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Treatment method of zinc oleate-containing waste residues produced by synthesis of quantum dots

A treatment method and technology of quantum dots, applied in the separation/purification of carboxylic acid compounds, organic chemistry, etc., can solve problems such as difficult to treat waste residue and environmental pollution, and achieve the effect of convenient treatment

Active Publication Date: 2018-09-21
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the synthesis of quantum dots usually produces a non-fluid waste residue containing a large amount of zinc oleate, liquid organic matter, and a small amount of quantum dot solids
It is difficult for waste companies to dispose of this waste residue, and the discharge of this waste residue into the environment will cause environmental pollution

Method used

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  • Treatment method of zinc oleate-containing waste residues produced by synthesis of quantum dots

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] At the first temperature of 90° C., 100 g of waste residue and 500 ml of n-heptane were mixed and subjected to steam reflux treatment, so that the waste residue was dispersed in n-heptane to form a first dispersion system. The zinc oleate in the waste residue is dispersed into the first dispersion system in the form of small droplets; the quantum dots are dissolved in the liquid phase.

[0018] 500 ml of ethanol was added to the first dispersion to form a second dispersion. In this way, the quantum dots are precipitated to form an insoluble solid. Zinc oleate is still dispersed into the second dispersion in the form of small droplets. The second dispersion was centrifuged at 50° C., the centrifugation speed was 4500 rpm, and the centrifugation time was 3 minutes. In this way, the quantum dots are separated from the second dispersion, and the zinc oleate is in the liquid.

[0019] The centrifuged liquid was left standing at 4°C, and zinc oleate was precipitated from t...

Embodiment 2

[0021] At the first temperature of 100° C., 150 g of waste residue and 500 ml of n-octane were mixed and subjected to steam reflux treatment, so that the waste residue was dispersed in n-octane to form a first dispersion system. The zinc oleate in the waste residue is dispersed into the first dispersion system in the form of small droplets; the quantum dots are dissolved in the liquid phase.

[0022] 800 ml of ethanol was added to the first dispersion to form a second dispersion. In this way, the quantum dots are precipitated to form an insoluble solid. Zinc oleate is still dispersed into the second dispersion in the form of small droplets. The second dispersion was centrifuged at 50° C., the centrifugation speed was 4500 rpm, and the centrifugation time was 3 minutes. In this way, the quantum dots are separated from the second dispersion, and the zinc oleate is in the liquid.

[0023] The centrifuged liquid was left standing at 4°C, and zinc oleate was precipitated from th...

Embodiment 3

[0025] At the first temperature of 110°C, 100g of waste residue and 200ml of 2,2,2-trimethylpentane were mixed and subjected to steam reflux treatment, so that the waste residue was dispersed in 2,2,2-trimethylpentane to form The first dispersion system. The zinc oleate in the waste residue is dispersed into the first dispersion system in the form of small droplets; the quantum dots are dissolved in the liquid phase.

[0026] 600 ml of isopropanol was added to the first dispersion to form a second dispersion. In this way, the quantum dots are precipitated to form an insoluble solid. Zinc oleate is still dispersed into the second dispersion in the form of small droplets. The second dispersion was centrifuged at 60°C with a centrifugation speed of 4500 rpm and a centrifugation time of 3 minutes. In this way, the quantum dots are separated from the second dispersion, and the zinc oleate is in the liquid.

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Abstract

The invention discloses a treatment method of zinc oleate-containing waste residues produced by synthesis of quantum dots. The method comprises the following steps: step 1), dispersing the waste residues into liquid-state alkane at first temperature to form a first dispersion system; step 2), adding alcohol to the first dispersion system to form a second dispersion system; and step 3), separatingthe second dispersion system at second temperature, wherein zinc oleate is separated from the second dispersion system, and the second temperature is lower than the first temperature. According to themethod disclosed by the invention, by using liquid-state alkane and alcohol, most of zinc oleate in the waste residues can be conveniently separated out, so that waste treatment companies can conveniently treat residual wastes.

Description

technical field [0001] The application belongs to the field of preparation of quantum dots, and in particular relates to a method for treating oleic acid-containing zinc waste generated by synthesizing quantum dots. Background technique [0002] Quantum dots, also known as semiconductor nanocrystals, have a very narrow half-width of the emission spectrum, so they have a very wide range of uses in the fields of display and biomarkers. [0003] However, the synthesis of quantum dots usually produces a non-fluid waste residue containing a large amount of zinc oleate, liquid organic matter, and a small amount of quantum dot solids. It is difficult for waste companies to dispose of such waste residues, and discharge of such waste residues into the environment causes environmental pollution. Thus, there is an urgent need to handle this waste slag easily. Contents of the invention [0004] In view of the above-mentioned technical problems, the present application provides a tre...

Claims

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Application Information

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IPC IPC(8): C07C51/48C07C51/42C07C57/12
CPCC07C51/42C07C51/48C07C57/12
Inventor 王允军张龙珠朱凯文马其玉
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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