JP2011523619A - 結晶質メタロシリケートの製造方法 - Google Patents
結晶質メタロシリケートの製造方法 Download PDFInfo
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- JP2011523619A JP2011523619A JP2011512040A JP2011512040A JP2011523619A JP 2011523619 A JP2011523619 A JP 2011523619A JP 2011512040 A JP2011512040 A JP 2011512040A JP 2011512040 A JP2011512040 A JP 2011512040A JP 2011523619 A JP2011523619 A JP 2011523619A
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- Prior art keywords
- metallosilicate
- crystalline
- metal
- ratio
- silicon
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 57
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 claims abstract description 43
- 239000002184 metal Substances 0.000 claims abstract description 43
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 43
- 239000010703 silicon Substances 0.000 claims abstract description 43
- 238000002425 crystallisation Methods 0.000 claims abstract description 30
- 230000008025 crystallization Effects 0.000 claims abstract description 30
- 239000002609 medium Substances 0.000 claims abstract description 23
- 239000011541 reaction mixture Substances 0.000 claims abstract description 10
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- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
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- 238000000034 method Methods 0.000 claims description 52
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- 238000006243 chemical reaction Methods 0.000 claims description 35
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 29
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- 239000003054 catalyst Substances 0.000 claims description 23
- 229930195733 hydrocarbon Natural products 0.000 claims description 17
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- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 5
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- 239000003960 organic solvent Substances 0.000 description 5
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- 239000012429 reaction media Substances 0.000 description 5
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 4
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- 238000001354 calcination Methods 0.000 description 3
- 238000004517 catalytic hydrocracking Methods 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
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- 239000001257 hydrogen Substances 0.000 description 3
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- 150000004645 aluminates Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- JYIBXUUINYLWLR-UHFFFAOYSA-N aluminum;calcium;potassium;silicon;sodium;trihydrate Chemical compound O.O.O.[Na].[Al].[Si].[K].[Ca] JYIBXUUINYLWLR-UHFFFAOYSA-N 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 229910001603 clinoptilolite Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 229910001657 ferrierite group Inorganic materials 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 150000002258 gallium Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 150000005826 halohydrocarbons Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical group [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000005211 surface analysis Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 238000005011 time of flight secondary ion mass spectroscopy Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
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- C01B37/00—Compounds having molecular sieve properties but not having base-exchange properties
- C01B37/005—Silicates, i.e. so-called metallosilicalites or metallozeosilites
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- C01—INORGANIC CHEMISTRY
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- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/023—Preparation of physical mixtures or intergrowth products of zeolites chosen from group C01B39/04 or two or more of groups C01B39/14 - C01B39/48
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- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/36—Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- C01B39/38—Type ZSM-5
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- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/36—Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- C01B39/38—Type ZSM-5
- C01B39/40—Type ZSM-5 using at least one organic template directing agent
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- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
- C07C2/864—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms the non-hydrocarbon is an alcohol
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Abstract
【解決手段】(a)OH-アニオンと金属源とを含む水溶性媒体を用意し、(b) 無機珪素源と、任意成分のテンプレート剤とから成る水溶性媒体を用意し、(c) 任意成分の有機珪素源を含む任意成分の非水溶性媒体を用意し、(d) 有効条件下で上記水溶性媒体(a)と(b)と任意成分の(c)とを混合し、(e) 反応混合物(a)+(b)+(c)を室温まで冷却し、(f) 反応混合物のpHを少なくとも0.1だけ下げ、(g) 段階(f)で得られた混合物をメタロシリケートの所望結晶化を続けるのに有利な条件とし、(h) 所望のメタロシリケートを回収する。結晶化前の混合物(a)+(b)+(c)中のSi有機/Si無機の比は<0.3、OH-/SiO2のモル比は少なくとも0.3。
Description
(b) 上記の二相液体媒体から結晶質メタロシリケート組成物を結晶させる。
(b) 水相から結晶質メタロシリケート組成物を結晶化させる。この結晶化段階は第1段階に続いて第2の段階を実施し、水相中の少なくとも一種の珪素含有化合物の濃度を第2段階で増加させる。
下記(a)〜(h)の段階:
(a) OH-アニオンと金属源とを含む水溶性媒体を用意し、
(b) 無機珪素源と、任意成分のテンプレート剤(ひな型剤)とから成る水溶性媒体を用意し、
(c) 任意成分の有機珪素源を含む任意成分の非水溶性媒体を用意し、
(d) 所望の結晶質メタロシリケートを部分的に結晶化させるのに有効な条件下で上記水溶性媒体(a)と(b)と任意成分の(c)とを混合し、
(e) 反応混合物(a)+(b)+(c)を室温まで冷却し、
(f) 反応混合物のpHを少なくとも0.1だけ、好ましくは0.3〜4だけ、さらに好ましくは0.5〜3だけ下げ、
(g) 段階(f)で得られた混合物をメタロシリケートの所望結晶化を続けるのに有利な条件とし、
(h) 所望のメタロシリケートを回収する、
から成り、結晶化前の上記混合物(a)+(b)+(c)中のSi有機/Si無機の比が<0.3、好ましくは<0.2、さらに好ましくは0で、OH-/SiO2のモル比が少なくとも0.3、好ましくは0.3〜0.62、さらに好ましくは0.32〜0.61、より好ましくは0.33〜0.6であることを特徴とする方法を提供する。
本発明のメタロシリケートは、気孔構造形状の選択性規制 (shape-selective constraints) を受ける内部気孔に比べて表面の活性が低い。
無機珪素源はテトラアルキルおるとシエケートであるのが好ましい。
メタロシリケートはガロシリケート(gallosilicate)で、ガリウム源は水溶性ガリウム塩であるのが好ましい。
"Atlas of Zeolite Structure Types", eds. W. H. Meier, D. H. Olson and Ch. Baerlocher, Elsevier, Fourth Edition, 1996
"Verified synthesis of zeolytic materials, eds H. Robson, Elsevier 2001
「本発明のメタロシリケート」とは本発明の方法で作ったメタロシリケートおよび/または上記で生成物自体として記載したメタロシリケートを意味する。この種の方法の例としては下記が挙げられるが、これらに限定ささるものではない。
代表的な反応条件は約450℃〜約650℃の温度と、大気圧から約8バールの圧力と、約5hr-1〜約50hr-1の重量空間速度である。
以下、本発明の実施例を説明するが、本発明が下記実施例に限定されるものではない。
X−線回折で回折パターンを得て、所望の結晶構造を確認し、また、未知の結晶相の存在を検出し、基準ゼオライトと比較して結晶化度を決定した。回折計はフィリップスPW1830(Co Ka)である。
スパッターリングガンで200×200ミクロンの表面積を浸食し、表面解析ガンで約5×5ミクロンの表面積を走査した。プロフィルはノンインタレースモードで実行した。すなわち、サンプルの解析とスパッターリングとは完全に分離した。サイクルは30秒間解析−30秒間スパッターリング−2秒間休止のシーケンスである。ゼオライト粉末を圧密し、ウエハース中へ押込み、ウエハースを支持体に固定し、10-6〜10-7トールに減圧下に置いた。24時間脱ガスした後に解析を実行した。濃度断面プロフィルではアルミニウムと珪素の単原子種だけを考慮し、定量測定(Si2+/Al2+)では二重荷電カチオンだけを考慮した。較正は周知のSi/Al比を有するゼオライトで行った。この解析条件下での検量線は次の式に応答する:
フレーム中のSi/Al= 2.1008Si2+/Al2+(SIMSによる)
エロージョン速度はプロフィルメータで測定し、それは0.17ナノメートル/秒に対応した。
溶液(a):
xxx mlの蒸留水中にxxx gの水酸化ナトリウムと、xxx gのAI(NO3)3.9H2Oを混合し、15分間均質化した([表2])。
溶液(b):
xxx mlの蒸留水中にxxx gのテンプレート(ひな型)と、40重量%のSiO2(Ludox AS−40)を含んだxxx mlのコロイドシリカ溶液([表2])。
溶液(c):
xxx mlのヘキサノール−1([表2])
サンプル2と3の反応媒体は室温まで冷却し、1M H2SO4溶液を加えてpHを2だけ下げた([表2][表3])。
第2の合成は自己発生圧力下に170℃で16時間、マイクロ波加熱処理して実施した。
サンプル5〜7の反応媒体は室温まで冷却し、1M H2SO4溶液を加えてpHを2だけ下げた([表2][表3])。
第2の合成は自己発生圧力下に170℃で21時間、マイクロ波加熱処理して実施した。
サンプル8の反応媒体は室温まで冷却し、0.05M Na2CO3/NaHCO3を含む緩衝液を加えて、pHを下げた([表2][表3])。
第2の合成は自己発生圧力下に170℃で21時間、マイクロ波加熱処理して実施した。
Si/Alは下記の図に示した。
[図1](実施例1〜3)
[図2](実施例4〜6)、
[図3](実施例7)
[図4](実施例8)
XDRパターン
[図5](実施例1〜5)
[図6](実施例4〜6)
[図7](実施例7)
[図8](実施例8)
SEM像
[図9](実施例1〜3)
サンプル2および3では粉末収率が74.98(実施例1)から90.64%および93.10への増加し、サンプル5および6では73.19%(実施例4)からそれぞれ90.32%および84.48%へ増加した。
結晶化度および相組成も同じである([図5]〜[図8])。
SIMSプロフィルは、2段合成の場合に1段合成よりも勾配すなわちSi/Al表面/Si/Alバルク比が増加した([図1][図2])。
[図3][図4]はこの処方が低Si/Al比を有するサンプルにも適用でき、良好な結果を与えることを証明している。
三つの異なるゼオライトサンプルでトルエン反応のメチル化を評価した。
各サンプルの特性は下記の[表4]にまとめて示した。
サンプルAおよびサンプルBは酸部位が均一に分布した標準的なMFIゼオライトである(結晶のコアと外側層で珪素/アルミニウム比が同じ)。
サンプルCは本発明の実施例3で合成したもので、結晶に沿って優れた珪素/アルミニウム比分布プロフィルを示している(結晶コアでの珪素/アルミニウム比は84、外側層では701)
トルエンのメチル化を50mgの触媒を用いて300℃で実行した。N2/試薬のモル比は4.50を使用し、トルエン/メタノール比は2を使用し、WHSVは変化させた(1〜16h-1)。CP−WAX 52CB 25mカラムを使用し、下記の昇温プログラムを用いて解析した:60から85まで5℃/分で加熱、その後、175℃まで15℃/分で加熱。
サンプルCはサンプルAおよびBと比較してトルエン変換率が高い時にパラキシレン選択性が高い。これはパラキシレンの選択においてアルミニウムの濃度勾配が遊離な影響を与えることを明確に示している。
Claims (19)
- 内側部分(コア)および外側部分(シェルまたは外側層)とを有し、Si/金属の比が内側部分より外側部分の方が高いクリスタライトから成り、このクリスタライトの結晶横断面で金属および珪素が連続的に分布している結晶メタロシリケート組成物の製造方法において、
下記(a)〜(h)の段階:
(a) OH-アニオンと金属源とを含む水溶性媒体を用意し、
(b) 無機珪素源と、任意成分のテンプレート剤とから成る水溶性媒体を用意し、
(c) 任意成分の有機珪素源を含む任意成分の非水溶性媒体を用意し、
(d) 所望の結晶質メタロシリケートを部分的に結晶化させるのに有効な条件下で上記水溶性媒体(a)と(b)と任意成分の(c)とを混合し、
(e) 反応混合物(a)+(b)+(c)を室温まで冷却し、
(f) 反応混合物のpHを少なくとも0.1だけ下げ、
(g) 段階(f)で得られた混合物をメタロシリケートの所望結晶化を続けるのに有利な条件とし、
(h) 所望のメタロシリケートを回収する、
から成り、結晶化前の上記混合物(a)+(b)+(c)中のSi有機/Si無機の比が<0.3で、OH-/SiO2のモル比が少なくとも0.3であることを特徴とする方法。 - Si有機/Si無機の比が<0.2である請求項1に記載の方法。
- Si有機/Si無機の比が0である請求項2に記載の方法。
- 段階(f)でpHを少なくとも0.3〜4だけ下げる請求項1〜3のいずれか一項に記載の方法。
- pHの減少が0.5〜3である請求項4に記載の方法。
- 段階(d)での上記混合物(a)+(b)+(c)中のOH-/SiO2のモル比が0.31〜0.61である請求項1〜5のいずれか一項に記載の方法。
- メタロシリケートがアルミノ珪酸塩である請求項1〜6のいずれか一項に記載の方法。
- メタロシリケートがMFIである請求項1〜7のいずれか一項に記載の方法。
- メタロシリケートがMEL、MTT、MFS、HEU、FER、TON、LTLおよびMAZの中から選択される請求項1〜8のいずれか一項に記載の方法。
- 結晶化の前に(a)+(b)+(c)の混合物のpHを13以上にする請求項1〜9のいずれか一項に記載の方法。
- pHを13.1以上にする請求項10に記載の方法。
- pHが13.2以上にする請求項10に記載の方法。
- 無機珪素源を沈殿シリカ、火成シリカ(またはヒュームドシリカ)およびシリカの水溶性コロイド懸濁液の少なくとも一つの中から選択する請求項1〜12のいずれか一項に記載の方法。
- 先ず最初に(b)と(c)の水溶性媒体を混合し、その後に(b)+(c)の混合物中にヒドロゲルが得られるまで(a)の水溶性媒体をゆっくり加える請求項1〜13のいずれか一項に記載の方法。
- 請求項1〜14のいずれか一項に記載の方法で得られた結晶質メタロシリケート組成物の、炭化水素転換プロセスでの触媒成分としての使用。
- 炭化水素転換プロセスがトルエンをメタノールでアルキル化してキシレンを作る方法である請求項15に記載の使用。
- 外側表面から下に約10ナノメートルの深さの結晶質外側表面層と、約50ナノメートルの深さで外側表面から内側へ延びた内側部分とを有するクリスタライトから成る結晶質メタロシリケート組成物であって、この結晶質メタロシリケート組成物中の金属に対する珪素の原子比が内側部分と比較して外側表面層の方が好ましくは少なくとも1.5倍である結晶質メタロシリケート組成物の、トルエンをメタノールでアルキル化してキシレンを作る触媒としての使用。
- 外側表面から下に約10ナノメートルの深さの結晶質外側表面層と、約50ナノメートルの深さで外側表面から内側へ延びた内側部分とを有するクリスタライトから成る結晶質メタロシリケート組成物であって、この結晶質メタロシリケート組成物中の金属に対する珪素の原子比が内側部分と比較して外側表面層の方が好ましくは少なくとも1.5倍である結晶質メタロシリケート組成物。
- 結晶質メタロシリケート組成物中の金属に対する珪素の原子比が内側部分と比較して外側表面層の方が1.5〜15倍である請求項18に記載の結晶メタロシリケート組成物。
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WO2013147261A1 (ja) * | 2012-03-30 | 2013-10-03 | Jx日鉱日石エネルギー株式会社 | シリケート被覆MFI型ゼオライトとその製造方法およびそれを用いたp-キシレンの製造方法 |
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KR20130017165A (ko) * | 2011-08-10 | 2013-02-20 | 서강대학교산학협력단 | 제올라이트 코어/실리카 제올라이트 쉘 복합체, 그의 제조 방법 및 그의 촉매적 용도 |
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US9186659B2 (en) * | 2014-01-09 | 2015-11-17 | King Fahd University Of Petroleum And Minerals | Controlled growth of MTT zeolite by microwave-assisted hydrothermal synthesis |
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US10843930B1 (en) * | 2019-11-13 | 2020-11-24 | Saudi Arabian Oil Company | Systems and methods for synthesis of ZSM-22 zeolite |
CN114247466B (zh) * | 2021-12-02 | 2022-12-20 | 厦门大学 | 一种处理VOCs的低温等离子体协同催化剂及其制备方法和应用 |
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