【摘要】 借助拉曼光谱和X射线衍射（XRD）检测手段,对Mg（BO₂）₂在MgCl₂水溶液中水解的固液相平衡与物种化学平衡规律进行了研究。结果表明,MgCl₂对Mg（BO₂）₂的溶解转化、多硼氧配阴离子的物种分布有很大影响:（1）随着MgCl₂浓度从0达到饱和,Mg（BO₂）₂的表观饱和浓度从0.79%增加到1.96%,pH值从9.96降到6.27;（2）Mg（BO₂）₂在纯水中水解形成固相Mg₂B₆O₁₁·15H₂O和Mg（OH）₂,在MgCl₂溶液中形成固相Mg₂B₆O₁₁·15H₂O和Mg₃Cl₂（OH）₄·4H₂O;（3）Mg（BO₂）₂在纯水中水解,硼的物种主要为B₄O₅（OH）₄^2-和B₃O₃（OH）₄^-,分别占液相总硼含量的49.81%和19.54%。在MgCl₂饱和溶液中,主要为B₃O₃（OH）₄^-和B₅O₆OH)₄^-,分别占液相总硼含量的44.57%和40.00%。更多还原

【Abstract】 The solid liquid phase equilibria and species chemical equilibrium of Mg（BO₂）₂ dissociated in MgCl₂ aqueous solution were studied by means of Raman spectroscopy and X ray diffraction（XRD）.The results indicate that the MgCl₂ concentration has a great influence Mg（BO₂）₂ dissociation.（1）With the increasing of MgCl₂ concentra-tion from 0 to saturated state,the apparent solubility of Mg（BO₂）₂ increased from 0.79% to 1.96%,and pH value de-creased from 9.96 to 6.27;（2）Solid species are changed gradually from Mg₂B₆O₁₁·15H₂O and Mg（OH）₂,to Mg₂B₆O₁₁·15H₂O and Mg₃Cl₂（OH）₄·4H₂O;（3）Main species of polylobate anions change from B₄O₅（OH）₄^2-and B₃O₃（OH）₄^-with the accounts of 49.81%and 19.54%,to B₃O₃（OH）₄^-and B₅O₆OH)₄^-with accounts of 44.57% and 40.00% respectively.更多还原