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Study on dissolution and phase equilibrium in ulexite-water system
Chen, RY; Gao, SY; Feng, SH; Xia, SP; Chen, CL
AbstractUlexite dissolution in water has been studied in the wide temperature range from 10degreesC to 93degreesC and two higher temperatures at 120degreesC and 240degreesC. The analytical results showed that ulexite dissolved congruently from 10degreesC to 35degreesC and incongruently from 40 to 68degreesC. The solid component of ulexite, NaCaB(5)O(6)(OH)(6)(.)5H(2)O was dehydrated to form NaCaB(5)O(6)(OH)(6)(.)H(2)O from 50 to 68degreesC and finally amorphous solid at 68degreesC. This amorphous solid converted into priceite at 71degreesC and then converted completely to priceite at the boiling point(93degreesC) of the solution. At both 120 and 240degreesC, the dissolution of ulexite was an incongruent process. Above 120degreesC, ulexite became amorphous solid and then transformed into priceite. In addition to the solid to solid transformation, crystallization of priceite from the solution has also been observed. Based on our experimental results, mechanisms of dissolution, transformation, and crystallization of borate in ulexite-water system are discussed.
KeywordUlexite Dissolution Phase Equilibrium Transformation
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaChemistry
WOS SubjectChemistry, Inorganic & Nuclear
WOS IDWOS:000222365000010
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Document Type期刊论文
Affiliation1.Jiangsu Polytech Univ, Dept Chem Engn, Changzhou 213016, Peoples R China
2.Acad Sinica, Inst Salt Lakes, Xian 710043, Peoples R China
3.Jilin Univ, Key Lab Inorgan Hydrothermal Synth & Preparat, Changchun 130023, Peoples R China
4.Natl Sun Yat Sen Univ, Dept Chem, Kaohsiung 80424, Taiwan
Recommended Citation
GB/T 7714
Chen, RY,Gao, SY,Feng, SH,et al. Study on dissolution and phase equilibrium in ulexite-water system[J]. CHINESE JOURNAL OF INORGANIC CHEMISTRY,2004,20(7):812-818.
APA Chen, RY,Gao, SY,Feng, SH,Xia, SP,&Chen, CL.(2004).Study on dissolution and phase equilibrium in ulexite-water system.CHINESE JOURNAL OF INORGANIC CHEMISTRY,20(7),812-818.
MLA Chen, RY,et al."Study on dissolution and phase equilibrium in ulexite-water system".CHINESE JOURNAL OF INORGANIC CHEMISTRY 20.7(2004):812-818.
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