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Dehydrogenation catalyst for preparing styrene, preparation method and application thereof

A dehydrogenation catalyst and catalyst technology, applied in the direction of catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve the problems of high by-product toluene and low selectivity of low-potassium catalysts, and achieve less by-product toluene and selectivity for styrene sex high effect

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

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the low selectivity of low-potassium catalysts and high by-product toluene in the prior art, and a new dehydrogenation catalyst for the preparation of styrene is provided

Method used

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  • Dehydrogenation catalyst for preparing styrene, preparation method and application thereof
  • Dehydrogenation catalyst for preparing styrene, preparation method and application thereof
  • Dehydrogenation catalyst for preparing styrene, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] would be equivalent to 56.02 parts Fe 2 o 3 iron oxide red, equivalent to 15.69 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 9.35 parts K 2 Potassium carbonate of O, equivalent to 8.7 parts CeO 2 of cerium oxalate, equivalent to 2.76 parts of WO 3 ammonium tungstate, calcium hydroxide equivalent to 3.3 parts of CaO, 2.86 parts of Sc 2 o 3 , 1.32 parts of HfO 2 Stir in a kneader with 5.2 parts of graphite for 2 hours, add deionized water accounting for 22.3% of the total weight of the catalyst raw material, stir for 0.8 hours, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 6 mm, and put them into an oven. ℃ for 2.5 hours, 130 ℃ for 3.0 hours, then placed in a muffle furnace, calcined at 650 ℃ for 3 hours, and 960 ℃ 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 into the reactor, at normal pressure, liquid sp...

Embodiment 2

[0048] Except for ZrO 2 replace HfO 2 Outside, catalyst preparation method and catalyst evaluation condition are with embodiment 1, specifically:

[0049] would be equivalent to 56.02 parts Fe 2 o 3 iron oxide red, equivalent to 15.69 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 9.35 parts K 2 Potassium carbonate of O, equivalent to 8.7 parts CeO 2 of cerium oxalate, equivalent to 2.76 parts of WO 3 ammonium tungstate, calcium hydroxide equivalent to 3.3 parts of CaO, 2.86 parts of Sc 2 o 3 , 1.32 parts of ZrO 2 Stir in a kneader with 5.2 parts of graphite for 2 hours, add deionized water accounting for 22.3% of the total weight of the catalyst raw material, stir for 0.8 hours, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 6 mm, and put them into an oven. ℃ for 2.5 hours, 130 ℃ for 3.0 hours, then placed in a muffle furnace, calcined at 650 ℃ for 3 hours, and 960 ℃ for 3 hours to obtain the finished catalyst. ...

Embodiment 3

[0051] Except for TiO 2 replace HfO 2 Outside, catalyst preparation method and catalyst evaluation condition are with embodiment 1, specifically:

[0052] would be equivalent to 56.02 parts Fe 2 o 3 iron oxide red, equivalent to 15.69 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 9.35 parts K 2 Potassium carbonate of O, equivalent to 8.7 parts of cerium oxalate, equivalent to 2.76 parts of WO 3 ammonium tungstate, calcium hydroxide equivalent to 3.3 parts of CaO, 2.86 parts of Sc 2 o 3 , 1.32 parts of TiO 2 Stir in a kneader with 5.2 parts of graphite for 2 hours, add deionized water accounting for 22.3% of the total weight of the catalyst raw material, stir for 0.8 hours, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 6 mm, and put them into an oven. ℃ for 2.5 hours, 130 ℃ for 3.0 hours, then placed in a muffle furnace, calcined at 650 ℃ for 3 hours, and 960 ℃ for 3 hours to obtain the finished catalyst. The com...

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Abstract

The invention relates to a dehydrogenation catalyst for preparing styrene, a preparation method and application thereof. The problems of low selectivity of a low-potassium catalyst and high by-producttoluene in the prior art are mainly solved. By adopting the technical scheme that the dehydrogenation catalyst for preparing styrene is prepared from the following components in percentage by weight:65 to 80% Fe2O3, 6 to 11% of K2O, 6 to 10% of CeO2, 0.5 to 5% of WO3, 0.5 to 5% of CaO, 0.5 to 5% of Sc2O3, and 0.5 to 5% of one or more selected from HfO2, ZrO2 or TiO2, the problem is well solved,and the dehydrogenation catalyst for preparing styrene can be used in the industrial production of styrene preparation with ethylbenzene dehydrogenation.

Description

technical field [0001] The invention relates to a dehydrogenation catalyst for preparing styrene, its preparation method and application. Background technique [0002] Catalytic dehydrogenation of ethylbenzene has always been the leading technical route for the production of styrene at home and abroad. Its production capacity accounts for about 85% of the total production capacity of styrene. Toluene and benzene are the main by-products. The by-product benzene can be separated by rectification unit Returning to the ethylbenzene unit for recycling, toluene with low economic value can only be sold as a by-product at a low price. Reducing the amount of toluene generated can improve the utilization rate of raw material ethylbenzene, reduce the material consumption of the device, and increase economic benefits. One of the keys to the catalytic dehydrogenation of ethylbenzene is the catalyst for the preparation of styrene from ethylbenzene dehydrogenation. The basic composition o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C07C5/367C07C15/46
CPCB01J23/002B01J23/888C07C5/367B01J2523/00C07C2523/888Y02P20/52
Inventor 宋磊缪长喜朱敏危春玲徐永繁
Owner CHINA PETROLEUM & CHEM CORP
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