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Core-shell molecular sieve coated catalyst and preparation method thereof

A molecular sieve and catalyst technology, which is applied in the field of core-shell molecular sieve-coated catalysts and their preparation, can solve problems such as the reduction of n-butane conversion rate, achieve the effects of improving selectivity and catalytic performance, improving stability, and avoiding pollution

Active Publication Date: 2016-06-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhong et al. (ZhongYJ, ChenL, LuoMF, XieYL, ZhuWD.ChemCommun, 2006, 2911-2912) coated 4A molecular sieve membranes on Pt / γ-Al2O3 catalyst particles with an average particle size of 1.5mm, and used them for n-butane and CO selective oxidation, the conversion of n-butane is significantly reduced due to the molecular sieving effect of 4A molecular sieve

Method used

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  • Core-shell molecular sieve coated catalyst and preparation method thereof
  • Core-shell molecular sieve coated catalyst and preparation method thereof
  • Core-shell molecular sieve coated catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] 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

[0035] At room temperature, 10ml of 0.1wt% chloroplatinic acid aqueous solution was impregnated in 2gAl 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 kett...

Embodiment 3

[0037] At room temperature, 10ml of 0.2wt% palladium chloride and 0.05wt% chloroplatinic acid aqueous solution was impregnated on 2g of Y-type molecular sieve by conventional impregnation method, and left to stand for 30min; Roast in a muffle furnace at 500°C for 2h; put the cooled molecular sieve in 10ml of 1wt% tetrapropylammonium hydroxide solution, put it into a hydrothermal reaction kettle, and treat it in an oven at 60°C for 2h; put the cooled molecular sieve in Soak in 0.8wt% diethylene glycol diacrylate phthalate aqueous solution for 2h, then wash 3 times with dilute ammonia water, and dry in an oven at 60°C for 2h; the treated molecular sieve is placed in 30wt% Silicalite-1 In the solution of seed crystals, after adsorption for 2h, wash with deionized water for 3 times, then place in a 60°C oven for 2h, and roast in a muffle furnace at 500°C for 2h; the product after roasting is placed in (TPAOH: TEOS:H2O=1:20:5500) solution, placed in a crystallization kettle and rea...

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Abstract

The invention relates to a method for preparing a core-shell molecular sieve-coated catalyst. The catalyst includes an inner core carrier containing catalytic hydrogenation active components, and a shape-selective or isomerizing compound formed on the inner core carrier. A molecular sieve shell; the preparation method includes the steps of etching the inner core carrier containing the catalytic hydrogenation active component with an alkaline solution and soaking in a surfactant; and forming a molecular sieve shell on the above-mentioned treated inner core carrier step. The catalyst obtained by the preparation method of the present invention can realize separation and coupling of reactions on the nano-micro scale, can be used in various hydrogenation and isomerization reaction processes, improves the existing hydroisomerization reaction process flow, and reduces operating costs , improve production efficiency, and realize efficient coupling of reaction separation processes; and the catalyst can provide theoretical guidance and technical basis for the development of reaction separation processes with independent intellectual property rights.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, more specifically, the invention relates to a core-shell molecular sieve-coated catalyst and a preparation method thereof. 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 i...

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 柴永明吴仪岚刘杜鹏郭海玲刘宾刘晨光
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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