A kind of relatively stable propane dehydrogenation propylene catalyst and preparation method thereof

A catalyst and stability technology, applied in the field of propane catalytic dehydrogenation to propylene catalyst and its preparation, can solve the problems of deactivation, easy carbon deposition of the catalyst, etc., and achieve the effects of long service life, easy implementation and improved stability

Inactive Publication Date: 2018-03-30
NANKAI UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In short, the catalytic dehydrogenation of propane to propylene will play an increasingly important role in solving the problem of unbalanced supply and demand of propylene, but its defects are also obvious. High-temperature reactions cause the catalyst to be prone to carbon deposition, deactivation, etc., and further research and development is required to stabilize the properties. , a catalyst with high activity and high conversion

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
  • A kind of relatively stable propane dehydrogenation propylene catalyst and preparation method thereof
  • A kind of relatively stable propane dehydrogenation propylene catalyst and preparation method thereof
  • A kind of relatively stable propane dehydrogenation propylene catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]A relatively stable catalyst for the catalytic dehydrogenation of propane to propylene, using the composite oxide alumina-chromium oxide as the composite support, metal Pt as the active component, and metal Sn and Y as additives, through continuous impregnation method Add metal ions Pt, Sn and Y, whose chemical formula is Pt-Sn-Y / Cr 2 o 3 ·Al 2 o 3 , Cr in composite carrier 2 o 3 with Al 2 o 3 The mass ratio of the catalyst is 2:1, and the mass percentage of each component in the catalyst is: Pt 0.4%, Sn 0.6%, Y 1.1%; its preparation method, the steps are as follows:

[0029] 1) Preparation of mixed carrier by co-precipitation method

[0030] 7.8953g Al(NO 3 ) 3 9H 2 O and 5.5188g Cr(NO 3 ) 3 9H 2 O was added to 150mL deionized water, stirred and dissolved, then ultrasonicated for 15min, and while stirring, ammonia water with a concentration of 28wt% was added dropwise to a pH value of 5.1, the precipitate was separated and washed twice with absolute ethanol...

Embodiment 2

[0036] A relatively stable catalyst for the catalytic dehydrogenation of propane to propylene, using the composite oxide alumina-chromia as the composite support, metal Pt as the active component, and metal Sn, La and Y as additives, through continuous Metal ions Pt, Sn and Y are added by impregnation method, and its chemical formula is Pt-Sn-La-Y / Cr 2 o 3 ·Al 2 o 3 , Cr in composite carrier 2 o 3 with Al 2 o 3 The mass ratio of the catalyst is 2:1, and the mass percentage of each component in the catalyst is: Pt0.4%, Sn 0.6%, La 1.1%, Y 0.5%; its preparation method, the steps are as follows:

[0037] 1), 2) are identical with embodiment 1;

[0038] 3)Pt-Sn-La-Y / Cr 2 o 3 ·Al 2 o 3 preparation of

[0039] In the above 1.5g Pt-Sn / Cr 2 o 3 ·Al 2 o 3 In, add 3.35mL La(NO 3 ) 3 ·6H 2 O aqueous solution was stirred for 12 h, dried and calcined at 550 °C for 4 h to obtain Pt-Sn-La / Cr 2 o 3 ·Al 2 o 3 , and then add 0.45mL of Y(NO 3 ) 3 The aqueous solution was...

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

No PUM Login to view more

Abstract

A relatively stable catalyst for propane catalytic dehydrogenation to propylene, with composite oxide alumina-chromium oxide as composite support, metal Pt as active component, metal Sn, La and Y as additives, and its chemical formula is Pt ‑Sn‑La‑Y / Cr2O3·Al2O3, the mass ratio of Cr2O3 and Al2O3 in the composite carrier is 2:1, the loading amount of the promoter in the catalyst: Pt is 0.2‑1.0wt%, Sn is 0.4‑1.5wt%, La is 0-1.4 wt%, and Y is 0.2-1.2 wt%. The invention has the advantages that: the preparation method is simple in process and easy to implement, the prepared catalyst has higher propane conversion rate, higher activity and longer service life, and the stability of the catalyst is obviously improved; the selectivity of propylene is higher, The catalyst has a small deactivation coefficient, has significant economic and technical effects, and is beneficial to industrial promotion.

Description

technical field [0001] The invention relates to a preparation technology for propane dehydrogenation to propylene, in particular to a relatively stable catalyst for propane catalytic dehydrogenation to propylene and a preparation method thereof. Background technique [0002] As an important chemical raw material, propylene is widely used in the production of polypropylene, acrylic acid and butanol and octanol. However, propylene supply growth has lagged behind demand growth, with propylene production accounting for only about 70% of equivalent demand. In 2007, my country's annual output of propane was 8.166 million tons. In 2013, the output increased to 20.28 million tons, a 1.5-fold increase. Even so, the supply and demand of propylene is still in short supply. Traditional propylene production technologies such as catalytic cracking and ethylene co-production have been difficult to meet the imbalance between supply and demand of propylene, and the development and applicati...

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 Patents(China)
IPC IPC(8): B01J23/652B01J23/63B01J32/00C07C5/333C07C11/06
CPCY02P20/52
Inventor 吴世华赵鹏关允飞张守民王彦美郭先芝
Owner NANKAI UNIV
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