Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2007-09-14
2011-10-25
Katakam, Sudhakar (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
Reexamination Certificate
active
08044244
ABSTRACT:
A process for preparing aromatic amines by catalytic hydrogenation of the corresponding nitro compound in a fluidized-bed reactor, in which a gaseous reaction mixture comprising the nitro compound and hydrogen flows from the bottom upward through a heterogeneous particulate catalyst forming a fluidized bed, wherein the fluidized bed is provided with internals which divide the fluidized bed into a plurality of cells arranged horizontally in the fluidized-bed reactor and a plurality of cells arranged vertically in the fluidized-bed reactor, with the cells having cell walls which are permeable to gas and have openings which ensure an exchange number of the heterogeneous, particulate catalyst in the vertical direction in the range from 1 to 100 liters/hour per liter of reactor volume, is proposed.
REFERENCES:
patent: 3136818 (1964-06-01), Sperber et al.
patent: 3429654 (1969-02-01), Wilhelm et al.
patent: 3482946 (1969-12-01), Shirk
patent: 4265834 (1981-05-01), Birkenstock et al.
patent: 4430302 (1984-02-01), Krause
patent: 5073236 (1991-12-01), Gelbein et al.
patent: 5112593 (1992-05-01), Itoh et al.
patent: 7098366 (2006-08-01), Sigl et al.
patent: 7434794 (2008-10-01), Kehrer et al.
patent: 7476297 (2009-01-01), Kaibel et al.
patent: 2003/0106837 (2003-06-01), Kaibel et al.
patent: 2005/0249648 (2005-11-01), Kehrer et al.
patent: 2007/0183963 (2007-08-01), Seidemann et al.
patent: 2007/0202035 (2007-08-01), Walsdorff et al.
patent: 1114820 (1961-10-01), None
patent: 1 133 394 (1962-07-01), None
patent: 28 49 002 (1980-05-01), None
patent: 102 26 120 (2003-12-01), None
patent: 10 2004 014 677 (2005-10-01), None
patent: 0 331 465 (1989-09-01), None
patent: 0 428 265 (1991-05-01), None
patent: 1 477 224 (2004-11-01), None
patent: 2005 077520 (2005-08-01), None
Diao, Shigang et al., “Gaseous catalytic hydrogenation of nitrobenzene to aniline in a two-stage fluidized bed reactor”, Applied Catalysis A: General, Elsevier, vol. 286, pp. 30-35, (2005).
Koenigsmann Lucia
Liekens Celine
Schneider Christian
Schwab Ekkehard
Seidemann Lothar
BASF SE
Katakam Sudhakar
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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