Zirconium-titanium phosphate acid catalysts synthesized by sol gel techniques

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Recently a large effort has been put into identifying solid acid materials, particularly sulfated zirconia and other sulfated metal oxides, that can be used to replace environmentally hazardous liquid acids in industrial processes. The authors are studying a group of mixed metal phosphates, some of which have also been sulfated, for their catalytic and morphological characteristics. Zirconium and titanium are the metals used in this study and the catalysts are synthesized from alkoxide starting materials with H{sub 3}PO{sub 4}, H{sub 2}O, and sometimes H{sub 2}SO{sub 4} as gelling agents. The measurement of acidity was achieved by using the isomerization of ... continued below

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9 p.

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Jackson, N.B.; Thoma, S.G.; Kohler, S. & Nenoff, T.M. March 1, 1998.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Recently a large effort has been put into identifying solid acid materials, particularly sulfated zirconia and other sulfated metal oxides, that can be used to replace environmentally hazardous liquid acids in industrial processes. The authors are studying a group of mixed metal phosphates, some of which have also been sulfated, for their catalytic and morphological characteristics. Zirconium and titanium are the metals used in this study and the catalysts are synthesized from alkoxide starting materials with H{sub 3}PO{sub 4}, H{sub 2}O, and sometimes H{sub 2}SO{sub 4} as gelling agents. The measurement of acidity was achieved by using the isomerization of 2-methyl-2-pentene as a model reaction. The phosphate stabilized the mixed metal sulfates, preventing them from calcining to oxides boosting their initial catalytic activity. The addition of sulfate prevented the formation of the catalytically inactive mixed metal pyrophosphates when calcined at high temperatures (> 773 K).

Physical Description

9 p.

Notes

OSTI as DE98005781

Source

  • 7. international symposium on scientific bases for the preparation of heterogeneous catalysts, Louvain-la-Neuve (Belgium), 1-4 Sep 1998

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  • Other: DE98005781
  • Report No.: SAND--98-0716C
  • Report No.: CONF-980908--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 658238
  • Archival Resource Key: ark:/67531/metadc707994

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  • March 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • May 5, 2016, 7:39 p.m.

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Jackson, N.B.; Thoma, S.G.; Kohler, S. & Nenoff, T.M. Zirconium-titanium phosphate acid catalysts synthesized by sol gel techniques, article, March 1, 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc707994/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.