Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2006-03-28
2006-03-28
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S598000
Reexamination Certificate
active
07019168
ABSTRACT:
In a process for partially oxidizing propene to acrylic acid in the gas phase under heterogeneous catalysis, a starting reaction gas mixture comprising propene and oxygen and having a specific composition is oxidized in a first reaction stage over a first fixed catalyst bed having a volume-specific activity which is constant or increases in the flow direction and the acrolein-containing product gas mixture of the first reaction stage is subsequently oxidized in a second reaction stage over a second fixed catalyst bed having a volume-specific activity increasing in the flow direction, and the shaped catalyst bodies of both fixed catalyst beds are annular and each have a specific multimetal oxide composition.
REFERENCES:
patent: 4366093 (1982-12-01), Shiozaki et al.
patent: 6740779 (2004-05-01), Tenten et al.
patent: 31 13 179 (1982-01-01), None
patent: 199 48 523 (2001-04-01), None
patent: 102 32 482 (2004-01-01), None
patent: 0 257 565 (1987-08-01), None
patent: 0 253 409 (1988-01-01), None
patent: 0 293 224 (1988-11-01), None
patent: 0 990 636 (2000-04-01), None
patent: 199 55 176 (2001-01-01), None
patent: 1 106 598 (2001-06-01), None
patent: WO 00/53557 (2000-09-01), None
patent: WO 01/36364 (2001-05-01), None
Dieterle Martin
Martan Hans
Müller-Engel Klaus Joachim
Petzoldt Jochen
BASF - Aktiengesellschaft
Oblon, Spivak, McClelland, Maier & Neustadt. P.C.
Zucker Paul A.
LandOfFree
Heterogeneously catalyzed partial gas phase oxidation of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heterogeneously catalyzed partial gas phase oxidation of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heterogeneously catalyzed partial gas phase oxidation of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3566770