Lithium adsorbent forming process using sponge as vector

A molding process and lithium adsorption technology, which is applied in the field of lithium adsorbent molding process, can solve the problems of inability to measure the content of the adsorbent in the pores, difficult operation, and small adsorption capacity of the adsorbent, and achieves short adsorption time, increased effective components, and adsorption. large amount of effect

Active Publication Date: 2011-08-24
浙江海钛新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is difficult to operate and cannot measure the content of effective adsorbent in the pores, so the adsorption capacity of the adsorbent is small.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First add 30g of MnO2 solid into a 100mL crucible, then add 10.41g of LiCl·H2O, mix well, add 10mL of deionized water, heat to 50°C on an electric furnace, and stir for 1h. Put the crucible into the muffle furnace, set the temperature at 200°C, calcinate for 3 hours, take out the crucible after 3 hours, and crush the solid adsorbent to obtain the precursor LiMn2O4. According to the proportion of the sponge formula, the powdered adsorbent with a mass fraction of 10% is added, mixed and foamed with the sponge foaming raw material, and the foamed sponge adsorbent is obtained. Use 0.1mol / L hydrochloric acid to carry out pickling for 0.5h, and the pickling rate reaches 75%. The sponge after pickling is put into brine for adsorption experiment, and the adsorption capacity is 2.5mg / g as determined by flame photometer.

Embodiment 2

[0025] First add 30g of MnO2 solid to a 100mL crucible, weigh 9.37g of LiCl H2O and dissolve it in 20mL of water, add the lithium chloride solution into the crucible and mix it with manganese dioxide, then place the crucible on an electric furnace and heat it to 80°C, stirring for 0.5 h. Put the crucible into the muffle furnace, set the temperature at 500°C, calcinate for 2 hours, take out the crucible after 2 hours, and crush the solid adsorbent to obtain the precursor LiMn2O4. According to the proportion of the sponge formula, the powdered adsorbent with a mass fraction of 20% is added, mixed and foamed with the sponge foaming raw material, and the foamed sponge adsorbent is obtained. Use 0.2mol / L hydrochloric acid to pickle for 0.5h, and the pickling rate reaches 80%. The sponge after pickling is put into brine for adsorption experiment, and the adsorption amount is 2.6mg / g as determined by flame photometer.

Embodiment 3

[0027] First, add 30g of MnO2 solid into a 100mL crucible, weigh 12.49g of LiCl H2O and dissolve it in 20mL of water, add the lithium chloride solution into the crucible and mix it with manganese dioxide, then place the crucible on an electric furnace and heat it to 90°C, stirring for 0.5 h. Put the crucible into the muffle furnace, set the temperature at 800°C, calcinate for 1 hour, take out the crucible after 1 hour, and crush the solid adsorbent to obtain the precursor LiMn2O4. According to the proportion of the sponge formula, the powdered adsorbent with a mass fraction of 40% is added, mixed and foamed with the sponge foaming raw material, and the foamed sponge adsorbent is obtained. 0.2mol / L hydrochloric acid was used for pickling for 0.5h, and the pickling rate reached 81%. The sponge after pickling was put into brine for adsorption experiment, and the adsorption amount was 2.8mg / g as determined by flame photometer.

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PUM

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Abstract

The invention provides a lithium adsorbent forming process using sponge as a vector, and relates to a lithium adsorbent forming method which is used for adsorbing lithium in salt lake brine, seawater, well brine and other lithium-containing solutions. The forming process comprises the following steps: foaming powdered adsorbent and a sponge raw material, wherein the chemical characteristics of the adsorbent are not changed in the foaming process; and preparing blocky sponge by the powdered adsorbent to adsorb lithium ions in the salt lake brine. The forming process has the advantages that: by the blocky sponge lithium adsorbent prepared by the process, the problems that the powdered adsorbent is easily lost and operation is hard in the adsorbing process are fundamentally solved; and the sponge lithium adsorbent has high adsorption speed, larger specific surface area and long service life.

Description

technical field [0001] The invention relates to a molding process of a powdery adsorbent used for absorbing lithium ions in salt lake brine, seawater and well brine, and mainly relates to a molding process of a lithium adsorbent with a sponge as a carrier. Background technique [0002] my country is a country with a large amount of traditional lithium resources, and also a country with a large amount of lithium resources in salt lakes. The reserves of lithium resources in salt lakes (equivalent to lithium carbonate) exceed 300,000 tons. conditions and development prospects. However, in the past, my country did not pay enough attention to the extraction of lithium from salt lakes, and there was too little technical investment. At present, there is no large-scale equipment for extracting lithium from salt lake brines, and the extraction of lithium is still concentrated in the extraction of ores. However, the limited mine resources and the increasing demand for lithium in recen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
Inventor 陈海贤董梅
Owner 浙江海钛新材料科技股份有限公司
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