Potassium trimetaphosphimate

Potassium tricyanocarbonyl-nickelate(I), formation of, from potassium hexacyano-nickelate(I), 5 201 Potassium trimetaphosphimate, K3(P02NH)3, 6 97... 

To an ice-cold solution of 35.1 g. (0.1 mol) of tripotassium trimetaphosphimate in 95 ml. of water is added, slowly, 62 ml. of 72% perchloric acid so that the temperature does not exceed 25°. The potassium perchlorate is filtered off and washed with 15 ml. of 5% perchloric acid. The combined filtrates are transferred to a 200-ml. round-bottomed flask and evaporated at reduced pressure. A Dry Ice trap and potassium hydroxide pellets are used before the oil pump. The solution is stirred with a magnetic stirring bar and is heated in a water bath at not over 31°. When nearly but not quite dry, the solids are slurried in ethyl acetate-methanol (80/20 by volume) to remove any crystallized potassium perchlorate, transferred to a Buchner funnel and rinsed, using a total of 125 ml. of the above solvent, then... 

Sodium trihydroxothioferrate(II), Na3FeS(OH)s, formation of, in preparation of potassium dithioferrate(III), 6 170 Sodium trimetaphosphimates, 6 80 Na3(P02NH)3, 1-hydrate, 6 99 4-hydrate, purification and acid hydrolysis of, for preparation of pentasodium diimidotri-phosphate, 6 105 Na3(P02NH)3-NaOH-7H20, 6 80 Sodium triphosphate (tripolyphosphate), 3 101 6-hydrate, 3 103... 

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