WO2015043114A1 - 一种分子筛、其制造方法及其应用 - Google Patents
一种分子筛、其制造方法及其应用 Download PDFInfo
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- WO2015043114A1 WO2015043114A1 PCT/CN2014/000867 CN2014000867W WO2015043114A1 WO 2015043114 A1 WO2015043114 A1 WO 2015043114A1 CN 2014000867 W CN2014000867 W CN 2014000867W WO 2015043114 A1 WO2015043114 A1 WO 2015043114A1
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- WIPO (PCT)
- Prior art keywords
- molecular sieve
- oxide
- group
- ratio
- surface area
- Prior art date
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 379
- 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 379
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 60
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- 238000002425 crystallisation Methods 0.000 claims abstract description 34
- 230000008025 crystallization Effects 0.000 claims abstract description 34
- 238000001354 calcination Methods 0.000 claims abstract description 24
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- 229910052736 halogen Inorganic materials 0.000 claims abstract description 17
- 150000002367 halogens Chemical class 0.000 claims abstract description 17
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- 238000002441 X-ray diffraction Methods 0.000 claims description 81
- 239000003054 catalyst Substances 0.000 claims description 77
- 239000000203 mixture Substances 0.000 claims description 61
- 125000002950 monocyclic group Chemical group 0.000 claims description 58
- 239000013078 crystal Substances 0.000 claims description 48
- 239000011148 porous material Substances 0.000 claims description 47
- -1 saturated monocyclic compound Chemical class 0.000 claims description 47
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- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 claims description 8
- CIXSDMKDSYXUMJ-UHFFFAOYSA-N n,n-diethylcyclohexanamine Chemical compound CCN(CC)C1CCCCC1 CIXSDMKDSYXUMJ-UHFFFAOYSA-N 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
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- 150000002910 rare earth metals Chemical class 0.000 claims 1
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Images
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
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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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/24—After treatment, characterised by the effect to be obtained to stabilize the molecular sieve structure
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
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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
- Y02P20/584—Recycling of catalysts
Definitions
- the present invention relates to a molecular sieve, especially a SCM-1 molecular sieve or SCM-2 molecular sieve belonging to the MWW family.
- the invention also relates to a process for the manufacture of these molecular sieves and to their use as adsorbents or catalysts and the like.
- the MCM-22 molecular sieve belongs to the MWW topology and has two independent ten-membered ring tunnel systems: a set of two-dimensional sinusoidal channels with approximately elliptical cross-sections and apertures. Another set of ten-member ring channels contains dimensions of Approximate cylindrical twelve-element ring super cage, the super cage passes through a slightly twisted ten-membered ring window Connected with the outside world.
- the MCM-22 molecular sieve also has a bowl-shaped twelve-membered ring semi-super cage located on the outer surface of the crystal.
- MCM-22 molecular sieve The structure of MCM-22 molecular sieve was studied by high resolution electron microscopy and simultaneous X-ray powder diffraction. It was found that the MCM-22 molecular sieve raw powder (MCM-22(P)) without calcining to remove the template agent and the calcined MCM-22 molecular sieve ( MCM-22(C)) has significant structural differences.
- the unit cell parameters a(b) are the same, both are 1.427nm, and the unit cell parameter c of MCM-22(C) is At 2.52 nm, the unit cell parameter c of MCM-22(P) was 2.68 nm, and the unit cell parameter a(b) was unchanged, indicating that the layered structure of MCM-22(P) already existing did not change during the calcination.
- the mechanism for the conversion of MCM-22(P) to the MCM-22(C) by calcination is as follows: First, the interlayer templating agent desorbs and decomposes at high temperature, and at the same time forms silanol groups on the surface of the layer structure ( Si-OH) Finally, the surface Si-OH is dehydrated and condensed to form Si-O-Si bonds, and adjacent layer structures are joined to form a multilayer structure.
- MCM-22 molecular sieve The morphology of MCM-22 molecular sieve is generally in the form of flakes or pancakes, with a size of about 2 microns and a thickness of about ten to several tens of nm. It is found by observation of MCM-22 molecular sieve crystals by transmission electron microscopy. MCM-22 molecular sieve flake crystals have multiple layers. In the structure, the multilayer structure is formed by a "base layer structure" having a thickness of about 2.5 nm connected by an oxygen bridge. Because of the different thickness of the molecular sieve crystals, the multilayer structure has a different number of basic layer structures, but more than 5 layers, even more than 10 layers.
- MCM-22 molecular sieve Due to the multi-layer structure of the MCM-22 molecular sieve, the two sets of ten-membered ring channels are respectively located in the layer. There is a strict restriction on molecular diffusion between the interior of the structure and two adjacent base layer structures, while the twelve-membered ring semi-super cage on the surface of the crystal facilitates the diffusion of molecules.
- MCM-22 molecular sieves were used to catalyze the liquid phase alkylation of benzene with ethylene. This reaction was confirmed to occur only in a bowl-shaped semi-super cage located on the surface of the crystal, and the 10-membered ring channel in the interlayer and the layer. Little contribution to activity.
- the structure of the layered material has plasticity characteristics, such as the international patent application WO9717290.
- MCM-22(P) is swollen, and then the swollen MCM-22(P) is sonicated to destroy the interaction between the base layer structures and disperse the base layer structure, thereby obtaining a single base layer structure.
- single layer structure of the ITQ-2 molecular sieve.
- the ITQ-2 molecular sieve has been identified as a novel MWW topology molecular sieve.
- ITQ-2 molecular sieve has this special single-layer structure, its crystal thickness is only about 2.5nm. Compared with MCM-22 molecular sieve, ITQ-2 molecular sieve only retains the ten-membered ring channel located in the layer, and adjacent The 10-membered ring channel containing the cylindrical 12-membered ring super-cage between the layer structures is completely broken, and the super-cage is completely divided into two bowl-shaped semi-cage and is completely open.
- ITQ-2 The external specific surface area of the molecular sieve is greatly increased (generally about 700 m 2 /g, while the external specific surface area of the MCM-22 molecular sieve is only about 100 m 2 g -1 ), which has no limitation on molecular diffusion, and thus exhibits significantly better than MCM-22.
- the diffusion properties of molecular sieves are greatly increased (generally about 700 m 2 /g, while the external specific surface area of the MCM-22 molecular sieve is only about 100 m 2 g -1 ), which has no limitation on molecular diffusion, and thus exhibits significantly better than MCM-22.
- the ITQ-2 molecular sieve has only a single layer of MWW topology, the three-dimensional structure of the MWW material is broken, that is, the complete one cylindrical super cage becomes two bowl-shaped semi-super cages, resulting in the original cage.
- the B acid center becomes the L acid center ("IR study of the acidity of ITQ-2, an "all-surface” zeolitic system" Journal of Catalysis 214 (2003) 191-199), that is, the main acid center of the ITQ-2 molecular sieve is L acid, which is similar to the acid properties of mesoporous materials.
- the ITQ-2 molecular sieve has the specific surface area comparable to the mesoporous material, the ITQ-2 molecular sieve is more like a mesoporous material than a crystalline microporous molecular sieve material. Therefore, for the ITQ-2 molecular sieve, due to the destruction of its microporous structure, the ITQ-2 molecular sieve has the same diffusion and adsorption properties as the mesoporous material, and no longer has the thermal stability and water of the crystalline microporous molecular sieve. Characteristics such as thermal stability and shape-selective catalytic properties.
- the ITQ-2 molecular sieve can efficiently convert the reactants (ie, the reactant conversion ability is high) in the reaction of the acid center or the diffusion limit is serious, but the target product cannot be effectively realized.
- Selective generation ie, poor product selectivity.
- the reaction is a reaction catalyzed by a strong acid and a strong acid. Due to the weak acidity of the ITQ-2 molecular sieve, the ITQ-2 molecular sieve is not suitable for this reaction compared to the MCM-22 molecular sieve.
- the manufacturing process of the ITQ-2 molecular sieve is very complicated, and must include at least the steps of MCM-22 molecular sieve precursor production, MCM-22 molecular sieve precursor swelling and sonication to obtain the ITQ-2 molecular sieve, thereby manufacturing the method.
- MCM-22 molecular sieve precursor production MCM-22 molecular sieve precursor swelling and sonication to obtain the ITQ-2 molecular sieve, thereby manufacturing the method.
- the crystal structure of the molecular sieve is often severely damaged, resulting in the loss of a large amount of silicon into the liquid phase, resulting in a product yield of ITQ-2 molecular sieve is difficult to exceed 50%.
- a swelling agent such as cetyltrimethylammonium bromide (CTAB) is inevitably used.
- CTAB cetyltrimethylammonium bromide
- Such expanders have surface-active properties that cause silicon species in the liquid phase to assemble into mesoporous materials around their micelles, separate them from the liquid phase, and then mix them into the product ITQ-2 molecular sieve, thereby reducing the ITQ-2 molecular sieve. purity.
- the specific surface area of mesoporous materials is much higher than that of microporous molecular sieves, the inclusion of mesoporous materials as impurities can increase the total specific surface area and external specific surface area of the product.
- the pore walls of such mesoporous materials are amorphous, hydrothermal. Poor stability and poor acid and alkali resistance.
- the ITQ-2 molecular sieve is a single-layer structure and inevitably is mixed with the aforementioned mesoporous material, if it is regenerated by conventional means such as high-temperature calcination, the surface of the silicon hydroxy (Si-OH), aluminum hydroxy group Dehydration condensation occurs in (Al-OH), and then the framework structure of the molecular sieve is sintered and fused, the pores are covered and blocked, and the active center is lost, resulting in a significant decrease in catalytic performance and difficulty in returning to the level of fresh catalyst.
- the inventors have painstakingly studied on the basis of the prior art and found that by introducing a specific organic template combination into the molecular sieve manufacturing method, a novel molecular sieve (including SCM-) can be produced in a simple manner. 1 molecular sieve and SCM-2 molecular sieve, the same below), the molecular sieve shows at least equivalent reactant conversion ability compared with the prior art ITQ-2 molecular sieve even in the reaction limited by diffusion, and overcomes The aforementioned problems with the ITQ-2 molecular sieve.
- the invention relates to the following aspects:
- a molecular sieve characterized by having an exemplary chemical composition represented by the formula "first oxide ⁇ second oxide” or "first oxide ⁇ second oxide ⁇ organic template agent ⁇ water”
- the molar ratio of the first oxide to the second oxide is 20-2000, preferably 25-200
- the mass ratio of the organic templating agent to the first oxide is 0.03-0.38, preferably 0.07 -0.27
- the mass ratio of water to the first oxide is 0-0.15, preferably 0.02-0.11
- the first oxide is selected from at least one of silica and cerium oxide, preferably silica.
- the second oxide is selected from at least one of alumina, boron oxide, iron oxide, gallium oxide, titanium oxide, rare earth oxide, indium oxide, and vanadium oxide, preferably alumina, and the molecular sieve has substantially the following The X-ray diffraction pattern shown in the table,
- the total pore volume measured by the BET method is not less than 0.5 cm 3 /g, preferably 0.55 to 0.90 cm 3 /g, and the total specific surface area measured by the BET method is not Below 450 m 2 /g, preferably 480-680 m 2 /g, the external specific surface area measured by the BET method is not less than 185 m 2 /g, preferably 200-400 m 2 /g, and the external specific surface area accounts for The ratio of the specific surface area is not less than 40%, preferably 45 to 65%.
- the molecular sieve of any of the preceding aspects having a MWW topological framework structure, at least 80%, preferably at least 85%, more preferably at least 90%, more preferably at least 95%, more preferably at least 99% of the crystals are about 5 nm (measured by TEM) flake crystals.
- a method of making a molecular sieve comprising the steps of contacting a first oxide source, a second oxide source, an alkali source, an organic templating agent, an optional halogen source, and water under crystallization conditions to obtain a molecular sieve, And optionally, the step of calcining the obtained molecular sieve,
- organic templating agent is selected from the group consisting of a first organic templating agent and a second organic templating agent.
- the molar ratio of the first organic templating agent to the second organic templating agent is from 0.1 to 5.0, preferably from 0.3 to 3.5, more preferably from 0.4 to 1.5.
- the first organic templating agent is selected from the group consisting of azamonocyclic C 5-15 cycloalkanes (preferably C 6-10 cycloalkanes such as cyclohexane, cycloheptane, cyclooctane, cyclodecane and cyclodecane) At least one, preferably selected from the group consisting of monoaza, diaza or triaza monocyclic C 5-15 cycloalkanes (preferably C 6-10 cycloalkanes such as cyclohexane, cycloheptane, cyclooctane, ring) At least one of decane and cyclodecane, more preferably selected from the group consisting of n skeletons And m a saturated monocyclic compound (wherein each of R 1 and R 2 is independently selected from hydrogen, C 1-4 straight or branched alkyl and C 2-4 straight or branched alkenyl, preferably each independently It is selected from the group consisting
- the second organic templating agent is at least one selected from the group consisting of an azaaromatic hydrocarbon and a compound represented by the following formula (I).
- R 4 , R 5 and R 6 are each independently selected from hydrogen, C 1-12 straight or branched alkyl, C 2-12 straight or branched alkenyl, C 5-12 a cyclocycloalkyl group and a C 5-12 monocyclic cycloalkenyl group, provided that (1) at most one of R 4 , R 5 and R 6 is hydrogen, and (2) at least one of R 4 , R 5 and R 6 One (preferably at least two) is selected from the group consisting of the C 5-12 monocyclic cycloalkyl group and the C 5-12 monocyclic cycloalkenyl group, more preferably at least one of R 4 , R 5 and R 6 (preferably at least Two) selected from the C 5-12 monocyclic cycloalkyl group,
- the compound represented by the formula (I) is more preferably selected from the group consisting of N,N-diethylcyclohexylamine (C/N ratio of 10), dicyclohexylamine (C/N ratio of 12) and N-methyl group. At least one of dicyclohexylamine (C/N ratio of 13),
- the aza-aromatic hydrocarbon is selected from at least one of aza C 6-20 aromatic hydrocarbons (preferably C 6-14 aromatic hydrocarbons, especially benzene, naphthalene, anthracene and phenanthrene), optionally in each of its ring skeletons Further on the nitrogen atom, one further is selected from a C 1-12 straight or branched alkyl group, a C 2-12 straight or branched alkenyl group, a C 5-12 monocyclic cycloalkyl group, C 5-12 a substituent of a monocyclic cycloalkenyl group and a C 6-20 aryl group, preferably selected from a nitrogen aza, a diaza or a triaza C 6-20 aromatic hydrocarbon (preferably a C 6-14 aromatic hydrocarbon) At least one of benzene, naphthalene, anthracene and phenanthrene, more preferably selected from the group consisting of quinoline (C/N ratio of 9), N-phenylquino
- the aza monocyclic cycloalkane has a C/N ratio of more than 2, more preferably 2.5 or more, of the compound of the formula (I).
- the C/N ratio is 10 or higher, 12 or higher, or 13 or higher, and the aza aroma has a C/N ratio of 9 or higher, 10 or higher, or 11 or higher.
- the first oxide source in terms of the first oxide
- the second oxide source in the second oxide
- the molar ratio of the alkali source, the organic template, the halogen source and water is 1: (0.0005-0.05): (0.01-0.3): (0.05-1.4): (0-0.5) : (5-100), preferably 1: (0.005-0.04): (0.05-0.2): (0.2-1.0): (0-0.3): (10-40)
- the crystallization conditions include: crystallization temperature It is 140-180 ° C, preferably 145-170 ° C
- the crystallization time is 1-6 days, preferably 2-5 days
- the baking conditions include: baking temperature is 300-800 ° C, preferably 400-650 ° C, baking time It is 1-10 hours, preferably 3-6 hours.
- a molecular sieve composition comprising the molecular sieve of any of the preceding aspects or the molecular sieve produced by the method of producing a molecular sieve according to any of the preceding aspects, and a binder.
- the molecular sieve according to any of the preceding aspects wherein the manufacturing aspect according to any of the preceding aspects
- the molecular sieve produced by the method of the sub-screen or the molecular sieve composition of any of the foregoing aspects is used as an adsorbent, an alkylation catalyst, an olefin hydration catalyst, an olefin oxidation catalyst, a hydrocracking catalyst or an olefin isomerization catalyst.
- XRD X-ray diffraction spectrum
- SCM-1 molecular sieve manufactured in Example I-1 an SCM-1 molecular sieve manufactured in Comparative Example I-1.
- Figure 1 the XRD spectrum of the SCM-1 molecular sieve is compared to the MCM-22 molecular sieve at d-spacing. Apparent diffraction peaks appear at d-spacing with No diffraction peaks, at d-spacing The diffraction peaks overlap.
- FIG. 2 is an X-ray diffraction spectrum (XRD) of the SCM-2 molecular sieve manufactured in Example II-1 and the MCM-22 molecular sieve manufactured in Comparative Example II-1.
- XRD X-ray diffraction spectrum
- Figure 2 the XRD spectrum of the SCM-2 molecular sieve is compared to the MCM-22 molecular sieve at d-spacing. with Apparent diffraction peaks appear at d-spacing with There are no diffraction peaks.
- Figure 3a is a TEM photograph of a cross section of the SCM-1 molecular sieve crystal produced in Example I-1, by selecting the face having the smallest size of the plate crystal to visually display the thickness of the plate crystal;
- Figure 3b is a comparative example I-1.
- a TEM photograph of the crystal section of the MCM-22 molecular sieve is obtained by visually selecting the thickness of the sheet crystal by selecting the face having the smallest size of the plate crystal.
- the SCM-1 molecular sieve in Figure 3a has two typical MWW structural base layer structures with a thickness of only about 5 nm.
- the MCM-22 molecular sieve in Figure 3b is a multi-layered structure with more than 5 layers and a thickness of about 20 nm.
- the molecular sieve according to the present invention has a MWW topology but has a significantly different layer structure compared to MCM-22 molecular sieve or ITQ-2 molecular sieve, which is reflected by its unique XRD diffraction spectrum.
- the molecular sieve according to the present invention has a unique "double" base layer structure, while exposing as much as possible the twelve-membered ring semi-super cage of the MWW topology, while retaining the inter-layer containing the cylindrical twelve-membered ring supercage
- the ten-membered ring channel allows it to exhibit both high reactant conversion capacity (reactant conversion) and high product selectivity and good stability in the catalytic reaction. Qualitative.
- the molecular sieve according to the present invention exhibits at least comparable or even higher reactant conversion ability than the ITQ-2 molecular sieve even in reactions which are severely restricted by diffusion, such as the Beckmann rearrangement reaction of cyclohexanone oxime. .
- the skeleton structure is stable, the carbon deposition resistance is strong, and carbon deposition is less likely to occur in the catalytic reaction, thereby exhibiting a significantly extended service life compared with the ITQ-2 molecular sieve.
- the molecular sieve according to the present invention can be regenerated by high-temperature calcination after deactivation, and its catalytic performance can be easily restored to the same level as that of the fresh catalyst by the regeneration, thereby exhibiting good regenerability or recycling performance.
- the manufacturing process is simple and easy, the reaction raw materials are simple and easy to obtain, and the operation steps are small, the operating conditions are mild, and therefore energy consumption and material consumption are low, which is suitable for industrial application and implementation.
- the number of operation steps is small, and the material loss is small, whereby the yield of the molecular sieve product exceeds 80%, and sometimes it can reach 90% or even close to 100%.
- the crystallization system of the molecular sieve is simple, the crystallization condition is mild, and the crystallization history is simple and controllable, so that the target molecular sieve product having extremely high purity can be obtained without worrying about the influence of harmful impurities.
- the molecular sieve according to the present invention exhibits a platelet morphology having a uniform thickness (average thickness of about 5 nm) when observed by a transmission electron microscope (TEM), and the content of amorphous impurities is extremely low (preferably, 10% or less) , even less than 1%), showing extremely high crystal purity, which is beneficial to the full performance of its catalytic performance.
- TEM transmission electron microscope
- the ratio of the external specific surface area to the total specific surface area is not less than 40%, which is much higher than that of the MCM-22 molecular sieve (generally about 20%), thereby exhibiting a remarkable advantage over the MCM-22 molecular sieve.
- the molecular sieve according to the invention has good acid catalytic ability, especially in liquid phase alkylation reaction of benzene with ethylene, liquid phase alkylation reaction of benzene and propylene, exhibits excellent catalytic performance and has good industrial application prospect. .
- the molecular sieve according to the present invention has the advantages of low reaction temperature, high conversion rate, good selectivity, and stable operation when catalyzing the alkylation reaction of benzene.
- halogen refers to fluorine, chlorine, bromine or iodine.
- the C 1-4 linear or branched alkyl group for example, a methyl group, an ethyl group or a propyl group may be mentioned, and as a C 2-4 straight chain or branched olefin.
- the group include a vinyl group, an allyl group or a propenyl group.
- total specific surface area refers to the total area of a unit mass sample, including internal surface area and external surface area.
- Non-porous samples have only external surface areas, such as Portland cement, some clay mineral particles, etc.; porous and porous samples have external surface area and internal surface area, such as asbestos fibers, diatomaceous earth and molecular sieves.
- the surface area of pores having pore diameters less than 2 nm in porous and porous samples is the internal surface area, the surface area after deducting the internal surface area is referred to as the external surface area, and the external surface area per unit mass of sample is the external specific surface area.
- the pore volume also known as pore volume, refers to the volume of pores per unit mass of porous material.
- the total pore volume refers to the volume of all the pores (generally only the pores having a pore diameter of less than 50 nm) per unit mass of the molecular sieve.
- Microporous Volume refers to the volume of all micropores (generally referred to as pores having a pore diameter of less than 2 nm) per unit mass of molecular sieve.
- w, m, s, vs represent the intensity of the diffraction peak, w is weak, m is medium, s is strong, and vs is very strong, which is known to those skilled in the art.
- w is less than 20; m is 20-40; s is 40-70; vs is greater than 70.
- a SCM-1 molecular sieve there is directed to a SCM-1 molecular sieve.
- the SCM-1 molecular sieve has an illustrative chemical composition as shown by the formula "first oxide ⁇ second oxide". It is known that molecular sieves sometimes contain a certain amount of water (especially just after synthesis), but the present invention does not consider it necessary to specify the amount of moisture because the presence or absence of the moisture does not substantially The XRD spectrum of the molecular sieve is affected. In view of this, the schematic chemical composition actually represents the anhydrous chemical composition of the molecular sieve. Moreover, it is apparent that the schematic chemical composition represents the framework chemical composition of the SCM-1 molecular sieve.
- the molar ratio of the first oxide to the second oxide is generally from 20 to 2,000, preferably from 25 to 200.
- the first oxide is at least one selected from the group consisting of silica and ceria, of which silica is preferred.
- the second oxide is selected from the group consisting of alumina, boron oxide, iron oxide, gallium oxide, titanium oxide, rare earth oxide, indium oxide, and oxidation. At least one of vanadium, of which alumina is preferred.
- the SCM-1 molecular sieve has an X-ray diffraction pattern substantially as shown in the following table.
- the X-ray diffraction pattern of the SCM-1 molecular sieve it is preferable to further include an X-ray diffraction peak substantially as shown in the following table.
- the SCM-1 molecular sieve has a complete, novel crystalline structure distinct from many materials, particularly MCM-22 molecular sieves, as well as certain multilayer materials.
- the XRD spectrum of the SCM-1 molecular sieve is in the d-spacing nearby, Apparent diffraction peaks appear nearby, while at d-spacing nearby, nearby, nearby, nearby, nearby, nearby, Nearby and No diffraction peaks nearby, at d-spacing The diffraction peaks overlap.
- the total pore volume of the SCM-1 molecular sieve is generally not less than 0.5 cm 3 /g, preferably 0.55 to 0.90 cm 3 /g, wherein the micropore volume is generally not less than 0.06 cm 3 / gram, preferably 0.08-0.20 cm 3 /g.
- the total specific surface area of the SCM-1 molecular sieve is generally not less than 450 m 2 /g, preferably 480-680 m 2 /g.
- the external specific surface area of the SCM-1 molecular sieve is generally not lower than 185 m 2 /g, preferably 200 to 400 m 2 /g, and the ratio of the external specific surface area to the total specific surface area is generally Not less than 40%, preferably 45-65%.
- the SCM-1 molecular sieve has a MWW topological framework as shown in its XRD spectrum.
- At least 80%, preferably at least 85%, more preferably at least 90% of the total crystals of the SCM-1 molecular sieve are observed by transmission electron microscopy (TEM). More preferably, at least 95%, more preferably at least 99%, is a plate crystal having a thickness of about 5 nm (e.g., 5 ⁇ 0.8 nm), thereby exhibiting a nearly pure phase crystalline molecular sieve.
- TEM transmission electron microscopy
- the content of the amorphous impurities is very low, for example, the content of the amorphous impurities is generally 20% or less, preferably 15% or less, more preferably 10% or less, more preferably 5% or less, further It is preferably 1% or less.
- a SCM-2 molecular sieve there is directed to a SCM-2 molecular sieve.
- the SCM-2 molecular sieve has an illustrative chemical composition (ie, a skeleton chemical composition) as shown by the formula "first oxide ⁇ second oxide".
- the SCM-2 molecular sieve after its synthesis, further contains an organic templating agent and water in its composition (generally contained or filled in its pores). Therefore, the SCM-2 molecular sieve generally also has an illustrative chemical composition as shown by the formula "first oxide, second oxide, organic template, water”.
- the molar ratio of the first oxide to the second oxide is generally from 20 to 2,000, preferably from 25 to 200.
- the mass ratio of the organic templating agent to the first oxide is generally from 0.03 to 0.38, preferably from 0.07 to 0.27.
- the mass ratio of water to the first oxide in the SCM-2 molecular sieve is generally from 0 to 0.15, preferably from 0.02 to 0.11.
- the first oxide is at least one selected from the group consisting of silica and ceria, of which silica is preferred.
- the second oxide is selected from the group consisting of alumina, boron oxide, iron oxide, gallium oxide, titanium oxide, rare earth oxide, indium oxide, and oxidation. At least one of vanadium, of which alumina is preferred.
- the SCM-2 molecular sieve has an X-ray diffraction pattern substantially as shown in the following table.
- the SCM-2 molecular sieve has a complete, novel crystalline structure distinct from many materials, particularly MCM-22 molecular sieves, as well as certain multilayer materials.
- the XRD spectrum of the SCM-2 molecular sieve is in the d-spacing nearby, A distinct diffraction peak appears nearby, while at d-spacing nearby, nearby, nearby, nearby, nearby, nearby, Nearby and There are no diffraction peaks nearby.
- the total pore volume of the SCM-2 molecular sieve is generally not less than 0.5 cm 3 /g, preferably 0.55 to 0.90 cm 3 /g, wherein the micropore volume is generally not less than 0.06 cm 3 / gram, preferably 0.08-0.20 cm 3 /g.
- the total specific surface area of the SCM-2 molecular sieve is generally not less than 450 m 2 /g, preferably 480-680 m 2 /g.
- the external specific surface area of the SCM-2 molecular sieve is generally not lower than 185 m 2 /g, preferably 200-400 m 2 /g, and the ratio of the external specific surface area to the total specific surface area is generally Not less than 40%, preferably 45-65%.
- the organic template agent for example, The exemplified below when describing the method for producing the molecular sieve of the present invention are exemplified.
- the organic templating agent is typically a combination of a first organic templating agent and a second organic templating agent.
- the molar ratio of the first organic templating agent to the second organic templating agent is generally from 0.1 to 5.0, preferably from 0.3 to 3.5, more preferably from 0.4 to 1.5.
- the first organic templating agent is an azamonocyclic cycloalkane.
- aza monocyclic cycloalkane is used in the conventional definition in the field of organic chemistry, for example, a compound obtained by substituting a ring carbon atom of a monocyclic cycloalkane with a nitrogen atom, such as an azacyclohexane (piperider). Acridine) or 1,4-diazepane (homopiperazine).
- aza monocyclic cycloalkane for example, a nitrogen aza, a diaza or a triaza monocyclic cycloalkane can be mentioned.
- cycloalkane for example, a C 5-15 cycloalkane may be mentioned, among which a C 6-10 cycloalkane is preferable, and more specifically, such as cyclohexane, cycloheptane, cyclooctane, cyclodecane, cyclodecane, and the like.
- each of the carbon atoms constituting the ring skeleton of the azamonocyclic cycloalkane is further optionally further provided with a linear or branched alkyl group selected from a C 1-4 straight chain or a branched chain and a C 2-4 straight chain or a branched chain. a substituent of an alkenyl group.
- These azamonocyclic naphthenes may be used alone or in combination of any ones in any ratio.
- each of R 1 and R 2 is independently selected from hydrogen, C 1-4 straight or branched alkyl and C 2-4 straight or branched alkenyl, preferably each independently selected from hydrogen and methyl.
- R 3 is hydrogen.
- n is an integer of 4 to 12, preferably an integer of 5 to 8.
- m is an integer of 1 to 3, preferably 1 or 2.
- a carbon atom constituting a ring skeleton does not include any substituent (if any, such as the aforementioned R)
- the ratio of the total number of carbon atoms of 1 and R 2 ) to the total number of nitrogen atoms is generally greater than 2, preferably 2.5 or higher.
- the first organic templating agent more specifically, for example, hexamethyleneimine (C/N ratio of 6), piperidine (C/N ratio of 5), 2-methylpiperidone may be mentioned. Pyridine (C/N ratio of 5) and homopiperazine (C/N ratio of 2.5).
- the second organic templating agent is selected from the group consisting of azaaromatic hydrocarbons and the following formula (I) At least one of the compounds shown.
- R 4 , R 5 and R 6 are each independently selected from hydrogen, C 1-12 straight or branched alkyl, C 2-12 straight or branched alkenyl, C 5-12 monocyclic cycloalkyl and C 5-12 monocyclic cycloalkenyl.
- the C 1-12 linear or branched alkyl group for example, a C 1-10 linear or branched alkyl group, a C 1-6 linear or branched alkyl group or a C 1-4 straight chain or More specifically, a branched alkyl group may, for example, be a methyl group, an ethyl group, a propyl group or a butyl group.
- examples of the branched alkenyl group include a vinyl group, a propenyl group, an allyl group, and a butenyl group.
- examples of the C 5-12 monocyclic cycloalkyl group include a C 6-10 monocyclic cycloalkyl group or a C 6-8 monocyclic cycloalkyl group, and more specifically, for example, a cyclopentyl group or a cyclohexyl group.
- These monocyclic cycloalkyl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight a substituent of a chain or branched alkenyl group.
- Examples of the C 5-12 monocyclic cycloalkenyl group include a C 6-10 monocyclic cycloalkenyl group or a C 6-8 monocyclic cycloalkenyl group, and more specifically, for example, a cyclopentenyl group or a cyclopentane group. Dienyl, cyclohexenyl, cyclohexadienyl, cycloheptenyl, cycloheptatrienyl, cyclooctenyl, cyclooctadecenyl, cyclodecenyl and cyclodecenyl, and the like.
- These monocyclic cycloalkenyl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight a substituent of a chain or branched alkenyl group.
- the premise (1) is that at most one of R 4 , R 5 and R 6 is hydrogen, and the premise (2) is at least one of R 4 , R 5 and R 6 ( Preferably at least two) are selected from the group consisting of the C 5-12 monocyclic cycloalkyl group and the C 5-12 monocyclic cycloalkenyl group. More preferably, as the premise (2), at least one (preferably at least two) of R 4 , R 5 and R 6 is the C 5-12 monocyclic cycloalkyl group.
- the ratio of the total number of carbon atoms (excluding carbon atoms of any substituent (if any)) to the total number of nitrogen atoms is generally 10 or higher, 12 or higher, or 13 or higher, and the like.
- N,N-diethylcyclohexylamine (C/N ratio of 10) and dicyclohexylamine (C/N ratio of 12) can be mentioned.
- the compounds represented by the formula (I) may be used alone or in combination of any ones in any ratio.
- aza-aromatic hydrocarbon applies to conventional definitions in the field of organic chemistry, such as compounds obtained by substituting a carbon atom on the ring of an aromatic hydrocarbon with a nitrogen atom, such as, for example, azabenzene (pyridine) or Aza naphthalene (quinoline or isoquinoline).
- aza-aromatic hydrocarbon for example, a monoaza, a diaza or a triazaaromatic hydrocarbon can be mentioned.
- aromatic hydrocarbon for example, a C 6-20 aromatic hydrocarbon may be mentioned, and among them, a C 6-14 aromatic hydrocarbon, particularly benzene, naphthalene, anthracene, phenanthrene or the like is preferable.
- each carbon atom constituting the ring skeleton of these aza-aromatic hydrocarbons it is further optionally substituted with a C 1-4 linear or branched alkyl group and a C 2-4 linear or branched alkenyl group.
- Base hereinafter referred to as substituent A.
- each of the nitrogen atoms constituting the ring skeleton of these aza-aromatic hydrocarbons is further optionally further provided with (a) a C 1-12 linear or branched alkyl group, a C 2-12 straight chain or a branch.
- a substituent of an alkenyl group, a C 5-12 monocyclic cycloalkyl group, a C 5-12 monocyclic cycloalkenyl group, and a C 6-20 aryl group (referred to as a substituent B).
- a substituent B As the C 1-12 linear or branched alkyl group, for example, a C 1-10 linear or branched alkyl group, a C 1-6 linear or branched alkyl group or a C 1-4 straight chain or More specifically, a branched alkyl group may, for example, be a methyl group, an ethyl group, a propyl group or a butyl group.
- examples of the branched alkenyl group include a vinyl group, a propenyl group, an allyl group, and a butenyl group.
- examples of the C 5-12 monocyclic cycloalkyl group include a C 6-10 monocyclic cycloalkyl group or a C 6-8 monocyclic cycloalkyl group, and more specifically, for example, a cyclopentyl group or a cyclohexyl group.
- These monocyclic cycloalkyl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight A substituent of a chain or a branched alkenyl group (hereinafter referred to as a substituent A).
- Examples of the C 5-12 monocyclic cycloalkenyl group include a C 6-10 monocyclic cycloalkenyl group or a C 6-8 monocyclic cycloalkenyl group, and more specifically, for example, a cyclopentenyl group or a cyclopentane group. Dienyl, cyclohexenyl, cyclohexadienyl, cycloheptenyl, cycloheptatrienyl, cyclooctenyl, cyclooctadecenyl, cyclodecenyl and cyclodecenyl, and the like.
- These monocyclic cycloalkenyl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight A substituent of a chain or a branched alkenyl group (hereinafter referred to as a substituent A).
- the C 6-20 aryl group may, for example, be a C 6-14 aryl group or a C 6-10 aryl group, and more specifically, for example, a phenyl group, a naphthyl group, an anthracenyl group and a phenanthryl group may be mentioned.
- aryl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight chains or branches.
- a substituent of an alkenyl group hereinafter referred to as a substituent A).
- a carbon atom excluding any substituent A (if any) but including any substituent B (if any) carbon atoms
- the ratio of the total number to the total number of nitrogen atoms i.e., C/N ratio
- C/N ratio is generally 9 or higher, 10 or higher, or 11 or higher.
- aza-aromatic hydrocarbon examples include quinoline (C/N ratio of 9), N-phenylquinoline (C/N ratio of 15), and N-cyclohexylpyridine ( The C/N ratio is 11) and 6-methylquinoline (C/N ratio is 9) and the like.
- these azaaromatic hydrocarbons may be used singly or in combination of plural kinds in any ratio.
- the SCM-2 molecular sieve has a MWW topological framework structure as indicated by its XRD pattern.
- TEM transmission electron microscope
- the SCM-1 molecular sieve described in the foregoing first embodiment can be obtained by calcining the SCM-2 molecular sieve to remove any organic templating agent and water present in the pores thereof.
- the calcination may be carried out in any manner conventionally known in the art, such as a calcination temperature of usually 300 to 800 ° C, preferably 400 to 650 ° C, and a calcination time of usually 1 to 10 hours, preferably 3 to 6 hours.
- the calcination is generally carried out under an oxygen-containing atmosphere, such as an air or oxygen atmosphere.
- the SCM-1 molecular sieve or the SCM-2 molecular sieve in its composition (generally contained or filled in its pores), sometimes further contains an alkali metal and, depending on the starting materials used in its method of manufacture. / or a metal cation such as an alkaline earth metal cation as a constituent component.
- the content of the metal cation at this time, for example, the mass ratio of the metal cation to the first oxide is generally from 0 to 0.02, preferably from 0,0002 to 0.006, but is not limited thereto.
- the SCM-1 is dependent on the starting materials used in its method of manufacture.
- the molecular sieve or the SCM-2 molecular sieve sometimes further contains halogen as a constituent component in its composition (generally contained or filled in its pores).
- the content of the halogen at this time is, for example, such that the mass ratio of the halogen to the first oxide is generally from 0 to 0.15, preferably from 0 to 0.03, but is not limited thereto.
- the SCM-1 molecular sieve or the SCM-2 molecular sieve can be produced by the following production method.
- the present invention also relates to a method of producing a molecular sieve comprising the steps of contacting a first oxide source, a second oxide source, an alkali source, an organic templating agent, and water under crystallization conditions (hereinafter referred to as contact step).
- the contacting step may be carried out in any manner conventionally known in the art, such as exemplifying the first oxide source, the second oxide source, The alkali source, the organic templating agent and water are mixed, and the mixture is crystallized under the crystallization conditions.
- any oxide source conventionally used for this purpose in the art can be used.
- the first oxide source include silicic acid, silica gel, silica sol, potassium silicate, water glass, or tetraalkoxy silicon.
- the first oxide is cerium oxide
- examples of the first oxide source include tetraalkoxy cerium, cerium oxide, cerium nitrate, and the like. These first oxide sources may be used singly or in combination of a plurality of them in a desired ratio.
- any oxide source conventionally used for this purpose in the art may be used, including but not limited to the corresponding one of the second oxides.
- the second oxide is alumina
- examples of the second oxide source include aluminum hydroxide, sodium aluminate, aluminum salt, kaolin or montmorillonite.
- examples of the second oxide source include boric acid, borate, borax, and boron trioxide.
- examples of the second oxide source include iron nitrate, iron chloride, iron oxide, and the like.
- examples of the second oxide source include gallium nitrate, gallium sulfate, gallium oxide, and the like.
- examples of the second oxide source include titanium tetraalkoxide, titanium oxide, titanium nitrate, and the like.
- examples of the second oxide source include cerium oxide and cerium oxide.
- examples of the second oxide source include indium chloride, indium nitrate, indium oxide, and the like.
- examples of the second oxide source include vanadium chloride, ammonium metavanadate, sodium vanadate, vanadium dioxide, vanadyl sulfate, and the like. These second oxide sources may be used singly or in combination of a plurality of them in a desired ratio.
- any alkali source conventionally used for this purpose in the art may be used, including but not limited to an inorganic base which is a cation of an alkali metal or an alkaline earth metal, Especially sodium hydroxide and potassium hydroxide.
- alkali sources may be used alone or in combination of any ones in any ratio.
- the organic templating agent is a combination of a first organic templating agent and a second organic templating agent.
- the molar ratio of the first organic templating agent to the second organic templating agent is generally from 0.1 to 5.0, preferably from 0.3 to 3.5, more preferably from 0.4 to 1.5.
- the first organic templating agent is an azamonocyclic cycloalkane.
- aza monocyclic cycloalkane is used in the conventional definition in the field of organic chemistry, for example, a compound obtained by substituting a ring carbon atom of a monocyclic cycloalkane with a nitrogen atom, such as an azacyclohexane (piperider). Acridine) or 1,4-diazepane (homopiperazine).
- aza monocyclic cycloalkane for example, a nitrogen aza, a diaza or a triaza monocyclic cycloalkane can be mentioned.
- cycloalkane for example, a C 5-15 cycloalkane may be mentioned, among which a C 6-10 cycloalkane is preferable, and more specifically, such as cyclohexane, cycloheptane, cyclooctane, cyclodecane, cyclodecane, and the like.
- each of the carbon atoms constituting the ring skeleton of the azamonocyclic cycloalkane is further optionally further provided with a linear or branched alkyl group selected from a C 1-4 straight chain or a branched chain and a C 2-4 straight chain or a branched chain. a substituent of an alkenyl group.
- These azamonocyclic naphthenes may be used alone or in combination of any ones in any ratio.
- each of R 1 and R 2 is independently selected from hydrogen, C 1-4 straight or branched alkyl and C 2-4 straight or branched alkenyl, preferably each independently selected from hydrogen and methyl.
- R 3 is hydrogen.
- n is an integer of 4 to 12, preferably an integer of 5 to 8.
- m is an integer of 1 to 3, preferably 1 or 2.
- a carbon atom constituting a ring skeleton does not include any substituent (if any, such as the aforementioned R)
- the ratio of the total number of carbon atoms of 1 and R 2 ) to the total number of nitrogen atoms is generally greater than 2, preferably 2.5 or higher.
- the first organic templating agent more specifically, for example, hexamethyleneimine (C/N ratio of 6), piperidine (C/N ratio of 5), 2-methylpiperidone may be mentioned. Pyridine (C/N ratio of 5) and homopiperazine (C/N ratio of 2.5).
- the second organic templating agent is at least one selected from the group consisting of an azaaromatic hydrocarbon and a compound represented by the following formula (I).
- R 4 , R 5 and R 6 are each independently selected from hydrogen, C 1-12 straight or branched alkyl, C 2-12 straight or branched alkenyl, C 5-12 monocyclic cycloalkyl and C 5-12 monocyclic cycloalkenyl.
- the C 1-12 linear or branched alkyl group for example, a C 1-10 linear or branched alkyl group, a C 1-6 linear or branched alkyl group or a C 1-4 straight chain or More specifically, a branched alkyl group may, for example, be a methyl group, an ethyl group, a propyl group or a butyl group.
- examples of the branched alkenyl group include a vinyl group, a propenyl group, an allyl group, and a butenyl group.
- examples of the C 5-12 monocyclic cycloalkyl group include a C 6-10 monocyclic cycloalkyl group or a C 6-8 monocyclic cycloalkyl group, and more specifically, for example, a cyclopentyl group or a cyclohexyl group.
- These monocyclic cycloalkyl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1 - 4 straight or branched alkyl groups and C 2-4 straight a substituent of a chain or branched alkenyl group.
- Examples of the C 5-12 monocyclic cycloalkenyl group include a C 6-10 monocyclic cycloalkenyl group or a C 6-8 monocyclic cycloalkenyl group, and more specifically, for example, a cyclopentenyl group or a cyclopentane group. Dienyl, cyclohexenyl, cyclohexadienyl, cycloheptenyl, cycloheptatrienyl, cyclooctenyl, cyclooctadecenyl, cyclodecenyl and cyclodecenyl, and the like.
- These monocyclic cycloalkenyl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight a substituent of a chain or branched alkenyl group.
- the premise (1) is that at most one of R 4 , R 5 and R 6 is hydrogen, and the premise (2) is at least one of R 4 , R 5 and R 6 ( Preferably at least two) are selected from the group consisting of the C 5-12 monocyclic cycloalkyl group and the C 5-12 monocyclic cycloalkenyl group. More preferably, as the premise (2), at least one (preferably at least two) of R 4 , R 5 and R 6 is the C 5-12 monocyclic cycloalkyl group.
- the ratio of the total number of carbon atoms (excluding carbon atoms of any substituent (if any)) to the total number of nitrogen atoms is generally 10 or higher, 12 or higher, or 13 or higher, and the like.
- N,N-diethylcyclohexylamine (C/N ratio of 10) and dicyclohexylamine (C/N ratio of 12) can be mentioned.
- the compounds represented by the formula (I) may be used alone or in combination of any ones in any ratio.
- aza-aromatic hydrocarbon applies to conventional definitions in the field of organic chemistry, such as compounds obtained by substituting a carbon atom on the ring of an aromatic hydrocarbon with a nitrogen atom, such as, for example, azabenzene (pyridine) or Aza naphthalene (quinoline or isoquinoline).
- aza-aromatic hydrocarbon for example, a monoaza, a diaza or a triazaaromatic hydrocarbon can be mentioned.
- aromatic hydrocarbon for example, a C 6-20 aromatic hydrocarbon may be mentioned, and among them, a C 6-14 aromatic hydrocarbon, particularly benzene, naphthalene, anthracene, phenanthrene or the like is preferable.
- each carbon atom constituting the ring skeleton of these aza-aromatic hydrocarbons it is further optionally substituted with a C 1-4 linear or branched alkyl group and a C 2-4 linear or branched alkenyl group.
- Base hereinafter referred to as substituent A.
- each of the nitrogen atoms constituting the ring skeleton of these aza-aromatic hydrocarbons is further optionally further provided with (a) a C 1-12 linear or branched alkyl group, a C 2-12 straight chain or a branch.
- a substituent of an alkenyl group, a C 5-12 monocyclic cycloalkyl group, a C 5-12 monocyclic cycloalkenyl group, and a C 6-20 aryl group (referred to as a substituent B).
- a substituent B As the C 1-12 linear or branched alkyl group, for example, a C 1-10 linear or branched alkyl group, a C 1-6 linear or branched alkyl group or a C 1-4 straight chain or More specifically, a branched alkyl group may, for example, be a methyl group, an ethyl group, a propyl group or a butyl group.
- examples of the branched alkenyl group include a vinyl group, a propenyl group, an allyl group, and a butenyl group.
- examples of the C 5-12 monocyclic cycloalkyl group include a C 6-10 monocyclic cycloalkyl group or a C 6-8 monocyclic cycloalkyl group, and more specifically, for example, a cyclopentyl group or a cyclohexyl group.
- These monocyclic cycloalkyl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight A substituent of a chain or a branched alkenyl group (hereinafter referred to as a substituent A).
- Examples of the C 5-12 monocyclic cycloalkenyl group include a C 6-10 monocyclic cycloalkenyl group or a C 6-8 monocyclic cycloalkenyl group, and more specifically, for example, a cyclopentenyl group or a cyclopentane group. Dienyl, cyclohexenyl, cyclohexadienyl, cycloheptenyl, cycloheptatrienyl, cyclooctenyl, cyclooctadecenyl, cyclodecenyl and cyclodecenyl, and the like.
- These monocyclic cycloalkenyl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight A substituent of a chain or a branched alkenyl group (hereinafter referred to as a substituent A).
- a substituent A examples of the C 6-20 aryl group include a C 6-14 aryl group or a C 6-10 aryl group, and more specific examples thereof include a phenyl group, a naphthyl group, an anthracenyl group, and a phenanthryl group.
- aryl groups are also optionally further provided with one or more (such as 1 to 5, 1 to 3 or 1) selected from C 1-4 straight or branched alkyl groups and C 2-4 straight chains or branches.
- a substituent of an alkenyl group hereinafter referred to as a substituent A).
- a carbon atom excluding any substituent A (if any) but including any substituent B (if any) of carbon atoms
- the ratio of the total number to the total number of nitrogen atoms i.e., C/N ratio
- C/N ratio is generally 9 or higher, 10 or higher, or 11 or higher.
- aza-aromatic hydrocarbon examples include quinoline (C/N ratio of 9), N-phenylquinoline (C/N ratio of 15), and N-cyclohexylpyridine ( The C/N ratio is 11) and 6-methylquinoline (C/N ratio is 9) and the like.
- these azaaromatic hydrocarbons may be used singly or in combination of plural kinds in any ratio.
- a halogen source in the method of producing a molecular sieve, can be further introduced as needed, thereby introducing a halogen into the composition of the product molecular sieve.
- a halogen source for example, an inorganic halogen source such as hydrofluoric acid, sodium chloride, ammonium fluoride, potassium fluoride or the like, or an organic halogen source, such as a halogenated C 1-3 alkane such as dichloro, may be mentioned. Methane, chloroform, dichloroethane, methyl iodide, etc. These halogen sources may be used alone or in combination of a plurality of them in a desired ratio.
- the first oxide source in terms of the first oxide
- the second oxide source in terms of the second oxide
- the molar ratio of the alkali source, the organic template, the halogen source and water is generally 1: (0.0005-0.05): (0.01-0.3): (0.05-1.4): (0-0.5): ( 5-100), preferably 1: (0.005-0.04): (0.05-0.2): (0.2-1.0): (0-0.3): (10-40).
- the crystallization conditions include a crystallization temperature of 140 to 180 ° C, preferably 145 to 170 ° C, and a crystallization time of 1 to 6 days, preferably 2 to 5 days.
- the molecular sieve in the method of producing a molecular sieve, after the contacting step or the completion of the crystallization, the molecular sieve can be separated from the obtained reaction mixture by any conventionally known separation method (generally corresponding to the foregoing SCM-2 molecular sieves, sometimes referred to as molecular sieve precursors, are used as products.
- the separation method for example, a method of filtering, washing, and drying the obtained reaction mixture can be mentioned.
- the filtration, washing and drying may be carried out in any manner conventionally known in the art.
- the obtained reaction mixture can be simply suction filtered.
- the washing such as may be used include deionized water until the filtrate was washed with a pH of 7-9, preferably 8 - 9.
- the drying temperature is, for example, 40 to 250 ° C, preferably 60 to 150 ° C, and the drying time is, for example, 8 to 30 hours, preferably 10 to 20 hours.
- the drying can be carried out under normal pressure or under reduced pressure.
- the obtained SCM-2 molecular sieve may be calcined as needed to remove the organic templating agent and moisture or the like which may be present, thereby obtaining a calcined Molecular sieves, which generally correspond to the aforementioned SCM-1 molecular sieves.
- the firing may be performed in any conventional manner known in the art, such as the firing temperature is generally 300-800 deg.] C, preferably 400 - 650 °C, the calcination time is generally 1 - 10 hours, preferably 3-6 hours.
- the calcination is generally carried out under an oxygen-containing atmosphere, such as an air or oxygen atmosphere.
- the SCM-1 molecular sieve, the SCM-2 molecular sieve or any molecular sieve produced by the method for producing a molecular sieve according to the present invention may be optionally used.
- the ion exchange is carried out by any means conventionally known in the art, such as by ion exchange or solution impregnation (for example, see, for example, U.S. Patent Nos. 3,140,249 and 3,140,253, etc.), the metal cations (such as Na ions or The K ion, depending on its specific manufacturing method, is replaced in whole or in part by other cations.
- Examples of the other cation include hydrogen ions, other alkali metal ions (including K ions, Rb ions, etc.), ammonium ions (including NH 4 ions, quaternary ammonium ions such as tetramethylammonium ions and tetraethylammonium ions). Etc.), alkaline earth metal ions (including Mg ions, Ca ions), Mn ions, Zn ions, Cd ions, noble metal ions (including Pt ions, Pd ions, Rh ions, etc.), Ni ions, Co ions, Ti ions, Sn ions , Fe ions and/or rare earth metal ions, and the like.
- the molecular sieve according to the present invention may be treated by a dilute acid solution or the like as needed to increase the ratio of silicon to aluminum or treated with steam to improve the acid attack resistance of the molecular sieve crystal.
- the method for producing a molecular sieve follows the reaction principle of a conventional hydrothermal method for producing a molecular sieve, and thus has a smaller number of operation steps, a simple crystallization system, and a mild crystallization condition as compared with a manufacturing method of an ITQ-2 molecular sieve or the like.
- the crystallization process is simple and controllable, so the energy and material loss of the manufacturing method is small (the production cost is low), and the yield of the molecular sieve product can generally exceed 80%, sometimes even 90%, or close to 100%.
- the molecular sieve product obtained by the present invention also has the advantage of extremely low impurity content.
- the molecular sieve product such as SCM-1 molecular sieve or SCM-2 molecular sieve
- TEM transmission electron microscopy
- the content of the amorphous impurities is very low, for example, the content of the amorphous impurities is generally 20% or less, more preferably 15% or less, more preferably 10% or less, still more preferably 5% or less, further preferably 1 %the following.
- the inventors of the present invention believe that the molecular sieve of the present invention has a "double" base layer structure because its thickness is approximately the thickness of the "base layer structure" constituting the MCM-22 molecular sieve (2.5 nm). 2 times the left and right).
- the double base layer structure of the molecular sieve of the present invention is very unique, fully realizing the twelve-membered ring semi-super cage that exposes the MWW topology as much as possible, which has been desired in the art but has not been realized.
- the goal of retaining the ten-membered ring channel is a new structure that has not been obtained so far in the field.
- the present invention since a combined organic templating agent is used, different organic species are common (rather than a single species) inserted between the respective base layer structures of the molecular sieve, thereby resulting in the SCM-1 molecular sieve and the SCM-2 molecular sieve of the present invention.
- the prior art MCM-22 molecular sieves make a difference in microstructure. Further, when these molecular sieves are separately characterized by X-ray diffraction (XRD), as described above, the difference in microstructure is represented by XRD spectrum. The difference in diffraction peaks on the graph.
- the inventors of the present invention believe that the difference in these diffraction peaks (especially those related to the thickness of the stack of sheets or the thickness of the stack in the c-axis direction) directly reflects the molecular sieve and MCM of the present invention.
- -22 molecular sieve or ITQ-2 molecular sieve differs in layer structure.
- this difference in microstructure is further reflected as a significant difference in performance parameters such as specific surface area.
- the ratio of the outer specific surface area to the total specific surface area of the molecular sieve of the present invention is generally not less than 40%, which is much higher than that of the prior art MCM-22 molecular sieve (generally about 20%).
- the molecular sieve according to the present invention is particularly suitable as an adsorbent due to its high total specific surface area and external specific surface area, for example, for separating at least one component from a mixture of a plurality of components in a gas phase or a liquid phase. .
- the ten-membered ring semi-super cage of the MWW topology is exposed as much as possible, and the ten-membered ring channel is retained, so that it is particularly suitable for use as a catalyst in the organic compound conversion reaction, and can exhibit High reactant conversion capacity, in turn, exhibits high product selectivity.
- the organic compound conversion reaction for example, liquid phase alkylation of benzene with ethylene to produce ethylbenzene, liquid phase alkylation of benzene with propylene to produce cumene, butene isomerization, naphtha cracking Reaction, ethanol and benzene alkylation reaction, cyclohexene hydration reaction, and the like.
- the catalyst include an alkylation catalyst, an olefin hydration catalyst, an olefin oxidation catalyst, a hydrocracking catalyst, and an olefin isomerization catalyst.
- the molecular sieve according to the present invention exhibits at least comparable or even higher reactant conversion ability than the ITQ-2 molecular sieve even in reactions which are severely restricted by diffusion, such as the Beckmann rearrangement reaction of cyclohexanone oxime. This maximizes the original advantages of the ITQ-2 molecular sieve.
- the molecular sieve of the present invention when the benzene alkylation reaction is catalyzed as a catalyst, it has the advantages of low reaction temperature, high conversion rate, good selectivity, and stable operation.
- the molecular sieve according to the present invention has a stable skeleton structure, strong anti-coking ability, and is less likely to deposit carbon in the catalytic reaction, and thus can be used as a catalyst for a long period of time without being significantly deactivated.
- the molecular sieve according to the present invention can be regenerated by simple calcination after deactivation, and by this regeneration, its catalytic performance can be restored to substantially the same level as that of the fresh catalyst.
- the calcination conditions are such that the calcination temperature is usually from 300 to 800 ° C, preferably from 400 to 650 ° C, and the calcination time is usually from 1 to 10 hours, preferably from 3 to 6 hours.
- the calcination is generally carried out under an oxygen-containing atmosphere, such as an air or oxygen atmosphere.
- the molecular sieve according to the present invention may be in any physical form such as a powder, a granule or a molded article (e.g., a strip, a clover, etc.). These physical forms can be obtained in any manner conventionally known in the art, and are not particularly limited.
- the molecular sieve according to the present invention can be used in combination with other materials, thereby obtaining a molecular sieve composition.
- other materials for example, an active material and an inactive material can be mentioned.
- the active material include synthetic zeolite and natural zeolite.
- the inactive material (generally referred to as a binder) include clay, clay, silica gel, and alumina. These other materials may be used alone or in combination of any ones in any ratio.
- the amount of the other materials the conventional amounts in the art can be directly referred to, and are not particularly limited.
- any of the foregoing molecular sieves or the aforementioned molecular sieve compositions can also be used as a carrier or carrier component of the catalyst, and the active component is supported thereon in any manner conventionally known in the art, such as solution impregnation.
- These active components include, but are not limited to, active metal components (including Ni, Co, Mo, W or Cu, etc.), reactive inorganic auxiliaries (such as F, P, etc.) and organic compounds (such as organic acids, organic amines, etc.) .
- active components may be used alone or in combination of any ones in any ratio.
- As the amount of the active component it can be directly referred to the conventional amount in the art, and is not particularly limited.
- the SCM-2 molecular sieve or molecular sieve composition containing the SCM-2 molecular sieve generally requires removal of any organic templating agent, water, and the like present in its pores by calcination.
- the calcination may be performed in any conventional manner known in the art, such as the firing temperature is generally 300-800 deg.] C, preferably 400 - 650 °C, the calcination time is generally 1 to 10 hours, preferably 3-6 hours.
- the calcination is generally carried out under an oxygen-containing atmosphere, such as an air or oxygen atmosphere.
- the total pore volume, micropore volume, total specific surface area and external specific surface area of the molecular sieve are measured by a nitrogen physical adsorption-desorption method (BET method).
- BET method nitrogen physical adsorption-desorption method
- the experimental conditions for SCM-1 molecular sieve are: measuring temperature -169 ° C, the molecular sieve is pre-treated under vacuum at 300 ° C for 10 hours before measurement, and the experimental conditions for SCM - 2 molecular sieve are: measuring temperature -169 ° C, before measurement
- the molecular sieve was heat-treated at 550 ° C for 5 hours in an air atmosphere, and then vacuum pretreated at 300 ° C for 10 hours.
- the X-ray diffraction pattern (XRD) of the molecular sieve is determined by an X-ray powder diffractometer (such as the German Bruker D8 Advance powder diffractometer) using standard methods. Where a Cu-K ⁇ ray source, a nickel filter is used.
- TEM transmission electron microscope
- the molar ratio of the first oxide to the second oxide in the molecular sieve is obtained by inductively coupled plasma emission spectroscopy (for example, using the American Varian 725-ES inductive coupling) Plasma emission spectrometer) measurement.
- the content of water and organic templating agent in the molecular sieve is determined by thermogravimetric analysis (for example, using a US TA company SDT Q600 synchronous thermal analyzer under an oxygen atmosphere) Measurements were taken from 25 ° C at a temperature increase rate of 10 ° C / min to 800 ° C test sample weight loss curve).
- the yield of the molecular sieve is calculated by multiplying the ratio of the mass of the molecular sieve after calcination to the sum of the masses of the first oxide and the second oxide by 100%.
- the crystal thickness of the molecular sieve is measured by using a transmission electron microscope (such as the Dutch FEI G2F30 transmission electron microscope, operating voltage 300 kV) at 100,000 times.
- the molecular sieve was observed under magnification, and an observation field was randomly selected, and the average value of the sum of the thicknesses of all the plate crystals having a thickness of 5 ⁇ 0.8 nm in the observation field was calculated. Repeat this operation a total of 10 times. The average value of the sum of the average values of 10 times was taken as the crystal thickness.
- the relative crystallinity of the molecular sieve is measured by using MCM-22 molecular sieve as a reference and selecting it.
- the sum of the absolute peak intensities of the three diffraction peaks B is divided by A and multiplied by 100% to obtain the relative crystallinity of the molecular sieve to be tested.
- the relative crystallinity is subtracted from 100%, that is, the content of the amorphous impurities of the molecular sieve to be tested is obtained.
- the MCM-22 molecular sieve manufactured in Comparative Example I-1 was used as a reference.
- the service life of the molecular sieve is evaluated by continuously performing the catalytic conversion reaction under the same reaction conditions with the same amount of molecular sieve as a catalyst, in the same The greater the decrease in the conversion of the reactants during the reaction time, the shorter the service life of the molecular sieve.
- the following examples relate to the manufacture of SCM-1 molecular sieves.
- sodium aluminate Al 2 O 3 43.0% by weight, Na 2 O 35.0% by weight 12.64 g was dissolved in 362.40 g of water, and then an organic template was added with stirring: 39.68 g of hexamethyleneimine aqueous solution ( Hexamethyleneimine (80.0% by weight), 101.54 g of dicyclohexylamine, and finally 240 g of silica sol (SiO 2 40.0% by weight), the material ratio (molar ratio) of the reactants is:
- the XRD spectrum data of the product molecular sieve is shown in Table I-1, the XRD spectrum is shown in Figure 1, and the TEM photograph is shown in Figure 3a.
- the molecular sieve has a total pore volume of 0.68 cm 3 g -1 , a micropore volume of 0.12 cm 3 g -1 , a total specific surface area of 524 m 2 ⁇ g -1 , and an external specific surface area of 248 m 2 ⁇ g -1 .
- the ratio of the external specific surface area to the total specific surface area is 47.3%, and the composition is: SiO 2 /Al 2 O 3 molar ratio is 29.3, molecular sieve yield is 92%, crystal thickness is 5.4 nm, relative crystallinity is 92.2%, amorphous The content of impurities was 7.8%.
- sodium aluminate Al 2 O 3 43.0% by weight, Na 2 O 35.0% by weight 12.64 g was dissolved in 362.40 g of water, and then an organic template was added with stirring: 39.68 g of hexamethyleneimine aqueous solution (hexamethyleneimine 80.0% by weight), 145.06 g of dicyclohexylamine, and finally 240 g of silica sol (SiO 2 40.0% by weight), the material ratio (molar ratio) of the reactants is:
- the XRD spectrum data of the product molecular sieve is shown in Table I-2, and the XRD spectrum is similar to Figure 1.
- the molecular sieve has a total pore volume of 0.76 cm 3 g -1 , a micropore volume of 0.12 cm 3 g -1 , a total specific surface area of 533 m 2 ⁇ g -1 , and an external specific surface area of 257 m 2 ⁇ g -1 .
- the ratio of the external specific surface area to the total specific surface area is 48.2%, and the composition is: SiO 2 /Al 2 O 3 molar ratio is 28.6, molecular sieve yield is 82%, crystal thickness is 5.1 nm, relative crystallinity is 81.9%, amorphous The content of impurities was 18.1%.
- the XRD spectrum data of the product molecular sieve is shown in Table I-3, and the XRD spectrum is similar to Figure 1.
- the molecular sieve has a total pore volume of 0.88 cm 3 g -1 , a micropore volume of 0.13 cm 3 g -1 , a total specific surface area of 583 m 2 ⁇ g -1 , and an external specific surface area of 313 m 2 ⁇ g -1 .
- the ratio of the external specific surface area to the total specific surface area is 53.7%, and the composition is: SiO 2 /Al 2 O 3 molar ratio is 90.5, molecular sieve yield is 81%, crystal thickness is 5.6 nm, relative crystallinity is 84.4%, amorphous The content of impurities was 15.6%.
- the XRD spectrum data of the product molecular sieve is shown in Table I-4, and the XRD spectrum is similar to that of Figure 1.
- the total pore volume of the molecular sieve product is 0.80cm 3 g -1
- the micropore volume was 0.11cm 3 g -1
- total specific surface area of 511m 2 ⁇ g -1 an outer surface area of 224m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area is 43.8%
- the composition is: SiO 2 /Al 2 O 3 molar ratio is 46.1
- molecular sieve yield is 85%
- crystal thickness is 5.1 nm
- relative crystallinity is 77.9%
- the content of impurities was 22.1%.
- the XRD spectrum data of the product molecular sieve is shown in Table I-5, and the XRD spectrum is similar to Figure 1.
- the total pore volume of the molecular sieve product is 0.66cm 3 g -1
- the micropore volume was 0.12cm 3 g -1
- total specific surface area of 501m 2 ⁇ g -1 an outer surface area of 232m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area is 46.3%
- the composition is: SiO 2 /Al 2 O 3 molar ratio is 26.3
- molecular sieve yield is 85%
- crystal thickness is 5.7 nm
- relative crystallinity is 85.7%
- the content of impurities was 14.3%.
- the XRD spectrum data of the product molecular sieve is shown in Table I-6, and the XRD spectrum is similar to Figure 1.
- the molecular sieve has a total pore volume of 0.62 cm 3 g -1 , a micropore volume of 0.13 cm 3 g -1 , a total specific surface area of 496 m 2 ⁇ g -1 , and an external specific surface area of 227 m 2 ⁇ g -1 .
- the ratio of the external specific surface area to the total specific surface area is 45.8%, and the composition is: SiO 2 /Al 2 O 3 molar ratio is 39.7, molecular sieve yield is 89%, crystal thickness is 5.5 nm, relative crystallinity is 92.7%, amorphous The content of impurities was 7.3%.
- the XRD spectrum data of the product molecular sieve is shown in Table I-7, and the XRD spectrum is similar to Figure 1.
- the total pore volume of the molecular sieve product is 0.71cm 3 g -1
- the micropore volume was 0.14cm 3 g -1
- total specific surface area of 561m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area is 48.3%
- the composition is: SiO 2 /Al 2 O 3 molar ratio is 39.0
- molecular sieve yield is 88%
- crystal thickness is 5.5 nm
- relative crystallinity is 89.8%
- the content of impurities was 10.2%.
- the XRD spectrum data of the product molecular sieve is shown in Table I-8, and the XRD spectrum is similar to Figure 1.
- the total pore volume of the molecular sieve product is 0.75cm 3 g -1
- the micropore volume was 0.12cm 3 g -1
- total specific surface area of 518m 2 ⁇ g -1 a specific surface area of the outer 240m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area is 46.3%
- the composition is: SiO 2 /Al 2 O 3 molar ratio is 40.4
- molecular sieve yield is 81%
- crystal thickness is 5.3 nm
- relative crystallinity is 82.9%
- the content of impurities was 17.1%.
- Example I-1 50 g of the molecular sieve synthesized in Example I-1 was taken, exchanged 4 times with a solution of ammonium nitrate having a concentration of 1 mol/L, filtered, and dried. After that, it is thoroughly mixed with 20 g of alumina, kneaded with 5% by weight of nitric acid, and extruded into a strip. The strips of millimeters were then dried at 120 ° C and calcined at 520 ° C for 6 hours to prepare the desired catalyst.
- 0.3 g of the catalyst prepared above was charged in a fixed bed reactor, and then a mixture of benzene and ethylene was introduced.
- the reaction results were: ethylene conversion rate of 90%, ethylbenzene weight selectivity of 88.1%, diethylbenzene weight selectivity of 9.3%, triethylbenzene weight selectivity of 0.3%, and the rest were by-products.
- the ethylene conversion rate was reduced to 80% or less.
- the catalyst at this time was taken out, the catalyst was black, and it was calcined in an air atmosphere at 550 ° C for 5 hours to be regenerated. The regenerated catalyst was again used in the liquid phase alkylation reaction of benzene with ethylene according to the above reaction conditions, and continuously operated for 24 hours.
- reaction results were: ethylene conversion rate of 97%, ethylbenzene weight selectivity of 90.3%, and diethylbenzene weight selection.
- Example I-2 50 g of the molecular sieve synthesized in Example I-2 was taken and exchanged 4 times with a solution of ammonium nitrate having a concentration of 1 mol/L, filtered, and dried. After that, it is thoroughly mixed with 20 g of alumina, kneaded with 5% by weight of nitric acid, and extruded into a strip. The strips of millimeters were then dried at 120 ° C and calcined at 520 ° C for 6 hours to prepare the desired catalyst.
- 0.3 g of the catalyst prepared above was charged in a fixed bed reactor, and then a mixture of benzene and ethylene was introduced.
- Example I-1 50 g of the molecular sieve synthesized in Example I-1 was taken, exchanged 4 times with a solution of ammonium nitrate having a concentration of 1 mol/L, filtered, and dried. After that, it is thoroughly mixed with 20 g of alumina, kneaded with 5% by weight of nitric acid, and extruded into a strip. The strip of glutinous rice was then dried at 120 ° C and calcined at 520 ° C for 6 hours to prepare the desired catalyst.
- reaction results were: propylene conversion rate of 97%, cumene weight selectivity of 85%, diisopropylbenzene weight selectivity of 14.3%, triisopropylbenzene weight selectivity of 0.4%, and the balance being by-products.
- reaction results were: propylene conversion 91%, cumene weight selectivity 83.2%, diisopropylbenzene weight selectivity 15.1%, triisopropylbenzene weight selectivity 0.3%, and the rest were by-products.
- Example I-1 50 g of the molecular sieve synthesized in Example I-1 was taken, exchanged 4 times with a solution of ammonium nitrate having a concentration of 1 mol/L, filtered, and dried. Thereafter, the dried sample is tableted (pressure 15 MPa), sieved, and a sample between 20-40 mesh is taken, and calcined in an air atmosphere at 520 ° C for 6 hours to prepare a sample. The catalyst needed.
- cyclohexanone oxime 10 g of benzonitrile (solvent) and 0.1 g of the catalyst prepared above were sequentially added to a 50 mL flask equipped with a reflux condenser, and reacted at 130 ° C for 2 h to carry out Beckmann weight of cyclohexanone oxime. Row reaction.
- the reaction results were as follows: cyclohexanone oxime conversion rate was 67.3%, and caprolactam selectivity was 79.5%.
- Example I-1 50 g of the molecular sieve synthesized in Example I-1 was taken, exchanged 4 times with a solution of ammonium nitrate having a concentration of 1 mol/L, filtered, and dried. Thereafter, the dried sample was tableted (pressure: 15 MPa), sieved, and a sample of between 20 and 40 mesh was taken, and calcined at 520 ° C for 6 hours in an air atmosphere to prepare a desired catalyst.
- 0.1 g of the catalyst prepared above was charged in a fixed bed reactor, and then a mixture of biphenyl and propylene was introduced.
- the reaction conditions were as follows: a biphenyl flow rate of 1.36 mol/h, a biphenyl to propylene molar ratio of 4.0, and a reaction temperature of 250 °C. After 10 minutes of continuous operation, the conversion of biphenyl was 3.7%. After 2 hours of continuous operation, the conversion of biphenyl was almost reduced to zero.
- the catalyst was taken out and calcined in an air atmosphere at 550 ° C for 5 hours to be regenerated, and the regenerated catalyst was again used for the alkylation reaction of biphenyl and propylene under the above reaction conditions, and the continuous operation was carried out for 10 minutes, and the conversion of biphenyl was 3.6%. Restore to the level of fresh catalyst.
- MCM-22 molecular sieves were synthesized in the same manner as in Example 1 of U.S. Patent No. 4,954,325.
- the XRD spectrum data of the product MCM-22 molecular sieve is shown in Table I-9, the XRD spectrum is shown in Figure 1, and the TEM photograph is shown in Figure 3b.
- the total pore volume of the molecular sieve MCM-22 was 0.46cm 3 g -1
- the micropore volume was 0.18cm 3 g -1
- total specific surface area 485m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area was 24.7%
- the composition was: the SiO 2 /Al 2 O 3 molar ratio was 29.1, the relative crystallinity was 100.0%, and the amorphous impurity content was 0.0%.
- Example I-1 Same as Example I-1 except that the templating agent was a single template piperidine.
- the XRD spectrum data of the product molecular sieve is shown in Table I-10, and the XRD spectrum is significantly different from that of Figure 1.
- the total pore volume of the molecular sieve product is 0.13cm 3 g -1
- the micropore volume was 0.10cm 3 g -1
- total specific surface area of 285m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area was 10.9%, and the composition was: the SiO 2 /Al 2 O 3 molar ratio was 28.1.
- Example I-1 Same as Example I-1 except that the templating agent was a single templating agent dicyclohexylamine.
- the XRD pattern of the obtained crystallized product did not have any significant diffraction peaks.
- the MCM-22 molecular sieve was synthesized in the same manner as in Example 1 of U.S. Patent No. 4,954,325 except that the calcination step was omitted, thereby obtaining a MCM-22 molecular sieve precursor.
- 100 g of the molecular sieve precursor was weighed (the weight loss rate was 18.8% by thermogravimetry, the actual weight of the precursor was 81.2 g after deducting water and organic matter) and 570 g of cetyltrimethyl bromide.
- the molecular sieve has a total pore volume of 0.82 cm 3 g -1 , a micropore volume of 0.02 cm 3 g -1 , a total specific surface area of 750 m 2 g -1 , and an external specific surface area of 675 m 2 g -1 .
- the ratio of specific surface area to total specific surface area is 90.0%, and the composition is: SiO 2 /Al 2 O 3 molar ratio is 31.8, product quality is 35 g, yield is 43.1%, crystal thickness is 2.5 nm, relative crystallinity is 52.5%, non- The content of the crystal impurities was 47.5%.
- 0.3 g of the catalyst prepared above was charged in a fixed bed reactor, and then a mixture of benzene and ethylene was introduced.
- the reaction results were: ethylene conversion rate of 80.5%, ethylbenzene weight selectivity of 85.5%, diethylbenzene weight selectivity of 10.6%, triethylbenzene weight selectivity of 0.4%, and the remainder as by-products.
- the ethylene conversion rate was reduced to 70% or less.
- the catalyst at this time was taken out, the catalyst was black, and it was calcined in an air atmosphere at 550 ° C for 5 hours to be regenerated. The regenerated catalyst was again used in the liquid phase alkylation reaction of benzene with ethylene according to the above reaction conditions, and continuously operated for 24 hours.
- the reaction results were: ethylene conversion rate of 91.4%, ethylbenzene weight selectivity of 87.3%, and diethylbenzene weight selection.
- the property is 7.4%, the weight selectivity of triethylbenzene is 0.3%, and the rest are by-products.
- reaction results were: propylene conversion rate of 93%, cumene weight selectivity of 83%, diisopropylbenzene weight selectivity of 15.6%, triisopropylbenzene weight selectivity of 0.4%, and the balance being by-products.
- reaction results were: propylene conversion rate of 85%, cumene weight selectivity of 81.3%, diisopropylbenzene weight selectivity of 15.9%, triisopropylbenzene weight selectivity of 0.4%, and the remainder being by-products.
- 0.1 g of the catalyst prepared above was charged in a fixed bed reactor, and then a mixture of biphenyl and propylene was introduced.
- the reaction conditions were as follows: a biphenyl flow rate of 1.36 mol/h, a biphenyl to propylene molar ratio of 4.0, and a reaction temperature of 250 °C. After 10 minutes of continuous operation, the conversion of biphenyl was 1.9%. After 2 hours of continuous operation, the conversion of biphenyl was almost reduced to zero.
- the catalyst was taken out and calcined in an air atmosphere at 550 ° C for 5 hours for regeneration. The regenerated catalyst was again used for the alkylation reaction of biphenyl with propylene under the above reaction conditions, and the continuous operation was carried out for 10 minutes, and the conversion of biphenyl was 1.8%.
- 0.3 g of the catalyst prepared above was charged in a fixed bed reactor, and then a mixture of benzene and ethylene was introduced.
- the reaction results were: ethylene conversion rate of 71.6%, ethylbenzene weight selectivity of 85.8%, diethylbenzene weight selectivity of 13.7%, triethylbenzene weight selectivity of 0.3%, and the rest were by-products.
- the reaction results were: ethylene conversion rate of 57.3%, ethylbenzene weight selectivity of 87.5%, diethylbenzene weight selectivity of 11.6%, triethylbenzene weight selectivity of 0.4%, and the remainder as by-products.
- the ethylene conversion rate was reduced to 40% or less.
- the catalyst at this time was taken out, the catalyst was black, and it was calcined in an air atmosphere at 550 ° C for 5 hours to be regenerated.
- the regenerated catalyst was again used in the liquid phase alkylation reaction of benzene with ethylene according to the above reaction conditions, and the operation was continued for 24 hours.
- the reaction result was: ethylene conversion rate of 62.4%, and the activity decreased significantly, and the level of fresh catalyst could not be restored.
- reaction results were: propylene conversion rate of 74%, cumene weight selectivity of 87%, diisopropylbenzene weight selectivity of 12.1%, triisopropylbenzene weight selectivity of 0.3%, and the balance being by-products.
- reaction results were: propylene conversion rate of 61%, cumene weight selectivity of 87.3%, diisopropylbenzene weight selectivity of 11.9%, triisopropylbenzene weight selectivity of 0.3%, and the remainder as by-products.
- cyclohexanone oxime 10 g of benzonitrile (solvent) and 0.1 g of the catalyst prepared above were sequentially added to a 50 mL flask equipped with a reflux condenser, and reacted at 130 ° C for 2 h to carry out Beckmann weight of cyclohexanone oxime. Row reaction.
- the reaction results were as follows: cyclohexanone oxime conversion rate was 65.5%, and caprolactam selectivity was 79.1%.
- 0.1 g of the catalyst prepared above was charged in a fixed bed reactor, and then a mixture of biphenyl and propylene was introduced.
- the reaction conditions were as follows: a biphenyl flow rate of 1.36 mol/h, a biphenyl to propylene molar ratio of 4.0, and a reaction temperature of 250 °C. After 10 minutes of continuous operation, the conversion of biphenyl was 4%. After 2 hours of continuous operation, the conversion of biphenyl was almost reduced to zero.
- the catalyst was taken out and calcined in an air atmosphere at 550 ° C for 5 hours for regeneration. The regenerated catalyst was again used for the alkylation reaction of biphenyl with propylene under the above reaction conditions, and the continuous operation was carried out for 10 minutes.
- the conversion of biphenyl was 2.8%, and the activity was markedly lowered, and the level of the fresh catalyst could not be recovered.
- the following examples relate to the manufacture of SCM-2 molecular sieves.
- sodium aluminate Al 2 O 3 43.0% by weight, Na 2 O 35.0% by weight 12.64 g was dissolved in 362.40 g of water, and then an organic template was added with stirring: 39.68 g of hexamethyleneimine aqueous solution (hexamethyleneimine 80.0% by weight), 101.54 g of dicyclohexylamine, and finally 240 g of silica sol (SiO 2 40.0% by weight), the material ratio (molar ratio) of the reactants is:
- the XRD spectrum data of the product molecular sieve is shown in Table II-1, and the XRD spectrum is shown in Fig. 2.
- the molecular sieve has a total pore volume of 0.68 cm 3 g -1 , a micropore volume of 0.12 cm 3 g -1 , a total specific surface area of 524 m 2 ⁇ g -1 , and an external specific surface area of 248 m 2 ⁇ g -1 .
- the ratio of the external specific surface area to the total specific surface area is 47.3%, and the composition is: the SiO 2 /Al 2 O 3 molar ratio is 29.3, the water/SiO 2 mass ratio is 0.07, and the organic template/SiO 2 mass ratio is 0.15.
- the molecular sieve yield was 92%, and the crystal thickness was 5.4 nm.
- sodium aluminate Al 2 O 3 43.0% by weight, Na 2 O 35.0% by weight 12.64 g was dissolved in 362.40 g of water, and then an organic template was added with stirring: 39.68 g of hexamethyleneimine aqueous solution (hexamethyleneimine 80.0% by weight), 145.06 g of dicyclohexylamine, and finally 240 g of silica sol (SiO 2 40.0% by weight), the material ratio (molar ratio) of the reactants is:
- the XRD spectrum data of the product molecular sieve is shown in Table II-2, and the XRD spectrum is similar to FIG.
- the molecular sieve has a total pore volume of 0.76 cm 3 g -1 , a micropore volume of 0.12 cm 3 g -1 , a total specific surface area of 533 m 2 ⁇ g -1 , and an external specific surface area of 257 m 2 ⁇ g -1 .
- the ratio of the external specific surface area to the total specific surface area is 48.2%, and the composition is: the SiO 2 /Al 2 O 3 molar ratio is 28.6, the water/SiO 2 mass ratio is 0.06, and the organic template/SiO 2 mass ratio is 0.17.
- the molecular sieve yield was 82%, and the crystal thickness was 5.1 nm.
- the XRD spectrum data of the product molecular sieve is shown in Table II-3, and the XRD spectrum is similar to Figure 2.
- the molecular sieve has a total pore volume of 0.88 cm 3 g -1 , a micropore volume of 0.13 cm 3 g -1 , a total specific surface area of 583 m 2 ⁇ g -1 , and an external specific surface area of 313 m 2 ⁇ g -1 .
- the ratio of the external specific surface area to the total specific surface area is 53.7%, and the composition is: the SiO 2 /Al 2 O 3 molar ratio is 90.5, the water/SiO 2 mass ratio is 0.05, and the organic template/SiO 2 mass ratio is 0.15.
- the molecular sieve yield was 81%, and the crystal thickness was 5.6 nm.
- the XRD spectrum data of the product molecular sieve is shown in Table II-4, and the XRD spectrum is similar to FIG. Was measured, the total pore volume of the molecular sieve product is 0.80cm 3 g -1, the micropore volume was 0.11cm 3 g -1, total specific surface area of 511m 2 ⁇ g -1, an outer surface area of 224m 2 ⁇ g -1 The ratio of the external specific surface area to the total specific surface area is 43.8%, and the composition is: the SiO 2 /Al 2 O 3 molar ratio is 46.1, the water/SiO 2 mass ratio is 0.06, and the organic template/SiO 2 mass ratio is 0.16.
- the molecular sieve yield was 85%, and the crystal thickness was 5.1 nm.
- the XRD spectrum data of the product molecular sieve is shown in Table II-5, and the XRD spectrum is similar to FIG. Was measured, the total pore volume of the molecular sieve product is 0.66cm 3 g -1, the micropore volume was 0.12cm 3 g -1, total specific surface area of 501m 2 ⁇ g -1, an outer surface area of 232m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area is 46.3%, and the composition is: the SiO 2 /Al 2 O 3 molar ratio is 26.3, the water/SiO 2 mass ratio is 0.05, and the organic template/SiO 2 mass ratio is 0.18.
- the molecular sieve yield was 85% and the crystal thickness was 5.7 nm.
- the XRD spectrum data of the product molecular sieve is shown in Table II-6, and the XRD spectrum is similar to FIG.
- the molecular sieve has a total pore volume of 0.62 cm 3 g -1 , a micropore volume of 0.13 cm 3 g -1 , a total specific surface area of 496 m 2 ⁇ g -1 , and an external specific surface area of 227 m 2 ⁇ g -1 .
- the ratio of the external specific surface area to the total specific surface area is 45.8%, and the composition is: the SiO 2 /Al 2 O 3 molar ratio is 39.7, the water/SiO 2 mass ratio is 0.07, and the organic template/SiO 2 mass ratio is 0.17.
- the molecular sieve yield was 89%, and the crystal thickness was 5.5 nm.
- the XRD spectrum data of the product molecular sieve is shown in Table II-7, and the XRD spectrum is similar to that of Figure 2.
- the total pore volume of the molecular sieve product is 0.71cm 3 g -1
- the micropore volume was 0.14cm 3 g -1
- total specific surface area of 561m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area is 48.3%
- the composition is: the SiO 2 /Al 2 O 3 molar ratio is 39.0, the water/SiO 2 mass ratio is 0.07, and the organic template/SiO 2 mass ratio is 0.16.
- the molecular sieve yield was 88% and the crystal thickness was 5.5 nm.
- the XRD spectrum data of the product molecular sieve is shown in Table II-8, and the XRD spectrum is similar to FIG. Was measured, the total pore volume of the molecular sieve product is 0.75cm 3 g -1, the micropore volume was 0.12cm 3 g -1, total specific surface area of 518m 2 ⁇ g -1, a specific surface area of the outer 240m 2 ⁇ g -1 The ratio of the external specific surface area to the total specific surface area is 46.3%, and the composition is: the SiO 2 /Al 2 O 3 molar ratio is 40.4, the water/SiO 2 mass ratio is 0.06, and the organic template/SiO 2 mass ratio is 0.15.
- the molecular sieve yield was 81%, and the crystal thickness was 5.3 nm.
- Example II-1 50 g of the molecular sieve synthesized in Example II-1 was taken, heat-treated at 550 ° C for 5 hours in an air or oxygen atmosphere, and then exchanged 4 times with a 1 mol/L ammonium nitrate solution, filtered, and dried. After that, it is thoroughly mixed with 20 g of alumina, kneaded with 5% by weight of nitric acid, and extruded into a strip. The strips of millimeters were then dried at 120 ° C and calcined at 520 ° C for 6 hours to prepare the desired catalyst.
- Example II-2 50 g of the molecular sieve synthesized in Example II-2 was taken, heat-treated at 550 ° C for 5 hours in an air or oxygen atmosphere, and then exchanged 4 times with a solution of 1 mol/L ammonium nitrate, filtered, and dried. After that, it is thoroughly mixed with 20 g of alumina, kneaded with 5% by weight of nitric acid, and extruded into a strip. The strips of millimeters were then dried at 120 ° C and calcined at 520 ° C for 6 hours to prepare the desired catalyst.
- Example II-1 50 g of the molecular sieve synthesized in Example II-1 was taken, heat-treated at 550 ° C for 5 hours in an air or oxygen atmosphere, and then exchanged 4 times with a 1 mol/L ammonium nitrate solution, filtered, and dried. After that, it is thoroughly mixed with 20 g of alumina, kneaded with 5% by weight of nitric acid, and extruded into a strip. The strips of millimeters were then dried at 120 ° C and calcined at 520 ° C for 6 hours to prepare the desired catalyst.
- MCM-22 molecular sieves were synthesized in the same manner as in Example 1 of U.S. Patent No. 4,954,325.
- the XRD spectrum data of the product MCM-22 molecular sieve is shown in Table II-9, and the XRD spectrum is shown in Fig. 2.
- the total pore volume of the molecular sieve MCM-22 was 0.46cm 3 g -1
- the micropore volume was 0.18cm 3 g -1
- total specific surface area of 485m 2 ⁇ g -1 an outer surface area of 120m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area was 24.7%
- the composition was: the SiO 2 /Al 2 O 3 molar ratio was 29.1.
- Example II-1 Same as Example II-1 except that the templating agent was a single template piperidine.
- the XRD spectrum data of the product molecular sieve is shown in Table II-10, and the XRD spectrum is significantly different from that of Figure 2.
- the total pore volume of the molecular sieve product is 0.13cm 3 g -1
- the micropore volume was 0.10cm 3 g -1
- total specific surface area of 285m 2 ⁇ g -1
- the ratio of the external specific surface area to the total specific surface area was 10.9%, and the composition was: the SiO 2 /Al 2 O 3 molar ratio was 28.1.
- Example II-1 Same as Example II-1 except that the templating agent is a single templating agent dicyclohexylamine.
- the XRD pattern of the obtained crystallized product did not have any significant diffraction peaks.
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Abstract
Description
Claims (11)
- 权利要求1或3所述的分子筛,其中,经BET法测得的总孔体积不低于0.5厘米3/克,优选0.55-0.90厘米3/克,经BET法测得的总比表面积不低于450米2/克,优选480-680米2/克,经BET法测得的外比表面积不低于185米2/克,优选200-400米2/克,并且外比表面积占总比表面积的比例不低于40%,优选45-65%。
- 权利要求1或3所述的分子筛,具有MWW拓扑骨架结构,其晶体的至少80%、优选至少85%、更优选至少90%、更优选至少95%、更优选至少99%是厚度约为5nm(TEM法测量)的片状晶体。
- 一种制造分子筛的方法,包括在晶化条件下使第一氧化物源、第二氧化物源、碱源、有机模板剂、任选的卤素源和水接触,以获得分子筛的步骤,和任选地,焙烧所述获得的分子筛的步骤,其中,所述有机模板剂选自第一有机模板剂与第二有机模板剂的 组合,所述第一有机模板剂与所述第二有机模板剂的摩尔比为0.1-5.0,优选0.3-3.5,更优选0.4-1.5,所述第一有机模板剂选自氮杂单环C5-15环烷烃(优选C6-10环烷烃,比如环己烷、环庚烷、环辛烷、环壬烷和环癸烷)中的至少一种,优选选自一氮杂、二氮杂或三氮杂单环C5-15环烷烃(优选C6-10环烷烃,比如环己烷、环庚烷、环辛烷、环壬烷和环癸烷)中的至少一种,更优选选自环骨架由n个和m个构成的饱和单环化合物(其中,各R1和R2各自独立地选自氢、C1-4直链或支链烷基和C2-4直链或支链烯基,优选各自独立地选自氢和甲基,最优选氢,各R3为氢,n为4至12的整数,优选5至8的整数,m为1至3的整数,优选1或2)中的至少一种,更优选选自六亚甲基亚胺(C/N比为6)、哌啶(C/N比为5)、2-甲基哌啶(C/N比为5)和高哌嗪(C/N比为2.5)中的至少一种,所述第二有机模板剂选自氮杂芳香烃和下式(I)所示的化合物中的至少一种,式(I)中,R4、R5和R6各自独立地选自氢、C1-12直链或支链烷基、C2-12直链或支链烯基、C5-12单环环烷基和C5-12单环环烯基,前提是(1)R4、R5和R6中的至多一个是氢,和(2)R4、R5和R6中的至少一个(优选至少两个)选自所述C5-12单环环烷基和所述C5-12单环环烯基,更优选R4、R5和R6中的至少一个(优选至少两个)选自所述C5-12单环环烷基,所述式(I)所示的化合物更优选选自N,N-二乙基环己胺(C/N比为10)、二环己基胺(C/N比为12)和N-甲基二环己基胺(C/N比为13)中的至少一种,所述氮杂芳香烃选自氮杂C6-20芳香烃(优选C6-14芳香烃,尤其是苯、萘、蒽和菲)中的至少一种,任选在构成其环骨架的每个氮原子上,还进一步带有一个选自C1-12直链或支链烷基、C2-12直链或支链烯基、C5-12单环环烷基、C5-12单环环烯基和C6-20芳基的取代基,所述氮杂芳香烃优选选自一氮杂、二氮杂或三氮杂C6-20芳香烃(优选C6-14芳香烃,尤其是苯、萘、蒽和菲)中的至少一种,更优选选自喹啉(C/N比为9)、N-苯基喹啉(C/N比为15)、N-环己基吡啶(C/N比为11)和6-甲基喹啉(C/N比为9)中的至少一种。
- 权利要求7所述的制造分子筛的方法,其中,所述氮杂单环环烷烃的C/N比大于2,更优选2.5或更高,所述式(I)所示的化合物的C/N比为10或更高、12或更高或者13或更高,并且所述氮杂芳香烃的C/N比为9或更高、10或更高或者11或更高。
- 权利要求7所述的制造分子筛的方法,其中,所述第一氧化物源(以所述第一氧化物为计)、所述第二氧化物源(以所述第二氧化物为计)、所述碱源、所述有机模板剂、所述卤素源和水的摩尔比为1∶(0.0005-0.05)∶(0.01-0.3)∶(0.05-1.4)∶(0-0.5)∶(5-100),优选1∶(0.005-0.04)∶(0.05-0.2)∶(0.2-1.0)∶(0-0.3)∶(10-40),所述晶化条件包括:晶化温度为140-180℃,优选145-170℃,晶化时间为1-6天,优选2-5天,并且所述焙烧条件包括:焙烧温度为300-800℃,优选400-650℃,焙烧时间为1-10小时,优选3-6小时。
- 一种分子筛组合物,包含权利要求1-6任一所述的分子筛或者按照权利要求7-9任一项所述的制造分子筛的方法制造的分子筛,以及粘结剂。
- 权利要求1-6任一所述的分子筛、按照权利要求7-9任一项所述的制造分子筛的方法制造的分子筛或者权利要求10所述的分子筛组合物作为吸附剂、烷基化催化剂、烯烃水合催化剂、烯烃氧化催化剂、加氢裂化催化剂或者烯烃异构化催化剂的应用。
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CN107777701A (zh) * | 2016-08-30 | 2018-03-09 | 中国石油化工股份有限公司 | Scm‑12分子筛及其制备方法 |
CN107774297B (zh) * | 2016-08-30 | 2020-05-01 | 中国石油化工股份有限公司 | Scm-12分子筛催化剂、制备方法及其应用 |
CN108862313A (zh) * | 2018-08-13 | 2018-11-23 | 海南医学院 | 一种hmi/pi复合模板剂合成mcm-56分子筛的方法 |
CN108862313B (zh) * | 2018-08-13 | 2021-09-03 | 海南医学院 | 一种hmi/pi复合模板剂合成mcm-56分子筛的方法 |
WO2022015491A1 (en) * | 2020-07-16 | 2022-01-20 | Exxonmobil Chemical Patents Inc. | Method of synthesizing a molecular sieve of mww framework type |
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SG11201602303PA (en) | 2016-05-30 |
TWI640362B (zh) | 2018-11-11 |
BR112016006685A2 (pt) | 2017-08-01 |
TW201524599A (zh) | 2015-07-01 |
ES2934225T3 (es) | 2023-02-20 |
BR112016006685B1 (pt) | 2021-09-28 |
US20170001873A1 (en) | 2017-01-05 |
KR102230996B1 (ko) | 2021-03-22 |
CN104511271B (zh) | 2017-12-15 |
BR112016006685B8 (pt) | 2021-10-19 |
EP3050848A1 (en) | 2016-08-03 |
JP6392860B2 (ja) | 2018-09-19 |
DK3050848T3 (da) | 2022-12-19 |
EP3050848B1 (en) | 2022-11-23 |
JP2016536240A (ja) | 2016-11-24 |
CN104511271A (zh) | 2015-04-15 |
US10099935B2 (en) | 2018-10-16 |
EP3050848A4 (en) | 2017-03-29 |
KR20160058930A (ko) | 2016-05-25 |
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