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SHEET-LIKE PARTICLES OF ZEOLITE AND METHOD FOR PRODUCING SAME

Foreign code F210010306
File No. SHW002-01WO
Posted date 2021年1月29日
Country 世界知的所有権機関(WIPO)
International application number 2020JP023067
International publication number WO 2020250985
Date of international filing 令和2年6月11日(2020.6.11)
Date of international publication 令和2年12月17日(2020.12.17)
Priority data
  • 特願2019-111523 (2019.6.14) JP
Title SHEET-LIKE PARTICLES OF ZEOLITE AND METHOD FOR PRODUCING SAME
Abstract The present invention provides: a method for producing sheet-like particles of zeolite, said particles being not obtained by a top-down method; and sheet-like particles of zeolite having an eight-membered oxygen ring structure, said particles being obtained by the production method. Sheet-like particles of zeolite according to the present invention have an eight-membered oxygen ring structure. The sheet-like particles have a thickness of 1 nm to 100 nm; and the aspect ratio ((maximum particle width)/thickness) of the sheet-like particles is 100 or more.
Outline of related art and contending technology BACKGROUND ART
Zeolites are compounds having a regularly arranged pore structure, have adsorption separation ability, ion exchange ability, shape selectivity, and the like due to their specific structure, and are widely used industrially.
Various methods have been reported as the method of producing zeolite, but the zeolite is typically produced by hydrothermal synthesis. This hydrothermal synthesis method is a method in which a gel-like substance or slurry is prepared by mixing a raw material of zeolite and liquid water, and crystals of zeolite are precipitated by heating the prepared gel-like substance or slurry under prescribed pressure conditions. Zeolite crystals obtained by hydrothermal synthesis are separated from liquid water contained in the gel-like substance or slurry by performing operations such as centrifugation or decantation.
Furthermore, an example of a method of producing zeolite other than the hydrothermal synthesis method is the dry gel conversion (DGC) method. This method includes drying a gel-like substance obtained by mixing a raw material of zeolite and water, and bringing the obtained dried gel into contact with gaseous water in a container in the presence of a structure directing agent (, for example, Patent Document 1).
Zeolites are often used as high-performance catalysts in petrochemicals, synthetic chemicals, and the like. However, despite having the potential as a high-performance catalyst, there has been problems in particular in that the pores are quickly clogged with by-products, inducing deactivation of the catalyst. As a method to solve this problem, it is proposed to use a thin sheet zeolite (zeolite nanosheet) having a thickness of 1 ~ 100 nm. As a method of synthesizing the zeolite nanosheet, a method of obtaining a nanosheet by peeling zeolite having a layered structure (, a method of synthesizing using a suitably designed bifunctional surfactant (, and a method of synthesizing the zeolite nanosheet using a suitably designed bifunctional surfactant (have been proposed. For example, in the bottom-up method, MFI type zeolite nanosheets and MTW type zeolite nanosheets are disclosed (, for example, Patent Document 2).
On the other hand, various methods have been investigated regarding the method of producing nanosheets. For example, Patent Document 3) discloses a method for producing a metal-organic framework nanosheet in which a sheet-like metal-organic framework is formed between two monomolecular layers constituting one bilayer film when the bilayer film forms a hyperswollen lamellar phase in a solvent.
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • Inventor
  • UCHIDA Yoshiaki
  • SASAKI Koki
  • NISHIYAMA Norikazu
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN WS ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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