Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Catalyst with dehydrogenation function, preparation method and application thereof, and method for generating low-carbon olefin by dehydrogenation of low-carbon alkane

A technology of low-carbon alkanes and catalysts, which is applied in the field of catalysts to achieve high stability, reduce the possibility of excessive dehydrogenation, and improve surface properties

Pending Publication Date: 2021-12-31
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the diffusion limitation caused by the small pores of all-silicon molecular sieves, the occurrence of carbon deposition is still promoted. Therefore, it is urgent to further reduce the carbon deposition rate of microporous (all-silicon) molecular sieves, so as to improve the single-pass catalytic life of the catalyst, so that it can adapt to Large-scale industrial production requires

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
  • Catalyst with dehydrogenation function, preparation method and application thereof, and method for generating low-carbon olefin by dehydrogenation of low-carbon alkane
  • Catalyst with dehydrogenation function, preparation method and application thereof, and method for generating low-carbon olefin by dehydrogenation of low-carbon alkane
  • Catalyst with dehydrogenation function, preparation method and application thereof, and method for generating low-carbon olefin by dehydrogenation of low-carbon alkane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] (1) Select chloroplatinic acid and ZnNO respectively 3 , Ca(NO 3 ) 2 It is the active component precursor and auxiliary agent precursor. Adopt equal-volume impregnation method and vacuum rotary steaming method to load Pt, Zn and Ca on the all-silicon molecular sieve according to the proportions of 0.5 wt%, 0.8 wt% and 0.4 wt% of the carrier weight. Then the product was dried at 120°C for 2h, and then calcined at 580°C for 2h. Broken to 40-60 mesh.

[0071] (2) Mix the product obtained in step (1) with toluene at a mass ratio of 1:6, and heat to reflux at 55°C for 24h. After washing the heated reflux product twice with toluene, it was vacuum-dried at 50° C. and 97 kPa vacuum for 24 hours. A surface-functionalized catalyst A1 was obtained. Its scanning electron microscope picture is as figure 1 shown. Transmission electron microscope picture as figure 2 As shown, it can be seen from the figure that the average particle size is 250nm, and the average particle siz...

Embodiment 2

[0073] (1) Select chloroplatinic acid and ZnNO respectively 3 , Ca(NO 3 ) 2 It is the active component precursor and auxiliary agent precursor. Adopt equal-volume impregnation method and vacuum rotary steaming method to load Pt, Zn and Ca on the all-silicon molecular sieve according to the proportions of 0.5 wt%, 0.8 wt% and 0.4 wt% of the carrier weight. Then the product was dried at 120°C for 2h, and then calcined at 600°C for 2h. Broken to 40-60 mesh.

[0074] (2) Mix the product obtained in step (1) with xylene at a mass ratio of 1:5, and heat to reflux at 55°C for 24h. After washing the heated reflux product twice with toluene, it was vacuum-dried at 60° C. and 97 kPa vacuum for 24 hours. Surface functionalized catalyst A2 was obtained.

Embodiment 3

[0076] (1) Select chloroplatinic acid and ZnNO respectively 3 , Ca(NO 3 ) 2 It is the active component precursor and auxiliary agent precursor. Adopt equal-volume impregnation method and vacuum rotary steaming method to load Pt, Zn and Ca on the all-silicon molecular sieve according to the proportions of 0.5 wt%, 0.8 wt% and 0.4 wt% of the carrier weight. Then the product was dried at 120°C for 2h, and then calcined at 580°C for 2h. Broken to 40-60 mesh.

[0077] (2) Mix the product obtained in step (1) with cyclohexane at a mass ratio of 1:8, and heat to reflux at 50°C for 24h. After washing the heated reflux product twice with toluene, it was vacuum-dried at 60° C. and 97 kPa vacuum for 24 hours. Surface functionalized catalyst A3 was obtained.

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The present invention relates to the field of catalysts, and discloses a catalyst with a dehydrogenation function. The catalyst comprises a carrier and an active component. The catalyst is characterized in that the carrier comprises a surface functionalized all-silicon molecular sieve with polar modification and / or hydrophobic modification on the surface, and the active component comprises a noble metal. The catalyst provided by the invention has the characteristics of long one-way catalysis life, high raw material conversion rate, high product selectivity and high stability, can effectively improve the production efficiency, can reduce the cost caused by frequent regeneration of the catalyst and matched production process and equipment, and is especially suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a surface-functionalized catalyst with dehydrogenation function, its preparation method and application, and a method for dehydrogenating low-carbon alkanes to generate low-carbon olefins. Background technique [0002] At present, commercial propane dehydrogenation to propylene catalysts generally use alumina as a carrier, which makes the catalyst less stable and has a shorter single-pass catalytic life. And thus caused the problem of frequent catalyst regeneration, increased production energy consumption and cost. At the same time, the existing fluidized bed process for alumina catalysts also has the problems of complex reaction devices and high construction costs. Therefore, there is an urgent need to find a new catalyst carrier with good stability, long catalytic life per pass, and simple supporting process for the preparation of propane dehydrogenation to propylene catalyst. [000...

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): B01J29/03B01J31/02B01J37/02C07C5/333C07C11/06
CPCB01J29/0325B01J37/0201B01J31/0274C07C5/333B01J2229/186B01J2229/34C07C2529/03B01J35/617B01J35/647B01J35/615C07C11/06Y02P20/52Y02P20/584
Inventor 冯英杰冯静刘东兵张明森
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com