Molecular sieve boron SSZ-113

By using 1,3 bis(2,3-dimethyl-1H-imidazole)propane bications as structural guides, the boron SSZ-113 molecular sieve was successfully synthesized, and the catalytic performance was improved by removing structural guides, the existing solutions were solved The problem of failing to successfully synthesize SSZ-113 molecular sieve containing boron in the technology has achieved its efficient catalytic effect in the conversion reaction of organic compounds.

CN119421858APending Publication Date: 2025-02-11CHEVRON USA INC
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Patent Information

Application Number
CN202380049693.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-05-31
Filing Date
2023-05-30
Publication Date
2025-02-11

AI Technical Summary

Technical Problem

The prior art has not been able to successfully synthesize SSZ-113 crystalline molecular sieve containing boron, and its catalytic properties in organic compound conversion reactions are not fully utilized.

Method used

Boron SSZ-113 molecular sieve was successfully synthesized by using 1,3 bis(2,3-dimethyl-1H-imidazole)propane bications as structural guides, and the structural guides were removed by calcination or ozone treatment to improve their catalysis performance.

Benefits of technology

The synthesis and catalytic performance of boron SSZ-113 molecular sieve has been improved, providing unique catalytic capabilities in organic compound conversion reactions, and showing important value as an adsorption/separation material.

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Abstract

A novel synthetic crystalline boron germanium silicate molecular sieve material is provided, named as boron SSZ-113. Boron SSZ-113 may be synthesized using a 1, 3 bis (2, 3-dimethyl-1H-imidazole # imgabs0 #) propane dication as a structure directing agent. The boron SSZ-113 may be used in organic compound conversion reactions and / or adsorption processes, and in particular in reforming reactions.
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Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Application No. 63 / 365,538, filed on May 31, 2022, the complete disclosure of which is incorporated herein by reference in its entirety. Field of the Invention

[0003] The present disclosure relates to a novel synthetic crystalline molecular sieve designated as SSZ-113 containing boron in its framework. The present disclosure also relates to its synthesis. Background of the Invention

[0005] Molecular sieves are a commercially important class of materials that have a unique crystal structure with a defined pore structure shown by a unique X-ray diffraction (XRD) pattern. Molecular sieves also have a specific chemical composition. The crystal structure defines cavities and pores that are characteristic of a specific type of molecular sieve. Providing new molecular sieves that differ in crystal structure and composition can lead to unique catalysts or adsorption / separation materials. Changing the crystal structure is always fraught with difficulty, but success can provide benefits in new catalysts for organic compound conversion reactions. U.S. Patent Publication 2019 / 0256364 discloses the preparation of SSZ-113. However, it does not disclose boron SSZ-113. Summary of the invention

[0006] According to the present disclosure, 1,3-bis(2,3-dimethyl-1H-imidazole ) propane dication as a structure directing agent (SDA) to synthesize a crystalline molecular sieve named boron SSZ-113. The synthesis was found to be successful in providing a boron-containing molecular sieve having the SSZ-113 crystal structure.

[0007] In one aspect, a boron SSZ-113 molecular sieve is prepared which, in its as-synthesized form, has a powder X-ray diffraction pattern comprising at least the peaks in Table 3 below.

[0008] In its as-synthesized and anhydrous form, the boron molecular sieve may have a chemical composition comprising the following molar relationship:

[0009] Table 1

[0010]

[0011] wherein T is a tetravalent element including silicon and germanium; and Q + Contains 1,3-bis(2,3-dimethyl-1H-imidazole ) propane dication. In one embodiment, the ratio of TO2 / B2O3 is in the range of 15-20.

[0012] In its calcined form, the boron SSZ-113 molecular sieve may have a chemical composition comprising the following molar relationship:

[0013] B2O3:(n)TO2

[0014] wherein n is ≥ 10; and T is a tetravalent element including silicon and germanium.

[0015] In another aspect, a method for synthesizing a boron molecular sieve is provided. The method comprises (a) providing a reaction mixture comprising: (1) a silicon oxide source; (2) a germanium source; (3) a boron source; (4) 1,3-bis(2,3-dimethyl-1H-imidazole ) propane dihydroxide (Q); (5) a fluoride ion source; and (6) water. The reaction mixture is then subjected to crystallization conditions sufficient to form crystals of SSZ-113 boron molecular sieve. T is as described above.

[0016] The boron-containing molecular sieve is then treated to remove the structure directing agent (SDA), designated Q above. The SDA may be removed by calcination, or by ozone treatment, for example at 150° C. It has also been found that treatment of the molecular sieve with dimethylformamide also removes SDA.

[0017] In yet another aspect, a method of converting a feedstock comprising an organic compound to a conversion product is provided, comprising contacting the feedstock with a catalyst comprising a boron SSZ-113 molecular sieve under organic compound conversion conditions.

[0018] Among other factors, the present method allows technicians to obtain boron SSZ-113 molecular sieve, which is borogermanosilicate. This new molecular sieve prepared by the present method provides a unique ability to act as a catalyst in organic compound conversion reactions (especially reforming). Molecular sieves have also found important value as adsorption / separation materials.

[0019] Detailed Description

[0020] definition

[0021] The term "framework type" has the meaning described in "Atlas of Zeolite Framework Types" by Ch. Baerlocher and LB McCusker and DH Olsen (Elsevier, 6th revised edition, 2007).

[0022] The term "boron germanosilicate" refers to a crystalline microporous solid comprising boron, germanium and silicon oxide within its framework structure. Boron germanosilicates may be "pure boron germanosilicates" (i.e., no other detectable metal oxides are present within its framework structure) or optionally substituted. When described as "optionally substituted", the corresponding framework may contain other atoms (e.g., Al, Ga, In, Fe, Ti, Zr) substituted for one or more atoms not already present in the bulk framework.

[0023] The term "as-synthesized" is used herein to refer to the molecular sieve in its form after crystallization and before removal of the structure directing agent.

[0024] The term "anhydrous" is used herein to refer to molecular sieves that are substantially free of physically and chemically adsorbed water.

[0025] As used herein, the numbering scheme of the Periodic Table of the Elements is as disclosed in Chem. Eng. News 1985, 63(5), 26-27.

[0026] Synthesis of molecular sieves

[0027] The molecular sieve boron SSZ-113 can be synthesized by: (a) providing a catalyst comprising: (1) a silicon oxide source; (2) a germanium source; (3) a boron source; (4) 1,3-bis(2,3-dimethyl-1H-imidazole ) a propane dication such as dihydroxide (Q); (5) a fluoride ion source; and (6) a reaction mixture of water; and then (b) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of SSZ-113 boron molecular sieve. If aluminum is present, it is present only in small amounts. Therefore, the framework contains a large amount of boron.

[0028] The reaction mixture may have a composition in terms of molar ratios within the ranges listed in Table 2:

[0029] Table 2

[0030]

[0031]

[0032] wherein T and Q are as described herein above.

[0033] Suitable sources of silicon oxide include colloidal silicon dioxide, fumed silicon dioxide, precipitated silicon dioxide, alkali metal silicates and tetraalkyl orthosilicates. FAU framework type zeolites such as zeolite Y may also be a source of silicon oxide. In such cases, the zeolite has a SiO2 / Al2O3 molar ratio of at least 250, and preferably at least 300. In one embodiment, the molar ratio is in the range of 300-500.

[0034] Germanium sources may include germanium oxide and germanium alkoxides (eg, germanium ethoxide, germanium isopropoxide), germanium hydroxide, and germanium carboxylates.

[0035] The molar ratio of Si:Ge may range from 4-12, such as 6-10.

[0036] The boron source may include boric acid, which is preferred. Other suitable sources may also be used but are not preferred.

[0037] Fluoride ion sources may include, for example, hydrogen fluoride, ammonium fluoride, and ammonium bifluoride.

[0038] Q may include 1,3-bis(2,3-dimethyl-1H-imidazole) represented by the following structure (1): ) Propane dication:

[0039]

[0040] The above diquaternary ammonium compounds can be readily synthesized by reaction of 1,3-dihalopropane (eg 1,3-dibromopropane or 1,3-diiodopropane) with 1,2-dimethylimidazole by methods known in the art (see, eg, SIZones et al. J. Mater. Chem. 2005, 15, 4215-4223).

[0041] Suitable sources of Q are hydroxides and / or other salts of diquaternary ammonium compounds.

[0042] The reaction mixture may contain seeds of boron SSZ-113 molecular sieve material, such as boron SSZ-113 from a previous synthesis, in an amount of 0.01-10,000 ppm by weight (e.g., 100-5000 ppm by weight) of the reaction mixture. Seeding may be beneficial in reducing the amount of time required for complete crystallization to occur. Additionally, seeding may result in a product purity that is higher than any unwanted phase by promoting nucleation and / or formation of boron SSZ-113.

[0043] Note that the reaction mixture components can be supplied by more than one source. In addition, two or more reaction components can be provided by one source. The reaction mixture can be prepared in batches or continuously.

[0044] Crystallization and post-synthesis processing

[0045] The reaction mixture can be prepared under static, tumbling or stirring conditions in a suitable reactor vessel (e.g., polypropylene jars or Teflon TMThe crystallization of the boron molecular sieve from the above reaction mixture is carried out in a 10-150°C-lined or stainless steel autoclave) at a temperature of 125°C-200°C (e.g., 150°C to 170°C) for a time sufficient for crystallization to occur at the temperature used (e.g., 1 day to 20 days, or 2 days to 10 days). The hydrothermal crystallization process is typically carried out under pressure, such as in an autoclave, and is preferably under autogenous pressure.

[0046] Once the boron-containing molecular sieve crystals are formed, the solid product can be recovered from the reaction mixture by standard mechanical separation techniques such as centrifugation or filtration. The recovered crystals are washed with water and then dried to obtain the as-synthesized molecular sieve crystals of SSZ-113 boron. The drying step can be carried out at an elevated temperature (e.g., 75° C. to 150° C.) for several hours (e.g., about 4 to 24 hours). The drying step can be carried out under vacuum or atmospheric pressure.

[0047] As a result of the crystallization process, the recovered crystalline molecular sieve product contains within its pore structure at least a portion of the structure directing agent used in its synthesis.The as-synthesized molecular sieve may be subjected to treatment to remove some or all of the structure directing agent used in its synthesis.

[0048] Removal of the structure directing agent may be performed by heat treatment (e.g., calcination), wherein the as-synthesized molecular sieve is heated at a temperature sufficient to remove some or all of the structure directing agent. Although subatmospheric pressure may be used for the heat treatment, atmospheric pressure is desired for reasons of convenience. The heat treatment may be performed at a temperature of at least 370° C. for at least one minute and typically not longer than 20 hours (e.g., 1-12 hours). The heat treatment may be performed at a temperature of up to about 925° C. For example, the heat treatment may be performed at a temperature of 400° C. to 600° C. in the presence of an oxygen-containing gas.

[0049] Additionally or alternatively, the structure directing agent can be removed by treatment with ozone. See, for example, AN Parikh et al., Micropor. Mesopor. Mater. 2004, 76, 17-22. In one embodiment, the use of ozone is preferred because it provides a higher micropore volume. It has also been found that SDA can be removed by treatment with dimethylformamide, for example at about 150°C.

[0050] Characterization of Molecular Sieve

[0051] In its as-synthesized and anhydrous form, the molecular sieve SSZ-113 with boron may have a chemical composition comprising the following molar relationships listed in Table 1:

[0052] Table 1

[0053]

[0054] wherein T is a tetravalent element including silicon and germanium; and Q+ comprises 1,3-bis(2,3-dimethyl-1H-imidazole ) propane dication. In one embodiment, the ratio of TO2 / B2O3 is in the range of 15-20.

[0055] It should be noted that the as-synthesized form of the present SSZ-113 molecular sieve with boron may have a molar ratio of reactants that differs from the molar ratio of the reaction mixture used to prepare the as-synthesized form. This result may occur due to incomplete incorporation of 100% of the reactants of the reaction mixture into the crystals formed (from the reaction mixture).

[0056] In its calcined form, molecular sieve boron SSZ-113 may have a chemical composition comprising the following molar relationship:

[0057] B2O3:(n)TO2

[0058] wherein n is ≥ 10 (eg, 15 or greater, or in the range of 15-20); and T is a tetravalent element including silicon and germanium.

[0059] Boron SSZ-113 in its as-synthesized and calcined forms has a characteristic powder X-ray diffraction pattern which, in its as-synthesized form of the molecular sieve, includes at least the lines listed in Table 3 below and, in its calcined form of the molecular sieve, includes at least the peaks listed in Table 4 below.

[0060] Table 3

[0061] Characteristic peaks of the as-synthesized boron SSZ-113

[0062] <![CDATA[2-θ (a) ]]> d-spacing, nm <![CDATA[Relative intensity (b) > 7.87 1.123 W 8.84 1.000 S 9.63 0.918 M 15.81 0.560 VS 16.85 0.526 VS 18.20 0.487 M 20.92 0.424 S 23.40 0.380 VS 23.78 0.374 VS 24.71 0.360 W 26.12 0.341 S 27.47 0.324 W

[0063] (a) ±0.30 degrees

[0064] (b) The powder XRD patterns provided are based on a relative intensity scale, where the most intense line in the X-ray pattern is assigned a value of 100: W = weak (>0 to ≤20); M = medium (>20 to ≤40); S = strong (>40 to ≤60); VS = very strong (>60 to ≤100).

[0065] Table 4

[0066] Characteristic peaks of calcined boron SSZ-113

[0067]

[0068]

[0069] (a) ±0.30 degrees

[0070] (b) The powder XRD patterns provided are based on a relative intensity scale, where the most intense line in the X-ray pattern is assigned a value of 100: W = weak (>0 to ≤20); M = medium (>20 to ≤40); S = strong (>40 to ≤60); VS = very strong (>60 to ≤100).

[0071] As will be appreciated by those skilled in the art, the determination of the parameter 2-theta (2θ) is subject to human and machine errors, the combination of which can impose an uncertainty of approximately ±0.30° on each reported value of 2-θ. o ) is recorded as the ratio of the peak intensity to the intensity of the strongest peak, which is assigned a value of 100. The relative intensities of the d-spacings are indicated by the notations VS, S, M, and W, which represent very strong, strong, medium, and weak, respectively. In terms of relative intensity, the above designations are defined as: W (weak) <20; M (medium) is >20 and <40; S (strong) is 40 and <60; and VS (very strong) is 60. When the intensity is near the end of the range, the intensity can be characterized as being in either range. For example, an intensity of 18-22 can be listed as WM. However, due to variations in line intensity, as is known in the art, one or more lines may have intensities in adjacent ranges.

[0072] The powder X-ray diffraction patterns presented herein were collected by standard techniques. The radiation was CuKα radiation. The peak heights and positions varied with 2θ (where θ is the Bragg angle), the relative intensities of the peaks were read (adjusted for background), and d (corresponding to the interplanar spacing of the recorded lines) could be calculated.

[0073] The slight changes in the diffraction pattern can be caused by the changes in the molar ratio of the framework material of the sample caused by the change in the lattice constant. In addition, disordered materials and / or sufficiently small crystals will affect the shape and intensity of the peak, thereby causing significant peak broadening. The slight changes in the diffraction pattern can also be caused by the changes in the organic compounds used in the preparation. Calcination can also cause slight shifts in the XRD pattern. Despite these slight disturbances, the basic lattice structure remains unchanged.

[0074] Adsorption and catalysis

[0075] The present molecular sieve boron SSZ-113 (in which some or all of the Q+ is removed) can be used as an adsorbent or as a catalyst to catalyze a wide variety of organic compound conversion processes, including many processes of current commercial / industrial importance. A particular application of catalysts containing boron SSZ-113 is in reforming reactions, especially if the catalyst contains platinum.

[0076] Catalytic reforming is one of the basic petroleum refining processes for upgrading light hydrocarbon feedstocks (often referred to as naphtha feedstocks). Products from catalytic reforming may include high-octane gasoline, aromatic compounds (e.g., benzene, toluene, xylene, and ethylbenzene) and / or hydrogen that can be used as automotive fuels. The reactions typically included in catalytic reforming include dehydrogenation cyclization, isomerization, and dehydrogenation of naphtha range hydrocarbons, dehydrogenation cyclization and dehydrogenation of linear and slightly branched alkanes, and dehydrogenation of cycloalkanes, thereby resulting in the production of aromatic compounds. Dealkylation and hydrocracking are usually undesirable due to the low value of the resulting light hydrocarbon products.

[0077] The boron SSZ-113 catalyst used in the reforming reaction will often include a Group VIII metal such as platinum or palladium, or a Group VIII metal plus a second catalytic metal that acts as a promoter. Examples of metals that can be used as promoters include rhenium, tin, tungsten, germanium, cobalt, nickel, rhodium, ruthenium, iridium, or combinations thereof. The one or more catalytic metals can be dispersed on a support such as alumina, silica, or silica-alumina.

[0078] Boron SSZ-113 reforming catalyst can be used in the form of pill, pellet, granule, fragment or various special shapes, arranged as fixed bed in the reaction zone, and the charge can be liquid phase, gas phase or mixed phase and flow through upward, downward or radially. Alternatively, the reforming catalyst can be used in a moving bed or fluidized solid process, wherein the charge passes upward through a turbulent bed of finely divided catalyst. However, a fixed bed system or a dense phase moving bed system is preferred due to less catalyst loss and other operational advantages. In a fixed bed system, the feed (by any suitable heating device) is preheated to the desired reaction temperature and then passed into the reaction zone of the fixed bed containing the catalyst. The reaction zone can be one or more separate reactors, which have suitable devices to maintain the desired temperature at the reactor inlet. The temperature must be maintained because the reforming reaction is typically endothermic in nature.

[0079] The actual reforming conditions will often depend, at least in part, on the feed used (whether highly aromatic, paraffinic, or naphthenic), and the desired octane rating of the product and the desired hydrogen production. Example

[0080] The following illustrative examples are intended to be non-limiting.

[0081] Example 1

[0082] To the tared 23 ml reactor Teflon cup was added 5 mM SDA 1,3-bis(2,3-dimethyl-1H-imidazole ) propane dihydroxide solution. Then 0.54 grams of Tosoh HUA-390FAU zeolite (SAR~250), 0.10 grams of GeO2 and 0.06 grams of H3BO3 (boric acid) were added. After evaporation in the hood for several days to reduce the H2O / TO2 ratio to 7, the reaction was added with 0.20 grams of 50% HF and then sealed and heated at 160°C with a rotation of 43RPM for 7 days. After cooling and collecting samples from filtration and washing, XRD data showed boron-containing SSZ-113, which has the characteristic peaks of Table 3.

[0083] The as-prepared borogermanosilicate SSZ-113 can then be calcined in air to 540°C using a temperature program of 1°C to 120°C / min for 2 hours / 1°C / min to 540°C / for 4 hours and furnace cooled.

[0084] The XRD pattern remained essentially unchanged.

[0085]

[0086] Example 2

[0087] Platinum Addition

[0088] 2.68 grams of calcined borogermanium SSZ-113 from Example 1 was dispersed in 64 grams of water and then mixed in 0.05 grams of tetraamine platinum chloride hydrate and the solution was stirred at room temperature for 24 hours. The solid was then collected, dried and calcined in air to 300°C (3 hours at temperature) and then granulated and sieved to 24 / 40 chips and charged to the reactor.

[0089] Example 3

[0090] Pretreatment of Catalytic Naphtha Reforming Catalysts

[0091] The catalytic naphtha reforming catalyst prepared in Example 2 was sulfurized. The sulfurization reaction was carried out in a downflow fixed bed reactor system. The process is described as follows:

[0092] The catalyst was sieved to 24-40 chips and then loaded into the center of a stainless steel tubular reactor. The catalyst (0.53 g dry weight as determined by TGA (thermogravimetric analysis) at 1112°F) was first dried in a N2 stream (300 ml / min) at a heating rate of 10°F / min from room temperature to 400°F and held at 400°F for 30 minutes. To reduce the platinum in the catalyst, the catalyst was then heated in a H2 stream (300 ml / min) at a heating rate of 5°F / min from 400°F to 900°F and held at 900°F for 30 minutes. Finally, the catalyst was cooled down to 800°F to start the sulfidation reaction.

[0093] The feed applied for the sulfurization reaction is anhydrous n-octane containing 200ppm sulfur (as dimethyl disulfide).Sulfidation was carried out for 60 minutes at 800°F and atmospheric pressure.H2 and liquid feed flow rate are 30ml / min and 0.43ml / min respectively.After sulfurization, the catalyst is heated from 800 to 900°F in a few minutes in H2 stream (300ml / min) and then heated at 900°F for another 30 minutes to remove the excessive sulfur substances blocked in the hole and / or on the surface of the catalyst.Finally, the catalyst is heated and raised or cooled to the pre-set reaction temperature (e.g. 850 or 950°F) in 2 hours in the same H2 stream (300ml / min) to prepare the catalytic naphtha reforming test in the beginning embodiment 4.

[0094] Example 4

[0095] Catalytic Naphtha Reforming Test Process

[0096] Following the sulfidation procedure described in Example 3, the catalytic naphtha reforming reaction was carried out as described below.

[0097] The catalyst was heated up or cooled down to the preset reaction temperature (950°F for Example 6) in the same H2 flow (300 ml / min) over 2 hours to prepare for the start of the catalytic naphtha reforming test in this example (as described in Example 3). At the same time, the reactor system was pressurized to the preset pressure (150 psig for Example 6). At the same time, the H2 flow was adjusted to the preset rate (14 ml / min for Example 6). The feed rate was 1.55 ml / hour (for Example 6).

[0098] In Example 6, a catalytic naphtha reforming experiment was conducted by using the naphtha feed described in Example 5 at a hydrocarbon WHSV of 2.2 and a hydrogen to hydrocarbon molar ratio of 3.0.

[0099] Example 5

[0100] Feed for Catalytic Naphtha Reforming Tests

[0101] GC analysis data from the feed used in the catalytic naphtha reforming tests of the present invention are given in Table 5, together with GC results of its catalytic naphtha reforming test product from Example 6 over the catalysts described in Examples 1 and 2. The GC data were obtained via on-line analysis.

[0102] Example 6

[0103] Products from catalytic naphtha reforming tests

[0104] The GC analysis data for the feed from Example 5 used in the catalytic naphtha reforming tests are given in Table 5, along with the results for its catalytic naphtha reforming test product from this Example over the catalyst described in Example 3. The catalytic naphtha reforming experiments were conducted at 950°F, 150 psig, a hydrocarbon WHSV of 2.2, and a hydrogen to hydrocarbon molar ratio of 3.0.

[0105] The GC results from the feed for the catalytic naphtha reforming test (Example 5) and the product from its catalytic naphtha reforming test (Example 6) over the catalyst described in Example 3 are shown below in Table 5. Reaction Conditions: 950°F, 150 psig, hydrocarbon WHSV of 2.2 and a hydrogen to hydrocarbon molar ratio of 3.0.

[0106] Table 5

[0107]

[0108]

[0109] The products in Table 5 show an increase in aromatics and octane gasoline. Boron SSZ-113 successfully reformed the feedstock of Example 5.

[0110] As used in this disclosure, the words "comprising" or "comprising" are intended to be open ended transitional, meaning the specified elements are included but not necessarily excluding other unspecified elements. The phrases "consisting essentially of" or "consisting essentially of" are intended to mean excluding other elements of any significance to the composition. The phrases "consisting of" or "consisting of" are intended to be transitional, meaning excluding all but the recited elements except for only minor trace impurities.

[0111] All patents and disclosures cited herein are incorporated herein by reference to the extent that they are not inconsistent with this article. It will be understood that some of the above-mentioned structures, functions and operations of the above-mentioned embodiments are not necessary for implementing the present invention, and are included in the description only for the completeness of one or more exemplary embodiments. In addition, it will be understood that the specific structures, functions and operations set forth in the above-mentioned patents and disclosures can be implemented in conjunction with the present invention, but they are not necessary for the implementation of the present invention. It should therefore be understood that the present invention can be implemented in a manner different from the specific description without actually departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. Molecular sieves, in their as-synthesized form, having a powder X-ray diffraction pattern comprising the following peaks: And the molecular sieve contains boron.

2. The molecular sieve according to claim 1, having a composition comprising the following molar relationship: B2O3:(n)TO2 wherein n is ≥ 10; and T is a tetravalent element including silicon and germanium.

3. The molecular sieve according to claim 1, having a composition comprising the following molar relationship: B2O3:(n)TO2 wherein n is ≥ 15; and T is a tetravalent element including silicon and germanium.

4. The molecular sieve according to claim 1, having a chemical composition comprising the following molar relationship: wherein T is a tetravalent element including silicon and germanium; and Q-contains 1,3-bis(2,3-dimethyl-1H-imidazole )Propane dication.

5. The molecular sieve of claim 4 which is sulfided and comprises a Group VI II metal.

6. The molecular sieve of claim 5, wherein the Group VI II metal is platinum or palladium.

7. A method for synthesizing the molecular sieve according to claim 1, the method comprising: (a) providing a reaction mixture comprising: (1) Source of silicon oxide; (2) Source of germanium; (3) Boron source; (4) 1,3-bis(2,3-dimethyl-1H-imidazole ) propane dication (Q); (5) a fluoride ion source; and (6) water; and (b) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the molecular sieve.

8. The method according to claim 7, wherein the reaction mixture has the following composition in terms of molar ratio: Wherein T is a tetravalent element including silicon and germanium.

9. The method according to claim 7, wherein the reaction mixture has the following composition in terms of molar ratio: Wherein T is a tetravalent element including silicon and germanium.

10. The method of claim 7, wherein the silicon oxide source comprises zeolite Y having a SiO2 / Al2O3 ratio of at least 250.

11. The method of claim 7, wherein the crystallization conditions include a temperature of 125°C to 200°C.

12. A method of converting a feedstock comprising an organic compound into a conversion product, the method comprising contacting the feedstock with a catalyst comprising the molecular sieve of claim 5 under organic compound conversion conditions.

13. A method of converting a feedstock comprising an organic compound into a conversion product, the method comprising contacting the feedstock with a catalyst comprising the molecular sieve of claim 6 under organic compound conversion conditions.

14. The method of claim 12, wherein the conversion reaction is reforming.

15. The method of claim 13, wherein the conversion reaction is reforming.

16. A method of ion exchanging metals, the method comprising contacting a stream comprising heavy metals with the molecular sieve of claim 4.

Citation Information

Patent Citations

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