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Fluid bed catalyzer for producing vinyl cyanide

A fluidized bed catalyst, acrylonitrile technology, applied in physical/chemical process catalysts, catalyst supports, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low reaction pressure and low acrylonitrile load, Achieve the effect of accelerating diffusion, improving activity and stability

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is the problem of low acrylonitrile load and low reaction pressure existing in the prior art, and a new fluidized bed catalyst for preparing acrylonitrile is provided

Method used

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  • Fluid bed catalyzer for producing vinyl cyanide
  • Fluid bed catalyzer for producing vinyl cyanide
  • Fluid bed catalyzer for producing vinyl cyanide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 4.31 grams of rubidium nitrate and 12.72 grams of potassium hydroxide were dissolved in 22 grams of water and heated to obtain the material (A); 60.79 grams of ammonium tungstate and 795.6 grams of ammonium molybdate were dissolved in 700 grams of hot water at 60 to 90 ° C to obtain the material (B); 182.2 gram bismuth nitrate, 144.4 gram magnesium nitrate, 772.3 gram nickel nitrate, 44.3 gram calcium nitrate, 613.1 gram iron nitrate and 65.6 gram lanthanum nitrate are mixed, add water 370 grams, after heating and dissolving, as material (C), weigh Dissolve 30.4 g of chromium trioxide in 40 g of water to obtain material (D), weigh 32.6 g of cerium nitrate and dissolve in 25 g of water and heat to dissolve to obtain material (E).

[0054] 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 formed into microspheres in...

Embodiment 2～6 and comparative example 1～4

[0057] Catalysts with different active 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.

[0058] The reaction conditions of above-mentioned embodiment and comparative example are:

[0059] φ38mm fluidized bed reactor

[0060] Reaction temperature 440°C

[0061] Reaction pressure 0.14MPa

[0062] Catalyst loading 400 grams

[0063] Catalyst propylene loading (WWH) 0.11 hours -1

[0064] Raw material ratio (mole) C 3 ＝ / NH 3 / air=1 / 1.2 / 9.8

[0065]

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PUM

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Abstract

The invention relates to fluidized bed catalyst used for the preparation of acrylonitrile, which mainly solves the problems of acrylonitrile loading and low reaction pressure existing in the prior art. The invention takes silica as a carrier and calculates the composition with the following chemical formula according to the atomic ratio: AaBbCcDdKeNifMggFehBiiMo12Ox, wherein, the A is selected from at least one of Li, Na, Rb, Cs or Ti; the B is selected from at least one of La, Ce, Pr, Nd or Eu; the C is selected from at least one of Cr or W; and the D is selected from at least one of Cu, Zn, Ca, Sr or B. The invention can be used in the industrial production under the condition of high reaction pressure and high acrylonitrile loading.

Description

technical field [0001] The invention relates to a fluidized bed catalyst for preparing acrylonitrile, in particular to a fluidized bed catalyst for preparing 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 Applications(China)
IPC IPC(8): B01J23/881B01J23/888B01J23/887B01J32/00C07C255/08C07C253/26
CPCY02P20/52
Inventor 陶跃武奚美珍戴毅敏吴粮华
Owner CHINA PETROLEUM & CHEM CORP