Potassium Hydroxide → Stannic chloride pentahydrate

A tin (IV) chloride pentahydrate (Aldrich) solution was prepared by addition of the solid to distilled water. A second solution was produced by combining either sodium or potassium hydroxide (Fisher) and 40% colloidal silica (HS-40, DuPont) in distilled water followed by vigorous stirring; gallium oxide (Aldrich) 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 gallium oxide/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 7. Chemical analyses of products are given in Table 8. A typical x.ray diffraction pattern for phase B is shown in Table 9.

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

ORD-Eintrag

ord-c8f2aba8b5a348db9a49730dd5acc743

Quelldatensatz

uspto-grants-1993_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05192519