between 0.01 % and 1 % by weight in the case of ruthenium.
- reaction temperature is suitably from 160°C to 260°C (e.g., from 175°C to
- the total pressure is, for example, from 1 atm to 100 atm (0.10 MPa to 10.13 MPa), e.g., from 3 atm to 35 atm (0.30 MPa to 3.55 MPa), or from 5 atm to 20 atm (0.51 MPa to 2.02 MPa). Higher reaction pressures favor heavier products as they favor the synthesis reactions over the hydrocracking and isomerization reactions.
- the gaseous hourly space velocity based upon the total amount of feed is less than 20,000 volumes of gas per volume of catalyst per hour (e.g., from 100 to 5000 v/v/h, or from 1000 to 2500 v/v/h).
- SSZ-85 was prepared by combining in a Teflon cup 0.1 1 g of aluminum isopropoxide, with a solution of 0.20 g of concentrated phosphoric acid, 0.21 g of cobalt(II) acetate tetrahydrate, 2 g of 1,3-diisopropylimidazolium bromide, and finally 0.02 g of concentrated hydrofluoric acid.
- the resulting mixture was stirred into a paste then heated in a 23 mL Parr reactor at autogenous pressure for 3 days at 160°C with 43 rpm tumbling.
- Example 2 The product from Example 1 was calcined inside a muffle furnace under a flow of 2% oxygen/98% nitrogen heated to 595°C at a rate of l°C/min and held at 595°C for five hours, cooled and then analyzed by powder XRD.
- the resulting powder XRD pattern of the calcined product is shown in FIG. 2.
- the XRD pattern indicates that the material remains stable after calcination to remove the organic SDA.
- Calcined SSZ-85 of Example 2 was subjected to a surface area and micropore volume analysis using 2 as adsorbate and via the BET method.
- a t-plot analysis of nitrogen physisorption data of the calcined product of Example 2 indicated a micropore volume of 0.902 cm /g and an external BET surface area of 255.97 m 2 /g.
- Example 2 The calcined SSZ-85 of Example 2 was pelletized at 4-5 kpsi and crushed and meshed to 20-40. 0.50 g was packed into a 3 ⁇ 4 inch stainless steel tube with alundum on both sides of the zeolite bed. A Lindburg furnace was used to heat the reactor tube. Helium was introduced into the reactor tube at 10 mL/min and at atmospheric pressure. The reactor was heated to about 700°F (371°C) and a 50/50 (w/w) feed of n-hexane and 3-methylpentane was introduced into the reactor at a rate of 8 ⁇ / ⁇ . Feed delivery was made via a Brownlee pump. Direct sampling into a gas chromatograph began after 10 minutes of feed introduction.
- the Constraint Index value (not including 2-methylpentane) was calculated from the gas chromatographic data using methods known in the art, and was found to be between 0.33 and 0.35 for times on stream from 10 to 100 minutes. At 700°F (371°C) and 10 minutes on- stream, feed conversion was about 7%. After 100 minutes on stream, the conversion was about 5.5%.
- FIG. 3 shows the adsorption of n-hexane in SSZ-85 and various other molecular sieves.
- SSZ-85 was shown to have an adsorption capacity for n-hexane of about 0.05 mL/g after about 30 minutes of exposure to the n-hexane adsorbate and of about 0.055 mL/g after about 90 minutes of exposure to the adsorbate.
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Abstract
La présente invention concerne des utilisations pour un tamis moléculaire d'aluminophosphate de cobalt innovant désigné SSZ-85 préparé au moyen d'un liquide ionique d'1,3-diisopropylimidazolium.
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CN109395771A (zh) * | 2018-09-26 | 2019-03-01 | 昆明理工大学 | 一种酯化-皂化反应催化剂及其制备方法和应用 |
CN111099604A (zh) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Scm-26磷铝酸盐及其制备方法 |
CN116656421A (zh) * | 2023-05-16 | 2023-08-29 | 上海明诺环境科技有限公司 | 一种生物质热解制生物油的方法 |
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