摘要
用等温溶解平衡法研究了五元体系Li^+,Na^+,K^+,Mg^(2+)/SO_4^(2-)-H_2O25℃溶解度,测得了平衡溶液的密度,获得了该五元体系25℃溶解度相图的十个无变量点和十种平衡固相.十个单盐结晶区分别对应于原始组分K_2SO_4,Li_2SO_4·H_2O,MgSO_4·7H_2O,水合物Na_2SO_4·10H_2O,复盐3K_2SO_4·Na_2SO_4,Na_2SO_4·MgSO_4·4H_2O,Li_2SO_4·3Na_2SO_4·12H_2O,2Li_2SO_4·Na_2SO_4·K_2SO_4,Li_2SO_4,K_2SO_4和K_2SO_4·MgSO_4·6H_2O,此外没有产生新的复盐或固溶体.用现代电解质溶液理论-Pitzer模型校验该体系的溶解度测定值,结果令人满意.
Solubilities of the quinary system Li+ ,Na+ ,K+ ,Mg2+ /SO42-H2O were investigatedby isothermal method at 25℃ . Phase diagram of the quinary system consists of 10 invariant points and 10 crystallization fields corresponding to arcanite, lithiun sulphate monohydrate,epsomite, mirabilite, aphthitalite, bloedite, D1 (3Na2SO4·Li2SO4·12H2O), D3 (2Li2SO4·Na2SO4·K2SO4) ,D4(Li2SO4·K2SO4), and picromerite. Pitzer model of electrolyte solution was used to check the obtained solubilities, data comparison gives good agreement.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1997年第6期545-552,共8页
Acta Chimica Sinica
基金
国家自然科学基金资助的项目
