Improved hydrous oxide ion-exchange compound catalysts

Dosch, R G; Stephens, H P

Title: Improved hydrous oxide ion-exchange compound catalysts

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Abstract

Disclosed is a catalytic material of improved activity which comprises a hydrous, alkali metal or alkaline earth metal or quaternary ammonium titanate, zirconate, niobate, or tantalate, in which the metal or ammonium cations have been exchanged with a catalytically effective quantity of a catalyst metal, and which has been subsequently treated with a solution of a Bronsted acid.

Inventors:: Dosch, R G; Stephens, H P

Issue Date:: 1986-04-09

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

OSTI Identifier:: 6953260

Application Number:: ON: DE87007228

Assignee:: Dept. of Energy

DOE Contract Number:: AC04-76DP00789

Resource Type:: Patent

Resource Relation:: Other Information: Portions of this document are illegible in microfiche products

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; CATALYSTS; CHEMICAL PREPARATION; HYDROGENATION; CATALYST SUPPORTS; INORGANIC ION EXCHANGERS; MOLYBDENUM; NIOBATES; PALLADIUM; TANTALATES; TITANATES; ZIRCONATES; CHEMICAL REACTIONS; ELEMENTS; ION EXCHANGE MATERIALS; MATERIALS; METALS; NIOBIUM COMPOUNDS; OXYGEN COMPOUNDS; PLATINUM METALS; REFRACTORY METAL COMPOUNDS; SYNTHESIS; TANTALUM COMPOUNDS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; ZIRCONIUM COMPOUNDS; 360000* - Materials

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                    Dosch, R G, and Stephens, H P. Improved hydrous oxide ion-exchange compound catalysts.  United States: N. p., 1986. 
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                    Dosch, R G, & Stephens, H P. Improved hydrous oxide ion-exchange compound catalysts.  United States.

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                    Dosch, R G, and Stephens, H P. Wed .  
        "Improved hydrous oxide ion-exchange compound catalysts".  United States.

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@article{osti_6953260,

  title        = {Improved hydrous oxide ion-exchange compound catalysts},

  author       = {Dosch, R G and Stephens, H P},

  abstractNote = {Disclosed is a catalytic material of improved activity which comprises a hydrous, alkali metal or alkaline earth metal or quaternary ammonium titanate, zirconate, niobate, or tantalate, in which the metal or ammonium cations have been exchanged with a catalytically effective quantity of a catalyst metal, and which has been subsequently treated with a solution of a Bronsted acid.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1986},

  month        = {4}

}

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Hydrous oxide ion-exchange compound catalysts

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A catalytic material of improved activity which comprises a hydrous, alkali metal or alkaline earth metal or quaternary ammonium titanate, zirconate, niobate, or tantalate, in which the metal or ammonium cations have been exchange with a catalytically effective quantity of a catalyst metal, and which has been subsequently treated with a solution of a Bronsted acid.
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In a process which is catalyzed by a catalyst comprising an active metal on a carrier, said metal being active as a catalyst for the process, an improvement is provided wherein the catalyst is a hydrous, alkali metal or alkaline earth metal titanate, zirconate, niobate or tantalate wherein alkali or alkaline earth metal cations have been exchanged with a catalytically effective amount of cations of said metal.
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Preparation of catalysts via a synthesis route which involves the use of inorganic ion-exchangers based on alkoxide derived Ti, Zr, Nb, and Ta hydrous oxides is described. These materials exhibit several unique properties, including Bronsted acidities that may be varied over many orders of magnitude by a facile ion-exchange process and the capacity to uniformally disperse any metal or mixtures of metals. The activities of Pd-exchanged hydrous titanium oxide catalysts, evaluated for the hydrogenation of pyrene, were found to dramatically increase with Bronsted acidity. The most active of the catalysts was an order of magnitude more active than gamma alumina-supportedmore »« less

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