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Low-carbon ethylbenzene dehydrogenation catalyst, and preparation method and application thereof

A technology for ethylbenzene dehydrogenation and ethylbenzene dehydrogenation, which is applied in the direction of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problems of high reaction starting temperature and low activity, so as to improve activity and electronic efficiency. The effect of passing

Active Publication Date: 2016-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] One of the technical problems to be solved by this invention is that in the styrene catalyst of ethylbenzene dehydrogenation of previous documents, low-potassium catalyst (such as K in terms of mass percent content in the catalyst) is used. 2 O is less than 16%), low activity at low temperatures (such as below 620 ° C), leading to the technical problem of high reaction starting temperature, providing a new low-carbon catalyst for the preparation of styrene by dehydrogenation of ethylbenzene

Method used

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  • Low-carbon ethylbenzene dehydrogenation catalyst, and preparation method and application thereof
  • Low-carbon ethylbenzene dehydrogenation catalyst, and preparation method and application thereof
  • Low-carbon ethylbenzene dehydrogenation catalyst, and preparation method and application thereof

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Effect test

Embodiment 1

[0032] With 42.8 parts of iron oxide red (parts by weight are Fe 2 o 3 meter), 26.7 parts of iron oxide yellow (parts by weight are based on Fe 2 o 3 meter), 10.6 parts of potassium carbonate (parts by weight are in K 2 O), 12.8 parts of cerium oxalate (parts by weight are based on CeO 2 meter), 2.1 parts of ammonium molybdate (parts by weight are expressed as Mo 2 o 3 meter), 2.5 parts of calcium hydroxide (parts by weight are calculated as CaO), 3.0 parts of gallium nitrate (parts by weight are calculated as Ga 2 o 3 ) and 5.0 parts of carboxymethyl cellulose were stirred in a kneader for 1 hour, added deionized water, and stirred for another half an hour, took out the extruded strips, extruded into particles with a diameter of 3 mm and a length of 5 mm, and put them in an oven at 100 ° C Baked for 4 hours, then placed in a muffle furnace, and calcined at 850° C. for 4 hours to obtain a finished catalyst. See Table 1 for details in parts by weight of the catalyst comp...

Embodiment 2

[0035] With 45.3 parts of iron oxide red (parts by weight are Fe 2 o 3 meter), 34.7 parts of iron oxide yellow (parts by weight are based on Fe 2 o 3 meter), 6.0 parts of potassium carbonate (parts by weight are in K 2 O), 9.0 parts of cerium oxalate (parts by weight are based on CeO 2 meter), 0.7 parts of cerium carbonate (parts by weight are based on CeO 2 meter), 0.5 parts of ammonium molybdate (parts by weight are expressed as Mo 2 o 3 ), 5.0 parts of calcium oxide, 0.1 part of gallium oxide, 0.3 part of zinc oxide, 0.5 part of polystyrene microspheres, and 6.5 parts of carboxymethyl cellulose were stirred in a kneader for 1 hour, added deionized water, and stirred for another half an hour , take out the extruded strips, extrude into particles with a diameter of 3 mm and a length of 10 mm, put them into an oven, bake at 120°C for 4 hours, then place them in a muffle furnace, and roast at 710°C for 4 hours to obtain a finished catalyst. The weight parts of the catalys...

Embodiment 3

[0038] With 54.7 parts of iron oxide red (parts by weight are Fe 2 o 3 meter), 20.1 parts of iron oxide yellow (parts by weight are based on Fe 2 o 3meter), 10.8 parts of potassium carbonate (parts by weight are in K 2 O), 10.7 parts of cerium oxalate (parts by weight are based on CeO 2 meter), 1.9 parts of ammonium molybdate (parts by weight are Mo 2 o 3 ), 1.4 parts of calcium hydroxide (parts by weight are calculated as CaO), 1.5 parts of gallium nitrate (parts by weight are calculated as Ga 2 o 3 ), 4.0 parts of hydroxyethyl cellulose, and 4.0 parts of carboxymethyl cellulose were stirred in a kneader for 1 hour, added deionized water, and stirred for another half an hour. The particles were put into an oven, baked at 85°C for 4 hours, then placed in a muffle furnace, and calcined at 825°C for 4 hours to obtain a finished catalyst. The parts by weight of the obtained catalyst composition are shown in Table 1.

[0039] The results of the activity evaluation test car...

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Abstract

The invention relates to a low-carbon ethylbenzene dehydrogenation catalyst, and a preparation method and an application thereof. The invention mainly aims at solving the technical problem of a high reaction initial point temperature caused by low low-temperature activity of low-potassium catalysts in prior arts. The low-carbon ethylbenzene dehydrogenation catalyst is composed of the following components, by weight: 60-80 parts of Fe2O3, 6-15 parts of K2O, 6-15 parts of CeO2, 0.5-4 parts of Mo2O3, 0.5-5 parts of CaO, and 0.1-3 parts of Ga2O3. With the technical scheme, the technical problem is well solved. The method can be used in industrial productions of styrene prepared through ethylbenzene dehydrogenation.

Description

technical field [0001] The invention discloses a low-carbon ethylbenzene dehydrogenation catalyst and its preparation method and application. Background technique [0002] At present, the vast majority of styrene in the industry is produced by catalytic dehydrogenation of ethylbenzene, and the basic composition of the catalyst includes a main catalyst, a co-catalyst, a pore-forming agent and a binder. Early catalysts were Fe-K-Cr systems, such as published US patents 4,144,197, 4,467,046 and European patent 0,296,285A1. Although this type of catalyst has good activity and stability, it has been phased out gradually because the catalyst contains Cr oxides and causes certain pollution to the environment. Later, it evolved into Fe-K-Ce-Mo series, replacing Cr with Ce, which can better improve the activity and stability of the catalyst, and at the same time overcome the disadvantages of high toxicity and environmental pollution of Cr, and has been adopted by styrene manufacture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887C07C5/333C07C15/46
Inventor 危春玲宋磊缪长喜朱敏徐永繁
Owner CHINA PETROLEUM & CHEM CORP