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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AI-Extracted 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 ethylben...

Method used

Above embodiment illustrates, in iron-potassium-cerium-tungsten-magnesium-strontium catalyzed system, adopt to add part potassium and add medium rare earth oxide Eu2O3, Gd2O3 or Tb2O3 at least one in potassium zincate form, catalyst resistance The carbon deposition ability is...

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.

Application Domain

Heterogenous catalyst chemical elementsCatalysts +6

Technology Topic

OxideStyrene +6

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Examples

Experimental program(11)
Comparison scheme(4)

Example Embodiment

[0051] [Example 1]

[0052] Will be equivalent to 50.2 parts Fe 2 O 3 Iron oxide red, equivalent to 19.0 parts Fe 2 O 3 Of iron oxide yellow, equivalent to 5.81 parts of K 2 O's potassium carbonate, 5.73 parts of K 2 ZnO 2 , Equivalent to 11.23 CeO 2 Cerium nitrate, equivalent to 0.74 parts WO 3 Ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts MgO, 0.85 parts SrO, 1.98 parts Eu 2 O 3 , 0.19 parts GeO 2 And 5.4 parts of graphite were stirred in a kneader for 1.5 hours, and 28% of the total weight of the catalyst raw material was added with deionized water, mixed for 0.5 hours, and the extruded bar was taken out, extruded into particles with a diameter of 3 mm and a length of 6 mm, and placed in an oven. Bake at ℃ for 2 hours and at 130 ℃ for 3 hours, and then placed in a muffle furnace, calcined at 650°C for 3 hours and 920°C for 3 hours to obtain the finished catalyst. The catalyst composition is listed in Table 1.

[0053] Load 100 ml of catalyst into the reactor, at normal pressure, liquid space velocity for 1.0 hour -1 The activity and stability were evaluated under the conditions of 620°C and 0.65 water ratio (weight). The evaluation results are listed in Table 2.

Example Embodiment

[0060] [Example 2]

[0061] Except using Gd 2 O 3 Replace Eu 2 O 3 In addition, the catalyst preparation method and catalyst evaluation conditions are the same as in Example 1, specifically:

[0062] Will be equivalent to 50.2 parts Fe 2 O 3 Iron oxide red, equivalent to 19.0 parts Fe 2 O 3 Of iron oxide yellow, equivalent to 5.81 parts of K 2 O's potassium carbonate, 5.73 parts of K 2 ZnO 2 , Equivalent to 11.23 CeO 2 Cerium nitrate, equivalent to 0.74 parts WO 3 Ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts MgO, 0.85 parts SrO, 1.98 parts Gd 2 O 3 , 0.19 parts GeO 2 And 5.4 parts of graphite were stirred in a kneader for 1.5 hours, and 28% of the total weight of the catalyst raw material was added with deionized water, mixed for 0.5 hours, and the extruded bar was taken out, extruded into particles with a diameter of 3 mm and a length of 6 mm, and placed in an oven. Bake at ℃ for 2 hours and at 130 ℃ for 3 hours, and then placed in a muffle furnace, calcined at 650°C for 3 hours and 920°C for 3 hours to obtain the finished catalyst. The catalyst composition is listed in Table 1. The evaluation results are shown in Table 2.

Example Embodiment

[0063] [Example 3]

[0064] Except using Tb 2 O 3 Replace Eu 2 O 3 In addition, the catalyst preparation method and catalyst evaluation conditions are the same as in Example 1, specifically:

[0065] Will be equivalent to 50.2 parts Fe 2 O 3 Iron oxide red, equivalent to 19.0 parts Fe 2 O 3 Of iron oxide yellow, equivalent to 5.81 parts of K 2 O's potassium carbonate, 5.73 parts of K 2 ZnO 2 , Equivalent to 11.23 CeO 2 Cerium nitrate, equivalent to 0.74 parts WO 3 Ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts MgO, 0.85 parts SrO, 1.98 parts Tb 2 O 3 , 0.19 parts GeO 2 And 5.4 parts of graphite were stirred in a kneader for 1.5 hours, and 28% of the total weight of the catalyst raw material was added with deionized water, mixed for 0.5 hours, and the extruded bar was taken out, extruded into particles with a diameter of 3 mm and a length of 6 mm, and placed in an oven. Bake at ℃ for 2 hours and at 130 ℃ for 3 hours, and then placed in a muffle furnace, calcined at 650°C for 3 hours and 920°C for 3 hours to obtain the finished catalyst. The catalyst composition is listed in Table 1. The evaluation results are shown in Table 2.

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Classification and recommendation of technical efficacy words

Improve stability

Agent delivering system comprised of microparticle and biodegradable gel with an improved releasing profile and methods of use thereof

InactiveUS6287588B1increase stabilityimprove stability

Owner:BTG INT LTD

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

AI-Extracted Technical Summary

Problems solved by technology

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Abstract

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Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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