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The metal ruthenium can be obtained by reducing the ruthenium chloride with calcium by a metal thermal reduction method and reducing cesium carbonate with magnesium or calcium carbide.
Extraction of bismuth compounds
There are various methods such as double salt precipitation, solvent extraction, and ion exchange. China Zigong recovered from brines rubidium using ammonium phosphomolybdate precipitation. After the brine is subjected to strontium salt and potassium precipitation, the mother liquor contains about 2.8 to 3.5 g/liter of strontium. Chlorine gas is passed to oxidize organic matter or other reducing substances, and then an excess of 50% ammonium phosphomolybdate powder is added, and the reaction is carried out at room temperature as follows: (NH4)3H4[P(Mo2O7)6]·xH2O+3RbCl-→Rb3H4[P( Mo2O7)6]·xH2O↓+3NH4Cl Precipitate The potassium adsorbed in the precipitate was washed away with a mixed solution of 0.01 mol of ammonium nitrate and 0.3 mol of nitric acid; and then 9 mol of ammonium nitrate was used for the plutonium from the phosphomolybdate Displaced and entered the solution; and ammonium phosphomolybdate is returned for use. The enriched cerium solution is evaporated to dryness and calcined at 300 to 350 ° C to obtain cerium nitrate having a purity of more than 80%, which is a raw material for further preparing cerium salt. From lepidolite - rubidium method for extracting lithium compound mentioned method is lime liquor: Xianxiang rich in potassium, rubidium, cesium carbonate solution mixed with carbon dioxide, so that potassium bicarbonate, potassium generation (KHCO 3) precipitation. Hydrochloric acid and a slightly excess solution of tin tetrachloride hydrochloride were added to precipitate bismuth chlorostannate (Cs2SnCl6). An excess of tin tetrachloride was added to form a precipitate of bismuth chlorostannate (Rb2SnCl6). It may also be BAMBP (one substituted phenol) from the extractant rubidium carbonate solution or alkali metal chloride solution.