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Catalyst for preparing acrylonitrile by ammonia oxidizing method

A technology of acrylonitrile catalyst and ammoxidation method, which is applied in the direction of hydrocarbon ammoxidation preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., and can solve the problem of low reaction yield of acrylonitrile catalyst , to achieve the effect of improving yield, stability and good technical effect

Active Publication Date: 2008-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by this invention is that the reaction yield of prior art acrylonitrile catalyst is not high in industrial installations, and gradually decreases as time prolongs, and the by-product CO 2 , CO, HCN rise, and catalyst stability has become one of the focuses of the industry. To provide a new fluidized bed catalyst for the ammoxidation of propylene to acrylonitrile

Method used

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  • Catalyst for preparing acrylonitrile by ammonia oxidizing method
  • Catalyst for preparing acrylonitrile by ammonia oxidizing method
  • Catalyst for preparing acrylonitrile by ammonia oxidizing method

Examples

Experimental program
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Effect test

Embodiment 1～11

[0045] According to the same preparation process as the comparative example, the catalyst composition was prepared according to Table 1. The finished catalysts were inspected according to the above-mentioned inspection and evaluation conditions, and the initial activity results are shown in Table 2. The 250-hour stability test results of Comparative Example 1 and Example 9 are shown in Table 3.

[0046] Table 1 Catalyst

[0047] Catalyst composition

Comparative example 1

Mo 12 Bi 2.0 Fe 2.5 Ni 4.5 Mg 1.8 La 0.8 SM 0.2 K 0.05 Cs 0.05 Na 0.05 +50% SiO2 2

Example 1

Mo 12 Bi 1.2 Fe 2.5 Ni 4.5 co 2.0 Ce 0.8 SM 0.2 Ti 0.04 K 0.03 Na 0.05 +50% SiO2 2 +10%Al 2 o 3

Example 2

Mo 12 Bi 0.5 Fe 1.8 Ni 6.0 Mg 2.5 La 0.8 Nb 0.1 K 0.1 Cs 0.05 Na 0.04 +30% SiO2 2 +20%Al 2 o 3

Example 3

Mo 12 Bi 0.2 Fe 2.0 Ni 6.8 Mg 0.8 SM 0.6 Zr 0.15 Cs 0.05 Sb 0.2 ...

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Abstract

The present invention relates to a fluidized bed catalyst for producing acrylonitrile by using ammonia oxidation process. It is characterized by that said catalyst uses silicone dioxide or aluminum oxide or their mixture as carrier, and contains the following active components: Mo, Bi, Fe, Ni, X, Y, Z and Q, in which X is at least one kind selected from Mg, Co, Ca, Be, Cu, Zn, Pb, Mn or Te, Y is at least one kind selected from La, Ce or Sm, Z is at least one kidn selected from K, Rb, Na, Li o Cs and Q is at least one kidn selected from Ti, Zr, Nb or Sb. Said catalyst can be used in industrial production of acrylonitrile by using propene ammonia oxidation process.

Description

technical field [0001] The invention relates to a fluidized bed catalyst for preparing acrylonitrile by ammoxidation. Background technique [0002] The ammoxidation of olefins to prepare α and β unsaturated nitriles was developed by BP in the 1960s. The core technology of this process is to use a catalyst whose active components contain Mo and Bi. After continuous improvement, the Mo-Bi series catalyst is very mature at present, and the process of preparing acrylonitrile by ammoxidation of propylene has been widely used in industry. In the past, the improvement of the catalyst was mainly carried out from the aspects of the activity and stability of the catalyst, such as adding transition metals to the active component to improve the activity and increase the yield of the product; adding rare earth elements to improve the redox ability; adding elements such as Na and P To improve the wear resistance of the catalyst; add Fe, Co, N1 and other elements to inhibit the sublimatio...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J23/883B01J23/881C07C253/26C07C255/08
CPCY02P20/52
Inventor 姜家乐杨斌宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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