| 摘要 |
PCT No. PCT/GB90/01121 Sec. 371 Date Feb. 27, 1992 Sec. 102(e) Date Feb. 27, 1992 PCT Filed Jul. 20, 1990 PCT Pub. No. WO91/01273 PCT Pub. Date Feb. 7, 1991.The present invention describes a method of making metal stannates by reacting a solid metal oxide, hydroxide or carbonate with an aqueous stannate solution and recovering the precipitated metal stannate, the solid component being added in an amount which is stoichiometrically not substantially more then the amount of tin. |
