Low water ratio ethylbenzene dehydrogenation catalyst

A dehydrogenation catalyst, low water ratio technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc., can solve the problems of low activity and poor stability of low potassium catalysts , to achieve high activity, enhance electron transfer ability, improve activity and stability

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 fo

Method used

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  • Low water ratio ethylbenzene dehydrogenation catalyst
  • Low water ratio ethylbenzene dehydrogenation catalyst
  • Low water ratio ethylbenzene dehydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] would be equivalent to 58.37 parts Fe 2 o 3 iron oxide red, equivalent to 18.18 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 ZrO 2 , 1.68 copies of Dy 2 o 3and 5.69 parts of sodium carboxymethylcellulose were stirred in a kneader for 1.5 hours, added deionized water accounting for 25% of the total weight of the catalyst raw material, stirred for 0.5 hour, took out the extruded strips, and 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, and then at 920°C for 3 hours to obtain a finished catalyst. The composition of the catalyst is listed in Table 1.

[0039] 100 milliliters of catalyst...

Embodiment 2

[0047] In addition to using Tb 2 o 3 replace Dy 2 o 3 Except, catalyst preparation method and catalyst evaluation conditions are all identical with embodiment 1, specifically:

[0048] would be equivalent to 58.37 parts Fe 2 o 3 iron oxide red, equivalent to 18.18 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 ZrO 2 , 1.68 Tb 2 o 3 and 5.69 parts of sodium carboxymethylcellulose were stirred in a kneader for 1.5 hours, added deionized water accounting for 25% of the total weight of the catalyst raw material, stirred for 0.5 hour, took out the extruded strips, and 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 ...

Embodiment 3

[0053] In addition to using Ho 2 o 3 replace Dy 2 o 3 Except, catalyst preparation method and catalyst evaluation conditions are all identical with embodiment 1, specifically:

[0054] would be equivalent to 58.37 parts Fe 2 o 3 iron oxide red, equivalent to 18.18 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 ZrO 2 , 1.68 copies of Ho 2 o 3 and 5.69 parts of sodium carboxymethylcellulose were stirred in a kneader for 1.5 hours, added deionized water accounting for 25% of the total weight of the catalyst raw material, stirred for 0.5 hour, took out the extruded strips, and 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, an...

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Abstract

The present invention relates to a low water ratio ethylbenzene dehydrogenation catalyst and a preparation method thereof. A purpose of the present invention is mainly to solve the problems of poor stability and low activity of the low potassium catalyst under the low water ratio condition in the prior art. According to the present invention, the low water ratio ethylbenzene dehydrogenation catalyst comprises, 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 ZrO2, and 0.5-5% of a medium rare earth oxide, wherein the medium rare earth oxide is at least one selected from Dy2O3, Tb2O3 and Ho2O3; with the technical scheme, the problems in the prior art are well solved; and the dehydrogenation catalyst can be used for the styrene preparation under the low water ratio condition through the ethylbenzene dehydrogenation in the industrial production.

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