An investigation on the production of sodium metaborate dihydrate from ulexite by using trona and lime

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• 作者：Hakan Sert ; ^{hakansert_75@yahoo.com} ; Hü ; seyin Yı ; ldı ; ran ; Duygu Toscalı
• 关键词：Ulexite ; Trona ; Lime ; Extraction of boron ; Sodium metaborate dihydrate
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：April, 2012
• 卷：37
• 期：7
• 页码：5833-5839
• 文件大小：596 K

摘要

In this study, it was investigated the optimum conditions (extraction temperature and extraction period) for the production of sodium metaborate dihydrate (NaBO₂.2H₂O) by the reaction of ulexite (NaCaB₅O₉路8H₂O) with trona (NaHCO₃-Na₂CO₃路2H₂O) and lime (CaO). The optimum extraction conditions were determined as 50聽掳C and higher temperature; 6聽h and longer extraction time. The characterizations of the product (sodium metaborate dihydrate crystals) were performed by thermogravimetric (TG-DTG) and X-ray diffraction (XRD) analyses. In addition, the percent purity of the product was found to be 96%by using a conductometric method.