Organic compounds -- part of the class 532-570 series – Organic compounds – Nitriles
Reexamination Certificate
2003-06-03
2009-08-18
Wilson, James O (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitriles
Reexamination Certificate
active
07576233
ABSTRACT:
The present invention relates to a method for preparing halogenated benzonitriles by vapor phase ammoxidation at a reaction temperature in the range of 300 to 500° C. in a fixed bed reactor using a three-component catalyst. More particularly, the method of the invention relates to a method for preparing 2,6-dichlorobenzonitrile (2,6-DCBN) from 2,6-dichlorotoluene (2,6-DCT) by vapor phase ammoxidation. The invention also relates to a three-component catalyst provided on a carrier and its use in a vapor phase ammoxidation reaction according to the invention. In addition, the invention provides a method for preparing the three-component catalyst.
REFERENCES:
patent: 4147661 (1979-04-01), Higgins et al.
patent: 6710011 (2004-03-01), Mamedov et al.
patent: 0 141 228 (1985-05-01), None
patent: 03 044362 (1991-02-01), None
Huang et al., Ammoxidation of 2, 6-dichlorotoluene On Silica Supported Vanadium-Phosphorus Oxide Catalyst, Chinese Journal Of Catalysis, vol. 20 No. 6, Nov. 1999.
Qiong, et al. “A Direct Synthesis of Aromatic Nitriles from Methylaromatic Compounds by Ammoxidation on DC-108 Catalyst,”Synthetic Communications, vol. 29, No. 13, pp. 2349-2353, 1999.
Qiong, et al. “Catalysts for Preparing 2,6-Dichlorobenzonitrile by Ammonia Oxidation Process,” Chemical Abstracts, vol. 132, No. 6, Feb. 7, 2000, Abstract No. 65726e.
Diao, et al. “Synthesis of 2,6-Dichlorobenzonitrile by Catalytic Ammoxidation,”Hebei Keji Daxue Zuebao Bianjibu, vol. 21, No. 2, pp. 4-8, 2000, Abstract.
International Search Report completed Nov. 13, 2003 and issued to a related foreign application.
Belmans Marc
Boers Frank
Kalevaru Venkata Narayana
Lücke Bernhard
Martin Andreas
Knobbe Martens Olson & Bear LLP
Sackey Ebenezer
Tessenderlo Chemie S.A.
Wilson James O
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