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Highly-dispersed supported slurry bed hydrogenation bead catalyst and preparation method thereof

A granular catalyst and supported technology, which is applied in the field of high-dispersion loaded slurry bed hydrogenation granular catalyst and its preparation, can solve the problems of desorption of unfavorable reaction products, so as to facilitate hydrogen overflow, avoid shiny production, The effect of improving hydrogenation activity

Inactive Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acidity of the catalyst carrier is too high, which is not conducive to the desorption of the reaction product, and is prone to excessive hydrogenation to form by-products

Method used

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  • Highly-dispersed supported slurry bed hydrogenation bead catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1-1 Weigh 50 g of microspherical silica particles with an average particle size of 60 μm, add it to a hydrochloric acid solution with a concentration of 1 wt % at a temperature of 50 °C, fully immerse it for 10 hours, then take it out and dry it at a temperature of 120 °C to obtain a catalyst carrier A. use;

[0046] 1-2 Take 10g of X-type molecular sieve, 4g of zirconium nitrate, 30g of aluminum sol (40wt%), 5g of silica sol (30wt%), and 1g of ethanol and mix them in a 100ml ball mill. 2 hours to obtain mixed slurry B;

[0047] 1-3 Using the dipping method, the slurry B is evenly loaded on the carrier A, the dipping time is 30 minutes, and the carrier C of the hydrogenation catalyst is obtained after drying at 80 ° C and calcining at 500 ° C for 10 hours; 3.4% of silica particles;

[0048] 1-4 Take 30ml of H with a concentration of 20mg / ml 2 PdCl 4 The precious metal solution is impregnated on the catalyst carrier, and after being evenly impregnated, the solution i...

Embodiment 2

[0051] 2-1 Weigh 50 g of microspherical silica particles with an average particle size of 50 μm, add it to a NaOH solution with a concentration of 1 wt% at a temperature of 40 °C, soak it for 2 hours, and then take it out and dry it at a temperature of 120 °C to obtain a catalyst carrier A, which is ready for use ;

[0052] 2-2 Mix 5g of Y-type molecular sieve, 43g of silica sol (30wt%), and 2g of methanol in a 100ml ball mill, adjust the rotation speed of the ball mill to 500r / min, and mill it for 2 hours to obtain mixed slurry B;

[0053] 2-3 The slurry B was evenly loaded on the carrier A by the dipping method, and the dipping time was 30 min. After drying at 80°C and calcining at 500°C for 10 hours, the carrier C of the hydrogenation catalyst was obtained; the measured coating mass accounted for microns 1.8% of silica particles;

[0054] 2-4 Take 30ml of Pd(NO) with a concentration of 20mg / ml 3 ) 2 The precious metal solution is impregnated on the catalyst carrier, and ...

Embodiment 3

[0057] 3-1 The preparation of the catalyst carrier is the same as that of Example 2, and the catalyst carrier A is obtained for use;

[0058] 3-2 Mix 15g of ZSM-5 molecular sieve, 25g of aluminum sol (40wt%), 8g of silica sol (30wt%), and 2g of ethanol in a 100ml ball mill, adjust the speed of the ball mill to 500r / min, and mill the ball for 2 hours , to obtain mixed slurry B;

[0059]3-3 The slurry B was evenly loaded on the carrier A by the dipping method. The dipping time was 30 min. After drying at 80°C and calcining at 500°C for 10 hours, the carrier C of the hydrogenation catalyst was obtained; 5.6% of silica particles;

[0060] 3-4 Take 30ml of Pd(NO) with a concentration of 20mg / ml 3 ) 2 The precious metal solution is impregnated on the catalyst carrier, and after being evenly impregnated, the solution is placed in a microwave oven for rapid drying, and then placed in a muffle furnace for calcination at 500° C. for 8 hours to obtain a hydrogenation catalyst in an ox...

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Abstract

The invention discloses a highly-dispersed supported slurry bed hydrogenation bead catalyst and a preparation method thereof, and belongs to the technical field of chemical industry. The catalyst is adopts one or a mixture of two of noble metals Pd and Pt as a main active component, the main active component is loaded on an oxide-molecular sieve composite carrier having a core-shell structure, thecore is an inert micro-spherical oxide, and the shell is a mixed carrier formed by compounding an oxide and molecular sieve. The hydrogenation catalyst disclosed in the makes the thickness of the active component on the very thin shell controllable, the shell has a microporous-mesoporous hierarchical porous structure, the micro-porous structure increases the dispersion degree of the active component, and the meso-porous structure provides diffusion channels for reactants and products. The catalyst disclosed in the invention has significantly improved selectivity and activity in anthraquinonehydrogenation for preparing hydrogen peroxide; and compared with industrial catalysts, the catalyst in the invention allows the space time yield of hydrogen peroxide to reach 7-15 kg H2O2 (100%) gPd<-1>.d<-1> and be far higher than industrial data, and has high wear resistance and high stability.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a highly dispersed supported slurry bed hydrogenation particle catalyst and a preparation method thereof. Background technique [0002] H 2 O 2 As a clean chemical energy product, as oxidant, bleach, disinfectant, deoxidizer, polymer initiator and cross-linking agent, it is used in papermaking, chemical industry, environmental protection, electronics, aerospace, food processing, medicine, cosmetics, metallurgy, etc. industry. H 2 O 2 It has strong oxidizing property in the whole pH range, and the atomic mass of available active oxygen accounts for 47.1% of its molecular mass, which is much higher than that of other common industrial oxidants. In wastewater treatment and pulp bleaching processes, the use of hydrogen peroxide can reduce the use of hydrogen peroxide. Chlorine as a bactericide and disinfectant brings a large amount of secondary pollutants s...

Claims

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Application Information

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IPC IPC(8): B01J29/12B01J29/44B01J35/10C01B15/023
Inventor 王树东苏宏久杨晓野李大卫
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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