Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Reexamination Certificate
2003-04-18
2008-09-23
Wood, Elizabeth D (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
C502S233000, C502S234000, C502S240000, C502S243000, C502S244000, C502S250000, C502S253000, C549S325000
Reexamination Certificate
active
07427579
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)MnO2(c)SiO2(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.
REFERENCES:
patent: 5294583 (1994-03-01), Pohl et al.
patent: 5347021 (1994-09-01), Taylor et al.
patent: 5536849 (1996-07-01), Bergfeld et al.
patent: 5698713 (1997-12-01), Lancia et al.
patent: 6008375 (1999-12-01), Bergfeld et al.
patent: 2003/0042646 (2003-03-01), Khare et al.
patent: 0528305 (1993-02-01), None
patent: 0559053 (1993-09-01), None
patent: 0591795 (1994-04-01), None
patent: 332140 (1997-08-01), None
patent: 1168220 (1969-10-01), None
patent: 2002-8600 (2002-01-01), None
Choi Nak-Mo
Han Yo-Han
Jeong Suk-Jong
Kim Hyung-Rok
Kim In-Ki
Ackyung Petrochemical Co., Ltd.
Korea Research Institute of Chemical Technology
Pearl Cohen Zedek Latzer LLP
Wood Elizabeth D
LandOfFree
Hydrogenation catalyst, preparation thereof, and method for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrogenation catalyst, preparation thereof, and method for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrogenation catalyst, preparation thereof, and method for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3986009