A kind of method for improving the carbonization efficiency of lithium carbonate
A lithium carbonate, efficient technology, applied in the direction of lithium carbonate;/acid carbonate, reagents, educts, etc., to achieve the effect of improving conversion efficiency and shortening reaction time
Active Publication Date: 2016-08-03
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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Even when the reaction time is extended to 150min, the conversion efficiency of lithium carbonate is only 79.2%.
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[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, the embodiments are provided to explain the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to particular intended uses.
[0018] The present invention uses lithium carbonate coarse product slurry as raw material, and prepares lithium bicarbonate solution through supergravity technology. Through the investigation of material concentration, gas flow rate, high-speed rotary packed bed speed and feed rate, a fast and efficient preparation method for lithium bicarbonate solution is obtained.
[0019] The present invention adopts the counter-current ...
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The invention relates to the technical field of chemical industry separation and purification, in particular to a method for increasing the lithium carbonate carbonization efficiency. The method includes the following steps that a lithium carbonate raw product is obtained and dissolved in distilled water to prepare lithium carbonate slurry with the material concentration of 30-90g / L; the slurry enters a rotating packed bed, CO2 gases are fed into the rotating packed bed, and carbonization reaction is performed for 40-150 minutes to obtain a material liquid; the feeding speed of the slurry is controlled to be 100-450mL / min, and the rotating speed of the rotating packed bed is controlled to be 30-50Hz; the CO2 gas flow is controlled to be 0.02-0.20m3 / L; the material liquid is subjected to solid-liquid separation to obtain a lithium hydrogencarbonate solution. According to the method for increasing the lithium carbonate carbonization efficiency, a supergravity technology is combined, the high-speed rotating packed bed is used as a reaction device, compared with methods in the prior art, the method can greatly increase the converting efficiency of lithium carbonate to lithium hydrogencarbonate through adjustment of reaction conditions in the lithium carbonate carbonation process, and meanwhile, the reaction time can be shortened.
Description
technical field [0001] The invention relates to the technical field of separation and purification of chemical industry, in particular to a carbonization method of lithium carbonate. Background technique [0002] The preparation of high-purity lithium carbonate usually takes lithium carbonate crude product slurry as raw material, and passes into it by CO 2 A carbonization reaction occurs to obtain a lithium bicarbonate solution, which is then subjected to an ion exchange resin removal step, and then a high-purity lithium carbonate product is obtained through a pyrolysis reaction. Therefore, the preparation of lithium bicarbonate solution is a necessary process for the preparation of high-purity lithium carbonate. How to improve the conversion efficiency of crude lithium carbonate to lithium bicarbonate process, and shorten this conversion time is a subject that must be considered in the preparation of lithium bicarbonate solution. [0003] In Dai Zhifeng's graduate thesis ...
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IPC IPC(8): C01D15/08
CPCY02P20/141
Inventor 邓小川霍闪卿彬菊朱朝梁温现明史一飞邵斐黄泽洲
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI