Fluidized bed catalyst for prodn. of 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 and other problems to achieve the effect of accelerating diffusion and improving conversion rate

Active Publication Date: 2006-03-29
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 docum

Method used

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  • Fluidized bed catalyst for prodn. of acrylonitrile
  • Fluidized bed catalyst for prodn. of acrylonitrile
  • Fluidized bed catalyst for prodn. of acrylonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Mix 1.80 grams of cesium nitrate, 3.19 grams of sodium nitrate and 2.25 grams of potassium nitrate, add 30 grams of water and dissolve after heating to obtain material (A); dissolve 9.36 grams of chromium trioxide in 15 grams of water to obtain material (B); 392.4 gram of ammonium molybdate is dissolved in 350 gram of 60~90 ℃ of hot water, obtain material (C); 67.4 gram of bismuth nitrate, 9.39 gram of silver nitrate, 0.96 gram of germanium oxide, 408.1 gram of nickel nitrate and 302.4 gram of ferric nitrate are mixed, Add 250 grams of water, heat and dissolve as material (D); weigh 4.35 grams of phosphoric acid solution as material (E).

[0047] 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 formed into microspheres in a spray dryer, and finally roasted at 600°C for 2.0 hours in a rotary roaster wi...

Embodiment 2～6 and comparative example 1～4

[0050] 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.

[0051] The reaction conditions of above-mentioned embodiment and comparative example are:

[0052] φ38mm fluidized bed reactor

[0053] Reaction temperature 430°C

[0054] Reaction pressure 0.14MPa

[0055] Catalyst loading 400 grams

[0056] Catalyst propylene loading (WWH) 0.11 hours -1

[0057] Raw material ratio (mole) C 3 ＝ / NH 3 / air=1 / 1.2 / 9.5

[0058] Example

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Abstract

A fluidized-bed catalyst for preparing acrylonitrile by ammoxidizing propene is composed of SiO2 as carrier and the composition AaBbCcNidFeeBifM012Ox, where A is chosen from Li, Na, K, Rb and Cs, B is chosen from W, P, B, Ga, Cr, Sb, Al, Ge, Nb and V, and C is chosen from Ag, Cu and their mixture. Its advantages are high power to bear high reaction pressure and propene load, and high conversion rate and output rate.

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 ...

Claims

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Application Information

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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
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