Fluidized bed reaction device and reaction method for producing aromatic nitrile by ammoxidation of aromatic hydrocarbons
A fluidized-bed reaction and fluidized-bed reactor technology is applied in the field of fluidized-bed reaction devices for the production of aromatic nitrile by ammoxidation of aromatic hydrocarbons, and can solve the problems of large ammonia ratio, underutilized raw materials, large air ratio, etc.
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Embodiment 1
[0024] After toluene and ammonia are vaporized, they enter into the dense phase zone and contact with the catalyst through the aromatic hydrocarbon / ammonia distributor and air distribution plate arranged in the lower dense phase zone respectively to generate product gas rich in aromatic nitrile. The aromatic nitrile-containing product gas contains unreacted ammonia and air; the aromatic nitrile-rich product gas, entrained with the catalyst, passes upward through the large-pore sieve plate into the second dense phase zone, and enters another dense phase zone from the aromatics distributor. Toluene is mixed and contacted with the catalyst to generate benzonitrile product; the benzonitrile product effluent from the second dense phase zone entrained catalyst leaves the fluidized bed reactor for subsequent gas-solid separation through the cyclone in the dilute phase zone. In the separation system, the recovered catalyst is returned to the second dense phase bed, and the catalyst mat...
Embodiment 2
[0027]After toluene and ammonia are vaporized, they enter into the dense phase zone and contact with the catalyst through the aromatic hydrocarbon / ammonia distributor and air distribution plate arranged in the lower dense phase zone respectively to generate product gas rich in aromatic nitrile. The aromatic nitrile-containing product gas contains unreacted ammonia and air; the aromatic nitrile-rich product gas, entrained with the catalyst, passes upward through the large-pore sieve plate into the second dense phase zone, and enters another dense phase zone from the aromatics distributor. Toluene is mixed and contacted with the catalyst to generate benzonitrile product; the benzonitrile product effluent from the second dense phase zone entrained catalyst leaves the fluidized bed reactor for subsequent gas-solid separation through the cyclone in the dilute phase zone. In the separation system, the recovered catalyst is returned to the second dense phase bed, and the catalyst mate...
Embodiment 3
[0030] After toluene and ammonia are vaporized, they enter into the dense phase zone and contact with the catalyst through the aromatic hydrocarbon / ammonia distributor and air distribution plate arranged in the lower dense phase zone respectively to generate product gas rich in aromatic nitrile. The aromatic nitrile-containing product gas contains unreacted ammonia and air; the aromatic nitrile-rich product gas, entrained with the catalyst, passes upward through the large-pore sieve plate into the second dense phase zone, and enters another dense phase zone from the aromatics distributor. Toluene is mixed and contacted with the catalyst to generate benzonitrile product; the benzonitrile product effluent from the second dense phase zone entrained catalyst leaves the fluidized bed reactor for subsequent gas-solid separation through the cyclone in the dilute phase zone. In the separation system, the recovered catalyst is returned to the second dense phase bed, and the catalyst mat...
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