Spherical alumina carrier and preparation method and application thereof

A spherical alumina and carrier technology, applied in catalyst carriers, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of large pore volume and high strength, and achieve the advantages of reducing wear, improving mechanical strength and improving wear resistance. Effect

Active Publication Date: 2019-11-05
SOUTHWEST RES & DESIGN INST OF CHEM IND
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the oil ammonia column forming method is that the product has a large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 100g of macroporous pseudoboehmite with a pore volume of 0.90ml / g and a particle size of <15μm, add 300g of water, stir evenly, add 1.6g of glucomannan, stir evenly, then add 15ml of concentrated nitric acid to acidify into a sol, The average particle diameter of the sol is 45nm, and the solid content in the sol is 18%.

[0030] The sol was dropped into the oil ammonia column device, molded, and aged for 2 hours.

[0031] The gel balls were taken out and rinsed twice with deionized water, dried at 80°C for 8 hours in an atmosphere with a water vapor to air volume ratio of 75:25, and then calcined at 800°C for 6 hours to obtain the spherical alumina carrier of this example.

[0032] The height of the oil phase of the oil ammonia column device is 20cm, and the height of the water phase is 5cm; the oil phase is petroleum ether, and the water phase is an ammonia solution containing ethylene glycol and ammonium nitrate, the concentration of ethylene glycol is 5g / L, and ...

Embodiment 2

[0035] Take 100g of macroporous pseudoboehmite with a pore volume of 0.95ml / g and a particle size of <15μm, add 350g of water, stir well, add 1.9g of galactomannan, stir well, then add 18ml of concentrated nitric acid to acidify into a sol , the average particle size of the sol is 38nm, and the solid content in the sol is 15%.

[0036] The sol was dropped into the oil ammonia column device, molded, and aged for 1 hour.

[0037] The gel balls were taken out and rinsed twice with deionized water, dried at 100°C for 4 hours in an atmosphere with a water vapor to air volume ratio of 50:50, and then calcined at 600°C for 10 hours to obtain the spherical alumina carrier of this example.

[0038] The height of the oil phase of the oil ammonia column device is 18cm, and the height of the water phase is 10cm; the oil phase is mineral oil, and the water phase is ammonia solution containing diethylene glycol and ammonium nitrate, and the concentration of diethylene glycol is 3.8g / L , th...

Embodiment 3

[0041] Take 100g of macroporous pseudoboehmite with a pore volume of 1.00ml / g and a particle size of <15μm, add 380g of water, stir well, add 0.4g glucomannan and 0.8g urea, stir well, then add 10g concentrated nitric acid and 12g of formic acid to form a sol, the average particle size of the sol is 29nm, and the solid content in the sol is 13%.

[0042] The sol was dropped into the oil ammonia column device, molded, and aged for 2 hours.

[0043] The gel balls were taken out and rinsed with deionized water, dried at 90°C for 7 hours in an atmosphere with a water vapor to air volume ratio of 65:35, and then calcined at 900°C for 5 hours to obtain the spherical alumina carrier of this example.

[0044] The height of the oil phase of the oil ammonia column device is 15cm, and the height of the water phase is 15cm; the oil phase is toluene, the water phase is an ammonia solution containing glycerin and ammonium nitrate, the concentration of glycerin is 2g / L, the concentration of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Pore volumeaaaaaaaaaa
Login to view more

Abstract

The invention provides a preparation method of a spherical alumina carrier, and belongs to the technical field of catalysts. The preparation method comprises the steps that 1) pseudo-boehmite is addedinto water, and after a gelatinizing agent is added, the pseudo-boehmite is acidized into sol; 2) the sol is dropped into an oil ammonia column device, formed and aged; 3) aged gel balls are flushedwith deionized water, dried and roasted to obtain the spherical alumina carrier. The preparation method of the spherical alumina carrier has the advantages that the large-pore-volume pseudo-boehmite is used for gelatinization, and the particle diameters of sol particles are controlled, so that the sol is more compact after being gelatinized in an ammonium hydroxide phase, and the mechanical strength of the alumina carrier is improved. The gel balls are dried in the air containing water vapor so that the abrasive resistance of the finished alumina carrier product can be improved, and the abrasion is reduced; the appropriate gelatinizing agent is added, and ammonium nitrate and alcohol are added into the ammonium hydroxide phase, so that sol globules are rapidly gelatinized and solidified inthe ammonium hydroxide phase, the height of an ammonium hydroxide layer is reduced, and the use amount of ammonium hydroxide is reduced.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a spherical alumina carrier and its preparation method and application. Background technique [0002] The carrier is an important part of the catalyst. An ideal catalyst carrier should meet the following conditions: 1) have a certain shape that can adapt to the reaction process, 2) have sufficient mechanical strength to withstand the mechanical and thermal shocks in the reaction process, and have Sufficient tensile strength to resist the cracking of the dirt gradually deposited in the pores during the use of the catalyst, 3) sufficient specific surface area and pore structure so that the active components can be evenly loaded on the surface, 4) It has sufficient stability to resist the erosion of active components, reactants and reaction products, and can withstand the regeneration treatment of the catalyst. 5) The thermal conductivity, specific heat and specific gravity are su...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J32/00B01J21/04B01J35/08B01J37/03B01J8/08
CPCB01J32/00B01J8/08B01J21/04B01J35/08B01J37/036
Inventor 梁衡韩伟潘相米艾珍吴砚会程牧曦李博郑敏王华
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap