Supercharge Your Innovation With Domain-Expert AI Agents!

Modified alumina carrier as well as preparation method and application thereof

A technology of alumina carrier and modification, applied in catalyst carrier, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc., can solve phase change, low crushing strength, single surface acidity and alkalinity etc. to achieve good strength, avoid acid cracking, and good dispersion

Pending Publication Date: 2021-12-07
REZEL CATALYSTS CORP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems that the surface of the existing alumina carrier has single acidity and alkalinity, the crushing strength is still low, and phase transition is prone to occur at high temperature. The present invention provides a modified alumina carrier and its preparation method and application

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified alumina carrier as well as preparation method and application thereof
  • Modified alumina carrier as well as preparation method and application thereof
  • Modified alumina carrier as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] θ-Al 2 o 3 Preparation of vector

[0024] Firstly, 5 g of methylcellulose and 700 g of deionized water were mixed, stirred at room temperature for two hours, left to stand for 12 hours, and then 15 g of 3 mol / L nitric acid was added to obtain a kneaded gel. Add 120g of pseudo-boehmite powder, 5g of fennel powder, and 120g of kneading glue into the kneader, mix the above components evenly, and obtain powder after grinding, sieve with a 180-mesh sampling sieve, and sieve 45wt% of the The obtained powder is fed into the shaper to form a ball by rolling to make a cue ball. Then add the rest of the sieved powder to the shaping machine to make the cue ball shape and grow up, screen out the qualified balls with a diameter of 1.6-2.0mm, then dry the qualified balls at 110°C for 2 hours, and then bake them at 950°C Four hours, get θ-Al 2 o 3 Carrier; θ-Al 2 o 3 Carrier performance indicators are shown in Table 1.

[0025] θ-Al 2 o 3 carrier modification

[0026] Confi...

Embodiment 2

[0032] Modification of alumina

[0033] The θ-Al that makes in 30g embodiment 1 2 o 3 The carrier was mixed with 50 g of 5 mol / L lanthanum nitrate solution and then put into a reaction kettle. After hydrothermal reaction at 120° C. for 30 h, the sample was taken out and filtered. Put the filtered solid sample into an oven, dry it at 110°C for 8 hours, put the sample into a muffle furnace and bake it at 600°C for 5 hours to obtain the modified θ-Al 2 o 3 Carrier B. Modified θ-Al 2 o 3 The performance index of carrier B is shown in Table 2.

[0034] Preparation of dehydrogenation catalyst

[0035] 0.042g (NH 4 ) 2 PtCl6 , 0.05g SnCl 2 2H 2 O and 2.25g YCl 3 , 0.25g KCl was dissolved in 25g water to obtain an impregnation solution, and the impregnation solution was mixed with 10g modified θ-Al 2 o 3 Carrier B was mixed, put into a rotary evaporator, and stirred at room temperature under vacuum for 2 hours, then turned on the heating, and evaporated the solvent water...

Embodiment 3

[0039] Modification of alumina support

[0040] The θ-Al that makes in 25g embodiment 1 2 o 3 The carrier was mixed with 40 g of 5 mol / L ammonium titanyl oxalate solution, then put into a reaction kettle, subjected to hydrothermal reaction at 120° C. for 30 h, taken out, and filtered. The filtered sample was put into an oven and dried at 110°C for 8h. Put the dried sample into a muffle furnace, bake at 600°C for 5h, and take out the sample. Get modified θ-Al 2 o 3 Carrier C. Modified θ-Al 2 o 3 The performance index of carrier C is shown in Table 2.

[0041] Preparation of dehydrogenation catalyst

[0042] 0.042g (NH 4 ) 2 PtCl 6 , 0.05g SnCl 2 2H 2 O and 2.25g YCl 3 , 0.25g of KCl was dissolved in 5g of water to obtain an impregnation solution. Put the impregnation solution in a beaker, put 10g modified θ-Al 2 o 3 The carrier C is added into the impregnating liquid, and stirred evenly to obtain a solid product. After aging at room temperature for 5 hours, i...

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
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a modified alumina carrier and a preparation method and application thereof. The modified alumina carrier is mainly obtained by modifying theta-Al2O3 through a rare earth element through a hydrothermal reaction, wherein the rare earth element is at least one of yttrium, lanthanum, zirconium and titanium; the content of rare earth elements in the modified alumina carrier is 1-15 wt%; and the BET specific surface area of the modified alumina carrier is 50-200 m<2> / g, and the aperture is 5-50nm. Part of the rare earth elements are loaded on the pore surfaces of the theta-Al2O3 carrier, and the rest of the rare earth elements are located in the skeleton of the theta-Al2O3 carrier, so that the strength of the theta-Al2O3 carrier is improved. When the catalyst prepared on the basis of the modified alumina carrier is applied to a dehydrogenation reaction, in particular to a reaction for preparing propylene through propane dehydrogenation, the strength of the catalyst prepared from the alumina carrier can be obviously improved while the high propylene yield can be ensured, so that the economic benefit of preparing propylene through propane dehydrogenation is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a modified alumina carrier and its preparation method and application. Background technique [0002] In recent years, due to the continuous development of the chemical industry, the demand for chemicals such as acrylonitrile and polypropylene has grown rapidly around the world. Propylene is used as a raw material for the production of chemicals such as acrylonitrile, and its demand has also increased. The methods for producing propylene mainly include coal-to-olefins, catalytic cracking and catalytic dehydrogenation. However, the cost of coal-to-olefins is high and the yield is low, while catalytic cracking has disadvantages such as low yield and high energy consumption, and due to the shortage of non-renewable resources such as petroleum, the method of preparing low-carbon olefins by catalytic cracking is no longer With efficient economic benefits. Therefore, th...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J23/10B01J21/06B01J23/63B01J35/10C07C5/333C07C11/06
CPCB01J23/10B01J21/063B01J21/066B01J23/63C07C5/3332B01J23/002B01J2523/00C07C2523/63B01J35/613B01J35/615B01J35/635B01J35/647C07C11/06B01J2523/13B01J2523/31B01J2523/43B01J2523/36B01J2523/828B01J2523/3706B01J2523/47B01J2523/48Y02P20/52
Inventor 兰兴玥卓润生孙秋实刘兵肖可王钦周立旻刘新生
Owner REZEL CATALYSTS CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com