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Solid acid-base catalysts designed through chemical vapor deposition technique and their application to organic processes

Research Project

Project/Area Number 60550584
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 有機工業化学
Research InstitutionNagoya University

Principal Investigator

IZUMI Yusuke  Nagoya University, 工学部, 教授 (00115528)

Co-Investigator(Kenkyū-buntansha) URABE Kazuo  Nagoya University, 工学部, 助手 (60092540)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1985: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsChemical vapor deposition / Solid acid catalyst / Mixed oxide catalyst / Boron oxide / Titanium oxide / Beckmann rearrangement / エステル化
Research Abstract

The present research has been attempted to design a novel type of solid acid catalysts whose active species can be highly dispersed on the support by means of chemical vapor deposition(CVD) of the precursor metal alkoxides, and to apply those solid acid catalysts to several organic processes.
The solid acid such as <B_2O_3> / <SiO_2> , <B_2O_3> / <Al_2O_3> and <TiO_2> / <SiO_2> in which active species of metal oxides were supported in a state of high dispersion could be obtained by reacting <B(OEt)_3> and <Ti(OPr)_4> with silica and alumina at 190 - 350 ゜C in the presence of oxygen. It was suggested that the metal oxides were fixed onto the support surface through repetition of the reaction between metal alkoxides and the surface hydroxy groups of support followed by the combustion of the organic moieties of the immobilized surface alkoxides.
Compared with very large metal oxide particles of 10 - 50 <mu> m found for the solid acids prepared by the ordinary impregnation method, the solid … More acids obtained by CVD consisted of uniformly dispersed very fine crystallites of active metal oxides to afford more uniform acid strengths, which were confirmed through the measurements of surface area, pore distribution, X-ray diffraction, temperature-programmed desorption of pyridine and differential heat of adsorption of ammonia, together through the observation by scanning electron microscope.
The <B_2O_3> / <SiO_2> and <B_2O_3> / <Al_2O_3> prepared by CVD exhibited higher catalytic activity and selectivity for the vapor-phase Beckmann rearrangement of cyclohexanone oxime at 250 - 300 ゜C (oxime conversion 98 - 100 %, <epsilon> -caprolactam selectivity 95 - 98 mol%), in comparison with the supported boron oxide catalyst obtained by the impregnation method. Moreover, the CVD <TiO_2> / <SiO_2> showed also higher catalytic activity for the esterification reactions in the gas phase.
Thus, the CVD of metal alkoxide in the presence of oxygen is confirmed to be an effective novel method for the design of solid acid catalysts. Less

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Satoshi Sato: Chemistry Letters. 277-278 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Hiroaki Sakurai: Chemistry Letters. 1783-1784 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Satoshi Sato: Journal of Catalysis. 102. 99-108 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Satoshi Sato: Applied Catalysis. 29. 107-115 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Satoshi Sato: "Vapor-Phase Beckmann Rearrangement of Cyclohexanone Oxime over Silica-Boria Catalyst Prepared by Chemical Vapor Deposition Method" Chemistry Letters. 277-278 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Hiroaki Sakurai: "Catalytic Behavior of Boria-Alumina Prepared by Chemical Vapor Deposition Technique" Chemistry Letters. 1783-1784 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Satoshi Sato: "Vapor-Phase Beckmann Rearrangement over Silica-Supported Boria Catalyst Prepared by Vapor Decomposition Method" Journal of Catalysis. 102. 99-108 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Satoshi Sato: "Vapor-Phase Beckmann Rearrangement over Alumina-Supported Boria Catalyst Prepared by Vapor Decomposition Method" Applied Catalysis. 29. 107-115 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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