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Fluid catalyst for preparing acrylonitrile by ammonia oxidation process

A technology of fluidized bed catalyst and ammoxidation method, which is applied in the direction of hydrocarbon ammoxidation preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., which can solve the problem of high reaction by-products and insufficient selectivity Good and other problems, to achieve the effect of high selectivity, high single yield, and inhibition of deep oxidation

Active Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that there are high reaction by-products of acrylonitrile catalysts in the prior art and the problem that the selectivity is not good enough, and a new fluidized bed catalyst for acrylonitrile production by propylene ammoxidation is provided

Method used

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  • Fluid catalyst for preparing acrylonitrile by ammonia oxidation process
  • Fluid catalyst for preparing acrylonitrile by ammonia oxidation process
  • Fluid catalyst for preparing acrylonitrile by ammonia oxidation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0046] According to the same catalyst composition of Comparative Example 1, the preparation conditions were used in Table 1. The finished catalyst was inspected according to the above inspection and evaluation conditions, and the initial activity results are shown in Table 2.

[0047] Table 1 Catalyst preparation conditions

[0048] Roasting temperature / ℃

Air / nitrogen / steam ratio / vol%

Micropore / total pore volume / vol%

Comparative example 1

580

100 / 0 / 0

42.3

Example 1

580

90 / 10 / 0

45.6

Example 2

600

90 / 0 / 10

44.8

Example 3

690

70 / 20 / 10

51.2

Example 4

550

50 / 50 / 0

50.5

Example 5

745

40 / 30 / 30

62.9

Example 6

630

40 / 20 / 40

60.7

Example 7

640

30 / 65 / 5

68.4

Example 8

720

20 / 20 / 60

71.0

Example 9

565

10 / 50 / 40

63.3

Example 10

590

60 / 18 / 22

68.1

[0049] Table 2 Investigation results of initial activity

[0050] Acrylonitrile single receipt (%)

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Abstract

The invention relates to a fluid catalyst for preparing acrylonitrile by an ammonia oxidation process, which mainly solves the problems of high by-product yield and poor selectivity of catalyst propylene ammoxidation in the prior art. In the invention, the problems of high by-product yield and poor selectivity are solved by adopting the technical scheme that the catalyst is formed by taking SiO2 and Al2O3 or a mixture of SiO2 and Al2O3 as a carrier, and the contained active component is represented by the following general formula: Mo12BiaFebNicXdYeZfQgOx, wherein X is selected from at least one of Mg, Co, Ca, Be, Cu, Zn, Pb, Mn or Te; Y is selected from at least one of La, Ce or Sm; Z is selected from at least one of K, Rb, Na, Li or Cs; and Q is selected from at least one of Al, Ti, Zr,Nb or Sb. The fluid catalyst can be used in industrial production of producing acrylonitrile by propylene ammmoxidation.

Description

Technical field [0001] The invention relates to a fluidized bed catalyst for preparing acrylonitrile by ammoxidation method. Background technique [0002] The process for preparing α and β unsaturated nitriles by ammoxidation of olefins was developed by BP in the 1960s. The core technology of the process is to use a catalyst with active components containing Mo and Bi. After continuous improvement, the current Mo-Bi series catalyst is very mature, 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 in terms of the activity and stability of the catalyst, such as adding transition metals to the active components to increase the activity and increase the unit yield of the target product acrylonitrile; adding rare earth elements to improve the redox capacity; adding Na, P and other elements to improve the wear resistance of the catalyst; Fe, Co, Ni and other elem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883B01J23/887C07C255/08C07C253/24
CPCY02P20/52
Inventor 姜家乐杨斌宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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