Fluid bed catalyst for acrylonitrile production

A fluidized bed catalyst and acrylonitrile technology, which is applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, bulk chemical production, etc. It can solve the problems of low propylene load and low reaction pressure , to achieve the effect of improving activity and stability

Active Publication Date: 2008-11-19
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 that the propylene loading in the prior art is lower and the reaction pressure is lower, and a new method for producing acrylonit

Method used

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  • Fluid bed catalyst for acrylonitrile production
  • Fluid bed catalyst for acrylonitrile production
  • Fluid bed catalyst for acrylonitrile production

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] [Example 1]

[0052] 1.40 g of sodium hydroxide and 2.35 g of potassium hydroxide were added to 10 g of water and heated to dissolve to obtain material (A); 734.6 g of ammonium molybdate was dissolved in 600 g of hot water at 60-90°C to obtain material (B); 1g of bismuth nitrate, 594.4g of iron nitrate, 611.2g of nickel nitrate, 177.8g of magnesium nitrate, 40.9g of calcium nitrate and 118.8g of telluric acid were mixed, and 450g of water was added and heated to dissolve as material (C); weigh 70.1g of chromium trioxide Dissolve in 75 g of water to obtain material (D); weigh 22.6 g of cerium nitrate, dissolve in 10 g of water and heat to dissolve to obtain material (E), weigh 430.0 g of 50% manganese nitrate as material (F).

[0053] Mix material (A) with 2475 grams of silica sol with a weight concentration of 40%, add materials (B), (C), (D), (E) and (F) in sequence under stirring, and obtain slurry after fully stirring The slurry is formed into microspheres in a spray dry...

Example

[0055] [Examples 2 to 6 and Comparative Examples 1 to 4]

[0056] 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 carry out the reaction of ammoxidation of propylene to acrylonitrile under the following reaction conditions. The results are shown.

[0057] The reaction conditions of the above examples and comparative examples are:

[0058] 38 mm fluidized bed reactor

[0059] Reaction temperature 440℃

[0060] Reaction pressure 0.14MPa

[0061] Catalyst loading amount 400 g

[0062] Catalyst propylene load (WWH) 0.11 hour -1

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

[0064]

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Abstract

The invention relates to a fluidized bed catalyst which is used for producing acrylonitrile through propene ammoxidation, and mainly solves the problems of lower propene loading and lower reaction pressure in the prior art. The invention adopts a mixture which takes silicon dioxide as a carrier and has the chemical formula calculated in atomic ratio as follows: AaBbCcDdTeeNifMggFehBijMo12Ox, wherein, A is at least one of Li, Na, K, Rb and Cs; B is at least one of La, Ce, Nd and Eu; C is at least one of Cr, W and Mn; and D is at least one of Cu, Zn, Ag, Cd, Ca and S r or at least one in the B; thereby the technical proposal can better solve the problems. The catalyst can be applied to the industrial production of the acrylonitrile under higher reaction pressure and higher propene loading condition.

Description

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

Claims

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Application Information

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IPC IPC(8): B01J23/887C07C255/08C07C253/26
CPCY02P20/52
Inventor 陶跃武吴粮华
Owner CHINA PETROLEUM & CHEM CORP
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