A method for recycling waste liquid from quantum dot purification

A waste liquid recovery and quantum dot technology, which is applied in chemical instruments and methods, separation methods, liquid separation, etc., can solve the problems of cumbersome and complicated recycling methods and high recycling costs

Active Publication Date: 2021-12-10
南通昇纳光学技术有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the embodiments of the present application is to provide a method for recycling waste liquid from quantum dot purification, so as to improve the problem that "the current method of recycling waste liquid from quantum dot purification is relatively cumbersome and complicated, and will cause high recycling costs"

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  • A method for recycling waste liquid from quantum dot purification
  • A method for recycling waste liquid from quantum dot purification

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0029] For the recovery of the waste liquid produced by quantum dot purification, the commonly used recovery methods are to use azeotropic distillation, extractive distillation and membrane separation to extract the alkanes and alcohols in the waste liquid respectively. Alkanes and alcohols are then reconstituted for subsequent purification. This method is more cumbersome and complicated, and will result in higher recycling costs.

[0030] In view of the above problems, the inventors of the present application propose the following embodiments to solve the above problems after research and exploration.

[0031] see figure 1 , the embodiment of the present application provides a method for recycling quantum dot purification waste liquid, the method includes: step S101-step S103.

[0032] Step S101...

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Abstract

The application provides a method for recycling quantum dot purification waste liquid, the method comprising: obtaining quantum dot purification waste liquid; wherein, the quantum dot purification waste liquid includes alkanes and alcohols; distilling the quantum dot purification waste liquid to obtain alkane and Alcohol mixture; place the quantum dots to be purified in the mixture for purification. In the embodiment of this application, by distilling the quantum dot purification waste liquid, the azeotrope formed by the alkane and alcohol during the distillation process can be distilled together, and then the mixture of alkane and alcohol can be directly used for subsequent treatment Purification of quantum dots. Compared with the separate separation of alkanes and alcohols in the prior art, the present application can directly separate the mixture of alkanes and alcohols together, and use the mixture of alkanes and alcohols for subsequent purification of quantum dots. Through the above method, firstly, the recycling process is optimized, and the recycling process is simpler and more efficient; secondly, the cost of recycling is reduced; thirdly, this method is more environmentally friendly.

Description

technical field [0001] The present application relates to the technical field of quantum dot preparation, in particular, to a method for recycling and utilizing quantum dot purification waste liquid. Background technique [0002] At present, the purification of quantum dots will produce a large amount of waste liquid, such as using the reprecipitation method to purify quantum dots, and the waste liquid will contain alkanes, alcohols, and non-coordinating solvents used in the synthesis of quantum dots such as ODE (Octadecene, Octadecene), and a small amount of unreacted high-boiling precursors and incompletely precipitated quantum dots. And because the used alkane and alcohol are included in the waste liquid, the waste liquid can be recycled. Currently, the commonly used recovery methods are azeotropic distillation, extractive distillation and membrane separation to extract the alkanes and alcohols in the waste liquid respectively. Alkanes and alcohols are then reconstitute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/00B01D17/022C09K11/00C09K11/08
CPCB01D3/00B01D17/0202C09K11/08C09K11/00
Inventor 俞静伟储彬彬刘世霞吴志强
Owner 南通昇纳光学技术有限公司
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