2MgO·2B_2O_3·MgCl_2·14H_2O-H_3BO_3-H_2O体系30℃相平衡

用相平衡方法研究了2MgO·2B_2O_3·MgCl_2·14H_2O-H_3BO_3-H_2O在30 ℃ 不同浓度H_3BO_3水溶液中的溶解转化产物及其溶解度。结果表明，氯柱硼镁石的 溶解转化产物，在H_3BO_3质量分数≤2.50%时为多水硼镁石；在2.50% ～ 5. 00%H_3BO_3范围时为库水硼镁石；当H_3BO_3量在5.00% ～ 5.60%之间时为章氏硼 镁石；而当H_3BO_3量≥5.60%时为三方硼镁石。提出了溶解相转化机理。     

硼酸盐化学——ⅩⅩⅩⅣ.MgO-B2O3-18%MgCl2-H2O体系20℃热力学非平衡态相图

采用结晶动力学方法对MgO-B₂O₃-18%MgCl₂-H₂O体系20℃时过饱和溶液的结晶过程进行了研究, 结晶析出固相通过 X射线粉末衍射、红外光谱、热分析和化学分析进行鉴定, 从而给出该体系20℃时的热力学非平衡态相图. 该相图有8个相区分别与H₃BO₃, MgO·3B₂O₃·7.5H₂O, MgO·3B₂O₃·7H₂O, 2MgO· 3B₂O₃·15H₂O (多水硼镁石), MgO·2B₂O₃· 9H₂O, 2MgO· 2B₂O₃·MgCl₂· 14H₂O, 5Mg(OH)₂·MgCl₂·8H₂O和Mg (OH)₂相对应.     

Pitzer混合参数对HCl-KCl-H20体系25℃时溶解度预测的影响

The solubility variation of the phase system HC1-KC1-H2O at 25 C is reported when θHk(interactions between two species with the same charge) and ψmcl(interactions among three species)are changed within±10%. The calculated results indicate that the interactions among the three species are much stronger than that between the two species, whereas the combination of the two kinds of interactions result in great changes of the solubility of the system. This results is important for the salting out technology of the water-salt system.     

MgO－MgCl_2－H_2O溶液热化学研究

用精密量热仪对模拟合成的ＭｇＯ－２７．５６％ＭｇＣｌ_２－Ｈ_２Ｏ浓盐溶液进行恒沸盐酸－△Ｈ滴定。发现活性ＭｇＯ在２７．５６％ＭｇＣｌ_２－Ｈ_２Ｏ溶液中不同浓度时表现出不同的结果，结合该浓盐溶液的恒沸盐酸－ｐＨ滴定结果对反应机制进行了初步探讨。     

氯碳酸镁盐的溶解、转化机制及动力学研究

采用ＮＨ４ＨＣＯ３溶液逐滴加入浓的ＭｇＣｌ２水溶液中，经回流沸腾制得氯碳酸镁盐的晶体２ＭｇＣＯ３．Ｍｇ（ＯＨ）２．ＭｇＣｌ２．６Ｈ２Ｏ。     

水热特性对MgO·3B2O3-18%MgSO4-H2O过饱和溶液析出固相的影响

The supersaturated solution of MgO·3B₂O₃-18%MgSO₄-H₂O was prepared and then reacted under hy-drothermal condition at 120℃. The solid phases of the different time were identified by means of chemical analysis, XRD, FT-IR, SEM. The results show that the solid phases are spherical and sheet szaibelyite, which is different from those of non-hydrothermal condition. On these grounds we suggested the crystallization mechanism of sza-ibelyite under the hydrothermal condition and then discussed the effects of hydrothermal properties on the crystal-lization mechanism.     

5Mg(OH)2·MgSO4·2H2O晶须生长过程中的形貌研究

Using MgSO₄ and NaOH solutions as starting materials, the whisker of 5Mg(OH)₂·MgSO₄·2H₂O has been prepared by hydrothermal method at 160℃ for different time. The whisker was separated, washed by water, ethanol and ether,and characterized by chemical analysis, XRD, IR and microphotography. The growth time of whisker would affect its morphology.     

Pitzer混合参数对HCl-KCl-H2O体系25 ℃时溶解度预测的影响

Pitzer混合参数对HCl-KCl-H2O体系25 ℃时溶解度预测的影响     

[Cs(NTO)(H_2O)]配合物的合成及表征

本文首次用碳酸铯与NTO直接合成新的Cs NTO配合物。采用元素分析和化学分析法确定了配合物的组成。用红外光谱法 ,热分析法和X ray粉末衍射法进行了物理化学表征     

Mg2+,Li+//SO2-4-C2H5OH-H2O体系在25℃的等温互溶度和相关系

硫酸镁;硫酸锂;乙醇;Mg2+;Li+//SO2-4-C2H5OH-H2O体系在25℃的等温互溶度和相关系