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四元体系

四元体系的相关文献在1986年到2022年内共计113篇,主要集中在化学、化学工业、金属学与金属工艺 等领域,其中期刊论文86篇、会议论文13篇、专利文献209543篇;相关期刊50种,包括南阳师范学院学报、盐湖研究、武汉工程大学学报等; 相关会议7种,包括第十五届全国相图学术会议暨相图与材料设计国际研讨会、2009年中国中西部地区无机化学、化工学术研讨会、第十四届全国相图会议暨国际相图与材料设计研讨会等;四元体系的相关文献由236位作者贡献,包括王惠、乔占平、冉新权等。

四元体系—发文量

期刊论文>

论文:86 占比:0.04%

会议论文>

论文:13 占比:0.01%

专利文献>

论文:209543 占比:99.95%

总计:209642篇

四元体系—发文趋势图

四元体系

-研究学者

  • 王惠
  • 乔占平
  • 冉新权
  • 卓立宏
  • 张逢星
  • 曾英
  • 宋彭生
  • 桑世华
  • 殷辉安
  • 刘会洲
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 彭晓华; 魏昶; 李兴彬; 邓志敢; 李旻廷; 李永勇
    • 摘要: 为了研究湿法炼锌涉及的四元体系MgSO_(4)-ZnSO_(4)-H_(2)SO_(4)-H_(2)O的固液相平衡及其溶液物化性质,采用等温溶解平衡法,分析了−15~100°C下硫酸镁在该体系饱和时的固液相平衡关系,测定了硫酸镁的溶解度,并绘制了相应的溶解度曲线。结果表明:结晶MgSO_(4)·nH_(2)O(n=1,6,7)存在的温度范围较广,平衡固相的晶型转变对硫酸镁溶解度的影响显著。当平衡固相以MgSO_(4)·_(7)H_(2)O或MgSO_(4)·_(6)H_(2)O形式存在时,硫酸镁溶解度随温度升高而增大;当平衡固相以MgSO_(4)·H_(2)O形式存在时,硫酸镁溶解度随温度升高而减小。此外,增大硫酸浓度会抑制硫酸镁的溶解,但可降低溶液体系的冰点。XRD分析结果显示,该体系在−10°C下的平衡固相为MgSO_(4)·_(7)H_(2)O和ZnSO_(4)·_(7)H_(2)O,在40°C和65°C下的平衡固相为MgSO_(4)·_(6)H_(2)O和ZnSO_(4)·_(6)H_(2)O,在90°C下的平衡固相为MgSO_(4)·H_(2)O和ZnSO_(4)·H_(2)O。
    • 马玉军; 王晓; 李淑雅; 张付康; 李娟
    • 摘要: 柴达木盐湖中具有丰富的盐湖离子,对其中的一个四元体系水盐相图开展研究,采用等温溶解平衡法开展了298.15 K时四元体系NaCl+NaBO_(2)+Na_(2)CO_(3)+H_(2)O相平衡研究,测定了体系平衡液相组成及密度和折光率,绘制了四元体系NaCl+NaBO_(2)+Na_(2)CO_(3)+H_(2)O 298.15 K的相图及相应的物化性质图。研究发现NaCl+NaBO_(2)+Na_(2)CO_(3)+H_(2)O四元体系298.15 K时包含2个共饱点(E_(1)、E_(2))、5条溶解度曲线(AE_(1)、BE_(1)、CE_(2)、DE_(2)、E_(1)E_(2))、4个结晶区(NaCl、NaBO_(2)·4H_(2)O、Na_(2)CO_(3)·7H_(2)O、NaCl·NaBO_(2)·2H_(2)O)。其中三元体系NaCl+NaBO_(2)+H_(2)O在298.15 K下产生了复盐NaCl·NaBO_(2)·2H_(2)O,通过研究发现该四元体系NaCl+NaBO_(2)+Na_(2)CO_(3)+H_(2)O在298.15 K下也具有NaCl·NaBO_(2)·2H_(2)O复盐区。
    • 任永胜; 曹晶; 于冰洁
    • 摘要: 采用等温溶解法研究313.15 K下四元体系Na+//SO42-,CO32-,NO3--H2O的固液相平衡关系.测定了平衡溶液的溶解度数据及物理性质数据,包括密度、黏度、折射率.根据实验数据,绘制了相应的干盐相图、水图及物理性质-组成图.实验结果表明:313.15 K下,此四元体系相图包括两个共饱和点,六条单变曲线以及五个单盐结晶区域(分别为NaNO3,Na2SO4,Na2CO3·H2O,Bur(Na2CO3·2Na2SO4),Da(NaNO3·Na2SO4·H2O)),其中Bur的结晶区域最大,最容易从混合溶液中结晶析出.实验中的物理性质(黏度 、 密度 、 折射率)随J(Na2SO4)的变化呈现相似性规律.该体系中存在复盐碱芒硝Bur(Na2CO3·2Na2SO4)、钠硝矾Da(NaNO3·Na2SO4·H2O),结晶水合物(Na2CO3·H2O),没有固溶体存在,故该体系是一个复杂的共饱和型.实验所获数据和结论对煤化工过程产生的高盐废水结晶析盐工艺开发及实现资源梯级综合利用具有重要意义.
    • 芦白茹; 杨光; 徐文秀; 朱少华; 吴腾
    • 摘要: 首先对四元体系的基本原材料及其凝结硬化机理进行了分析,研究了不同比例的普通硅酸盐、硫铝酸盐水泥、石膏、矿粉混合体系的水泥砂浆的强度、流动度、凝结时间,确定矿粉最适宜的掺量,旨在为制备快硬、早强、易于施工的四元胶凝体系修补材料提供一定的依据.
    • 吴爽; 李继红; 卢瑞平; 林铭; 胡祖辉
    • 摘要: 201×7型离子交换树脂生产仲钨酸铵是典型的季铵盐法,制备出的钨酸铵溶液主要以(NH ) WO -NH Cl-NH ·H O-H O四元体系组成。其结晶母液主要成分氯离子、氨/铵等物质必须加以处理,才能实现钨循环回主流程。处理结晶母液的方法各式各样,比如可溶性钙盐沉淀法、大孔型弱酸性交换树脂、变参离子交换法等,各有优缺点。充分利用流程现有条件及设备,严肃流程冲兑工艺、严把化验室过程元素分析,高效地实现钨酸钠溶液的钨酸根形变、氯离子Cl-杂钨比及氨铵相转化。本工艺易操作,可行性强。本法更适用于处理叔胺法生产仲钨酸铵的三元体系结晶母液。
    • 赵颖颖; 史婧祎; 李丹; 吴梦凡; 谢英惠; 袁俊生
    • 摘要: A large number of magnesium ions and bicarbonate radical in the seawater after decalcification and carbon fixation of the new alkaline source.The extraction of magnesium ions can realize the utilization of seawater magnesium resources and further soften seawater.Meanwhile separation of bicarbonate is conducive to the subsequent use of seawater resources.The extraction of magnesium and bicarbonate need to be carried out under alkaline condition.Therefore,in this experiment,the seawater system after CO2 decalcification is simplified as Mg2+//CO2-3,HCO3-,OH--H2O system.In order to explore the law of salt deposition in explosive system,the isothermal dissolution equilibrium method is used to study the phase equilibrium of the seawater system which is the phase equilibrium system at 10 °C.The liquid phase composition is obtained with solution titration method,the composition of the solid phase material is determined by X-ray diffraction analysis technology,and the phase diagram of the quaternary system is drawn by using the software of origin9.0.We obtain a three-phase total saturation which comprises MgCO3· 3H2O,Mg (OH) 2 and Mg5 (CO3)4 (OH)2· 8H2O.The three cosaturated curves are respectively as follows:MgCO3· 3H2O and Mg (OH)2 co-saturated line,Mg5 (CO3)4 (OH)2·8H2O and Mg(OH)2 co-saturated line,Mg5(CO3)4(OH)2·8H2O and MgCO3·3H2O co-saturated line;the two distinct crystalline regions are MgCO3-3H2O crystalline region and Mg (OH)2 crystalline region; a partial crystalline region of Mg5(CO3)4(0H)2 -8H2O. The experiment provides a reference for salt chemical production and crystallization separation and purification.%新型碱源脱钙固碳之后的海水中存在的大量镁离子和碳酸氢根,提取其中的镁离子可以实现海水镁资源利用并将海水进一步软化;分离碳酸氢根使固碳彻底,有利于后续海水资源利用.镁和碳酸氢根的提取需要在碱性条件下进行,因此,本实验将CO2脱钙之后的海水体系简化为Mg2+//CO32-、HCO3-、OH--H2O体系.并利用等温溶解平衡法,研究该体系在10°C条件下的相平衡,探索体系的析盐规律.液相组成通过溶液滴定法获得,由X射线衍射分析技术测出固相物质组成得出,并利用origin9.0软件绘制出四元体系相图.相图中得到1个三相共饱点,固相物组成是MgCO3·3H2O、Mg(OH)2和Mg5(C O3)4(OH)2·8H2O;3条共饱和曲线分别为MgCO3·3H2O、Mg(OH)2的共饱线,Mg5(CO3)4(OH)2·8H2O、Mg(OH)2的共饱线,Mg5(CO3)4(OH)2· 8H2O、MgCO3· 3H2O的共饱线;2个明显的结晶区,MgCO3· 3H2O结晶区和Mg(OH)2结晶区,1个Mg5(CO3)4(OH)2·8H2O的部分结晶区.以上实验数据可为盐化工生产及结晶分离提纯提供参考依据.
    • 沈薇; 谢娟; 何婷婷; 任永胜
    • 摘要: Solid-liquid equilibria of a reciprocal quaternary system (Na+, K+ // SO42-, H2PO4-- H2O) at 298.15K were studied with isothermal solution saturation method. Solubility and physical properties (nD, η, ρ) of the equilibrium quaternary system were measured, and corresponding phase diagram, water diagram and physical property (ρ, η, nD) diagram were produced based on the data measured. The experimental results show that the phase diagram at 298.15 K contains four invariant points, nine univariant curves and six single salt crystallization fields which are K2SO4, Gla (3K2SO4·Na2SO4), Na2SO4·10H2O, KH2PO4, Na2SO4,NaH2PO4·2H2O, respectively. The Gla crystallization field occupies the largest part, which indicates it is easier to crystallize in the mixing solution. Gla (3K2SO4·Na2SO4) and crystalline hydrate (Na2SO4·10H2O,NaH2PO4·2H2O) are proven to co-exist in the quaternary system, whereas no solid solution is found at the investigated temperature, which means the reciprocal quaternary system is a complex eutectic type. Physical properties (nD, η, ρ) change regularly with the change of J(SO42-) composition in the saturated solution.%采用等温溶解法研究298.15 K下交互四元体系(Na+,K+//SO42-,H2PO4--H2O)的固液相平衡关系.测定了平衡溶液的溶解度数据及物理性质,包括密度,黏度,折光率.根据实验数据,绘制了相应的干盐相图,水图及物理性质-组成图.实验结果表明:在298.15 K下,该交互四元体系相图包括四个共饱和点,九条单变曲线及六个单盐结晶区域,分别为K2SO4,Gla(3K2SO4·Na2SO4),Na2SO4·10H2O,KH2PO4,Na2SO4,NaH2PO4·2H2O,其中Gla的结晶区域最大,最容易从混合溶液中结晶析出.该体系中存在复盐钾芒硝Gla(3K2SO4.Na2SO4),结晶水合物(Na2SO4.10H2O,NaH2PO4.2H2O),没有固溶体存在,是一个复杂的共饱和型体系.物理性质(黏度,密度,折光率)随饱和溶液中J(SO42-)的变化呈现相似规律.
    • 王建中; 尹春松
    • 摘要: 针对"互联网+"形势下,高职高专计算机基础课程如何适应新的人才培养模式和行业需求,满足企事业单位办公自动化必备的基本技能,提出了计算机基础MOOCs与混合教学的新方法,以"模块任务"为驱动,开发MOOCs资源,满足网络在线模块任务学习、课堂模块测验、线上线下答疑、三方考试评价的四元体系.通过教学实践证明,能有效提高学生计算机基础课程的应用能力,达到教学改革目标.
    • 王彩红; 林雄超; 杨萨莎; 刘淑琴; YOON Seongho; 王永刚
    • 摘要: In the present work, the synergistic effect of components on the mineral behavior in the SiO2-Al2 O3-CaO-FeOx quaternary system was tentatively evaluated. The mineral transformation and reaction were analyzed by thermo-mechanical analyzer ( TMA ) , differential scanning calorimetry ( DSC ) , X-ray diffraction ( XRD ) and thermodynamic calculation ( FactSage ) . In addition, the apparent viscosities of synthetic slags, expressed as a function of temperature and composition, were determined using a high temperature rotary viscometer with temperature ranging from 1 700°C to re-solidifying temperature. The results demonstrated that the TMA and DSC approaches were applicable to characterize the mineral behavior under in-situ conditions. Silica and alumina preferred to be transformed to high temperature cristobalite and a-alumina with relatively stable structure and high viscosity, respectively. On the other hand, the reaction and transformation of silica and alumina could be accelerated by some valuable fluxing agents, particularly calcium oxide and iron oxides. The addition of ferrous oxide into synthetic slags could lower its viscosity compared with that of ferric oxide and ferroferric oxide. Furthermore, the reduction of iron oxides to metallic iron remarkably increased the viscosity. Ferric oxide may take part in the random glass network in a similar fashion with alumina. Besides, iron oxides with the oxidation state of Fe2+may also act as a modifier under slightly reducing conditions and higher temperatures. The sensitivity of viscosity of mineral matters to temperature excursion decreased with increasing calcium oxide content as calcium oxide was able to enhance the solution ability of iron oxides in the SiO2-Al2 O3-CaO-FeOx quaternary system.%利用SiO2-Al2 O3-CaO-FeOx 四元体系研究了煤中矿物质热和黏温特性规律。利用热机械分析、差热、X射线衍射和热力学模拟以及高温旋转黏度计分析了矿物质的高温演化、反应和黏温特性(1700°C到固化温度)。结果表明,热机械分析和差热可以较好地在线考察矿物质高温特性。二氧化硅和氧化铝从低温矿物转变成高温形态,表现出稳定的结构和高黏度;另一方面,加入氧化钙或氧化铁可以起到助熔剂的作用,显著加快二氧化硅和氧化铝的反应和转化并降低黏度。氧化亚铁相比氧化铁和四氧化三铁表现出更明显的降低黏度的作用,而氧化铁还原成金属将显著提高体系黏度。三价铁离子与铝类似,可构成网架结构。另外,氧化铁在弱还原或高温下将产生部分二价铁离子对网架机构进行调整。氧化钙的存在可以加强四元体系中氧化铁的溶解能力,进而降低黏度。
    • 毕思峰; 崔香梅
    • 摘要: 取密度分别为1.215、1.218、1.221 g/cm3的一里坪盐湖晶间卤水分别在-5、-10、-15、-20 °C进行冷冻除硫酸根实验,得到卤水冷冻除硫酸根最佳条件:卤水密度为1.215 g/cm3、冷冻温度为-15°C;当冷冻卤水中硫酸根质量浓度降低到原卤水中硫酸根质量浓度的1/3左右时进行固液分离.将盐湖卤水在选定条件下冷冻除硫酸根,固液分离后的卤水在实验室模拟自然蒸发.从卤水特征系数分析,冷冻后的卤水也应归入硫酸镁亚型盐湖卤水,但在自然蒸发过程中液相点的变化趋势符合25°C下Na+、K+、Mg2+∥Cl-—H2O四元体系相图.同时,将未经冷冻的原始卤水在实验室模拟自然蒸发时,液相点的变化趋势与Na+、K+、Mg2+∥Cl-、SO42-—H2O五元体系25°C介稳相图吻合.所以,从相图应用的角度看,硫酸镁亚型盐湖卤水通过冷冻脱硝实现了由五元体系向四元体系转化的可行性,从而可为一里坪盐湖卤水的开采利用提供工艺参考,并为硫酸盐型盐湖卤水的转型提供理论支撑.%To achieve the optimal condition for desulfurization by freezing,the freezing experiment on Yiliping salt lake brine was conducted under different densities of 1.215,1.218,and 1.221 g/cm3 and temperature of-5 °C,-10 °C,-15 °C,and -20 °C,respectively.Results showed that the density of 1.215 g/cm3 and temperature of-15 °C can be selected as the best conditions for desulfurization.When the concentration of SO42-was decreased to approximately 1/3 of raw brine,the separation of solid and liquid was completed.The simulated natural evaporation on residual liquid has been conducted in laboratory.As far as the characteristic coefficient of brine was concerned,the brine frozen still belonged to magnesium sulfate subtype.However,the evaporation behavior of liquid point could be in conformity with the Na+,K+,Mg2+//Cl--H2O quaternary system at 25 °C and that of raw brine untreated should be explained by the Na+,K+,Mg2+///Cl-,SO42--H2O quinary meta-stable system,which means that the chemical type of magnesium sulfate sub-type brine can be converted from quinary to quaternary by freezing in terms of application of phase diagram.It will provide technical reference for the exploitation of Yiliping salt lake and theoretical guidance for conversion of sulfate type salt lake brine.
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