Abstract translation:公开了一种硫酸锂的制备方法。 在本发明的一个实施方案中,提供了一种硫酸锂的制备方法,其包括:将磷酸锂(Li 3 PO 4)注入到其中不溶于硫酸锂的溶剂中的步骤; 将硫酸(H 2 SO 4)注入溶剂的步骤; 由于磷酸锂和硫酸之间的反应而产生磷酸(H 3 PO 4),提取硫酸锂(Li 2 SO 4)的步骤。 以及分离萃取的硫酸锂的步骤。 在本发明的一个实施方案中,提供了使用有机溶剂立即提取硫酸锂并且通过使用硫酸代替其它阳离子来防止二次污染的硫酸锂的制备方法。 此外,本发明的方法使用乙醇作为具有低蒸馏温度的溶剂,以使残余溶液中的磷酸能够回收。
Abstract:
The present invention relates to a method for extracting potassium from brine and, more specifically, to a method for efficiently extracting potassium chloride or potassium sulfate from brine containing a large amount of sulfate ions. The method for extracting potassium from brine according to the present invention comprises the steps of preparing the brine; evaporating the moisture in the brine; and obtaining a precipitate by section according to the evaporated amount of moisture.
Abstract:
PURPOSE: A method for preparing lithium compounds of high purity and a system using the method are provided to cost effectively prepare lithium compounds of high purity based on low energy by obtaining a lithium phosphate aqueous solution by dissolving lithium carbonate of low purity into a phosphoric acid, and electrolyzing the lithium phosphate aqueous solution. CONSTITUTION: A method for preparing lithium compounds of high purity includes the steps of: obtaining a lithium phosphate aqueous solution by dissolving lithium carbonate of 85% or less purity into a phosphoric acid; and obtaining lithium hydroxide by electrolyzing the lithium phosphate aqueous solution. The purity of the lithium compound is more than or equal to 99.5%. The step of obtaining a lithium phosphate aqueous solution includes the steps of: washing lithium carbonate of 85% or less purity with water; and obtaining a lithium phosphate aqueous solution by dissolving the washed lithium carbonate into a phosphoric acid. The electrolyzing step is performed under the current density of 0.01-0.075A/cm^2 and the electrolysis temperature of 15-25°C. The method further includes a step of forming lithium carbonate by generating a reaction between lithium hydroxide and a carbonation gas or a material containing carbonate. A system for preparing lithium compounds of high purity includes a dissolving unit and an electrolyzing unit.
Abstract:
염화 리튬 수용액의 제조 방법, 수산화 리튬의 제조 방법 및 탄산 리튬의 제조 방법에 관한 것으로, 리튬을 포함하는 고상의 원료 물질을 준비하는 단계; 상기 리튬을 포함하는 고상의 원료 물질과 염소 원료 물질을 혼합 후 가열하는 단계; 상기 가열 단계에 의해, 발생하는 기체 상의 염화 리튬을 응축시켜 응축 염화 리튬을 수득하는 단계; 및 상기 응축된 염화 리튬을 염화 리튬 수용액으로 전환하는 단계;를 포함하는 염화 리튬 수용액의 제조 방법을 제공할 수 있다.