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  • 1
    Electronic Resource
    Electronic Resource
    Improved method for dealumination of faujasite-type zeolites with silicon tetrachloride (1989)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 93 (1989), S. 3240-3243 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100345a071
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Novel “ship-in-the-bottle” type catalyst: evidence for encapsulation of 12-tungstophosphoric acid in the supercage of synthetic faujasite (1996)
    Springer
    Catalysis letters 39 (1996), S. 27-31 
    Details
    ISSN: 1572-879X
    Keywords: heteropolyacid in zeolite ; faujasite with H3PW12O40 ; encapsulation of H3PW12O40 in faujasite ; m-xylene conversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A new type of “ship-in-the-bottle” catalyst has been obtained by encapsulation of heteropolyacid H3PW12O40 in the supercage of faujasite. As shown by XRD and IR, the structure of zeolite Y after encapsulation is retained.31P MAS NMR reveals that the signal at −14.4 ppm, assigned to the Keggin unit, is in the case of the encapsulated catalyst much broader than the line observed for a sample containing the heteropolyacid adsorbed on the zeolite. The broadening is due to interaction between phosphorus and aluminium from zeolite. Highly active catalysts are formed by encapsulation, as exemplified here by strongly increased activity and modified selectivity in isomerization and disproportionation ofm-xylene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00813725
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Heterogenization of 12-tungstophosphoric acid on stabilized zeolite Y (2000)
    Springer
    Topics in catalysis 11-12 (2000), S. 391-400 
    Details
    ISSN: 1572-9028
    Keywords: 12-tungstophosphoric acid ; dealuminated faujasite ; 31P MAS NMR ; 29Si MAS NMR ; 27Al MAS NMR ; m-xylene transformation ; liquid-phase oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract 12-tungstophosphoric acid (PW12) has been supported on dealuminated zeolite Y, containing a secondary pore system with the predominant pore radii of 15 Å. The interaction between the heteropolyacid and the zeolite matrix has been studied using 29Si, 27Al and 31P MAS NMR. Distribution of two types of the Keggin anions, strongly and weakly interacting with the support, has been estimated quantitatively. Increased acidic properties of the PW12/zeolite Y system were demonstrated by a change in the selectivity pattern of m-xylene transformations in the gas phase (significantly increased dealkylation and transalkylation paths at the expense of isomerization). Redox properties were evaluated in oxidation reactions with H2O2 in the liquid phase. It has been shown that the PW12/zeolite Y catalysts can selectively oxidize a number of organic compounds at relatively low temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1027213512038
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  • 4
    Electronic Resource
    Electronic Resource
    Dehydroxylation and catalytic activity of dealuminated Y zeolites (1981)
    Springer
    Reaction kinetics and catalysis letters 16 (1981), S. 39-42 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Изучены дегидроксилрование и каталитическое превращение м-кислола на деалуминированньх цеолитах.
    Notes: Abstract Dehydroxylation and catalytic conversion of m-xylene over dealuminated zeolites were studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02077025
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    m-Xylene isomerization/disproportionation selectivity over dealuminated Y zeolite (1986)
    Springer
    Reaction kinetics and catalysis letters 31 (1986), S. 215-219 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Исследовано превращение м-ксилола на деалюминированном цеолите Y сразличным натриево-обменным уровнем. Селективность м-ксилола к реакциям изомеризации/qdиспорционирования зависит от концентрации кислых центров в фожазите с алюминиевой дефицитностью.
    Notes: Abstract The conversion of m-xylene over dealuminated zeolite Y with different sodium exchange level has been studied. It has been established that m-xylene isomerization/disproportination selectivity depends on the concentration of the acid centers in the aluminium-deficient faujasite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02062535
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  • 6
    Electronic Resource
    Electronic Resource
    m-Xylene conversion over dealuminated Y zeolites studied by the pulse method (1979)
    Springer
    Reaction kinetics and catalysis letters 9 (1979), S. 395-399 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Превращение м-ксилола было исследовано на дэалюминированных цеолитах типа У в водородных формах. Отношения SiO2/Al2O3 изменялось от 4,86 до 12,95.
    Notes: Abstract m-Xylene conversion was studied over dealuminated Y type zeolites in hydrogen forms, SiO2 to Al2O3 ratios were varied from 4.86 to 12.95.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02077675
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  • 7
    Electronic Resource
    Electronic Resource
    Alkylation of toluene with methanol on zeolites: Evidence for Rideal type mechanism (1988)
    Springer
    Reaction kinetics and catalysis letters 36 (1988), S. 241-246 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Алкилировали толуол метанолом на цеолитах H, Na−Y, FAU и H-ZSM-5. Результаты согласуются с механизмом Ридиля.
    Notes: Abstract Alkylation of toluene with methanol on zeolites H, Na−Y, FAU and H-ZSM-5 has been carried out. The results are consistent with the Rideal type mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02071171
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    Paper (German National Licenses)
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