BR112014006964A2 - catalisador de hidrogenação e desidrogenação, e processos de fabricação e uso do mesmo - Google Patents

catalisador de hidrogenação e desidrogenação, e processos de fabricação e uso do mesmo

Info

Publication number
BR112014006964A2
BR112014006964A2 BR112014006964A BR112014006964A BR112014006964A2 BR 112014006964 A2 BR112014006964 A2 BR 112014006964A2 BR 112014006964 A BR112014006964 A BR 112014006964A BR 112014006964 A BR112014006964 A BR 112014006964A BR 112014006964 A2 BR112014006964 A2 BR 112014006964A2
Authority
BR
Brazil
Prior art keywords
hydrogenation
manufacture
processes
dehydrogenation catalyst
dehydrogenation
Prior art date
Application number
BR112014006964A
Other languages
English (en)
Other versions
BR112014006964B1 (pt
Inventor
Spasyuk Denis
Goussev Dmitri
Original Assignee
Spasyuk Denis
Goussev Dmitri
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Spasyuk Denis, Goussev Dmitri filed Critical Spasyuk Denis
Publication of BR112014006964A2 publication Critical patent/BR112014006964A2/pt
Publication of BR112014006964B1 publication Critical patent/BR112014006964B1/pt

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/24Phosphines, i.e. phosphorus bonded to only carbon atoms, or to both carbon and hydrogen atoms, including e.g. sp2-hybridised phosphorus compounds such as phosphabenzene, phosphole or anionic phospholide ligands
    • B01J31/2404Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring
    • B01J31/2442Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring comprising condensed ring systems
    • B01J31/2461Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring comprising condensed ring systems and phosphine-P atoms as ring members in the condensed ring system or in a further ring
    • B01J31/2471Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring comprising condensed ring systems and phosphine-P atoms as ring members in the condensed ring system or in a further ring with more than one complexing phosphine-P atom
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/20Carbonyls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/22Organic complexes
    • B01J31/2282Unsaturated compounds used as ligands
    • B01J31/2295Cyclic compounds, e.g. cyclopentadienyls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/24Phosphines, i.e. phosphorus bonded to only carbon atoms, or to both carbon and hydrogen atoms, including e.g. sp2-hybridised phosphorus compounds such as phosphabenzene, phosphole or anionic phospholide ligands
    • B01J31/2404Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/24Phosphines, i.e. phosphorus bonded to only carbon atoms, or to both carbon and hydrogen atoms, including e.g. sp2-hybridised phosphorus compounds such as phosphabenzene, phosphole or anionic phospholide ligands
    • B01J31/2404Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring
    • B01J31/2442Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring comprising condensed ring systems
    • B01J31/2461Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring comprising condensed ring systems and phosphine-P atoms as ring members in the condensed ring system or in a further ring
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07BGENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B31/00Reduction in general
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/68Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton
    • C07C209/70Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton by reduction of unsaturated amines
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/132Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
    • C07C29/136Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH
    • C07C29/147Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of carboxylic acids or derivatives thereof
    • C07C29/149Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of carboxylic acids or derivatives thereof with hydrogen or hydrogen-containing gases
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C41/00Preparation of ethers; Preparation of compounds having groups, groups or groups
    • C07C41/01Preparation of ethers
    • C07C41/18Preparation of ethers by reactions not forming ether-oxygen bonds
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F15/00Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • C07F15/0006Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
    • C07F15/002Osmium compounds
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F15/00Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • C07F15/0006Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
    • C07F15/0046Ruthenium compounds
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F15/00Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • C07F15/0006Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
    • C07F15/0046Ruthenium compounds
    • C07F15/0053Ruthenium compounds without a metal-carbon linkage
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02Phosphorus compounds
    • C07F9/547Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
    • C07F9/553Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having one nitrogen atom as the only ring hetero atom
    • C07F9/576Six-membered rings
    • C07F9/58Pyridine rings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2231/00Catalytic reactions performed with catalysts classified in B01J31/00
    • B01J2231/70Oxidation reactions, e.g. epoxidation, (di)hydroxylation, dehydrogenation and analogues
    • B01J2231/76Dehydrogenation
    • B01J2231/763Dehydrogenation of -CH-XH (X= O, NH/N, S) to -C=X or -CX triple bond species
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/02Compositional aspects of complexes used, e.g. polynuclearity
    • B01J2531/0202Polynuclearity
    • B01J2531/0205Bi- or polynuclear complexes, i.e. comprising two or more metal coordination centres, without metal-metal bonds, e.g. Cp(Lx)Zr-imidazole-Zr(Lx)Cp
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/02Compositional aspects of complexes used, e.g. polynuclearity
    • B01J2531/0238Complexes comprising multidentate ligands, i.e. more than 2 ionic or coordinative bonds from the central metal to the ligand, the latter having at least two donor atoms, e.g. N, O, S, P
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80Complexes comprising metals of Group VIII as the central metal
    • B01J2531/82Metals of the platinum group
    • B01J2531/821Ruthenium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80Complexes comprising metals of Group VIII as the central metal
    • B01J2531/82Metals of the platinum group
    • B01J2531/825Osmium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/18Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
    • B01J31/189Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms containing both nitrogen and phosphorus as complexing atoms, including e.g. phosphino moieties, in one at least bidentate or bridging ligand
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/36Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Hydrogen, Water And Hydrids (AREA)
  • Pyridine Compounds (AREA)
BR112014006964-6A 2011-08-18 2012-08-20 compostos, seus complexos, processos para desidrogenação, para hidrogenação de um substrato e para produção de h2 BR112014006964B1 (pt)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US201161524815P 2011-08-18 2011-08-18
US61/524.815 2011-08-18
US201261593840P 2012-02-01 2012-02-01
US61/593.840 2012-02-01
PCT/CA2012/050571 WO2013023307A1 (en) 2011-08-18 2012-08-20 Hydrogenation and dehydrogenation catalyst, and methods of making and using the same

Publications (2)

Publication Number Publication Date
BR112014006964A2 true BR112014006964A2 (pt) 2017-06-13
BR112014006964B1 BR112014006964B1 (pt) 2020-11-17

Family

ID=47714662

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112014006964-6A BR112014006964B1 (pt) 2011-08-18 2012-08-20 compostos, seus complexos, processos para desidrogenação, para hidrogenação de um substrato e para produção de h2

Country Status (10)

Country Link
US (2) US10583427B2 (pt)
EP (1) EP2744815B1 (pt)
JP (3) JP2014524428A (pt)
CN (2) CN103857687B (pt)
BR (1) BR112014006964B1 (pt)
CA (1) CA2845017C (pt)
ES (1) ES2719798T3 (pt)
MX (1) MX365001B (pt)
SG (1) SG11201400146RA (pt)
WO (1) WO2013023307A1 (pt)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201208589D0 (en) 2012-05-16 2012-06-27 Givaudan Sa Improvements in or relating to organic compounds
JP6670108B2 (ja) * 2013-03-15 2020-03-18 ドミトリー・ゴッサブ 水素化および脱水素法のためのアミノ−ホスフィンリガンドに基づく錯体触媒
CN105308058B (zh) 2013-06-20 2018-10-12 株式会社可乐丽 包含三齿氨基二碳烯配体的金属配合物和使用其的氢化还原方法
GB201401230D0 (en) 2014-01-24 2014-03-12 Givaudan Sa Improvements in or relating to organic compounds
CN104804041B (zh) * 2014-01-26 2018-07-13 中国科学院上海有机化学研究所 Ncp配体、其铱络合物、合成方法、中间体及应用
EP3233800A4 (en) * 2014-12-19 2018-08-01 Dow Silicones Corporation Ligand components, associated reaction products, activated reaction products, hydrosilylation catalysts and hydrosilylation curable compositions including the ligand components, and associated methods for preparing same
EP3310745B1 (en) * 2015-06-17 2022-08-10 Firmenich SA Hydrogenation of aldehyde or ketone compounds with fe/tridentate ligands complexes
CN104926602A (zh) * 2015-07-09 2015-09-23 武汉工程大学 一种癸酮催化氢化制备癸醇的方法
CN106050480B (zh) * 2016-07-06 2018-09-14 浙江大学 适用于氢能汽车的液体有机氢化物车载供氢系统
US11413610B2 (en) 2018-01-10 2022-08-16 Basf Se Use of a transition metal catalyst comprising a tetradentate ligand for hydrogenation of esters and/or formation of esters, a process for hydrogenation of esters, a process for formation of esters and a transition metal complex comprising said tetradentate ligand
WO2019175158A1 (en) 2018-03-16 2019-09-19 Firmenich Sa Hydrogenation of carbonyls with tetradentate pnnp ligand ruthenium complexes
CN111153940B (zh) * 2018-11-08 2022-06-21 中国科学院上海有机化学研究所 Pnn三齿配体、钌络合物、其制备方法和应用
IL264043A (en) * 2018-12-31 2020-06-30 Yeda Res & Dev A reversible liquid organic system for storing and releasing hydrogen, based on ethylene glycol
CN109705169B (zh) * 2019-01-30 2021-05-18 苏州大学 双茂基稀土金属配合物在催化胺硼烷脱氢偶联中的应用
WO2021001240A1 (de) 2019-07-03 2021-01-07 Basf Se Hydrierung von estern zu alkoholen in gegenwart eines ru-pnn-komplexes
CN112570032A (zh) * 2020-11-17 2021-03-30 广东仁康达材料科技有限公司 一种水溶性氢甲酰化催化剂及其应用

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2007140870A (ru) 2005-04-05 2009-05-20 Фирмениш Са (Ch) Гидрирование сложных эфиров в присутствии комплексов ru c тетрадентатными лигандами
SG182997A1 (en) * 2005-07-21 2012-08-30 Chevron Phillips Chemical Co Diimine metal complexes, methods of synthesis, and methods of using in oligomerization and polymerization
JP5294303B2 (ja) * 2008-03-31 2013-09-18 国立大学法人神戸大学 新規なn,n,p−三座シッフ塩基配位子化合物および該化合物を用いた不斉合成

Also Published As

Publication number Publication date
US20140328748A1 (en) 2014-11-06
MX365001B (es) 2019-05-17
EP2744815B1 (en) 2019-01-16
US10583427B2 (en) 2020-03-10
CN110105399B (zh) 2022-08-05
CA2845017A1 (en) 2013-02-21
JP6616757B2 (ja) 2019-12-04
US11305268B2 (en) 2022-04-19
EP2744815A4 (en) 2015-04-01
MX2014001887A (es) 2014-05-27
US20200147597A1 (en) 2020-05-14
CA2845017C (en) 2020-09-08
CN103857687A (zh) 2014-06-11
CN103857687B (zh) 2020-10-16
EP2744815A1 (en) 2014-06-25
CN110105399A (zh) 2019-08-09
BR112014006964B1 (pt) 2020-11-17
SG11201400146RA (en) 2014-04-28
JP2017078058A (ja) 2017-04-27
ES2719798T3 (es) 2019-07-16
JP2020002142A (ja) 2020-01-09
JP2014524428A (ja) 2014-09-22
WO2013023307A1 (en) 2013-02-21

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B06T Formal requirements before examination [chapter 6.20 patent gazette]
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
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