The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2003
Filed:
Jan. 24, 2001
Applicant:
Inventors:
Kyu Bum Seo, Shiheung, KR;
Young Sun Uh, Sungnam, KR;
Young Hee Kim, Seoul, KR;
Jung Yoon Han, Inchon, KR;
Sun Jin Kim, Seoul, KR;
Myung Hun Kim, Seoul, KR;
Assignee:
Myung Jin Chemical Co., Ltd., Shiheung, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G 3/00 ;
U.S. Cl.
CPC ...
C01G 3/00 ;
Abstract
A method for recycling copper oxide includes: a first step in which a sodium hydroxide aqueous solution is added to acidic copper chloride waste etchant produced in the PCB industry, to obtain copper hydroxide slurry; and a second step in which the slurry obtained in the first step is heated and sintered to thereby prepare a needle-form copper oxide. Since copper oxide has a purity of more than 99.0 wt % and the needle-form crystal morphology, so that it has an excellent filtering ability and homogeneous particle size distribution.