JP4937254B2 - 分子篩の性能向上 - Google Patents
分子篩の性能向上 Download PDFInfo
- Publication number
- JP4937254B2 JP4937254B2 JP2008519363A JP2008519363A JP4937254B2 JP 4937254 B2 JP4937254 B2 JP 4937254B2 JP 2008519363 A JP2008519363 A JP 2008519363A JP 2008519363 A JP2008519363 A JP 2008519363A JP 4937254 B2 JP4937254 B2 JP 4937254B2
- Authority
- JP
- Japan
- Prior art keywords
- molecular sieve
- metallo
- aluminophosphate molecular
- silica
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- B01J29/82—Phosphates
- B01J29/84—Aluminophosphates containing other elements, e.g. metals, boron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/005—Mixtures of molecular sieves comprising at least one molecular sieve which is not an aluminosilicate zeolite, e.g. from groups B01J29/03 - B01J29/049 or B01J29/82 - B01J29/89
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/82—Phosphates
- B01J29/84—Aluminophosphates containing other elements, e.g. metals, boron
- B01J29/85—Silicoaluminophosphates (SAPO compounds)
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/54—Phosphates, e.g. APO or SAPO compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
-
- 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
- B01J2229/60—Synthesis on support
- B01J2229/62—Synthesis on support in or on other molecular sieves
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
- C07C2521/02—Boron or aluminium; Oxides or hydroxides thereof
- C07C2521/04—Alumina
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
- C07C2521/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- C07C2521/08—Silica
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
- C07C2521/12—Silica and alumina
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2529/00—Catalysts comprising molecular sieves
- C07C2529/82—Phosphates
- C07C2529/84—Aluminophosphates containing other elements, e.g. metals, boron
- C07C2529/85—Silicoaluminophosphates (SAPO compounds)
-
- 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
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
-
- 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
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/40—Ethylene production
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
(ELxAlyPz)O2
式中、ELは、ケイ素、マグネシウム、亜鉛、鉄、コバルト、ニッケル、マンガン、クロムおよびこれらの混合からなる群から選択される金属であり、「x」はELのモル分率であり、少なくとも0.005の値を有し、「y」はAlのモル分率であり、少なくとも0.01の値を有し、「z」はPのモル分率であり、少なくとも0.01の値を有し、x+y+z=1である。ELが金属の混合物である場合、「x」は存在する金属混合物の全量を表す。好ましい金属(EL)はケイ素、マグネシウムおよびコバルトであり、ケイ素が特に好ましい。本発明の分子篩は、金属含量が、最終の分子篩生成物に存在する金属含量よりも大きい種物質を用いて製造される。種物質は5から20wt%の金属、好ましくは8から15wt%の金属、最も好ましくは10から15wt%の金属を含む。より低レベルの金属含量が、分子篩生成物を調製するために用いられる他の成分において見出される。これらの他の成分は、1から5wt%の金属、好ましくは2から4wt%の金属を含む。
さらに、立方体状であっても、交差する板(異なる<100>面に沿う積層欠陥を有する)からなっていても、より立体的な形態はMTO反応における選択性に有益であることが見出された。
これらの要因は、Si/(Al+P)の大きな比が、MTO法に使用されるSAPO−34に望ましいであろうということを示す。残念ながら、シリカレベルを増大させると触媒の酸性度を増し、これは、触媒をコーキングにより失活し易くし得る。
Claims (8)
- メタロ−アルミノホスフェート分子篩を調製する方法であって、
a)乾燥酸化物を基準にして5から20wt%のSiO2を含む量の種結晶、アルミニウム源、リン源、少なくとも1種の有機鋳型、およびシリカ源を含む反応混合物を最初に準備すること;
b)前記反応混合物からのメタロ−アルミノホスフェート分子篩の結晶生成を誘発させること;および
c)前記の結晶化したメタロ−アルミノホスフェート分子篩を分離すること;
を含み、
前記結晶化したメタロ−アルミノホスフェート分子篩が1から5wt%の間のシリカを含む、方法。 - 前記メタロ−アルミノホスフェート分子篩が、CHA骨格構造型、AEI骨格構造型、CHAおよびAEI骨格構造型の相互成長、またはこれらの骨格構造型の少なくとも2つの混合物を有する、請求項1に記載の方法。
- 前記種結晶が8から15wt%の金属酸化物を含む、請求項1に記載の方法。
- a)請求項1に従って調製された分子篩の存在下で反応器系統に原料を導入すること;
b)前記反応器系統から流出物の流れを取り出すこと;および
c)前記流出物の流れを回収系統に通し、少なくとも1種または複数の転化生成物を回収すること;
を含む、炭化水素の転化方法。 - 前記原料が1種または複数の含酸素化合物を含む、請求項4に記載の方法。
- 結晶性メタロ−アルミノホスフェート分子篩を含む触媒であって、前記結晶性メタロ−アルミノホスフェート分子篩の第1部分が5から20wt%のシリカを含み、前記結晶性メタロ−アルミノホスフェート分子篩の第2部分が1から5wt%のシリカを含む触媒。
- 前記結晶性メタロ−アルミノホスフェート分子篩の第1部分が8から15wt%のシリカを含み、前記結晶性メタロ−アルミノホスフェート分子篩の第2部分が2から4wt%のシリカを含む、請求項6に記載の触媒。
- 前記結晶性メタロ−アルミノホスフェート分子篩がSAPO−34の結晶構造を有する、請求項6または7に記載の触媒。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/171,801 US7547812B2 (en) | 2005-06-30 | 2005-06-30 | Enhancement of molecular sieve performance |
US11/171,801 | 2005-06-30 | ||
PCT/US2006/023734 WO2007005250A2 (en) | 2005-06-30 | 2006-06-19 | Enhancement of molecular sieve performance |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008544941A JP2008544941A (ja) | 2008-12-11 |
JP4937254B2 true JP4937254B2 (ja) | 2012-05-23 |
Family
ID=37590555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008519363A Expired - Fee Related JP4937254B2 (ja) | 2005-06-30 | 2006-06-19 | 分子篩の性能向上 |
Country Status (19)
Country | Link |
---|---|
US (4) | US7547812B2 (ja) |
EP (1) | EP1896179B1 (ja) |
JP (1) | JP4937254B2 (ja) |
KR (1) | KR100961240B1 (ja) |
CN (1) | CN101213016B (ja) |
AR (1) | AR055068A1 (ja) |
AT (1) | ATE480328T1 (ja) |
AU (1) | AU2006266289B2 (ja) |
BR (1) | BRPI0613496A2 (ja) |
CA (1) | CA2613052C (ja) |
DE (1) | DE602006016794D1 (ja) |
ES (1) | ES2350649T3 (ja) |
MX (1) | MX2008000164A (ja) |
MY (1) | MY145154A (ja) |
RU (1) | RU2365410C1 (ja) |
SA (1) | SA06270263B1 (ja) |
TW (1) | TWI424881B (ja) |
WO (1) | WO2007005250A2 (ja) |
ZA (1) | ZA200800312B (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7547812B2 (en) * | 2005-06-30 | 2009-06-16 | Uop Llc | Enhancement of molecular sieve performance |
WO2007100418A1 (en) * | 2006-02-27 | 2007-09-07 | Exxonmobil Chemical Patents Inc. | Method of making and process for using molecular sieve catalyst |
WO2010084930A1 (ja) * | 2009-01-22 | 2010-07-29 | 三菱化学株式会社 | 窒素酸化物浄化用触媒及びその製造方法 |
JP5756461B2 (ja) | 2009-06-12 | 2015-07-29 | アルベマール・ユーロプ・エスピーアールエル | Sapo分子篩触媒と、その調製および使用 |
KR101193973B1 (ko) | 2009-10-22 | 2012-10-24 | 현대엔지니어링 주식회사 | 고강도를 갖는 sapo-34 미소구형체 촉매, 이의 제조방법 및 이를 이용한 경질올레핀의 제조방법 |
JP5892764B2 (ja) * | 2010-12-16 | 2016-03-23 | 日揮触媒化成株式会社 | 結晶性シリコアルミノリン酸塩成型体およびその製造方法 |
KR20140053240A (ko) * | 2011-07-27 | 2014-05-07 | 존슨 맛쎄이 퍼블릭 리미티드 컴파니 | 저인 카바자이트 |
RU2505356C2 (ru) * | 2011-12-27 | 2014-01-27 | Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт нефтехимического синтеза им. А.В. Топчиева Российской академии наук (ИНХС РАН) | Способ получения катализатора и способ синтеза олефинов c2-c4 в присутствии катализатора, полученного этим способом |
US9211530B2 (en) | 2012-12-14 | 2015-12-15 | Uop Llc | Low silicon SAPO-42 and method of making |
US8884056B2 (en) | 2012-12-14 | 2014-11-11 | Uop Llc | Anaerobic conversion of 4-carboxybenzaldehyde in ionic liquids |
JP6513652B2 (ja) * | 2013-10-31 | 2019-05-15 | ジョンソン、マッセイ、パブリック、リミテッド、カンパニーJohnson Matthey Public Limited Company | Aeiゼオライトの合成 |
CN107074571B (zh) | 2014-08-22 | 2022-09-27 | 格雷斯公司 | 使用一异丙醇胺合成磷酸硅铝-34分子筛的方法 |
JP2016098149A (ja) * | 2014-11-21 | 2016-05-30 | 三菱化学株式会社 | Aei型ゼオライトの製造方法 |
CN111115655B (zh) * | 2018-10-30 | 2022-07-12 | 中国石油化工股份有限公司 | 共晶纳米分子筛、制备方法及其应用 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4440871A (en) * | 1982-07-26 | 1984-04-03 | Union Carbide Corporation | Crystalline silicoaluminophosphates |
US4499327A (en) * | 1982-10-04 | 1985-02-12 | Union Carbide Corporation | Production of light olefins |
US4861743A (en) | 1987-11-25 | 1989-08-29 | Uop | Process for the production of molecular sieves |
JPH0676203B2 (ja) * | 1988-11-30 | 1994-09-28 | ユニオン、カーバイト、コーポレーション | 微孔性結晶複合組成物及びその製造方法 |
FR2645141B1 (fr) * | 1989-03-31 | 1992-05-29 | Elf France | Procede de synthese de precurseurs de tamis moleculaires du type silicoaluminophosphate, precurseurs obtenus et leur application a l'obtention desdits tamis moleculaires |
US5248647A (en) * | 1991-02-28 | 1993-09-28 | Uop | Sapo catalysts and use thereof in methanol conversion processes |
US5126308A (en) * | 1991-11-13 | 1992-06-30 | Uop | Metal aluminophosphate catalyst for converting methanol to light olefins |
US5888921A (en) * | 1995-10-25 | 1999-03-30 | Abb Lummus Global Inc. | Binary molecular sieves having a core and shell of different structures and compositions |
US5912393A (en) * | 1997-12-09 | 1999-06-15 | Uop Llc | Metallo aluminophosphate molecular sieve with novel crystal morphology and methanol to olefin process using the sieve |
DE69906545T2 (de) * | 1998-07-29 | 2004-03-04 | Exxonmobil Chemical Patents Inc., Baytown | Kristalline molekularsiebe |
DE60039361D1 (de) | 2000-12-13 | 2008-08-14 | Uop Llc | Metallaluminophosphat als Molekularsieb mit der Morphologie eines kubischen Kristalls und Verfahren für die Umwandlung von Methanol in Olefin unter Verwendung der Molekularsieb |
US6953767B2 (en) * | 2001-03-01 | 2005-10-11 | Exxonmobil Chemical Patents Inc. | Silicoaluminophosphate molecular sieve |
EA004900B1 (ru) | 2001-03-22 | 2004-08-26 | Юоп Ллк | Металлоалюмофосфатное молекулярное сито с кубической морфологией кристаллов и способ превращения метанола в олефины с использованием этого сита |
US6793901B2 (en) * | 2002-06-12 | 2004-09-21 | Exxonmobil Chemical Patents, Inc. | Synthesis of molecular sieves having the CHA framework type |
US6620983B1 (en) * | 2002-06-12 | 2003-09-16 | Exxonmobil Chemical Patents Inc. | Synthesis of aluminophosphates and silicoaluminophosphates |
US7375050B2 (en) * | 2003-04-28 | 2008-05-20 | Exxonmobil Chemical Patents Inc. | Synthesis and use of aluminophosphates and silicoaluminophosphates |
US7241716B2 (en) * | 2003-11-10 | 2007-07-10 | Exxonmobil Chemical Patents Inc. | Protecting catalytic sites of metalloaluminophosphate molecular sieves |
JP4990145B2 (ja) * | 2004-10-01 | 2012-08-01 | エクソンモービル・ケミカル・パテンツ・インク | アルミノホスフェートモレキュラーシーブ、その合成及び使用 |
US7518026B2 (en) | 2004-10-01 | 2009-04-14 | Exxonmobil Chemical Patents Inc. | Catalyst and process for the conversion of oxygenates to olefins |
US7079962B2 (en) * | 2004-10-20 | 2006-07-18 | Itron, Inc. | Automated utility meter reading system with variable bandwidth receiver |
US7547812B2 (en) * | 2005-06-30 | 2009-06-16 | Uop Llc | Enhancement of molecular sieve performance |
-
2005
- 2005-06-30 US US11/171,801 patent/US7547812B2/en not_active Expired - Fee Related
-
2006
- 2006-06-19 AU AU2006266289A patent/AU2006266289B2/en not_active Ceased
- 2006-06-19 CA CA2613052A patent/CA2613052C/en not_active Expired - Fee Related
- 2006-06-19 RU RU2008103352/04A patent/RU2365410C1/ru not_active IP Right Cessation
- 2006-06-19 BR BRPI0613496-3A patent/BRPI0613496A2/pt not_active Application Discontinuation
- 2006-06-19 AT AT06785077T patent/ATE480328T1/de not_active IP Right Cessation
- 2006-06-19 EP EP06785077A patent/EP1896179B1/en not_active Not-in-force
- 2006-06-19 MX MX2008000164A patent/MX2008000164A/es active IP Right Grant
- 2006-06-19 KR KR1020087001824A patent/KR100961240B1/ko not_active IP Right Cessation
- 2006-06-19 WO PCT/US2006/023734 patent/WO2007005250A2/en active Search and Examination
- 2006-06-19 JP JP2008519363A patent/JP4937254B2/ja not_active Expired - Fee Related
- 2006-06-19 ES ES06785077T patent/ES2350649T3/es active Active
- 2006-06-19 CN CN2006800234915A patent/CN101213016B/zh active Active
- 2006-06-19 ZA ZA200800312A patent/ZA200800312B/xx unknown
- 2006-06-19 DE DE602006016794T patent/DE602006016794D1/de active Active
- 2006-06-21 MY MYPI20062935A patent/MY145154A/en unknown
- 2006-06-28 AR ARP060102779A patent/AR055068A1/es active IP Right Grant
- 2006-06-29 TW TW095123571A patent/TWI424881B/zh not_active IP Right Cessation
- 2006-08-08 SA SA06270263A patent/SA06270263B1/ar unknown
-
2009
- 2009-04-28 US US12/431,269 patent/US7977273B2/en active Active
- 2009-04-28 US US12/431,297 patent/US7972989B2/en active Active
- 2009-04-28 US US12/431,284 patent/US7973208B2/en active Active
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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LAPS | Cancellation because of no payment of annual fees |