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The strontian process is an obsolete chemical method to recover sugar from molasses. Its use in Europe peaked in the middle of the 19th century. The name ''strontian'' comes from the Scottish village Strontian where the source mineral strontianite (strontium carbonate) was first found. == Chemistry == Strontium carbonate is a recycled coreactant in this process. # Strontium carbonate is calcined with carbon in the presence of steam to form strontium hydroxide. The strontium and carbon dioxide formed are rejoined later in the process, forming strontium carbonate once again.〔Reinhard Brauns, (''Das Mineralreich'' ), vol. 1, Fritz Lehmann publishing, Stuttgart (1903), pp. 402-403. ''(German)''.〕 #: SrCO3 + C + H2O = Sr(OH)2 + CO2 # In a molasses solution kept near 100 °C,〔The separation of sugar by the Strontian method〕 the hydroxide reacts with soluble sugars to form water and the poorly soluble strontium-saccharate which is filtered out, but kept awash in near-boiling water. #: Sr(OH)2 + 2C12H22O11 = SrO(C12H22O11)2 + H2O # The saccharate liquid is cooled to 10 °C, cracking off one of the sugars #: SrO(C12H22O11)2 = SrO(C12H22O11) + C12H22O11 # The carbon dioxide (from the calcination) is bubbled through the saccharate solution, cracking off the second sugar and reforming the strontium carbonate, which is filtered off. #: SrO(C12H22O11) + CO2 = SrCO3 + C12H22O11 # The sugar is then extracted through evaporating the remaining solution. There are two types of strontium-saccharide: one at low temperature, the strontium-monosaccharide; and the second at high temperature, the strontium-disaccharide. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Strontian process」の詳細全文を読む スポンサード リンク
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