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

A method for the direct one-step high-selectivity production of α-olefins from synthesis gas catalyzed by a CO-based catalyst

A high-selectivity, catalyst technology, applied in chemical instruments and methods, hydrocarbon production from carbon oxides, physical/chemical process catalysts, etc., can solve the problems of poor selectivity of α-olefin long carbon chain α-olefin, and achieve stability Good performance, mild reaction conditions, and favorable effects of formation and desorption

Active Publication Date: 2021-03-23
SHAANXI NORMAL UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor selectivity of α-olefins, especially long-chain α-olefins, in the existing one-step synthesis gas method, and to provide a simple and efficient synthesis gas direct one-step method for producing long-carbon-chain α-olefins with high selectivity. Methods

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 method for the direct one-step high-selectivity production of α-olefins from synthesis gas catalyzed by a CO-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In 10mL 10wt.%H 3 PO 4 Add 2.0g SiO to the aqueous solution 2 Mix well, vacuum impregnate the mixture for 5h, filter, wash, dry at 100°C for 12h, and bake at 500°C for 3h to obtain P / SiO 2 ; 2.47g Co(NO 3 ) 2 ·6H 2 O, 0.25g Zn(NO 3 ) 3 ·6H 2 O was dissolved in 20 mL of water, then 2.2 g of P / SiO was added with stirring 2 , stir evenly, vacuum impregnate the mixture for 5 hours, filter, wash, dry at 100°C for 12 hours, and roast at 400°C for 5 hours. %P / SiO 2 catalyst.

[0023] 0.5g 20%Co-2%Zn-0.1%P / SiO 2 The catalyst is placed in a fixed-bed reactor, and pure H 2 Gas (H 2 =99.9%), the temperature was raised to 400°C at a rate of 5°C / min and maintained for 5h. After the reduction, the temperature was lowered to 180°C, and the volume ratio of H 2 Syngas / CO volume ratio = 2.0, at a temperature of 220°C, a pressure of 1.0MPa, and a volume space velocity of 4.8L·g cat -1 h -1 The synthesis reaction of olefins was carried out under the conditions, and the re...

Embodiment 2

[0025] Dissolve 0.2g sucrose in 10mL water, stir well, add 2.0g SiO 2 Mix well, vacuum impregnate the mixture for 5h, filter, wash, dry at 100°C for 12h, and bake at 500°C for 3h to obtain C / SiO 2 ; 1.75g ​​Co(NO 3 ) 2 ·6H 2 O, 0.05g Mn(CH 3 COO)2 Dissolve in 20mL of water, then add 2.2g of C / SiO with stirring 2 , stir evenly, vacuum impregnate the mixture for 5 hours, filter, wash, dry at 100°C for 12 hours, and roast at 400°C for 5 hours. %C / SiO 2 catalyst. The obtained catalyst was subjected to the synthesis reaction of olefins according to the method of Example 1, and the reaction results are shown in Table 1.

Embodiment 3

[0027] Dissolve 0.03g sodium alginate in 10mL water, stir well, add 2.0g Al 2 o 3 Mix well, vacuum impregnate the mixture for 5 hours, filter, wash, dry at 100°C for 12 hours, and roast at 500°C for 3 hours to obtain Na-C / Al 2 o 3 ; 1.75g ​​Co(NO 3 ) 2 ·6H 2 O, 0.22g Ce(NO 3 ) 2 ·6H 2 O was dissolved in 20 mL of water, then 2.2 g of Na-C / Al was added under stirring 2 o 3 , stir evenly, vacuum impregnate the mixture for 5 hours, filter, wash, dry at 100°C for 12 hours, and roast at 400°C for 5 hours. %Na-0.05%C / Al 2 o 3 catalyst. The obtained catalyst was subjected to the synthesis reaction of olefins according to the method of Example 1, and the reaction results are shown in Table 1.

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
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for directly high-selectively preparing alpha-olefin in one step by catalyzing synthetic gas with a Co-based catalyst. According to the method, the Co-based catalyst employs cobalt metal or an oxide thereof as an active component, at least one of C, N and P as a first additive, at least one metal, or an oxide thereof, from Mn, Mg, Zn, Ce, La, Zr, Fe, Cr, Cu, Mo, Ti, Ln and Ga as a second additive, and at least one or silicon oxide, aluminum oxide, titanium oxide and zirconium oxide being a carrier. In a low reaction temperature zone of 200-230 DEG C, by means of the catalyst, conversion per pass of CO can reach up to 76%, selectivity of CH4 is not more than 8.0%, selectivity of CO2 is not more than 1.0%, selectivity of olefin can reach 60% at most, and long-chain alpha-olefin (C >= 4) accounts for 70%. The catalyst has high activity, good long-period stability and high long-chain alpha-olefin yield. The catalyst is simple in preparation method, has extensive sources of additives and carrier raw materials, and is low in amplification effect in large-scale production.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation of carbon monoxide, and in particular relates to a method for preparing α-olefins in a one-step process with high selectivity by catalyzing synthesis gas with a Co-based catalyst. Background technique [0002] Combining coal, biomass, etc. with synthesis gas (CO+H 2 ) into clean liquid fuels or high value-added chemicals through the Fischer-Tropsch (F-T) synthesis process, which plays an important role in the clean and efficient utilization of coal resources. α-Olefin is an important chemical raw material with a wide range of applications and high added value. It is of great theoretical significance and practical application value to develop the technology of syngas to produce high-quality α-olefins with high selectivity in one step through F-T synthesis. [0003] F-T synthesis is essentially a surface polymerization reaction. Due to the limitation of Anderson-Schulz-Flory (ASF) polymeriza...

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): C07C1/04C07C11/02B01J23/889B01J23/83B01J23/78B01J23/34B01J27/185B01J27/24
CPCB01J23/34B01J23/78B01J23/83B01J23/8892B01J27/1853B01J27/24C07C1/0435C07C11/02
Inventor 刘忠文朱敏莉宋永红刘昭铁
Owner SHAANXI NORMAL UNIV
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