Catalyst used for alkane catalytic dehydrogenation and preparation method thereof

A technology for alkane dehydrogenation and catalysts, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve catalyst loss, low heat transfer efficiency, and catalyst environment Hazards have no hiding places and other issues, achieving the effect of high selectivity and high single-pass conversion rate

Active Publication Date: 2015-05-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF8 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dehydrogenation reaction of alkanes is a strong endothermic reaction. In addition to the low heat transfer efficiency of the fixed bed reactor, frequent reaction and regeneration switching operations are not good for the stability of the entire reaction system, which is likely to bring safety hazards.
UOP's Oleflex technology uses a moving bed reactor. Although the continuous operation of the dehydrogenation reaction and the coke regeneration of the catalyst has been realized, the problem of poor heat transfer efficiency has not been solved.
The only FBD-4 technology that uses a circulating fluidized bed reactor has high heat transfer efficiency and can use the heat carried by the high-temperature rege

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 used for alkane catalytic dehydrogenation and preparation method thereof
  • Catalyst used for alkane catalytic dehydrogenation and preparation method thereof
  • Catalyst used for alkane catalytic dehydrogenation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 73.08g of zinc nitrate (Zn(NO 3) 2 ·6H 2 O), dissolved in 50g of deionized water, completely dissolved, impregnated in 80g of silicon oxide (SiO 2 ), dried at 120°C for 6-8h, and then fired at 600°C for 5h. The catalyst evaluation results showed that the conversion rate of isobutane was 66.05wt%, the yield of isobutene was 55.87wt%, and the selectivity of isobutene was 84.59wt%.

Embodiment 2

[0037] Add 338.03 g of deionized water to 84.5 g of pseudo-boehmite, stir well in a water bath at 70° C., add hydrochloric acid to form a gel, and adjust the pH value to about 3-4. Take by weighing the magnesium nitrate (Mg(NO) of 144.45g 3 ) 2 ·6H 2 O) Add to the prepared gel, then add 50g of deionized water, mechanically stir evenly, dry at 120°C for 6-8h, then roast at 700°C for 8h, cool, crush and sieve, take 80-180 mesh The particles are ready for use as a carrier. 72.52g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) dissolve in 50g deionized water and stir well. Co(NO) was impregnated on the prepared support 3 ) 2 Solution, dried at 140°C for 8-10h, then calcined at 700°C for 4h. The evaluation results of the catalyst showed that the conversion rate of isobutane was 41.91wt%, the yield of isobutene was 35.29wt%, and the selectivity of isobutene was 84.20wt%.

Embodiment 3

[0039] Add 338.03 g of deionized water to 84.5 g of pseudo-boehmite, stir well in a water bath at 70° C., add hydrochloric acid to form a gel, and adjust the pH value to about 3-4. Take by weighing the magnesium nitrate (Mg(NO) of 144.45g 3 ) 2 ·6H 2 O) Add to the prepared gel, then add 50g of deionized water, stir evenly, dry at 140°C for 6-8h, then roast at 700°C for 10h, cool and crush and sieve, take 80-180 mesh The particles are ready for use as a carrier. 73.08g zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) dissolve in 50g deionized water and stir well. Impregnated Zn(NO 3 ) 2 Solution, dried at 140°C for 6-8h, then calcined at 600°C for 5h. The evaluation results of the catalyst showed that the conversion rate of isobutane was 56.01wt%, the yield of isobutene was 49.30wt%, and the selectivity of isobutene was 88.02wt%.

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
Conversion rateaaaaaaaaaa
Yieldaaaaaaaaaa
Selectivityaaaaaaaaaa
Login to view more

Abstract

A catalyst for alkane dehydrogenation comprises a component A and a component B, wherein the component A is an oxide selected from one or more of La, Fe, Zn, Cu, Co or Ce, and the content of the component A in the catalyst accounts for 0.5 to 50 wt%, preferably 10-30 wt%; the component B is a mixed oxide or a composite oxide selected from one or more of SiO2, Al2O3, ZrO2, Ga2O3 and MgO, and the content of the component B in the catalyst accounts for 50 to 99.5 wt%, preferably 70-90 wt%. The catalyst provided by the invention has high alkane single-pass conversion and high selectivity of olefin, after repeated regeneration, the reactivity is very stable, and the catalyst is used in a circulating fluidized bed reaction device.

Description

technical field [0001] The invention relates to a dehydrogenation catalyst, in particular to an alkane dehydrogenation catalyst and a preparation method of the catalyst. Background technique [0002] With the expansion of refinery units and ethylene units, there will be more and more low-carbon alkanes to be further developed and utilized. As an effective way to rationally utilize low-value saturated alkanes to produce high-value-added corresponding alkenes, alkane dehydrogenation has attracted extensive attention of researchers in recent years. [0003] Catalytic dehydrogenation technology of alkanes has been applied industrially as early as decades ago, and there are only two kinds of catalysts used: supported noble metal Pt catalyst and Cr 2 o 3 catalyst. The use of Pt catalysts has high investment and operating costs; while Cr 2 o 3 The Cr produced by the catalyst during its preparation and use 6+ It is carcinogenic and will cause adverse effects on the human body ...

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): B01J23/06B01J23/75B01J23/825B01J23/10B01J23/745B01J23/72C07C5/333C07C11/09C07C11/06
CPCY02P20/52
Inventor 王国玮李春义
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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