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Fluidized bed catalyst for preparing acrylonitrile by propene ammoxidation

A technology of acrylonitrile fluidized bed and catalyst, which is applied in the direction of hydrocarbon ammoxidation preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., and can solve the problem that the catalyst does not involve high reaction pressure and operation Load and other issues

Inactive Publication Date: 2004-06-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the problems that the catalysts in the above-mentioned documents do not involve higher reaction pressure and operating load, and provide a new fluidized bed catalyst for acrylonitrile ammoxidation of propylene

Method used

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  • Fluidized bed catalyst for preparing acrylonitrile by propene ammoxidation
  • Fluidized bed catalyst for preparing acrylonitrile by propene ammoxidation
  • Fluidized bed catalyst for preparing acrylonitrile by propene ammoxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Mix 2.05 grams of cesium nitrate, 3.88 grams of sodium nitrate and 1.75 grams of potassium nitrate, add 30 grams of water and dissolve after heating to obtain material (A); dissolve 12.5 grams of chromium trioxide in 15 grams of water to obtain material (B); 21.68 grams of ammonium tungstate and 402.2 grams of ammonium molybdate were dissolved in 350 grams of 60-90°C hot water to obtain material (C); 65.0 grams of bismuth nitrate, 11.4 grams of gallium nitrate, 15.25 grams of manganese nitrate, 290.5 grams of nickel nitrate, Mix 46.8 grams of cerium nitrate, 98.5 grams of magnesium nitrate and 175.25 grams of ferric nitrate, add 250 grams of water, heat and dissolve as material (D); weigh 4.35 grams of phosphoric acid solution as material (E).

[0052] Mix the material (A) with 1280 grams of silica sol with a weight concentration of 40%, and add the materials (C), (B), (D) and (E) in turn under stirring, and obtain a slurry after fully stirring. The prepared slurry was ...

Embodiment 2～5 and comparative example 1～4

[0055] 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.

[0056] The reaction conditions of above-mentioned embodiment and comparative example are:

[0057] φ38mm fluidized bed reactor

[0058] Reaction temperature 440°C

[0059] Reaction pressure 0.14MPa

[0060] Catalyst loading 400 grams

[0061] Catalyst propylene loading (WWH) 0.095 hours -1

[0062] Raw material ratio (mole) C 3 ＝ / NH 3 / air=1 / 1.2 / 9.8

[0063] Example

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Abstract

The fluidized-bed catalyst for preparing acrylonitrile by utilizing propylene ammonia oxidation contains SiO2 carrier and the following copmosite: Mo12BiaFebNicNadGaeWfAgBhCiOx, in which A is at least one selected from Li, K, Rb, Cs, In, Tl or Sm; B is at least one selected from Co, Mg, Pb, Mn, Sr, Ca, Sn or Zn; and C is at least one selected from La, Ce, B, P, or Cr. Said catalyst is specially suitable for use under the condition of high reaction pressure and high propylene load, and can ensure the high yield of acrylonitrile.

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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888C07C253/26C07C255/08
CPCY02P20/52
Inventor 吴粮华汪国军陈欣
Owner CHINA PETROLEUM & CHEM CORP