Rosenberg, Klein & Lee
Method for treating waste printed circuit boards with molten mixture of inorganic salts
 A method for treating waste printing circuit boards with molten mixture of inorganic salts comprising actions of: (1) putting the circuit boards into the molten inorganic salts contained in a treating furnace; (2) crushing and stirring for copper foil of the circuit boards to be separated therefrom; (3) further stirring to separate the foil from the plastic and the glass fiber of the circuit boards; (4) scraping the floating residues of the plastic and the glass fiber on upper surface of the molten inorganic salts with a floating residues scraping device; (5) collecting the carbonized plastic residues and the glass fiber; (6) converting waste gas produced in the process into an unharmful and stable one; and (7) removing the copper foil by a certain amount regularly with a removing device. 
Cleanenv' Engineeering Consultant Co., Ltd.
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Wei-Hsin Kuo-Ching Kuo-Jer Gow-Guang
Li Chang Hwang Goan