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:
Jul. 12, 2011
Filed:
Mar. 14, 2008
Myoung-hwan OH, Daejeon, KR;
Seung-beom Cho, Daejeon, KR;
Jun-seok Nho, Daejeon, KR;
Jong-pil Kim, Daejeon, KR;
Jang-yul Kim, Daejeon, KR;
Myoung-Hwan Oh, Daejeon, KR;
Seung-Beom Cho, Daejeon, KR;
Jun-Seok Nho, Daejeon, KR;
Jong-Pil Kim, Daejeon, KR;
Jang-Yul Kim, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
In a method for preparing cerium carbonate powder by mixing a cerium precursor solution with a carbonate precursor solution and carrying out a precipitation reaction, wherein cerium carbonate is controlled to have an orthorhombic crystal structure, a hexagonal crystal structure or an orthorhombic/hexagonal mixed crystal structure, by using at least one type of organic solvent comprising at least two hydroxyl groups (OH) in molecular formula as a solvent for either or both the cerium precursor solution and the carbonate precursor solution, and varying a number of carbons or hydroxyl groups (OH) included in the molecular formula of the organic solvent. The method can easily and inexpensively obtain cerium carbonate powder with a desired crystal structure without the danger by high-temperature high-pressure and the need for an expensive system in hydrothermal synthesis.