Method for preparing high-purity lithium carbonate from boron-containing crude lithium carbonate

• Main Authors: YAN JIAN, ZHOU YOUCHI, ZENG WEIYONG, YAN ZHIHUI, ZHANG ZHONGDA
• Format: Patent
• Language: Chinese; English
• Published: 20.10.2023
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; INORGANIC CHEMISTRY; METALLURGY

The invention provides a method for preparing high-purity lithium carbonate from boron-containing crude lithium carbonate, and belongs to the technical field of chemical engineering. The method for preparing the high-purity lithium carbonate from the boron-containing crude lithium carbonate comprises the following process steps: ultrasonic washing, dissolving to remove boron, filtering and concentrating to prepare the high-purity lithium carbonate. According to the method, a large number of impurities in the boron-containing crude lithium carbonate raw material are removed after ultrasonic washing, the technological process is short, operation is easy, the prepared lithium carbonate belongs to battery-grade lithium carbonate, and green and efficient purification and utilization of the boron-containing crude lithium carbonate are achieved. 本发明就是要提供一种含硼粗碳酸锂制备高纯碳酸锂的方法，属于化工技术领域。本发明从含硼粗碳酸锂制备高纯碳酸锂，采用如下工艺步骤：超声洗涤、溶解除硼、过滤浓缩、制备高纯碳酸锂。本发明通过超声洗涤后，去除含硼粗碳酸锂原料中的大量杂质，工艺流程短，易于操作，且制成的碳酸锂属于电池级碳酸锂，实现了含硼粗碳酸锂的绿色、高效提纯利用。