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Alkali metal sulphate prodn - by reacting magnesium sulphate soln with solid alkali chloride in presence of ammonia and ammonium
Alkali metal sulphate prodn - by reacting magnesium sulphate soln with solid alkali chloride in presence of ammonia and ammonium
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机译:碱金属硫酸盐产品-在氨和铵存在下,硫酸镁溶液与固体碱式氯化物反应
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摘要
Conc. or satd. MgSO4 soln is mixed with a recycled soln contg. ammonia and ammonium salts so that Mg(OH)2 having good filtering properties is precipitated and separated. A part of the remaining soln is recycled whilst the remainder is treated with a solid alkali chloride (pref. NaCl or KCl) and NH3 is introduced whereby alkali sulphate crystallises out and is separated. A part of the remaining soln is recycled to the Mg(OH)2-precipitation stage; whilst ammonia is recovered from the other part and returned to the NH3-saturation stage. High alkali sulphate yields are obtd.
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