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A kind of method of processing fluoroethylene carbonate solid waste

A fluoroethylene carbonate, waste residue technology, applied in organic chemistry, alkali metal halide purification, alkali metal chloride and other directions, can solve the problems of slow heating speed, uneven heating, cumbersome process, etc., to achieve fast heating speed, The effect of uniform heating and reduced processing steps

Active Publication Date: 2022-05-24
江苏瀚康新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of organic matter and other substances in solid waste, this process often leads to uneven heating, slow heating speed, extremely easy to produce agglomerates attached to the equipment wall, difficult to clean, and requires multiple crystallization and decolorization, the process is too cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take a crucible with a net weight of 107.8g, add 70g of fluoroethylene carbonate waste residue, put it in a 300 ℃ far-infrared device for thermal decomposition for 2 hours, the fluoroethylene carbonate waste residue changes from brown to black, take out the black residue and weigh 58.9g , add 104g of 80 ℃ hot water (containing 5.9g of potassium hydroxide), after stirring for 0.5h, the mother liquor is concentrated after suction filtration, and crystallized at room temperature to obtain 45.2g of wet crystals, which are dried in far-infrared equipment to obtain dry 36.1g of crystals, the color is slightly yellowish. Add 15g of 75°C hot water to the crystals, stir and dissolve for 0.5h, cool to room temperature to crystallize and wash with cold water to obtain 30.5g of wet crystals, which are dried in a small far-infrared device to obtain 24.4g of dry crystals, which are qualified by-products Potassium chloride (99.94% pure).

Embodiment 2

[0021] Take a crucible with a net weight of 210.6g, add 100g of fluoroethylene carbonate waste residue, put it in a 310°C far-infrared device for thermal decomposition for 1.5h, the fluoroethylene carbonate waste residue changes from brown to black, take out the black residue and weigh it to 85.5 g, add 145g of 80°C hot water (containing 9.5g of potassium hydroxide), stir for 1h, concentrate the mother liquor after suction filtration, and crystallize at room temperature to obtain 66.2g of wet crystals, which are dried in a far-infrared device to obtain dry Crystal 53.0g, the color is slightly yellowish. Add 25g of 80°C hot water to the crystals, stir and dissolve for 1 hour, cool to room temperature to crystallize and wash with cold water to obtain 45.7g of wet crystals, which are dried in a small far-infrared device to obtain 36.3g of dry crystals, which are qualified by-product chlorine Potassium chloride (99.95% pure).

Embodiment 3

[0023] Take a crucible with a net weight of 215.3g, add 140g of fluoroethylene carbonate waste residue, put it into a 320°C far-infrared device for thermal decomposition for 1 hour, the fluoroethylene carbonate waste residue changes from brown to black, take out the black residue and weigh 122.7g , add 192g of 80 ℃ hot water (containing 12.3g of potassium hydroxide), after stirring for 1h, the mother liquor is concentrated after suction filtration, and crystallized at room temperature to obtain 106.2g of wet crystals, which are dried in far-infrared equipment to obtain dry crystals 85.8g, the color is slightly yellowish. Add 40g of 70°C hot water to the crystals, stir and dissolve for 1 hour, cool to room temperature to crystallize and wash with cold water to obtain 78.6g of wet crystals, which are dried in a small far-infrared device to obtain 62.9g of dry crystals, which are qualified by-product chlorine. Potassium chloride (99.96% pure).

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Abstract

The invention discloses a method for treating fluoroethylene carbonate solid waste, comprising the following steps: 1) heating and decomposing fluoroethylene carbonate waste residue at a certain temperature in an infrared device; 2) adding an appropriate amount to the decomposed waste residue The hot water containing a certain amount of potassium hydroxide, stirred and dissolved, concentrated and then crystallized at room temperature for the first time; 3) After the first crystallization was drained, added to clean water, heated to a certain temperature, stirred and dissolved, and concentrated 4) drying the second crystallization at a certain temperature in an infrared device to obtain the by-product potassium chloride. The method for treating fluoroethylene carbonate solid waste provided by the invention adopts far-infrared equipment for preheating, the heating is uniform, the heating speed is fast, the organic matter in the solid slag can be removed, and it is not easy to agglomerate. processing steps, correspondingly reducing processing costs.

Description

technical field [0001] The invention relates to the field of lithium ion battery electrolyte additives, in particular to the purification and production efficiency of potassium chloride as a by-product of lithium battery additives. Background technique [0002] Fluoroethylene carbonate (FEC) is an important electrolyte additive for lithium-ion batteries, which can improve the low temperature performance of the electrolyte. Potassium chloride can be used in the inorganic industry and is the basic raw material for the manufacture of various potassium salts such as potassium hydroxide, potassium sulfate, potassium nitrate, potassium chlorate, potassium red alum, etc. drug. The dye industry is used to produce G salt, reactive dyes, etc. In agriculture, it is a very effective potash fertilizer with fast fertilizer effect. It can be directly applied to farmland, which can increase the moisture in the lower soil layer and has the effect of drought resistance. [0003] Potassium c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/42
CPCC01D3/14C01D3/04C01P2006/80
Inventor 傅圣超姚双开陈宇孙西船朱会文孔令文
Owner 江苏瀚康新材料有限公司
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