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121.
2MgO·2B_2O_3·MgCl_2·14H_2O-H_3BO_3-H_2O体系30℃相平衡 总被引:5,自引:0,他引:5
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。 相似文献
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Cs2SO4-C2H5OH-H2O三元体系30℃和50℃的平衡溶解度研究 总被引:3,自引:0,他引:3
The solubilities of Cs2SO4-C2H5OH-H2O ternary system at 30℃ and 50℃ have been studied using microe-quipment for solubility determination. There appears two phases, alcoholic phase, water phase in the liquid phase. The solubilities of Cs2SO4 in water, C2H5OH and mixed solvent have been determined. The phase diagram indicated that C2H5OH might be salted out by Cs2SO4 from this system and the equilibrium solid phase is Cs2SO4. 相似文献
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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. 相似文献
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Introduction In a series of papers the authors reported the spec-troscopy results on upconversion luminescence of the double salts between the alkali metal (Rb,Cs) halide and rare earth metal trihalide (REX3).1-4 Consequently, ex-tensive syntheses of new double salts and studies on optical properties of such species have received much more attention.5-12 Although a number of these double salts have been synthesized, the formation in alkali metal halide/rare earth metal halide double salts s… 相似文献
126.
2MgO•2B2O3•MgCl2•14H2O-MgCl2-H2O体系30 ℃相平衡 总被引:1,自引:0,他引:1
用相平衡方法研究2MgO•2B2O3•MgCl2•14H2O 在30 ℃不同质量分数MgCl2 水溶液中的溶解转化产物及其溶解度. 结果表明, 该复盐在MgCl2的质量分数0~2%浓度范围, 发生不同步溶解并转化为多水硼镁石(2MgO•3B2O3•15H2O); 在MgCl2的质量分数2%~13.8%浓度范围, 转化为柱硼镁石(MgO•B2O3•3H2O), 这一结果比文献报导的该硼酸盐的形成温度低了13 ℃,为盐湖硼酸镁矿物柱硼镁石形成的解释提供了物理化学依据; 而在MgCl2质量分数大于13.8%时同步溶解,不发生转化. 提出了溶解相转化反应机理. 相似文献
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The equilibrium solubility of the LaCl3-CdCl2-(9.7%)HCl-H2O quaternary system at 298K was determined and the phase diagram was constructed. The results show that the system is complicated with four equilibrium solid- phases CdCl2·H2O, 8CdCl2·LaCl3·16H2O(8∶1 type), 4CdCl2·LaCl3·12H2O(4∶1 type) and LaCl3·7H2O, respectively. The two new compounds 8CdCl2·LaCl3·16H2O(8∶1 type) and 4CdCl2·LaCl3·12H2O(4∶1 type) are congruently soluble in ~9.7% HCl-H2O medium and have not yet been reported in literatures. Both com-pounds have been prepared from the system and have been characterized by XRD, TG-DTG and DSC. 相似文献
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盐卤硼酸盐化学——Ⅺ.不同含硼浓缩盐卤的稀释实验 总被引:2,自引:2,他引:2
前文[1]报道高含硼浓缩盐卤加水稀释过程中硼酸盐的行为。考虑到青海省柴达木盆地大柴旦盐湖卤水日晒蒸发到钾盐析出阶段,浓缩卤水中含1.87%MgB_4O_7,蒸发到水氯镁石开始析出,浓缩卤水中含2.95%MgB_4O_7。本文报道,这两种不同含硼浓缩卤水按文献[1]中实验步骤进行加水稀释,室温放置过程中析出硼酸镁盐的某些不同结果。 相似文献
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