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Method for prepn. of fluidized catalyst for prodn. of acrylonitrile

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

Inactive Publication Date: 2004-06-02
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 to overcome the problems 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 preparing acrylonitrile

Method used

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  • Method for prepn. of fluidized catalyst for prodn. of acrylonitrile
  • Method for prepn. of fluidized catalyst for prodn. of acrylonitrile
  • Method for prepn. of fluidized catalyst for prodn. of acrylonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 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 60-90°C to obtain material (C); 65.0 grams of bismuth nitrate, 9.66 grams of germanium oxide, 290.5 grams of nickel nitrate, 46.8 grams of cerium nitrate, 78.8 grams of magnesium nitrate and 175.25 Mix gram of ferric nitrate, add 250 grams of water, and heat to dissolve it as material (D); weigh 4.35 grams of phosphoric acid solution as material (E).

[0050] Mix the material (A) with 1,280 grams of silica sol with a weight concentration of 40%, add the materials (C), (B), (D) and (E) in sequence under stirring, and obtain a slurry after fully stirring. Method the prepared slurry is formed into microspheres in a spray dryer, and finally calcine...

Embodiment 2～6 and comparative example 1～4

[0053] The catalysts with different compositions in the following table were prepared by basically the same method as in Example 1, and the prepared catalyst was used to perform the reaction of propylene ammoxidation to acrylonitrile under the following reaction conditions. The results are shown in Table 1.

[0054] The reaction conditions of the above examples and comparative examples are:

[0055] φ38 mm fluidized bed reactor

[0056] Reaction temperature 430℃

[0057] Reaction pressure 0.14MPa

[0058] Catalyst loading amount 400g

[0059] Catalyst propylene load (WWH) 0.085 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 fluidized-bed catalyst for preparing acrylonitrile by propylene ammoxidation process contains silicon dioxide carrier and the following compound: Mo12BiaFebNicNadMgeGefAgBhOx; where A is at least one kind of selected from Li, K, Rb, Cs, Sm or Tl; B is at least one kind selected from Co, Mn, Zn, Cu, Ce, B, P or Cr. Said catalyst is specially applicable to use under the condition of lower reaction temp., lower air / propylene ratio, higher reaction pressure and high propylene load, and can possess high yield of acrylonitrile.

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. It is produced by ammoxidation of propylene. In order to obtain a fluidized bed catalyst with high activity and high selectivity, a series of improvements have been made through continuous exploration. These improvements mostly involve the active composition of the catalyst, and focus on the combination of active components of the catalyst to improve the activity and selectivity of the catalyst, so as to achieve an increase in the single-pass yield of acrylonitrile and an increase in the production load. [0003] After more than 40 years of development in the production of acrylonitrile by ammoxidation method, the production capacity of the factory has been close to balance with market demand. At present, the main development trend of acryl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/88C07C253/26C07C255/08
CPCY02P20/52
Inventor 安炜吴粮华陈欣戴毅敏
Owner CHINA PETROLEUM & CHEM CORP