| Abstract The effect of preparation factors on the structure and catalytic properties has been studied. The experimental results show that, under proper condition for preparation the catalyst has higher activity and better thermal stability. Comporing to the catalyst obtained by other two preparation methods, no Na~+-washing operation was needed and the period of NH_3-evaporating process was shortened. An industrial catalyst which has highes activity and better thermal stability has been prepared. |
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1992, Vol. 9 
