Ammonium dichromate solid support

Catalyst samples were prepared and provided by Synetix, a division of Johnson-Matthey. A solution of ammonium dichromate or potassium hydroxide and ammonium dichromate was added to the support (Engelhard A1-3992E, S.A. 200 m g ) and the resulting suspension evaporated to dryness. The solid was then calcined in air at 823 K for 3 hours. The catalyst, with 1% Cr203 by weight, is yellow. The catalyst was pressed into pellets. 

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