High-stability fluid catalyst for producing acrylonitrile

A fluidized bed catalyst, high stability technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, bulk chemical production, etc., which can solve low reaction pressure, low operating load conditions and other problems, to achieve the effect of promoting the conversion of propylene, improving the technical effect, and reducing the by-products of deep oxidation

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the patent, the catalyst can effectively prevent the yield of acrylonitrile from decreasing when the reaction time is extended, but the evaluation of the catalyst is carried out under the conditions of relatively low reaction pressure and low operating load

Method used

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  • High-stability fluid catalyst for producing acrylonitrile
  • High-stability fluid catalyst for producing acrylonitrile
  • High-stability fluid catalyst for producing acrylonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1.6 grams of sodium hydroxide and 4.1 grams of potassium hydroxide and 11 grams of water were added and dissolved after heating to obtain material (A); 850.0 grams of ammonium molybdate was dissolved in 800 grams of hot water at 60 to 90°C to obtain material (B); Mix 157.5 grams of bismuth nitrate, 286.8 grams of manganese nitrate, 418.6 grams of barium nitrate, 594.5 grams of nickel nitrate, 330.4 grams of iron nitrate, add 340 grams of water, heat and dissolve as material (C), weigh 26.6 grams of praseodymium nitrate and 23.9 grams of oxide Germanium, add 15 grams of water, obtain material (D).

[0047] 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 carried out microsphere molding in the spray drier, and finally inner diameter is 89 millimeters, and length is 1700 millimeters ( 89 * 1700 mm) in a rotary roa...

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] mm fluidized bed reactor

[0053] Reaction temperature 440°C

[0054] Reaction pressure 0.14MPa

[0055] Catalyst loading 400 grams

[0056] Catalyst propylene loading (WWH) 0.085 hours -1

[0057] Raw material ratio (mole) C 3 ＝ / NH 3 / air=1 / 1.2 / 9.8

[0058] The reaction results were calculated at 4 hours, 400 hours, 800 hours and 1200 hours after the start of the reaction.

[0059] Table 1

[0060]

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PUM

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Abstract

The invention relates to a high-stability fluid catalyst for producing acrylonitrile by propylene ammoxidation, which mainly solves the problem of poor stability of catalysts in the prior art. The high-stability fluid catalyst adopts silicon dioxide, aluminum oxide or a mixture thereof as a carrier and comprises a composition with the following chemical formula in atomic ratio: AaBbGecBafPrdBieMo12Ox, wherein A is at least one of Li, Na, K, Rb or Cs; and B is at least one of Ca, Mn, Fe, Co or Ni. The technical scheme solves the problem better, and can be used for industrial production of the acrylonitrile under the high propylene loading condition.

Description

technical field [0001] The invention relates to a highly stable fluidized bed catalyst for producing acrylonitrile. 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 production has shifted f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887B01J23/883C07C255/08C07C253/02
CPCY02P20/52
Inventor 汪国军吴粮华陈卫军
Owner CHINA PETROLEUM & CHEM CORP
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