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Nano-microscale reaction separation coupled multifunctional catalyst and preparation method thereof

A reaction separation coupling, catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as the reduction of n-butane conversion rate, achieve selectivity and improve catalytic performance, avoid pollution, The effect of improving stability

Active Publication Date: 2016-08-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhong et al. (Zhong Y J, Chen L, Luo M F, Xie Y L, Zhu W D. Chem Commun, 2006, 2911-2912) coated 4A molecular sieve membranes on Pt / γ-Al2O3 catalyst particles with an average particle size of 1.5mm, It is used for the selective oxidation of n-butane and CO, and the conversion of n-butane is significantly reduced due to the molecular sieving effect of 4A molecular sieve

Method used

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  • Nano-microscale reaction separation coupled multifunctional catalyst and preparation method thereof
  • Nano-microscale reaction separation coupled multifunctional catalyst and preparation method thereof
  • Nano-microscale reaction separation coupled multifunctional catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] At room temperature, 10ml of 5wt% nickel nitrate aqueous solution was impregnated in 2g of SiO 2 on, let it stand for 30min; the impregnated SiO 2 Dry in an oven at 60°C for 2h, and then bake in a muffle furnace at 500°C for 2h; the cooled SiO 2 Put it in 10ml 1wt% KOH solution, put it into a hydrothermal reaction kettle, and treat it in an oven at 60°C for 2h; the cooled SiO 2 Soak in 6wt% polymethacrylate aqueous solution for 2h, then wash with dilute ammonia for 3 times, and dry in an oven at 60°C for 2h; the treated SiO 2 Placed in a seed solution containing 15wt% of Silicalite-1 with a scale of 50-100nm, after adsorption for 3 hours, washed with deionized water for 3 times, and then placed in a 60°C oven for 2h, in a muffle furnace at 500°C Roasting 2h; After roasting, the composition is placed in (TPAOH:TEOS:H 2 (O=1:30:4500) solution, placed in a crystallization kettle and reacted at 100°C for 8h to obtain the product, washed 5 times with deionized water, then...

Embodiment 2

[0036] At room temperature, 10ml of 0.1wt% chloroplatinic acid aqueous solution was impregnated in 2g of Al by vacuum impregnation method. 2 o 3 on, let it stand for 30min; the impregnated Al 2 o 3 Put it in an oven at 60°C for 2 hours, then put it in a muffle furnace and bake it at 500°C for 2 hours; put the cooled Al2O3 in 10ml of 1wt% NaOH solution, put it in a hydrothermal reaction kettle, and treat it in an oven at 60°C for 2 hours ; the cooled Al 2 o 3 Soak in 2.4wt% diethylene glycol diacrylate phthalate aqueous solution for 2 hours, then wash with dilute ammonia for 3 times, and dry in an oven at 60°C for 2 hours; the treated Al 2 o 3 Placed in a solution containing 15wt% ZSM-5 seed crystals, adsorbed for 3 hours, washed 3 times with deionized water, then placed in a 60°C oven for 2h, and roasted at 500°C in a muffle furnace for 2h; The product is placed in the composition (NaOH: TPAOH: TEOS: H 2 O: Al 2 (SO 4 ) 3 =1:15:60:5500:2), put it in a crystallization...

Embodiment 3

[0038] At room temperature, 10ml of 0.2wt% palladium chloride and 0.05wt% chloroplatinic acid aqueous solution was impregnated on 2g Y-type molecular sieves by conventional impregnation method, and left to stand for 30min; the impregnated molecular sieves were dried in an oven at 60°C for 2h, Place in a muffle furnace and roast at 500°C for 2h; put the cooled molecular sieve in 10ml 1wt% tetrapropylammonium hydroxide solution, put it in a hydrothermal reaction kettle, and treat it in an oven at 60°C for 2h; put the cooled molecular sieve Molecular sieves were soaked in 0.8wt% diethylene glycol diacrylate phthalate aqueous solution for 2 hours, then washed 3 times with dilute ammonia water, and dried in an oven at 60°C for 2 hours; the treated molecular sieves were placed in 30wt% Silicalite In the solution of -1 seed crystal, after adsorption for 2h, wash with deionized water 3 times, then place it in a 60°C oven for 2h, and then roast it in a muffle furnace at 500°C for 2h; th...

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Abstract

The invention relates to a multifunctional catalyst having a nano / micro-scale reaction and separation coupling function. The multifunctional catalyst comprises a core carrier containing a catalytic hydrogenation active component, wherein a molecular sieve shell layer having shape selection or isomerization capability is formed on the core carrier; the molecular sieve shell layer is one or two of ZSM-5, Silicalite-1 or a mordenite type molecular sieve; the molecular sieve shell layer is of a cylindrical staggered intergrowth structure; and the staggered intergrowth structure grows vertically to the outer surface of the core carrier. Through adoption of the catalyst disclosed by the invention, nano / micro-scale reaction and separation coupling can be realized; the process flow of a current hydroisomerization reaction is improved; the operation cost is reduced; the production efficiency is increased, and efficient coupling of reaction and separation processes is realized. The catalyst can be applied to various hydrogenation and isomerization processes.

Description

technical field [0001] The present invention relates to the technical field of petrochemical industry, more specifically, the present invention relates to a kind of method for separating and producing p-xylene. Background technique [0002] The core-shell material is generally composed of two parts: the central nucleating material and the outer shell. The core and the shell are composed of two different substances connected to each other through physical or chemical interactions. The two parts of the core and shell materials can be polymers, inorganic substances, and metals. The shell material coated on the outside of the nucleating material can change the charge on the surface of the nucleating material and then change the surface properties of the nucleating material, thereby endowing the particles with optical, electrical, magnetic, catalytic and other functions, or by changing the charge on the surface of the nucleating material. The permeability of the surface improves...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/035B01J29/44B01J29/80C07C13/18C07C5/10
Inventor 柴永明郭海玲吴仪岚段斐刘杜鹏刘宾刘晨光
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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