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METHOD FOR PURIFYING WASTE OF AQUEOUS REWORK CHEMICAL FOR LCD PANEL AND REUSING THE PURIFIED REWORK CHEMICAL
METHOD FOR PURIFYING WASTE OF AQUEOUS REWORK CHEMICAL FOR LCD PANEL AND REUSING THE PURIFIED REWORK CHEMICAL
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机译:液晶面板水返工化学废料的净化方法及再利用的方法
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摘要
PURPOSE: A method for refining and regenerating the waste liquid of aqueous retreating chemical for treating bad liquid crystal display panels is provided to cost-effectively implement operational processes by minimizing the use of raw materials. CONSTITUTION: The waste liquid of aqueous retreating chemical containing 5-30 weight% of dimethyl sulfoxide, 15-30 weight% of an aqueous amine compound, and 5-20 weight% of inorganic alkaline hydroxide is centrifuged. Water is eliminated from centrifuged supernatant based on a decompressed distilling process(33). A dissolved resin becomes sludge, and inorganic alkaline materials are precipitated. The sludge and the precipitated inorganic alkaline materials are eliminated. A filtering process with respect to the centrifuged supernatant is further implemented.
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