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Fluid bed catalyst for producing acrylonitrile

A fluidized bed catalyst, acrylonitrile technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, bulk chemical production, etc., can solve the problem that the catalyst does not involve higher reaction pressure and operation. load etc.

Active Publication Date: 2008-04-30
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 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

Method used

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  • Fluid bed catalyst for producing acrylonitrile
  • Fluid bed catalyst for producing acrylonitrile
  • Fluid bed catalyst for producing acrylonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1.80 grams of cesium nitrate, 3.19 grams of sodium nitrate and 2.25 grams of potassium nitrate are mixed, and 30 grams of water are added and dissolved after heating to obtain material (A); 9.36 grams of chromium trioxide are dissolved in 15 grams of water to obtain material (B); 392.4 grams of ammonium molybdate were dissolved in 350 grams of hot water at 60 to 90°C to obtain material (C); 18.0 grams of bismuth nitrate, 9.6 grams of germanium oxide, 27.2 grams of lanthanum nitrate, 408.1 grams of nickel nitrate, and 151.2 grams of ferric nitrate were mixed , add 250 grams of water, heat and dissolve as material (D); weigh 4.35 grams of phosphoric acid solution as material (E).

[0048] 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 is formed into microspheres in a spray dryer, and finally roasted at 60...

Embodiment 2～6 and comparative example 1～4

[0051] 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.

[0052] The reaction conditions of above-mentioned embodiment and comparative example are:

[0053] φ38mm fluidized bed reactor

[0054] Reaction temperature 430°C

[0055] Reaction pressure 0.14MPa

[0056] Catalyst loading 400 grams

[0057] Catalyst propylene loading (WWH) 0.011 hours -1

[0058] Raw material ratio (mole) C 3 ＝ / NH 3 / air=1 / 1.2 / 9.5

[0059] Table 1

[0060] Example

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Abstract

The fluid bed catalyst for preparing acrylonitrile through ammoxidizing propylene contains silica carrier and the composition AaBbCcLadFeeBifGegMo12Ox, where A is at least one of Li, Na, K, Rb and Cs; B is at least one of Ni, Co, Cd, Zn, Zr or Pb; and C is at least one of B, P, Sb, Cr and W. The catalyst is especially suitable for use in the conditions of slightly low reaction temperature, low air / propylene ratio, high reaction pressure and high propylene load, can result in greatly raised acrylonitrile yield, and may be used in industrial acrylonitrile production.

Description

technical field [0001] The invention relates to a fluidized bed catalyst for producing acrylonitrile, in particular 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 bala...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/88B01J23/887B01J27/192C07C253/26C07C255/08
CPCY02P20/52
Inventor 汪国军吴粮华陈欣
Owner CHINA PETROLEUM & CHEM CORP