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Fluidized bed catalyst for preparing acrylonitrile

A fluidized bed catalyst, acrylonitrile technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, preparation of carboxylic acid nitrile, etc., can solve the problems of acrylonitrile load and low reaction pressure , to achieve the effect of improving activity and stability

Active Publication Date: 2010-12-22
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 the low problem of acrylonitrile load and reaction pressure existing in the prior art, and a new fluidized bed catalyst for preparing acrylonitrile is provided, which can not only be suitable for higher propylene load And higher reaction pressure operation, and has the advantage of higher yield of acrylonitrile

Method used

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  • Fluidized bed catalyst for preparing acrylonitrile
  • Fluidized bed catalyst for preparing acrylonitrile
  • Fluidized bed catalyst for preparing acrylonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 10 grams of water to 3.58 grams of cesium nitrate and 2.50 grams of potassium hydroxide and dissolve after heating to obtain material (A); 783.0 grams of ammonium molybdate are dissolved in 650 grams of 60~90 ℃ hot water to obtain material (B); 322.7 grams Bismuth nitrate, 568.6 grams of magnesium nitrate, 325.8 grams of nickel nitrate, 55.54 grams of zinc nitrate, 528.0 grams of iron nitrate, 107.6 grams of lanthanum nitrate and 114.0 grams of cadmium nitrate were mixed, and 310 grams of water were added, heated and dissolved as material (C).

[0053] The material (A) is mixed with 2475 grams of silica sol with a weight concentration of 40%, and the materials (B) and (C) are added successively under stirring, and then 131.0 grams of 50% manganese nitrate solution is added, and the slurry is obtained after fully stirring. The slurry that will make is carried out microsphere molding in spray drier according to usual method, and finally inner diameter is 89 millimeters...

Embodiment 2～6 and comparative example 1～4

[0056] 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.

[0057] The reaction conditions of above-mentioned embodiment and comparative example are:

[0058] 38 mm fluidized bed reactor

[0059] Reaction temperature 440°C

[0060] Reaction pressure 0.14MPa

[0061] Catalyst loading 400 grams

[0062] Catalyst propylene loading (WWH) 0.11 hours -1

[0063] Raw material ratio (mole) C 3 ＝ / NH 3 / air=1 / 1.2 / 9.8

[0064]

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Abstract

The present invention relates to a fluidized bed catalyst for manufacturing acrylonitrile by propylene ammmoxidation which mainly solves the problems of low propylene load and lower reaction pressure in the prior art. The invention better solves the problem by adopting the technical proposal through a compound with a silicon dioxide as the carrier and in an atom ratiometer chemical formula as AaBbCcDdCdeNifMggFehBiiMo12Ox; in the formula, A is selected from at least one of Li, Na, K, Rb or Cs, B from at least one of La, Ce, Pr, Nd or Eu and C from at least one of Ca, Sr, B, Cd, Cr, W or Mn. The catalyst provided by the present invention is suitable for being used into the industrial manufaucutre under conditions of higher reaction pressure and high propylene load.

Description

technical field [0001] The invention relates 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 balance. At present, the main development trend of acrylonitrile productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887C07C255/08C07C253/18
CPCY02P20/52
Inventor 陶跃武吴粮华
Owner CHINA PETROLEUM & CHEM CORP