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Catalyst for ethylbenzene dehydrogenation in low steam to ethylbenzene ratio, preparation method and application thereof

A technology of ethylbenzene dehydrogenation and catalyst, which is applied in the direction of catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve the problems of poor stability of catalysts, achieve the effects of improving stability, enhancing stability, and enhancing self-regeneration ability

Active Publication Date: 2020-01-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is the problem of poor stability of catalysts under low water ratio conditions in the prior art, and a new low water ratio ethylbenzene dehydrogenation catalyst is provided, which is used for the preparation of ethylbenzene dehydrogenation Styrene reaction has the characteristics of good stability under the condition of low water ratio

Method used

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  • Catalyst for ethylbenzene dehydrogenation in low steam to ethylbenzene ratio, preparation method and application thereof
  • Catalyst for ethylbenzene dehydrogenation in low steam to ethylbenzene ratio, preparation method and application thereof
  • Catalyst for ethylbenzene dehydrogenation in low steam to ethylbenzene ratio, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] would be equivalent to 50.2 parts Fe 2 o 3 iron oxide red, equivalent to 19.0 parts Fe 2 o 3 Iron oxide yellow, equivalent to 5.81 parts K 2 Potassium carbonate of O, 5.73 parts of K 2 ZnO 2 , equivalent to 11.23 parts of CeO 2 of cerium nitrate, equivalent to 0.74 parts of WO 3 ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts of MgO, 0.85 parts of SrO, 1.98 parts of Eu 2 o 3 , 0.19 GeO 2 Stir in a kneader with 5.4 parts of graphite for 1.5 hours, add deionized water accounting for 28% of the total weight of the catalyst raw material, stir for 0.5 hour, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 6 mm, put them into an oven, 60 ℃ for 2 hours, 130 ℃ for 3 hours, then placed in a muffle furnace, calcined at 650 ℃ for 3 hours, and 920 ℃ for 3 hours to obtain the finished catalyst. The catalyst composition is listed in Table 1.

[0053] 100 milliliters of catalysts are loaded into the reactor, a...

Embodiment 2

[0061] Except with Gd 2 o 3 Replace Eu 2 o 3 Outside, catalyst preparation method and catalyst evaluation condition are with embodiment 1, specifically:

[0062] would be equivalent to 50.2 parts Fe 2 o 3 iron oxide red, equivalent to 19.0 parts Fe 2 o 3 Iron oxide yellow, equivalent to 5.81 parts K 2 Potassium carbonate of O, 5.73 parts of K 2 ZnO 2 , equivalent to 11.23 parts of CeO 2 of cerium nitrate, equivalent to 0.74 parts of WO 3 ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts of MgO, 0.85 parts of SrO, 1.98 parts of Gd 2 o 3 , 0.19 GeO 2 Stir in a kneader with 5.4 parts of graphite for 1.5 hours, add deionized water accounting for 28% of the total weight of the catalyst raw material, stir for 0.5 hour, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 6 mm, put them into an oven, 60 ℃ for 2 hours, 130 ℃ for 3 hours, then placed in a muffle furnace, calcined at 650 ℃ for 3 hours, and 920 ℃ f...

Embodiment 3

[0064] In addition to using Tb 2 o 3 Replace Eu 2 o 3 Outside, catalyst preparation method and catalyst evaluation condition are with embodiment 1, specifically:

[0065] would be equivalent to 50.2 parts Fe 2 o 3 iron oxide red, equivalent to 19.0 parts Fe 2 o 3 Iron oxide yellow, equivalent to 5.81 parts K 2 Potassium carbonate of O, 5.73 parts of K 2 ZnO 2 , equivalent to 11.23 parts of CeO 2 of cerium nitrate, equivalent to 0.74 parts of WO 3 ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts of MgO, 0.85 parts of SrO, 1.98 parts of Tb 2 o 3 , 0.19 GeO 2 Stir in a kneader with 5.4 parts of graphite for 1.5 hours, add deionized water accounting for 28% of the total weight of the catalyst raw material, stir for 0.5 hour, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 6 mm, put them into an oven, 60 ℃ for 2 hours, 130 ℃ for 3 hours, then placed in a muffle furnace, calcined at 650 ℃ for 3 hours, an...

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Abstract

The invention relates to a catalyst for ethylbenzene dehydrogenation in low steam to ethylbenzene ratio, a preparation method and application thereof. The problems that potassium in the existing catalyst in the prior art is prone to migrating and being washed away during the reaction of preparing styrene with ethylbenzene dehydrogenation, and the catalyst has poor stability are mainly solved. By adopting the technical scheme that the catalyst for ethylbenzene dehydrogenation in low steam to ethylbenzene ratio is prepared from the following components in percentage by weight: 66 to 76% of Fe2O3, 4 to 9% of K2O, 4 to 7% of K2ZnO2, 6 to 12% of CeO2, 0.5 to 4.5% of WO3, 0.5 to 4.5% of MgO, 0.5 to 5% of SrO, and 0.5 to 5% of heavy rare earth oxide, the heavy rare earth oxide is selected from one or more of Eu2O3, Gd2O3 or Tb2O3, 0.05 to 3% of the oxide is selected from Ge or Pb, and the catalyst for ethylbenzene dehydrogenation in low steam to ethylbenzene ratio can be used in the industrial production of styrene preparation from ethylbenzene dehydrogenation under the condition of low steam to ethylbenzene ratio.

Description

technical field [0001] The invention relates to a catalyst for producing styrene by dehydrogenation of ethylbenzene with a low water ratio, a preparation method and application thereof. Background technique [0002] Ethylbenzene dehydrogenation is a reversible reaction with strong endothermic and molecular increase. In the industry, inert gas is usually used as a diluent to reduce the partial pressure of ethylbenzene and promote the reaction to move to the product. The role of water vapor in the production of styrene is reflected in: [0003] (1) Heating the reaction raw materials to the required temperature, avoiding directly heating ethylbenzene to a higher temperature, and suppressing the generation of side reactions; [0004] (2) Supplement heat to avoid cooling due to endothermic reaction; [0005] (3) reduce the partial pressure of ethylbenzene and promote the equilibrium to move to the direction of styrene; [0006] (4) The carbon deposition on the catalyst is con...

Claims

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Application Information

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IPC IPC(8): B01J23/888C07C5/367C07C15/46
CPCB01J23/002B01J23/888C07C5/367B01J2523/00C07C2523/888C07C15/46B01J2523/13B01J2523/22B01J2523/24B01J2523/27B01J2523/3712B01J2523/3743B01J2523/69B01J2523/842B01J2523/375B01J2523/43B01J2523/3756B01J2523/42Y02P20/52Y02P20/584
Inventor 宋磊缪长喜朱敏徐永繁
Owner CHINA PETROLEUM & CHEM CORP
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