Catalyst for preparing butadiene through oxidative dehydrogenation of butene and preparation method thereof

An oxidative dehydrogenation and catalyst technology, applied in the direction of carbon compound catalysts, physical/chemical process catalysts, catalysts, etc., can solve the problem of low selectivity of butadiene, and achieve the effects of high selectivity, stable performance and high stability

Inactive Publication Date: 2020-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the low selectivity of butadiene used in the production process of butadiene by oxidative dehydrogenation of butene, and a new butadiene production process by oxidative dehydrogenation of butene is provided. catalyst

Method used

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  • Catalyst for preparing butadiene through oxidative dehydrogenation of butene and preparation method thereof
  • Catalyst for preparing butadiene through oxidative dehydrogenation of butene and preparation method thereof
  • Catalyst for preparing butadiene through oxidative dehydrogenation of butene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh an appropriate amount of iron oxide red, MgO, MgCl 2 and magnesium phosphate, pulverized and sieved to obtain a catalyst precursor with a volume average particle diameter of 41 μm and a D(0.97) (volume particle diameter) of 90 μm. Add appropriate amount of graphite and water to the above mixture, stir in a kneader for 2 hours, take out the extruded strand, and dry the obtained solid in an oven at 110° C. for 4 hours. The dried samples were calcined in a muffle furnace at 700°C for 6 hours, and ground into 40-60 mesh particles for catalyst evaluation. Catalyst 1 at 400 °C CO 2 Adsorption capacity is room temperature CO 2 47% of saturated adsorption capacity at 450°C CO 2 Adsorption capacity is room temperature CO 2 26% of saturated adsorption capacity at 500°C CO 2 Adsorption capacity is room temperature CO 2 13% of the saturated adsorption capacity. The elemental composition of Catalyst 1 has a molar ratio of MgFe 2 o 4 .Fe 0.2 P 0.05 Cl 0.01 o x .

Embodiment 2

[0042] Weigh appropriate amount of iron oxide yellow, MgO, MgCl 2 and magnesium phosphate, pulverized and sieved to obtain a catalyst precursor with a volume average particle diameter of 45 μm and a D(0.97) (volume particle diameter) of 98 μm. The above mixture was added with an appropriate amount of kale powder and water, stirred in a kneader for 1 hour, taken out to extrude, and dried in an oven at 90°C for 24 hours. The dried samples were calcined at 460° C. for 24 hours in a muffle furnace, and ground into 40-60 mesh particles for catalyst evaluation. Catalyst 2 at 400 °C in CO 2 Adsorption capacity is room temperature CO 2 49% of saturated adsorption capacity at 450°C CO 2 Adsorption capacity is room temperature CO 2 28% of saturated adsorption capacity at 500°C CO 2 Adsorption capacity is room temperature CO 2 15% of the saturated adsorption capacity. The molar ratio of the element composition of catalyst 2 is MgFe 2 o 4 .Fe 0.02 P 0.05 Cl 0.01 o x .

Embodiment 3

[0044] Weigh an appropriate amount of iron oxide yellow, Mg(OH) 2 , MgCl 2 and magnesium phosphate, pulverized and sieved to obtain a catalyst precursor with a volume average particle diameter of 39 μm and a D(0.97) (volume particle diameter) of 85 μm. Add appropriate amount of polystyrene microspheres and water to the above mixture, stir in a kneader for 10 hours, take out and extrude, and dry the obtained solid in an oven at 150° C. for 1 hour. The dried samples were calcined at 850° C. for 1 hour in a muffle furnace, and ground into 40-60 mesh particles for catalyst evaluation. Catalyst 3 at 400 °C CO 2 Adsorption capacity is room temperature CO 2 48% of saturated adsorption capacity at 450°C CO 2 Adsorption capacity is room temperature CO 2 27% of saturated adsorption capacity at 500°C CO 2 Adsorption capacity is room temperature CO 2 14% of the saturated adsorption capacity. The molar ratio of the element composition of catalyst 3 is MgFe 2 o 4 .Fe 0.05 P 0.05...

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Abstract

The invention relates to a catalyst for preparing butadiene by oxidative dehydrogenation of butene and a method thereof, and mainly solves the problem of low butadiene selectivity in the existing technology for preparing butadiene by oxidative dehydrogenation of butene. The catalyst for preparing butadiene through oxidative dehydrogenation of butene comprises MIIFe2O4 as a main active component, Mis at least one of Zn, Mg, Co and Mn; the catalyst also comprises a compound with a structural formula of AaBbCcOx as an auxiliary agent, the compound and MIIFe2O4 form the catalyst with a chemical formula of MIIFe2O4.AaBbCcOx according to a molar ratio, A is selected from Fe, B is selected from P and C is at least one of halogen elements, so that the problem is well solved, the butadiene productis efficiently prepared, and the catalyst can be used for industrial production of butadiene by oxidative dehydrogenation of butene.

Description

technical field [0001] The invention relates to a catalyst for preparing butadiene by oxidative dehydrogenation of butene and a preparation method thereof. Background technique [0002] 1,3-Butadiene is an important monomer of chemical products such as synthetic rubber and resin, and plays an important role in petrochemical olefin raw materials. The industrial production methods of butadiene mainly include steam cracking to ethylene co-production C4 extraction separation and butene dehydrogenation. It is economically advantageous to obtain butadiene by C4 extraction. At present, most of the world's butadiene production capacity adopts cracking C4 extraction process. However, butadiene is obtained as a by-product of the cracking unit, and it is difficult to increase its production by adding cracking units. Moreover, with the lightening of refining raw materials, butadiene production will decrease, resulting in continued tightness in global butadiene supply. [0003] With t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J27/187C07C11/167C07C5/333
CPCB01J27/1853B01J27/187C07C5/333C07C2527/185C07C2527/187C07C11/167
Inventor 曾铁强缪长喜吴文海樊志贵姜冬宇
Owner CHINA PETROLEUM & CHEM CORP
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