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Low steam-to-oil ratio ethylbenzene dehydrogenation catalyst

A technology of ethylbenzene dehydrogenation and catalyst, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc., can solve the problems of poor stability and low activity of low-potassium catalysts, Achieve the effect of improving electron transfer ability, high activity, and enhancing self-regeneration ability

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of poor stability and low activity of low-potassium catalysts in the prior art under low water ratio conditions, and a new catalyst for preparing styrene by dehydrogenation of ethylbenzene is provided. The catalyst used in the dehydrogenation of ethylbenzene has the characteristics of good stability and high activity under the condition of low water ratio

Method used

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  • Low steam-to-oil ratio ethylbenzene dehydrogenation catalyst
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  • Low steam-to-oil ratio ethylbenzene dehydrogenation catalyst

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Experimental program
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Effect test

Embodiment 1

[0039] would be equivalent to 58.22 parts Fe 2 o 3 iron oxide red, equivalent to 18.15 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 7.7 parts K 2 Potassium carbonate of O, equivalent to 7.21 parts of CeO 2 of cerium oxalate, equivalent to 2.58 parts of WO 3 ammonium tungstate, barium hydroxide equivalent to 1.12 parts of BaO, 3.16 parts of Nb 2 o 5 , 1.86 Eu 2 o 3and 5.69 parts of sodium carboxymethyl cellulose were stirred in a kneader for 1.5 hours, added deionized water accounting for 24.5% of the catalyst raw material gross weight, stirred for 0.5 hours, took out the extruded strips, extruded into particles with a diameter of 3 mm and a length of 6 mm, Put it into an oven, bake at 60°C for 2 hours, and bake at 130°C for 3 hours, then place it in a muffle furnace, and bake it at 550°C for 3 hours, then at 960°C for 3 hours to obtain the finished catalyst. The composition of the catalyst is listed in Table 1.

[0040] 100 milliliters of catalysts are loaded in...

Embodiment 2

[0048] In addition to using Tb 2 o 3 Replace Eu 2 o 3 Except, catalyst preparation method and catalyst evaluation conditions are all identical with embodiment 1, specifically:

[0049] would be equivalent to 58.22 parts Fe 2 o 3 iron oxide red, equivalent to 18.15 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 7.7 parts K 2 Potassium carbonate of O, equivalent to 7.21 parts of CeO 2 of cerium oxalate, equivalent to 2.58 parts of WO 3 ammonium tungstate, barium hydroxide equivalent to 1.12 parts of BaO, 3.16 parts of Nb 2 o 5 , 1.86 Tb 2 o 3 and 5.69 parts of sodium carboxymethyl cellulose were stirred in a kneader for 1.5 hours, added deionized water accounting for 24.5% of the catalyst raw material gross weight, stirred for 0.5 hours, took out the extruded strips, extruded into particles with a diameter of 3 mm and a length of 6 mm, Put it into an oven, bake at 60°C for 2 hours, and bake at 130°C for 3 hours, then place it in a muffle furnace, and bake it at ...

Embodiment 3

[0054] In addition to using Ho 2 o 3 Replace Eu 2 o 3 Except, catalyst preparation method and catalyst evaluation conditions are all identical with embodiment 1, specifically:

[0055] would be equivalent to 58.22 parts Fe 2 o 3 iron oxide red, equivalent to 18.15 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 7.7 parts K 2 Potassium carbonate of O, equivalent to 7.21 parts of CeO 2 of cerium oxalate, equivalent to 2.58 parts of WO 3 ammonium tungstate, barium hydroxide equivalent to 1.12 parts of BaO, 3.16 parts of Nb 2 o 5 , 1.86 copies of Ho 2 o 3 and 5.69 parts of sodium carboxymethyl cellulose were stirred in a kneader for 1.5 hours, added deionized water accounting for 24.5% of the catalyst raw material gross weight, stirred for 0.5 hours, took out the extruded strips, extruded into particles with a diameter of 3 mm and a length of 6 mm, Put it into an oven, bake at 60°C for 2 hours, and bake at 130°C for 3 hours, then place it in a muffle furnace, and b...

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Abstract

The invention relates to a low steam-to-oil ratio ethylbeneze dehydrogenation catalyst and a preparing method thereof. The low steam-to-oil ethylbeneze dehydronation catalyst mainly solves the problems that in the prior art, a low-potassium catalyst has poor stability and low activity under the condition of a low steam-to-oil ratio. According to the technical scheme, the low steam-to-oil ratio ethylbeneze dehydrogenation catalyst is prepared from, by weight, 66-79% of Fe2O3, 4-9% of K2O, 6-11% of CeO2, 1-5% of WO3, 0.5-5% of BaO, 0.5-8% of Nb2O5 and 0.5-5% of middle rare earth oxide, wherein the middle rare earth oxide is selected from at least one of Eu2O3, Tb2O3 and Ho2O3, the problems in the prior art are favorably solved, and the low steam-to-oil ratio ethylbenzene dehydrogenation catalyst can be used in industrial production of using ethylbenzene dehydrogenation to prepare styrene under the condition of the low steam-to-oil ratio.

Description

technical field [0001] The invention relates to a catalyst for preparing styrene by dehydrogenating ethylbenzene with a low water ratio and a preparation method thereof. Background technique [0002] The main reaction for the dehydrogenation of ethylbenzene is C 6 h 5 -C 2 h 5 →C 6 h 5 CH=CH 2 +H 2 +124KJ / mol. From a thermodynamic point of view, reducing the partial pressure of ethylbenzene is beneficial to the balance, so water vapor is usually added in industry to promote the reaction to move toward the product. The latest development trend of ethylbenzene dehydrogenation to styrene technology is to reduce raw material consumption and improve energy efficiency. The latent heat of vaporization of water is very large, and the styrene production process consumes a large amount of superheated steam as the dehydrogenation medium, which makes the process consume a lot of energy and the production cost remains high. It is an urgent need for styrene plants, especially la...

Claims

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Application Information

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IPC IPC(8): B01J23/888C07C15/46C07C5/333
Inventor 宋磊朱敏缪长喜危春玲
Owner CHINA PETROLEUM & CHEM CORP
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