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Lowwater ratio catalyst and preparation method

An ethylbenzene dehydrogenation and catalyst technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as poor catalyst stability, and achieve improved stability. , improve stability, enhance the effect of self-regeneration ability

Active Publication Date: 2019-05-14
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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  • Lowwater ratio catalyst and preparation method
  • Lowwater ratio catalyst and preparation method
  • Lowwater ratio catalyst and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] would be equivalent to 49.7 parts Fe 2 o 3 iron oxide red, equivalent to 19.5 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 5.81 parts K 2 Potassium carbonate of O, 5.73 parts of K 2 TiO 3 , equivalent to 11.23 parts of CeO 2 of cerium acetate, equivalent to 0.74 parts of WO 3 ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts of MgO, 0.85 parts of CaO, 1.98 parts of Eu 2 o 3 , 0.19 parts of HfO 2 Stir in a kneader with 5.4 parts of graphite for 1.5 hours, add deionized water accounting for 25% of the total weight of the catalyst raw material, stir for 0.5 hour, take out the extruded strips, extrude into particles with a diameter of 3 mm and a length of 6 mm, put into an oven, 60 ℃ for 2 hours, 130 ℃ for 3 hours, then placed in a muffle furnace, calcined at 550 ℃ for 3 hours, and 980 ℃ for 3 hours to obtain the finished catalyst. The composition of the catalyst is listed in Table 1.

[0049] 100 milliliters of catalysts are loaded into the r...

Embodiment 2

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

[0058] would be equivalent to 49.7 parts Fe 2 o 3 iron oxide red, equivalent to 19.5 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 5.81 parts K 2 Potassium carbonate of O, 5.73 parts of K 2 TiO 3 , equivalent to 11.23 parts of CeO 2 of cerium acetate, equivalent to 0.74 parts of WO 3 ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts of MgO, 0.85 parts of CaO, 1.98 parts of Gd 2 o 3 , 0.19 parts of HfO 2 Stir in a kneader with 5.4 parts of graphite for 1.5 hours, add deionized water accounting for 25% of the total weight of the catalyst raw material, stir for 0.5 hour, take out the extruded strips, extrude into particles with a diameter of 3 mm and a length of 6 mm, put into an oven, 60 ℃ for 2 hours, 130 ℃ for 3 hours, then placed in a muffle furnace, calcined at 550 ℃ for 3 hours, and 980 ℃...

Embodiment 3

[0060] In addition to using Dy 2 o 3 Replace Eu 2 o 3 Outside, catalyst preparation method and catalyst evaluation condition are with embodiment 1, specifically:

[0061] would be equivalent to 49.7 parts Fe 2 o 3 iron oxide red, equivalent to 19.5 parts of Fe 2 o 3 Iron oxide yellow, equivalent to 5.81 parts K 2 Potassium carbonate of O, 5.73 parts of K 2 TiO 3 , equivalent to 11.23 parts of CeO 2 of cerium acetate, equivalent to 0.74 parts of WO 3 ammonium tungstate, magnesium hydroxide equivalent to 4.27 parts of MgO, 0.85 parts of CaO, 1.98 parts of Dy 2 o 3 , 0.19 parts of HfO 2 Stir in a kneader with 5.4 parts of graphite for 1.5 hours, add deionized water accounting for 25% of the total weight of the catalyst raw material, stir for 0.5 hour, take out the extruded strips, extrude into particles with a diameter of 3 mm and a length of 6 mm, put into an oven, 60 ℃ for 2 hours, 130 ℃ for 3 hours, then placed in a muffle furnace, calcined at 550 ℃ for 3 hours, ...

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Abstract

The invention relates to a catalyst for ethylbenzene dehydrogenation in a low water ratio and a preparation method thereof, mainly solving the problems that potassium in the catalyst easily migrates and loses in the reaction process of preparation of styrene by ethylbenzene dehydrogenation, and 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: 66-76% of Fe2O3, 4-9% of K2O, 4-7% of K2TiO3, 6-12% 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 and 0.05-3% of oxides selected from Hf or Zr, wherein the middle-weight rare earth oxide is selected from at least one of Eu2O3, Gd2O3 or Dy2O3. 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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888C07C5/333C07C15/46
Inventor 宋磊缪长喜朱敏危春玲徐永繁
Owner CHINA PETROLEUM & CHEM CORP