反应详情

A variety of Fe-containing X-zeolites were each prepared. First, sodium aluminate was dissolved with stirring and heated in sodium hydroxide and potassium hydroxide solutions until the resultant solution became transparent, so that the solution had the formulation shown in Table 1 below. Subsequently, it was cooled to room temperature. On the other hand, iron (III) nitrate was dissolved in pure water to form an iron nitrate solution. Then, pure water was added to a sodium silicate solution so that each resultant had the formulation in Table 1 below, and then it was stirred at 200 to 10,000 rpm, slowly adding sodium aluminate solution prepared above thereto. Next, the iron nitrate solution was added thereto, thereby obtaining an amorphous gel having the formulation mentioned before. The temperature of the reaction solution for generating this gel was increased to about 50° C.