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The impact of reagents concentration on the efficiency of obtaining high-purity magnesium hydroxide
Polish Journal of Chemical Technology ( IF 1 ) Pub Date : 2020-06-01 , DOI: 10.2478/pjct-2020-0019
Piotr Radomski 1 , Andrzej Jarosiński 2 , Zbigniew Wzorek 1 , Anna K. Nowak 1
Affiliation  

Abstract The work presents the impact of reagents concentration and the drying process on the efficiency of obtaining magnesium hydroxide and its specific surface area. Magnesium sulphate(VI) within the concentration range of 0.7–2.0 mol/dm3 was used in the research as magnesium feedstock and sodium hydroxide was used as a precipitating agent within the same concentration range. The process of obtaining magnesium hydroxide was carried out with a 25% excess of the precipitating agent in relation to the reaction stoichiometry. The obtained suspension was separated by way of multi-stage sedimentation with the use of acetone and freezing samples. Depending on the concentration of reagents the efficiency of obtaining magnesium hydroxide fell within the range of 88–99%, whereas the specific surface area – within 115–609 m2/g, while the high purity of samples above 99% of magnesium hydroxide was maintained.

中文翻译:

试剂浓度对高纯氢氧化镁制取效率的影响

摘要 研究了试剂浓度和干燥过程对氢氧化镁获得效率及其比表面积的影响。研究中使用浓度范围为 0.7-2.0 mol/dm3 的硫酸镁 (VI) 作为镁原料,使用氢氧化钠作为相同浓度范围内的沉淀剂。使用相对于反应化学计量过量25%的沉淀剂进行获得氢氧化镁的过程。使用丙酮和冷冻样品通过多级沉降分离获得的悬浮液。取决于试剂的浓度,获得氢氧化镁的效率在 88-99% 的范围内,而比表面积 - 在 115-609 m2/g 内,
更新日期:2020-06-01
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