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Fluidized bed catalyst for producing acrylonitrile by propylene ammoxidation

A fluidized bed catalyst, acrylonitrile technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrocarbon ammoxidation preparation, etc., can solve the problem of low yield of acrylonitrile, etc. The effect of promoting the conversion of propylene and reducing the by-products of deep oxidation

Active Publication Date: 2012-06-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that there are problems in the prior art that do not involve the operation of the catalyst at a higher reaction pressure and propylene load or the low yield of acrylonitrile, and provide a new method for the ammoxidation of propylene to produce acrylonitrile fluidized bed catalyst

Method used

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  • Fluidized bed catalyst for producing acrylonitrile by propylene ammoxidation
  • Fluidized bed catalyst for producing acrylonitrile by propylene ammoxidation
  • Fluidized bed catalyst for producing acrylonitrile by propylene ammoxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1.6 grams of sodium hydroxide and 4.1 grams of potassium hydroxide and 11 grams of water were added and dissolved after heating to obtain material (A); 850.0 grams of ammonium molybdate was dissolved in 800 grams of hot water at 60 to 90°C to obtain material (B); Mix 157.5 grams of bismuth nitrate, 153.7 grams of magnesium nitrate, 286.8 grams of manganese nitrate, 594.5 grams of nickel nitrate, and 330.4 grams of ferric nitrate, add 340 grams of water, heat and dissolve as material (C), weigh 26.6 grams of praseodymium nitrate, add 10 grams of water , to obtain material (D).

[0045] Mix material (A) with 2475 grams of silica sol with a weight concentration of 40%, add materials (B), (C) and (D) in turn under stirring, and obtain a slurry after thorough stirring, and prepare The slurry is carried out microsphere molding in the spray drier, and finally inner diameter is 89 millimeters, and length is 1700 millimeters ( 89 * 1700 mm) in a rotary roaster at 600 ° C for 2...

Embodiment 2～6 and comparative example 1～4

[0048] Catalysts with different compositions in the following table were prepared by the same method as in Example 1, and the ammoxidation of propylene to acrylonitrile was carried out with the prepared catalyst under the following reaction conditions. The results are shown in Table 1.

[0049] The reaction conditions of above-mentioned embodiment and comparative example are:

[0050] 38 mm fluidized bed reactor

[0051] Reaction temperature 440°C

[0052] Reaction pressure 0.14MPa

[0053] Catalyst loading 400 grams

[0054] Catalyst propylene loading (WWH) 0.085 hours -1

[0055] Raw material ratio (mole) C 3 ＝ / NH 3 / air=1 / 1.2 / 9.8

[0056] Table 1

[0057] Example

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Abstract

The invention relates to a fluidized bed catalyst for producing acrylonitrile by propylene ammoxidation, which mainly solves the problem that the catalyst is not operated under higher reaction pressure and higher propylene load or yield of acrylonitrile is low in the prior art. Through adopting the technical scheme that the catalyst con contains silicon dioxide, aluminum oxide, or mixture carrierthereof and composition contaning the following chemical formula indicated by atomic proportion: AaBbPrcBidMgeMo120x, wherein A is at least one selected from Li, Na, K, Rb and Cs, and B is at least one selected from Ca, Mn, Fe, Co, Ni and Ba, the invention better solves the problem and can be applied to the industrial production of acrylonitrile under the condition of high propylene load.

Description

technical field [0001] The invention relates to a fluidized bed catalyst for producing acrylonitrile by ammoxidation of propylene. Background technique [0002] Acrylonitrile is an important organic chemical raw material, which is produced by ammoxidation of propylene. In order to obtain a fluidized bed catalyst with high activity and high selectivity, people have made a series of improvements through continuous exploration. Most of these improvements involve the active composition of the catalyst, focusing on the combination of the active components of the catalyst to improve the activity and selectivity of the catalyst, thereby achieving an increase in the single-pass yield of acrylonitrile and an increase in production load. [0003] After more than 40 years of development in the production of acrylonitrile by ammoxidation, the production capacity of the factory and the market demand are close to balance. At present, the main development trend of acrylonitrile productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J23/883B01J23/887C07C255/08C07C253/24
CPCY02P20/52
Inventor 吴粮华汪国军
Owner CHINA PETROLEUM & CHEM CORP