Catalyst used for producing styrene via ethylbenzene dehydrogenation

A technology for the dehydrogenation of ethylbenzene and styrene, which is applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc., and can solve the problems of reduced catalyst activity and high catalyst production costs

Active Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the technical problems to be solved by the present invention is that the high content of cerium in the catalyst used in the production of styrene in the past leads to high production cost of styrene catalyst, and the problem that the reduction of cerium content leads to the decline of catalyst activity. A new ethylbenzene dehydrogenation method is provided Catalyst for the production of styrene; the catalyst has the advantage of maintaining a high catalytic activity at a reduced cerium content

Method used

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  • Catalyst used for producing styrene via ethylbenzene dehydrogenation
  • Catalyst used for producing styrene via ethylbenzene dehydrogenation
  • Catalyst used for producing styrene via ethylbenzene dehydrogenation

Examples

Experimental program
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Embodiment 1

[0036] 1. Catalyst preparation

[0037] Mix 65 parts of red iron oxide, 6 parts of potassium oxide, 2 parts of cerium oxide, 7 parts of magnesium oxide, 0.3 parts of calcium oxide, 0.5 parts of zinc oxide, 2 parts of nickel oxide, and 4 parts of carboxymethyl cellulose, and add 40 Part deionized water, knead the wet material into a dough-like material suitable for extrusion, extrude, cut into pellets, age at room temperature for 10 hours, put in an oven, dry at 80°C for 6 hours, place in a roasting furnace, and bake at 800°C The catalyst finished product was obtained in 2 hours, and for the convenience of comparison, the composition of the catalyst is listed in Table 1.

[0038] 2. Catalyst evaluation

[0039] Load 100ml of catalyst into the evaluation reactor, the reaction pressure is normal pressure, the reaction temperature is 620°C, the mass ratio of water / ethylbenzene is 2.0, and the liquid volume space velocity of ethylbenzene is 1.0h -1 Catalytic activity evaluation w...

Embodiment 2

[0041] 1. Catalyst preparation

[0042] Mix 94 parts of red iron oxide, 9.5 parts of potassium oxide, 3 parts of cerium oxide, 8 parts of magnesium oxide, 7 parts of calcium oxide, 1.2 parts of zinc oxide, 0.2 parts of nickel oxide, and 4 parts of carboxymethyl cellulose, and add 40 Part deionized water, knead the wet material into a dough-like material suitable for extrusion, extrude, cut into pellets, age at room temperature for 10 hours, put in an oven, dry at 80°C for 6 hours, place in a roasting furnace, and bake at 800°C The catalyst finished product was obtained in 2 hours, and for the convenience of comparison, the composition of the catalyst is listed in Table 1.

[0043] 2. Catalyst evaluation

[0044] Load 100ml of catalyst into the evaluation reactor, the reaction pressure is normal pressure, the reaction temperature is 620°C, the mass ratio of water / ethylbenzene is 2.0, and the liquid volume space velocity of ethylbenzene is 1.0h -1 Catalytic activity evaluation...

Embodiment 3

[0046] 1. Catalyst preparation

[0047] Mix 66 parts of red iron oxide, 9 parts of potassium oxide, 5 parts of cerium oxide, 0.8 parts of magnesium oxide, 8 parts of calcium oxide, 0.1 part of zinc oxide, 4 parts of nickel oxide, 4 parts of carboxymethyl cellulose, and add 40 Part deionized water, knead the wet material into a dough-like material suitable for extrusion, extrude, cut into pellets, age at room temperature for 10 hours, put in an oven, dry at 80°C for 6 hours, place in a roasting furnace, and bake at 800°C The catalyst finished product was obtained in 2 hours, and for the convenience of comparison, the composition of the catalyst is listed in Table 1.

[0048] 2. Catalyst evaluation

[0049] Load 100ml of catalyst into the evaluation reactor, the reaction pressure is normal pressure, the reaction temperature is 620°C, the mass ratio of water / ethylbenzene is 2.0, and the liquid volume space velocity of ethylbenzene is 1.0h -1 Catalytic activity evaluation was ca...

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Abstract

The invention relates to a catalyst used for producing styrene via ethylbenzene dehydrogenation, and a production method of styrene. The catalyst is used for solving problems of conventional styrene production that styrene catalyst production cost is high because of high cerium content of conventional catalysts, and catalyst cavity is reduced by reducing of cerium content. The catalyst used for producing styrene via ethylbenzene dehydrogenation comprises, by weight, 65 to 95 parts of Fe2O3, 5 to 10 parts of K2O, 2 to 8 parts of Ce2O3, 0.1 to 8 parts of MgO, 0.1 to 8 parts of CaO, 0.01 to 4 parts of ZnO, and 0.01 to 4 parts of Ni2O3. The catalyst contains no molybdenum or other oxides, and can be applied to styrene production via ethylbenzene dehydrogenation.

Description

technical field [0001] The invention relates to a catalyst for producing styrene by dehydrogenation of ethylbenzene and a production method of styrene. Background technique [0002] At present, the industrial production of styrene is made by the dehydrogenation of ethylbenzene. One of the key points of this production method is to select a high-efficiency dehydrogenation catalyst. Most of the ethylbenzene dehydrogenation catalysts are Fe-K-Ce-Mo catalysts. In this type of catalyst system, Ce is an indispensable additive and plays an important role in catalytic activity. Therefore, its usage has been continuously increased to increase catalyst activity. A lot of pressure. Chinese patent 96116541.3 invented a dehydrogenation process for the production of styrene. The catalyst used in the dehydrogenation process has high activity and product yield, and has strong self-regeneration ability, but the use content of rare earth elements Due to the increasing price of rare earth el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07C15/46C07C5/333
Inventor 范勤刘剑锋陈铜倪军平缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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