| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for preparing a high purity copper oxide from waste liquid containing Cu(NH<SB>3</SB>)<SB>4</SB>Cl<SB>2</SB>. Ž<P>SOLUTION: The method for preparing high purity copper oxide containing a trace amount of chlorine from waste liquid containing Cu(NH<SB>3</SB>)<SB>4</SB>Cl<SB>2</SB>comprises the steps of: (a) filtering off impurities from the waste liquid containing Cu(NH<SB>3</SB>)<SB>4</SB>Cl<SB>2</SB>by using a micro-filter; (b) mixing materials made from chemicals that may generate a large amount of air bubbles and a sodium hydroxide solution, heating the mixture solution so that the temperature of the mixture solution is kept at a predetermined level until the reaction finishes, adding the waste liquid containing Cu(NH<SB>3</SB>)<SB>4</SB>Cl<SB>2</SB>to the mixture solution, and aging the resultant mixture solution added with the waste liquid over a predetermined period of time; and (c) filtering, washing, and dehydrating the product obtained in the step (b), and heating and drying the product while being supplied with air. The method for preparing copper oxide generates porous copper oxide having a wide specific surface area to enable the easy removal of a chlorine compound, and thus prepares high quality copper oxide which has a chlorine content of 5 ppm or less, a purity of 99.5% or higher, and a superior acid solubility. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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