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Catalyst for ethylbenzene dehydrogenation in low water ratio

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 catalyst stability and achieve improved stability, Good technical effect, the effect of improving stability

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

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Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is the problem of poor stability of catalysts under low water ratio conditions in the prior art, and a new low water ratio ethylbenzene dehydrogenation catalyst is provided, which is used for the preparation of ethylbenzene dehydrogenation Styrene reaction has the characteristics of good stability under the condition of low water ratio

Method used

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  • Catalyst for ethylbenzene dehydrogenation in low water ratio
  • Catalyst for ethylbenzene dehydrogenation in low water ratio
  • Catalyst for ethylbenzene dehydrogenation in low water ratio

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Experimental program
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Embodiment 1

[0048] would be equivalent to 47.39 parts Fe 2 o 3 iron oxide red, equivalent to 23.1 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 5.49 parts K 2 Potassium carbonate of O, equivalent to 2.75 parts K 2 Potassium oxalate of O, 7.29 parts CeO 2 , equivalent to 1.67 WO 3 ammonium tungstate, 1.5 parts of MgO, 2.49 parts of CaO, 2.94 parts of Pm 2 o 3 , 1.62 parts of ZnO, 3.76 parts of cement and 5.4 parts of sodium carboxymethylcellulose were stirred in a kneader for 2.0 hours, added deionized water accounting for 28% of the total weight of the catalyst raw materials, stirred for 1.0 hours, took out the extrusion, and extruded into a diameter of 3 mm and 6 mm in length, put them in an oven, bake at 70°C for 2 hours, and bake at 155°C for 3 hours, then place them in a muffle furnace, roast at 450°C for 3 hours, and roast at 950°C for 3 hours to obtain the finished catalyst. The composition of the catalyst is listed in Table 1.

[0049] 100 milliliters of catalyzers ar...

Embodiment 2

[0057] Except for Eu 2 o 3 Replace Pm 2 o 3 Outside, catalyst preparation method and catalyst evaluation condition are with embodiment 1, specifically:

[0058] would be equivalent to 47.39 parts Fe 2 o 3 iron oxide red, equivalent to 23.1 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 5.49 parts K 2 Potassium carbonate of O, equivalent to 2.75 parts K 2 Potassium oxalate of O, 7.29 parts CeO 2 , equivalent to 1.67 WO 3 ammonium tungstate, 1.5 parts of MgO, 2.49 parts of CaO, 2.94 parts of Eu 2 o 3 , 1.62 parts of ZnO, 3.76 parts of cement and 5.4 parts of sodium carboxymethylcellulose were stirred in a kneader for 2.0 hours, added deionized water accounting for 28% of the total weight of the catalyst raw materials, stirred for 1.0 hours, took out the extrusion, and extruded into a diameter of 3 mm and 6 mm in length, put them in an oven, bake at 70°C for 2 hours, and bake at 155°C for 3 hours, then place them in a muffle furnace, roast at 450°C for 3 hours, an...

Embodiment 3

[0060] Except with Gd 2 o 3 Replace Pm 2 o 3 Outside, catalyst preparation method and catalyst evaluation condition are with embodiment 1, specifically:

[0061] would be equivalent to 47.39 parts Fe 2 o 3 iron oxide red, equivalent to 23.1 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 5.49 parts K 2 Potassium carbonate of O, equivalent to 2.75 parts K 2 Potassium oxalate of O, 7.29 parts CeO 2 , equivalent to 1.67 WO 3 ammonium tungstate, 1.5 parts of MgO, 2.49 parts of CaO, 2.92 parts of Gd 2 o 3 , 1.62 parts of ZnO, 3.76 parts of cement and 5.4 parts of sodium carboxymethylcellulose were stirred in a kneader for 2.0 hours, added deionized water accounting for 28% of the total weight of the catalyst raw materials, stirred for 1.0 hours, took out the extrusion, and extruded into a diameter of 3 mm and 6 mm in length, put them in an oven, bake at 70°C for 2 hours, and bake at 155°C for 3 hours, then place them in a muffle furnace, roast at 450°C for 3 hours, a...

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Abstract

The invention relates to a catalyst for ethylbenzene dehydrogenation in a low water ratio, mainly solving the problem that the stability of the catalyst is poor in the prior art. The adopted technical scheme is as follows: the catalyst for ethylbenzene dehydrogenation in the low water ratio comprises the following ingredients by weight percent: 65-76% of Fe2O3, 6-11% of K2O, 6-11% of CeO2, 0.5-5% of WO3, 0.5-5% of MgO, 0.5-5% of CaO, 0.5-5% of middle-weight rare earth oxide, 2-5% of an adhesive and 0.001-5% of oxide, wherein 33-50% of K2O derives from potassium oxalate; the middle-weight rare earth oxide is selected from at least one of Pm2O3, Eu2O3, Gd2O3 or Dy2O3; the adhesive is selected from one of kaolin, diatomite or cement; and the oxide is selected from at least one of Cu, Zn or Ti. The catalyst can be used for industrial production of preparation of styrene by ethylbenzene dehydrogenation under the low water ratio condition.

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] Ethylbenzene dehydrogenation is a reversible reaction with strong endothermic and molecular increase. In the industry, inert gas is usually used as a diluent to reduce the partial pressure of ethylbenzene and promote the reaction to move to the product. The role of water vapor in the production of styrene is reflected in: [0003] (1) Heating the reaction raw materials to the required temperature, avoiding directly heating ethylbenzene to a higher temperature, and suppressing the generation of side reactions; [0004] (2) Supplement heat to avoid cooling due to endothermic reaction; [0005] (3) reduce the partial pressure of ethylbenzene and promote the equilibrium to move to the direction of styrene; [0006] (4) The carbon deposition on the catalyst is continuously remove...

Claims

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Application Information

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IPC IPC(8): B01J23/888C07C15/46C07C5/333
Inventor 宋磊危春玲缪长喜朱敏徐永繁
Owner CHINA PETROLEUM & CHEM CORP
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