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:
Sep. 23, 2008
Filed:
Apr. 18, 2003
Jung-ho Lee, Daejeon, KR;
Hyung-rok Kim, Daejeon, KR;
Yo-han Han, Daejeon, KR;
Suk-jong Jeong, Daejeon, KR;
Nak-mo Choi, Ulsan, KR;
Hang-soo Woo, Ulsan, KR;
In-ki Kim, Ulsan, KR;
Jung-Ho Lee, Daejeon, KR;
Hyung-Rok Kim, Daejeon, KR;
Yo-Han Han, Daejeon, KR;
Suk-Jong Jeong, Daejeon, KR;
Nak-Mo Choi, Ulsan, KR;
Hang-Soo Woo, Ulsan, KR;
In-Ki Kim, Ulsan, KR;
Ackyung Petrochemical Co., Ltd., Seoul, KR;
Korea Research Institute of Chemical Technology, Daejeon, KR;
Abstract
The present invention relates to a hydrogenation catalyst represented by the following formula 1, a method for the preparation thereof, and a method for preparing gamma-butyrolactone using this catalyst. The method for preparing gamma-butyrolactone from maleic anhydride using the catalyst of the invention prepared by stabilizing the precursor particles of copper oxide, zinc oxide, and manganese oxide with a silica exhibits high selectivity, high yield, and high productivity under the operation conditions of a low molar ratio of hydrogen with regard to the reactants, and enables the preparation of gamma-butyrolactone from maleic anhydride with long-term stability without requiring frequent re-activation of the catalyst: Formula (I) CuO(a)ZnO(b)MnO(c)SiO(d) wherein a, b, c, and d are represented on the basis of weight, wherein a is 20 to 90, b is 0.01 to 10, c is 0.01 to 5, and d is 5 to 50.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile