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Synthesis of magnesium carbonate hydrate from natural talc
Open Chemistry ( IF 2.3 ) Pub Date : 2020-08-07 , DOI: 10.1515/chem-2020-0154 Qiuju Chen 1, 2 , Tao Hui 2 , Hongjuan Sun 1, 2 , Tongjiang Peng 1, 2 , Wenjin Ding 1, 2
Open Chemistry ( IF 2.3 ) Pub Date : 2020-08-07 , DOI: 10.1515/chem-2020-0154 Qiuju Chen 1, 2 , Tao Hui 2 , Hongjuan Sun 1, 2 , Tongjiang Peng 1, 2 , Wenjin Ding 1, 2
Affiliation
Abstract Various morphologies of magnesium carbonate hydrate had been synthesized without using any organic additives by carefully adjusting the reaction temperature and time during the talc carbonation process. At lower temperatures, magnesium carbonate hydrate was prone to display needle-like morphology. With the further increase of the carbonation temperature, the sheet-like crystallites became the preferred morphology, and at higher aging temperatures, these crystallites tended to assemble into layer-like structures with diverse morphologies, such as rose-like particles and nest-like structure. The reaction time had no effect on the crystal morphology, but it affected the particle size and situation of the crystal growth. X-Ray diffraction results showed that these various morphologies were closely related to their crystal structure and compositions. The needle-like magnesium carbonate hydrate had a formula of MgCO3·3H2O, whereas with the morphological transformation from needle-like to sheet-like, rose-like, and nest-like structure, their corresponding compositions also changed from MgCO3·3H2O to 4MgCO3·Mg(OH)2·8H2O, 4MgCO3·Mg(OH)2·5H2O, and 4MgCO3·Mg(OH)2·4H2O.
中文翻译:
天然滑石合成碳酸镁水合物
摘要 通过在滑石碳酸化过程中仔细调节反应温度和时间,在不使用任何有机添加剂的情况下合成了各种形态的碳酸镁水合物。在较低温度下,碳酸镁水合物易于呈现针状形态。随着碳酸化温度的进一步升高,片状微晶成为首选形态,在较高的老化温度下,这些微晶倾向于组装成具有多种形态的层状结构,如玫瑰状颗粒和巢状结构。 . 反应时间对晶体形貌没有影响,但会影响晶体的粒径和生长情况。X射线衍射结果表明,这些不同的形态与其晶体结构和成分密切相关。针状碳酸镁水合物的分子式为MgCO3·3H2O,而随着形态从针状转变为片状、玫瑰状、巢状结构,其相应的组成也由MgCO3·3H2O变为4MgCO3 ·Mg(OH)2·8H2O、4MgCO3·Mg(OH)2·5H2O、4MgCO3·Mg(OH)2·4H2O。
更新日期:2020-08-07
中文翻译:
天然滑石合成碳酸镁水合物
摘要 通过在滑石碳酸化过程中仔细调节反应温度和时间,在不使用任何有机添加剂的情况下合成了各种形态的碳酸镁水合物。在较低温度下,碳酸镁水合物易于呈现针状形态。随着碳酸化温度的进一步升高,片状微晶成为首选形态,在较高的老化温度下,这些微晶倾向于组装成具有多种形态的层状结构,如玫瑰状颗粒和巢状结构。 . 反应时间对晶体形貌没有影响,但会影响晶体的粒径和生长情况。X射线衍射结果表明,这些不同的形态与其晶体结构和成分密切相关。针状碳酸镁水合物的分子式为MgCO3·3H2O,而随着形态从针状转变为片状、玫瑰状、巢状结构,其相应的组成也由MgCO3·3H2O变为4MgCO3 ·Mg(OH)2·8H2O、4MgCO3·Mg(OH)2·5H2O、4MgCO3·Mg(OH)2·4H2O。