Organic compounds -- part of the class 532-570 series – Organic compounds – Nitriles
Reexamination Certificate
2008-05-13
2008-05-13
Wilson, James O. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitriles
C558S327000
Reexamination Certificate
active
10940652
ABSTRACT:
A reactor for producing a nitrile compound from a carbon ring or heterocyclic compound having organic substituents by a gas phase reaction using a fluidized catalyst bed with ammonia and a gas containing oxygen. In a cylindrical fluidized catalyst bed having a diameter of 2.0 meters or greater, partial vaporization-type cooling tubes (the cooling medium is partially vaporized in the tubes) and complete vaporization-type cooling tubes (the cooling medium is completely vaporized in the cooling tubes) are disposed in a specific arrangement. Water containing ionic SiO2in 0.1 ppm or smaller and having an electric conductivity of 5 μS/cm or smaller is used as the cooling medium for the complete vaporization-type cooling tubes. The temperature of the reaction is easily stabilized and uniform distribution of temperature is obtained in the fluidized catalyst bed. Stable continuous operation is achieved for a long time in a commercial scale apparatus.
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Communication and European Search Report dated Aug. 11, 2004, for No. EP 02 02 8774.
Kosuge Fumisada
Nakamura Ken'ichi
Shitara Takuji
Ueno Shuichi
Antonelli, Terry Stout & Kraus, LLP.
Mitsubishi Gas Chemical Company Inc.
Sackey Ebenezer
Wilson James O.
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