反应详情

A tin (IV) chloride pentahydrate (Aldrich) solution was prepared by addition of the solid to distilled water. A second solution was produced by combining sodium hydroxide (Fisher) and 40% colloidal silica (HS-40, DuPont) in distilled water followed by vigorous stirring; a source of alumina was next added to the second solution and sometimes heated to aid in dissolution. The two mixtures were combined at room temperature by slow addition of the alumina silica solution to the aqueous tin chloride solution with rapid stirring (exothermic), producing a thick white gel. The gel was reacted in a polytetrafluoroethylene-lined autoclave (Parr) at 200° C. to produce a white solid after the reactor was cooled to room temperature. This solid was washed repeatedly with distilled water, filtered, and dried to yield a fine white powder. Reactant ratios, sources, and conditions are given in Table 1. Chemical analyses of products are given in Table 2.

1. distillationto distilled water
2. customA second solution was produced
3. additiona source of alumina was next added to the second solution
4. temperaturesometimes heated
5. dissolutionto aid in dissolution
6. customproducing a thick white gel
7. customat 200° C.
8. customto produce a white solid after the reactor
9. washThis solid was washed repeatedly with distilled water
10. filtrationfiltered
11. customdried
12. customto yield a fine white powder