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A kind of method that recovers lithium from pps catalyst waste residue

A catalyst and lithium recovery technology, applied in chemical recovery, lithium halide, alkali metal chloride and other directions, can solve the problems of high recovery cost, complex process, low recovery rate, etc., and achieve reduced recovery cost, simple process requirements, and recovery rate. high effect

Active Publication Date: 2020-07-14
TIANQI LITHIUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defects of low recovery rate, secondary pollution, high recovery cost and complicated process in the prior art, the present invention provides a method for recovering lithium from PPS catalyst waste residue. The method not only recovers lithium High efficiency, simple process, easy operation, low recycling cost and no pollution

Method used

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  • A kind of method that recovers lithium from pps catalyst waste residue

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Experimental program
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Effect test

Embodiment 1

[0029] (1) First mix the PPS catalyst waste residue and absolute ethanol in a container at a solid-to-liquid ratio of 1:1, stir and mix thoroughly at 30°C, react for 2 hours, and filter to obtain solid and liquid phases respectively;

[0030] (2) Mix the solid obtained in step (1) with tap water in a container at a solid-to-liquid ratio of 1:1, fully stir and mix at 50°C, react for 3 hours, and filter to obtain solid and liquid phases respectively;

[0031] (3) Concentrate the liquid obtained in step (2) by evaporation, filter after cooling, and dry the obtained solid;

[0032] (4) Mix the solid obtained in step (3) with absolute ethanol in a container at a solid-to-liquid ratio of 1:1, stir and mix thoroughly at 30°C, react for 2 hours, and filter to obtain solid-liquid phases respectively ;

[0033] (5) Mix the liquid obtained in step (4) with the liquid obtained in step (1), and spray dry to obtain a qualified lithium chloride product;

[0034] (6) The solid obtained in s...

Embodiment 2

[0037] (1) First mix the PPS catalyst waste residue and absolute ethanol in a container at a solid-to-liquid ratio of 1:2, stir and mix thoroughly at 40°C, react for 3 hours, and filter to obtain solid-liquid phases respectively;

[0038] (2) Mix the solid obtained in step (1) with tap water in a container at a solid-to-liquid ratio of 1:2, stir and mix thoroughly at 30°C, react for 2 hours, and filter to obtain solid and liquid phases respectively;

[0039](3) Concentrate the liquid obtained in step (2) by evaporation, filter after cooling, and dry the obtained solid;

[0040] (4) Mix the solid obtained in step (3) with absolute ethanol in a container at a solid-to-liquid ratio of 1:2, stir and mix thoroughly at 30°C, react for 2 hours, and filter to obtain solid-liquid phases respectively ;

[0041] (5) Mix the liquid obtained in step (4) with the liquid obtained in step (1), and spray dry to obtain a qualified lithium chloride product;

[0042] (6) The solid obtained in s...

Embodiment 3

[0045] (1) First mix the PPS catalyst waste residue and absolute ethanol in a container at a solid-to-liquid ratio of 1:2, stir and mix thoroughly at 40°C, react for 3 hours, and filter to obtain solid-liquid phases respectively;

[0046] (2) Mix the solid obtained in step (1) with tap water in a container at a solid-to-liquid ratio of 1:3, stir and mix thoroughly at 30°C, react for 3 hours, and filter to obtain solid and liquid phases respectively;

[0047] (3) Concentrate the liquid obtained in step (2) by evaporation, filter after cooling, and dry the obtained solid;

[0048] (4) Mix the solid obtained in step (3) with absolute ethanol in a container at a solid-to-liquid ratio of 1:2, stir and mix thoroughly at 30°C, react for 2 hours, and filter to obtain solid-liquid phases respectively ;

[0049] (5) Mix the liquid obtained in step (4) with the liquid obtained in step (1), and spray dry to obtain a qualified lithium chloride product;

[0050] (6) The solid obtained in ...

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Abstract

The invention discloses a method for recycling lithium from PPS catalyst waste residues. The method comprises the following steps: Step 1, mixing the PPS catalyst waste residues with anhydrous ethanolor an anhydrous ethanol-containing solution, and filtering the mixture after the reaction, thereby obtaining a solid and liquid; Step 2, mixing the solid obtained by the step 1 with water, and filtering the mixture after the reaction, thereby obtaining a solid and liquid; Step 3, concentrating and filtering the liquid obtained in Step 2, thereby obtaining a solid, and drying the obtained solid; Step 4, mixing the dried solid in Step 3 with the anhydrous ethanol or the anhydrous ethanol-containing solution, and filtering the mixture after the reaction, thereby obtaining a solid and liquid; Step 5, recycling the liquid obtained in Step 1 and Step 4, wherein the obtained liquid is lithium chloride; Step 6, recycling the solid obtained in Step 4, wherein the obtained solid is sodium chloride.The method is high in lithium recycling rate and is simple in process, easy to operate, low in recycling cost and pollution-free.

Description

technical field [0001] The invention relates to a method for recovering lithium, in particular to a method for recovering lithium from PPS catalyst waste residue. Background technique [0002] PPS (Chinese name: polyphenylene sulfide) is a thermoplastic special engineering plastic. During the production process, lithium chloride needs to be added as a production aid, and lithium chloride is not consumed during the production process. Finally, together with other products, Discharge as waste. A lot of research has been done on the recovery technology of this part of lithium chloride at home and abroad. [0003] The publication number is CN101205298, and the publication date is that the Chinese invention patent application on June 25, 2008 discloses that adding a large amount of water to the rectification raffinate produced in the production process of PPS resin can settle, separate and recycle PPS oligomers, separate The obtained filtrate is removed from impurities, includi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D15/04C01D3/04
CPCC01D3/04C01D15/04C01P2006/60Y02P20/584
Inventor 曹乃珍高洁陶帅徐川肇巍何霞
Owner TIANQI LITHIUM CORP