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Fluidized bed catalyst for preparing acrylonitrile by ammonia oxidation of propene

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

Inactive Publication Date: 2004-06-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is to overcome the problem 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 the production of acrylonitrile by ammoxidation of propylene

Method used

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  • Fluidized bed catalyst for preparing acrylonitrile by ammonia oxidation of propene
  • Fluidized bed catalyst for preparing acrylonitrile by ammonia oxidation of propene
  • Fluidized bed catalyst for preparing acrylonitrile by ammonia oxidation of propene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 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); 402.2 grams of ammonium molybdate was dissolved in 350 grams of hot water at 60 to 90°C, and 1.26 grams of niobium pentoxide was added to obtain material (C); 65.0 grams of bismuth nitrate, 15.25 grams of manganese nitrate, 290.5 grams of nickel nitrate, 46.8 grams of nitric acid Cerium, 98.5 grams of magnesium nitrate and 175.25 grams of ferric nitrate were mixed, 250 grams of water was added, heated and dissolved as material (D); 4.35 grams of phosphoric acid solution was weighed as material (E).

[0051] 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 sl...

Embodiment 2～5 and comparative example 1～4

[0053] 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.

[0054] The reaction conditions of above-mentioned embodiment and comparative example are:

[0055] φ38mm fluidized bed reactor

[0056] Reaction temperature 425°C

[0057] Reaction pressure 0.14MPa

[0058] Catalyst loading 400 grams

[0059] Catalyst propylene loading (WWH) 0.11 hours -1

[0060] Raw material ratio (mole) C 3 ＝ / NH 3 / air=1 / 1.2 / 9.5

[0061] Example

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Abstract

The prsent invention relates to a fluidized bed catalyst for producing acrylonitrile by utilizing propylene ammine oxidation. Said invention is mainly aimed at resolving the problem of that in the previous techniques the catalyst is not related to higher reaction pressure and operation load, and said invention utilizes the technical scheme which adopts the carrier containing silicon dioxide and the composite whose chemical formula (by atomic ratio) is as follows: Mo12BiaFebNicNbdNaeXfYgOm, where X is at least one kind selected from Li, K Rb or Cs, Y is at least one kind selected from Co, Mg, Mn, Ca, Ce, La, B, P or Cr so as to resolve the said problem. Said invention can retain higher acrylonitrile yield.

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 ...

Claims

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Application Information

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IPC IPC(8): B01J23/84B01J23/883B01J23/889C07C253/26C07C255/08
CPCY02P20/52
Inventor 安炜吴粮华陈欣
Owner CHINA PETROLEUM & CHEM CORP