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, etha...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.展开更多
The isothermal solubility and physico-chemical properties(density,refractive index)of ternary system RbCl-EtOH-H 2 O at 25℃and 50℃have been firstly inve stigated by means of self-made micro-equilibrium and sampling ...The isothermal solubility and physico-chemical properties(density,refractive index)of ternary system RbCl-EtOH-H 2 O at 25℃and 50℃have been firstly inve stigated by means of self-made micro-equilibrium and sampling apparatus .The compositio ns of liquid and solid at equilibrium state were determined,and the probl em of analysis of ethanol content in syste m was properly solved.The phase diag ram was drawn by the TPD phase-diagra m computer program developed by us.Three empirical formulae were propose d to correlate the solubility,density and refractive index respectively.No d emixing phenomena was observed in th e range of temperature related in thi s study.展开更多
Liquid-liquid equilibrium of the poly （ethylene glycol）（PEG）-Cs2SO4-H2O aqueous two-phase system,with PEG of molecular weigth 1000,4000 and 10000,was measured at 298.15 K.The binodal curves were obtained using a f...Liquid-liquid equilibrium of the poly （ethylene glycol）（PEG）-Cs2SO4-H2O aqueous two-phase system,with PEG of molecular weigth 1000,4000 and 10000,was measured at 298.15 K.The binodal curves were obtained using a four-parameter equation,and the tie lines were satisfactorily described using the Othmer-Tobias and Bancroft equations.These equations were used to develop a mathematical model for interpretation of the equilibrium data of these aqueous two-phase systems（ATPS）.It was found that an increase in the molecular weight of the PEG produced a displacement of the binodal curve toward the origin and decreased the-phase zone.展开更多
文摘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.
文摘The isothermal solubility and physico-chemical properties(density,refractive index)of ternary system RbCl-EtOH-H 2 O at 25℃and 50℃have been firstly inve stigated by means of self-made micro-equilibrium and sampling apparatus .The compositio ns of liquid and solid at equilibrium state were determined,and the probl em of analysis of ethanol content in syste m was properly solved.The phase diag ram was drawn by the TPD phase-diagra m computer program developed by us.Three empirical formulae were propose d to correlate the solubility,density and refractive index respectively.No d emixing phenomena was observed in th e range of temperature related in thi s study.
文摘Liquid-liquid equilibrium of the poly （ethylene glycol）（PEG）-Cs2SO4-H2O aqueous two-phase system,with PEG of molecular weigth 1000,4000 and 10000,was measured at 298.15 K.The binodal curves were obtained using a four-parameter equation,and the tie lines were satisfactorily described using the Othmer-Tobias and Bancroft equations.These equations were used to develop a mathematical model for interpretation of the equilibrium data of these aqueous two-phase systems（ATPS）.It was found that an increase in the molecular weight of the PEG produced a displacement of the binodal curve toward the origin and decreased the-phase zone.
