Method and system for recovering crystal liquid in abandoned liquid crystal display

A liquid crystal display and recovery system technology, applied in the direction of liquid crystal materials, chemical instruments and methods, solid waste removal, etc., can solve the problem of not using supercritical fluid to extract liquid crystals, and achieve easy control of extraction parameters, saving manufacturing costs, Good effect of environmental protection characteristics
CN102500128AInactive Publication Date: 2012-06-20HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2012-06-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and a system for recovering crystal liquid in an abandoned liquid crystal display. The method is characterized in that a liquid crystal glass substrate is placed in a sealed extractor; extracting agent CO2 is introduced in to ensure that the extracting agent and the liquid crystal glass substrate fully contact; the technical condition of the sealed extractor is set to cause the extracting agent CO2 to achieve the supercritical fluid status; liquid crystal on the glass substrate is fully dissolved by the supercritical CO2 fluid; pressure is lowered to cause the supercritical fluid dissolved with liquid crystal to enter a sealed separator; the extracting agent CO2 in the supercritical fluid is converted into gas, and the liquid crystal is converted into liquid; and gaseous extracting agent CO2 and liquid crystal are respectively collected. The method and the system are economic and environmentally-friendly, have low energy consumption, and can be industrially applied to the recovery of the liquid crystal in the abandoned liquid crystal display.
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Description

technical field

[0001] The invention relates to a device for recovering liquid crystals from waste liquid crystal displays. Background technique

[0002] Liquid crystal is a kind of polymer material. Because of its special physical and chemical properties and optical properties, it has been widely used in thin and light display technology since the middle of the 20th century. Liquid crystal display (LCD) has the advantages of small size, micro radiation, low power consumption, and more display information, and is widely used in electronic and electrical products such as TVs, computers, mobile phones, GPS, PDAs, game consoles, automobiles, and instruments. According to foreign research reports, the sales volume of small and medium-sized LCD screens in the world was 3.8 billion in 2007, and it is expected to grow to 4.5 billion by 2011. Liquid crystal display screens are generally used in electronic and electrical products with a faster replacement speed, and their life cycle...

Claims

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