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Impurity removal process for lithium sulfate purified liquid

A technology of lithium sulfate and process, applied in the direction of lithium sulfate/sulfite, lithium carbonate;/acid carbonate, etc., can solve the problems of poor quality of lithium carbonate products

Inactive Publication Date: 2021-07-06
四川恩特普环保科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to: provide a kind of lithium sulfate purification complete liquid impurity removal process, solve existing lithium sulfate purification complete liquid to exist the small particle impurity of calcium carbonate, magnesium carbonate insoluble matter and calcium sulfate slightly soluble matter, Ca 2+ Impurities, leading to the problem of poor quality of subsequent lithium carbonate products

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  • Impurity removal process for lithium sulfate purified liquid
  • Impurity removal process for lithium sulfate purified liquid
  • Impurity removal process for lithium sulfate purified liquid

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Embodiment Construction

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0022] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses an impurity removal process for a lithium sulfate purified liquid, belongs to the technical field of lithium sulfate preparation, and aims to provide an impurity removal process for a lithium sulfate purified liquid to solve the problem that the existing lithium sulfate purified liquid contains small-particle impurities and Ca<2+> impurities of insoluble substances such as calcium carbonate and magnesium carbonate and slightly soluble substances such as calcium sulfate and the quality of subsequent lithium carbonate products is poor. The method comprises the following steps of: (1) filtering by adopting a precision filter, and filtering and intercepting insoluble substances such as calcium carbonate and magnesium carbonate and slightly soluble substances such as calcium sulfate in the lithium sulfate purified liquid; and (2) selectively adsorbing soluble Ca<2+> impurities in the lithium sulfate solution through an ion exchange resin column to finish deep purification of the lithium sulfate purified solution. The method is suitable for impurity removal of the lithium sulfate purification completion liquid.

Description

technical field [0001] The invention belongs to the technical field of lithium sulfate preparation, and in particular relates to a process for removing impurities from lithium sulfate purified liquid. Background technique [0002] Due to technological defects in the existing lithium sulfate preparation process, the purification process of the lithium sulfate solution is not thorough enough, and the resulting purified solution contains CaCO 3 , MgCO 3 , Mg(OH) 2 , Fe(OH) 3 Insoluble substances such as CaSO 4 and other slightly soluble substances. The main reason for this is that the small particles filtered through the purification solution gradually expand during the evaporation process, or after evaporation, the concentration gradually increases and then precipitates out. At the same time, soluble Ca will be produced during the purification process. 2+ , so that the calcium content in the finally prepared lithium sulfate exceeds the standard, and there is a problem of ...

Claims

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Application Information

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IPC IPC(8): C01D15/06C01D15/08
CPCC01D15/06C01D15/08
Inventor 郭定江郭乾勇蔡松林唐旭东梁志饶赵宏凌
Owner 四川恩特普环保科技有限公司
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