ストロンチウムジヒドロキシド 化学特性,用途語,生産方法
解説
Sr(OH)2(121.63)．硝酸ストロンチウムの水溶液に低温で水酸化カリウムを作用させると八水和物が得られる．八水和物は無色の正方晶系結晶．密度1.90 g cm－3．水100 g に対する溶解度は0.80 g(20 ℃)，21.8 g(100 ℃)．空気中で風解して一水和物になりやすい．八水和物を100 ℃ に熱すると無水物が得られる．無水物は無色の粉末．融点375 ℃．密度3.62 g cm－3．吸湿性で強熱すると分解して酸化ストロンチウムとなる．二酸化炭素を吸収して炭酸ストロンチウムとなる．砂糖の精製，潤滑油やせっけんの製造，合成樹脂の安定剤，触媒，コンクリートの凍結防止剤，寒剤，冷熱剤などに用いられる．[CAS 18480-07-4:Sr(OH)2][CAS 1311-10-0:Sr(OH)2･8H2O]
森北出版「化学辞典（第2版）
説明
Strontium Hydroxide occurs as an anhydrate whose prismatic, colorless
crystals are deliquescent. A monohydrate and octahydrate
are also known.Strontium hydroxide is slightly soluble in water but,
surprisingly, the octahydrate is much more soluble. It
is the latter that is supplied commercially for most applications.When the octahydrate is heated, seven waters of
hydration are lost to form the monohydrate and finally the oxide.
化学的特性
colourless deliquescent crystals
物理的性質
White deliquescent crystal; density 3.625 g/cm
3; melts at 375°C in hydrogen atmosphere; converts to oxide at 710°C; slightly soluble in water at 0°C, 0.41 g/100 mL, soluble in boiling water at 100°C, 21.83 g/100 mL; soluble in acids and ammonium chloride solution.
The octahydrate consists of colorless, tetragonal, deliquescent crystals; density 1.90 g/cm
3; loses all its water molecules at 100°C; sparingly soluble in water at low temperatures, 0.90 g/100 mL at 0°C; soluble in boiling water, 47.7 g/100 mL at 100°C; aqueous solution highly alkaline; soluble in acids and in ammonium chloride solution; insoluble in acetone.
使用
Strontium hydroxide [Sr(OH)2] is used to extract sugar from sugar beet molasses. It is also used in the manufacture of soaps, adhesives, plastics, glass, and lubricants that can be used in very high or low temperature environments.
製造方法
Preparation Strontium hydroxide is prepared by treating strontium oxide with water: SrO + H
2O → Sr(OH)
2 Alternatively, Sr(OH)2 is made by heating strontium carbonate or strontium sulfide with steam at temperatures around 500 to 600°C: SrCO
3 + H
2O → Sr(OH)
2 + CO
2 SrS + 2H
2O → Sr(OH)
2 + H
2S.
純化方法
Crystallise the hydroxide from hot water (2.2mL/g) by cooling to 0o.
ストロンチウムジヒドロキシド 上流と下流の製品情報
原材料
準備製品