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:
Jun. 26, 2007
Filed:
Jul. 08, 2003
Wan-jae Myeong, Daejeon, KR;
Jin-soo Baik, Daejeon, KR;
Se-woong Park, Daejeon, KR;
Chang-mo Chung, Daejeon, KR;
Kyu-ho Song, Daejeon, KR;
Wan-Jae Myeong, Daejeon, KR;
Jin-Soo Baik, Daejeon, KR;
Se-Woong Park, Daejeon, KR;
Chang-Mo Chung, Daejeon, KR;
Kyu-Ho Song, Daejeon, KR;
Han-Wha Chemical Corporation, Seoul, KR;
Abstract
Disclosed is a process for preparing fine metal oxide particles, comprising the following steps of reacting a reactant mixture comprising i) water, ii) at least one water-soluble metal nitrate and iii) ammonia or ammonium salt at 250–700° C. under 180–550 bar for 0.01 sec to 10 min in a reaction zone to synthesize the metal oxide particles, the metal nitrate being contained at an amount of 0.01–20 wt % in the reactant mixture; and separating and recovering the metal oxide particles from the resulting reaction products. According to the present invention, nano-sized metal oxide particles are synthesized, while the harmful by-products generated concurrently therewith are effectively decomposed in the same reactor.