Propane dehydrogenation catalyst and preparation method thereof

A technology for propane dehydrogenation and catalyst, applied in catalyst activation/preparation, catalyst, carbon compound catalyst, etc. Utilization and other issues, to achieve the effect of improving the effective utilization rate, improving the processing capacity of the device, and improving the activity and selectivity

Active Publication Date: 2018-10-16
洛阳市科创石化科技开发有限公司
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's propylene mainly comes from co-production or by-products of naphtha cracking and catalytic cracking processes. However, with the increase in propylene consumption year by year, the traditional propylene production can no longer meet the demand. Therefore, the technology of propane dehydrogenation to propylene is developing rapidly. Become the third largest source of propylene after methanol to olefins
[0003] For chromium-based propane dehydrogenation catalysts, since the prior art mostly uses the impregnation method to load the active components on the alumina carrier, this method affects the loading and dispersion of the active components on the alumina carrier, reducing the active component. The effective utilization rate of the catalyst affects the reactivity and selectivity of t

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
  • Propane dehydrogenation catalyst and preparation method thereof
  • Propane dehydrogenation catalyst and preparation method thereof
  • Propane dehydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 1579 grams of Cr(NO 3 ) 3 9H 2 O was dissolved in deionized water, added 2000 grams of silica sol and stirred evenly, continued to stir and slowly added 250 grams of 10% sodium hydroxide solution, and 300 grams of 10% hexamethylenetetramine solution became viscous and continued to stir for 2 hours. The slurry was poured into a 5000ml autoclave lined with polytetrafluoroethylene, sealed and stirred, and reacted at 180°C for 50 hours, then taken out and dried at 120°C for 4 hours, and calcined at 600°C for 6 hours to obtain a small particle size chromium composite oxide A.

Embodiment 2

[0040] Weigh 1579 grams of Cr(NO 3 ) 3 9H 2 O, 5147 g Al(NO 3 )3·9H 2 O is dissolved in deionized water, continue to stir and slowly add 250 grams of 10% sodium hydroxide solution, 300 grams of 10% hexamethylenetetramine solution becomes viscous, continue stirring for 2 hours, and pour the slurry into 5000ml of polytetrafluoroethylene Sealed and stirred in an ethylene-lined autoclave, reacted at 180°C for 50 hours, took it out and dried it at 120°C for 4 hours, and roasted it at 600°C for 6 hours to obtain the small particle size chromium composite oxide B.

Embodiment 3

[0042] Weigh 700 grams of A, 100 grams of ultrafine α-alumina, mix evenly, add 300 grams of nitric acid acidified pseudo-boehmite, knead evenly, extrude into strips, dry at 120°C for 2 hours, and roast at 600°C for 6 hours to obtain Unmodified catalyst C 1 , weighed 57 g of ZrCl 4 , adding deionized water to prepare a solution, weighing 1000 grams of C 1 Uniformly impregnated in ZrCl 4 solution, after standing for 2 hours, dry at 120°C for 4 hours, and roast at 600°C for 6 hours to obtain modified catalyst C 2 , the modified catalyst C 2 Under the conditions of 750° C., normal pressure, and 100% steam, high-temperature steam aging treatment was carried out for 12 hours to obtain propane dehydrogenation catalyst D.

[0043] Wherein, the mass content of chromium oxide on the catalyst is 20%, and the mass content of zirconium oxide is 3%.

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

The invention discloses a propane dehydrogenation catalyst and a preparation method thereof. Chromium compound oxide is used as an active component, is mixed with a high-performance thermal carrier, is added with an adhesive and a modifying element, and then is mixed and kneaded, subjected to band extrusion, dried and roasted to prepare the catalyst. The propane dehydrogenation catalyst comprisesthe following components in percentages by mass: 55-80% of the chromium compound oxide, 10-30% of the high-performance thermal carrier, 0.1-10.0% of a modifying element and the balance of the adhesive. The dispersity of chromium on the carrier is improved by synthesizing the chromium compound oxide, and the effective utilization rate of the active component and the conversion rate of the raw material propane are increased effectively; by metal modification treatment, the activity and selectivity of the catalyst are improved, and then, the yield of propylene is increased; by high-temperature water vapor treatment, the acid content and the acid strength of the surface of the carrier are greatly reduced, and the coking and olefin cracking reaction of the catalyst is relived effectively; and by addition of the high-performance thermal carrier, the catalyst utilization efficiency is improved effectively, and the production load of the device is increased.

Description

technical field [0001] The invention relates to a low-carbon alkane dehydrogenation catalyst and a preparation method thereof, in particular to a catalyst for producing propylene by catalytic dehydrogenation of propane and a preparation method thereof. Background technique [0002] Propylene is an important chemical raw material widely used in the production of chemical products such as polypropylene, acrylic acid, propylene oxide and acrylonitrile. my country's propylene mainly comes from co-production or by-products of naphtha cracking and catalytic cracking processes. However, with the increase in propylene consumption year by year, the traditional propylene production can no longer meet the demand. Therefore, the technology of propane dehydrogenation to propylene is developing rapidly. It has become the third largest source of propylene after methanol to olefins. [0003] For chromium-based propane dehydrogenation catalysts, since the prior art mostly uses the impregnati...

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): B01J23/26B01J37/02B01J37/10C07C5/333C07C11/06
CPCB01J23/26B01J37/0201B01J37/10C07C5/3332C07C2523/26C07C11/06Y02P20/52
Inventor 龚旭辉
Owner 洛阳市科创石化科技开发有限公司
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