Method of making inorganic gold compound
a technology of inorganic gold and compound, which is applied in the field of making inorganic gold compound, can solve the problems of high investment cost, large amount of toxic nitrogen oxide generated, and polluted working environment, and achieves high yield, high yield, and safe time-saving
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example 1
Synthesis of Sodium Tetrachloroaurate Using Sodium Chlorite in Hydrochloric Acid
[0112]Gold powder (5 g) and concentrated HCl (125 mL of aqueous solution containing 36 wt % of hydrochloric acid) were placed in a 250 mL flat-bottomed flask. 5 mL of aqueous solution containing 5 wt % of sodium chlorite (NaClO2) was added into the flask and a mixture was obtained. The mixture was stirred for 10 min until the gold powder was consumed to obtain a product solution containing sodium tetrachloroaurate. The product solution was concentrated by rotary evaporation at 100° C. under a pressure of 0.5 mbar and stood at room temperature to give crystalline sodium tetrachloroaurate (>99% yield).
example 2
Synthesis of Sodium Tetrachloroaurate Using Sodium Chlorate in Hydrochloric Acid
[0113]Gold powder (0.5 g) and concentrated HCl (25 mL of aqueous solution containing 36 wt % of hydrochloric acid) were placed in a 100 mL flat-bottomed flask. 5 mL of aqueous solution containing 5 wt % of sodium chlorate (NaClO3) was added into the flask and a mixture was obtained. The mixture was stirred for 10 min until the gold powder was consumed to obtain a product solution containing sodium tetrachloroaurate. The product solution was concentrated by rotary evaporation at 100° C. under a pressure of 0.5 mbar and stood at room temperature to give crystalline sodium tetrachloroaurate (>99% yield).
example 3
Synthesis of Tetrachloroauric Acid Using Iodic Acid in Hydrochloric Acid
[0114]Gold powder (0.5 g) and concentrated HCl (25 mL of aqueous solution containing 36 wt % of hydrochloric acid) were placed in a 100 mL flat-bottomed flask. 5 mL of aqueous solution containing 5 wt % of iodic acid (HIO3) was added into the flask and a mixture was obtained. The mixture was stirred for 5 min until the gold powder was consumed to obtain a product solution containing hydrochloric acid. The product solution was concentrated by rotary evaporation at 100° C. under a pressure of 0.5 mbar and stood at room temperature to give crystalline hydrochloric acid (>99% yield).
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