| 摘要 |
PURPOSE:To reutilize and reuse a used catalyst by coating the used catalyst with a compsn. contg. a certain percentage or more of gypsum and titanium oxide and further contg. the oxide of V, W, etc., in a certain thickness or above. CONSTITUTION:A used catalyst is coated with a compsn. contg. gypsum and/or ash of coal and titanium oxide required to activate the catalyst as principal components by >=80wt.% of the amt. of the catalyst and further contg. the oxide of V, W, Mo, etc., in >=100mum thickness. Performance comparable to that of an unused catalyst based on titanium oxide is obtd. at a low cost by reutilizing the used catalyst without carrying out molding. |
