Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2011-05-31
2011-05-31
Witherspoon, Sikarl A (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S878000, C502S307000, C502S329000, C502S343000
Reexamination Certificate
active
07951976
ABSTRACT:
Several metal-supported catalyst compositions based on nano-crystalline zinc oxide were synthesized and characterized by X-ray powder diffraction (XRD), Carbon dioxide temperature programmed desorption (CO2TPD), and nitrogen adsorption at −196° C. The Pd-supported nano-ZnO mixed with different oxides such as Cr2O3, CrO3, MgO, and γ-Al2O3showed high catalytic activity in acetone condensation in gas-phase process under hydrogen flow. This reaction involves the base-acid coupling of acetone to form mesityl oxide, followed by its hydrogenation to methyl isobutyl ketone (MIBK). The novel catalyst 1% wt. n-Pd
-ZnCr2O4was utilized during gas-phase reaction during production of MIBK. MIBK selectivity was 70-72% at 66-77% acetone conversion at 300-350° C. Diisobutyl ketone (DIBK) was the main by-product, with a total MIBK+DIBK selectivity up to 88%. The prepared catalysts showed stable activity and may be used repeatedly and for a longer period of time.
REFERENCES:
patent: 5811365 (1998-09-01), Barry
patent: 7482382 (2009-01-01), Li et al.
patent: 2010/0135937 (2010-06-01), O'Brien et al.
patent: 2011/0002970 (2011-01-01), Parashar
Fahd Al-Wadaani et al., Pd supported on ZnII-CrIII mixed oxide as a catalyst for one-step synthesis of methyl isobutyl ketone, Journal of Catalysis 2008, vol. 257, 199-205.
Elena F. Kozhevnikova et al.,One-step synthesis of methyl isobutyl ketone from acetone catalysed by Pd supported on ZnII-CrIII mixed oxide, Journal of Catalysis 2006, vol. 238, 286-292.
Akhmedov Vagif Melik
Al-Rabiah Abdulrahman
Bagabas Abdulaziz Ahmed
Mostafa Mohamed Mokhtar Mohamed
Geeta Kadambi Riddhi IP LLC
King Abdulaziz City for Science and Technology (KACST)
Witherspoon Sikarl A
LandOfFree
Synthesizing and utilizing novel nano crystalline zinc... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synthesizing and utilizing novel nano crystalline zinc..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesizing and utilizing novel nano crystalline zinc... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2705633