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Regeneration method of ammoxidation fluid catalyst

A fluidized bed catalyst, ammonia oxidation technology, applied in catalyst regeneration/reactivation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc.

Active Publication Date: 2012-09-05
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006]Technical problems to be solved by the present invention The Mo, Bi, Fe oxide system catalysts in the prior art exist in industrial devices, the sublimation of Mo element and the loss of K element cause the catalyst The problem of activity decline, providing a new regeneration method for ammoxidation fluidized bed catalyst

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  • Regeneration method of ammoxidation fluid catalyst
  • Regeneration method of ammoxidation fluid catalyst

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Embodiment Construction

[0031] According to fresh bulk acrylonitrile fluidized bed catalyst (Mo 12 Bi 2.0 Fe 2.5 Ni 5.5 Mg 1.8 La 0.8 K 0.05 Cs 0.05 Na 0.05 +50% SiO2 2 ) composition requirements, will balance the catalyst (Mo 11.3 Bi 2.0 Fe 2.5 Ni 5.5 Mg 1.8 La 0.8 K 0.041 Cs 0.05 Na 0.05 +50% SiO2 2 ) replenish molybdenum and potassium components of corresponding content, mix uniformly, and the catalyst is roasted and regenerated according to the process conditions in Table 1 and 2. The results show that: the single recovery of acrylonitrile of the catalyst can reach more than 82%, which is more than 6 percentage points higher than that of the equilibrium catalyst before regeneration.

[0032] Table 1 Regeneration effect of different molybdenum sources

[0033] components Acrylonitrile single charge (%) Propylene conversion (%) Acrylonitrile selectivity (%) Balancer 77.0 94.7 81.4 Molybdenum supplementation 79.2 95.6 82.8 Ammonium ...

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Abstract

The invention relates to a regeneration method of an ammoxidation fluid catalyst, which mainly solves the problem that sublimation of the Mo element and loss of the K element result in the decrease of catalyst activity in the use process of the current Mo, Bi and Fe oxide system catalysts in an industrial device. The invention adopts the technical scheme of supplementing the corresponding contents of molybdenum and kalium according to the composition requirement of a fresh body catalyst of the ammoxidation fluid equilibrium catalyst, and calcining and activating at the temperature of 550-700 DEG C for 0.5-12 hours to obtain the regenerated catalyst. The technical scheme better solves the problem and can be used for the industrial production of an acrylonitrile or methacrylonitrile device by ammoxidation.

Description

technical field [0001] The present invention relates to a kind of regeneration method of ammoxidation fluidized bed catalyst, especially about the fluidized bed catalyst with Mo, Bi, Fe oxides as the main active components, which is used for the ammoxidation of propylene and isobutene to produce acrylonitrile and methacrylonitrile Regeneration method of bed catalyst. Background technique [0002] At present, the industrial production of acrylonitrile is realized through the propylene ammoxidation reaction process, which was invented by BP in the 1960s. The process uses a multi-component composite oxide catalyst whose main components are Mo, Bi, and Fe oxides. Catalyst technology is one of the core technologies of this process. After years of continuous improvement, the performance of the catalyst has been greatly improved. At present, the single yield of acrylonitrile with fresh catalyst can reach more than 80%. After a long period of use in an industrial device, the catal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/02B01J23/887B01J23/94C07C255/08C07C253/26
CPCY02P20/52Y02P20/584
Inventor 姜家乐吴粮华张顺海
Owner CHINA PETROLEUM & CHEM CORP
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