Supercharge Your Innovation With Domain-Expert AI Agents!

Catalyst for producing low-carbon olefins by dehydrogenation of low-carbon alkanes and its use method

A technology for low-carbon olefins and low-carbon alkanes, applied in the field of catalysts, can solve the problems of decreased selectivity and low activity, and achieve the effects of uniform distribution and high dispersion.

Active Publication Date: 2018-04-06
CHINA PETROLEUM & CHEM CORP +1
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the activity of the existing catalyst is not high during high temperature use or after charcoal regeneration, and the selectivity gradually decreases during operation; a new low-temperature catalyst is provided. Carbon alkane dehydrogenation platinum catalyst carrier, the catalyst is used in the process of low-carbon alkane dehydrogenation to low-carbon olefins, and has the advantages of high catalyst conversion rate and stable selectivity under high temperature and charcoal regeneration conditions

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 for producing low-carbon olefins by dehydrogenation of low-carbon alkanes and its use method
  • Catalyst for producing low-carbon olefins by dehydrogenation of low-carbon alkanes and its use method
  • Catalyst for producing low-carbon olefins by dehydrogenation of low-carbon alkanes and its use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Get 754.56g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 245.81g zinc nitrate (Zn(NO3 ) 2 6H 2 O), 48.44g nickel nitrate (Ni(NO 3 ) 2 6H 2 O) be dissolved in 2000ml of deionized water; at 25°C, under vigorous stirring, slowly add 15% ammonia by weight dropwise to the mixed aqueous solution to form a precipitate, control the pH value to 6.5, and filter the precipitate at room temperature overnight , washed, dried at 110°C, crushed, sieved, and calcined at 720°C for 18 hours to obtain a composite zinc aluminate carrier. XRD characterization (see figure 1 ) shows that the carrier has a typical spinel structure with a pore volume of 0.34cm 3 / g, specific surface area 86m 2 / g. The carrier composition and acidity are shown in Table 1.

[0035] The obtained carrier adopts impregnation technology to load the platinum component, that is, at room temperature, 15.0 g of the obtained carrier is impregnated with chloroplatinic acid (H 2 PtCl 6 6H 2 O, 0.16g) and an aqueous ...

Embodiment 2

[0038] Get 755.30g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 167.51g zinc nitrate (Zn(NO 3 ) 2 6H 2 O), 108.10g copper nitrate (Cu(NO 3 ) 2 6H 2 O) be dissolved in 2000ml deionized water; at 20 DEG C, under vigorous stirring, the ammoniacal liquor of 16%wt. is slowly added dropwise in this mixed aqueous solution, forms precipitation, and the pH value of control is 7.5, and after precipitation overnight at room temperature, Filter, wash, dry at 100°C, pulverize, sieve, and bake at 700°C for 10 hours to obtain a composite zinc aluminate carrier. XRD characterization shows that the carrier has a typical spinel structure with a pore volume of 0.32cm 3 / g, specific surface area 80m 2 / g. The carrier composition and acidity are shown in Table 1.

[0039] The obtained carrier adopts impregnation technology to load the platinum component, that is, at room temperature, 15.0 g of the obtained carrier is impregnated with chloroplatinic acid (H 2 PtCl 6 6H 2 O, 0.16g) and an aq...

Embodiment 3

[0042] Get 753.33g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 154.65g zinc nitrate (Zn(NO 3 ) 2 6H 2 O), 139.69g cobalt nitrate (Co(NO 3 ) 2 6H 2 O) be dissolved in 2000ml deionized water; at 20 DEG C, under vigorous stirring, the ammoniacal liquor of 20%wt. is slowly added dropwise in this mixed aqueous solution, forms precipitation, and the pH value of control is 7.4, and after precipitation overnight at room temperature, Filter, wash, dry at 100°C, pulverize, sieve, and bake at 750°C for 5 hours to obtain a composite zinc aluminate carrier. XRD characterization shows that the carrier has a typical spinel structure with a pore volume of 0.35cm 3 / g, specific surface area 51m 2 / g. The carrier composition and acidity are shown in Table 1.

[0043] The obtained carrier adopts impregnation technology to load the platinum component, that is, at room temperature, 15.0 g of the obtained carrier is impregnated with chloroplatinic acid (H 2 PtCl 6 6H 2 O, 0.16g) and an aqu...

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
Bronsted acidityaaaaaaaaaa
radiusaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to a low-carbon alkane dehydrogenation platinum catalyst and a use method thereof, which mainly solves the problems of low conversion rate of the catalyst and decrease of selectivity during use in the prior preparation technology. In the present invention, transition metal elements such as copper, nickel, manganese, and cobalt are firstly introduced into the zinc aluminate carrier by co-precipitation method to obtain a composite metal oxide carrier, and then the platinum component is loaded by impregnation method, that is, the soluble salt of platinum is impregnated. Aqueous solution, after drying, calcining and steam treatment, platinum catalyst can be obtained. By using propane / isobutane as raw material, under the conditions of reaction temperature 520-620°C, reaction pressure 0-0.4MPa, alkane mass space velocity 0.1-8.0h-1, H2O / CnH2n+2 volume ratio 1-18, The technical scheme that the raw material is contacted with the catalyst to generate propylene / isobutene through reaction can better solve the problem, and can be used in the industrial preparation of the catalyst for the dehydrogenation of light alkanes to light olefins.

Description

technical field [0001] The invention relates to a catalyst used for dehydrogenating low-carbon alkanes to produce low-carbon olefins and a use method thereof. Background technique [0002] Propylene / isobutylene mainly comes from the co-production or by-product of steam cracking and fluid catalytic cracking in refineries, and can be widely used in the synthesis of polymers, gasoline additives, rubber and various chemical intermediates. With the increasing demand for low-carbon olefins, the traditional production process is difficult to meet the rapid growth of market demand. A large amount of low-carbon alkanes obtained from refineries are the main components of liquefied petroleum gas, which are mainly used as civil fuels. The development of the process of producing low-carbon alkenes from low-carbon alkanes is of great significance for making full use of low-carbon alkanes to open up new sources of alkenes. At present, the alkane catalytic dehydrogenation technology is re...

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): B01J23/89B01J23/656B01J23/652B01J23/62B01J23/60C07C11/06C07C11/09C07C5/333
CPCY02P20/52
Inventor 吴文海缪长喜樊志贵曾铁强姜冬宇
Owner CHINA PETROLEUM & CHEM 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