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

Preparation of copper-bismuth-silicon dioxide catalyst

A silicon dioxide and catalyst technology, which is applied in the field of copper bismuth catalysts, can solve the problems of complex catalyst preparation process, unfavorable industrial development and use, unstable carrier magnesium silicate, etc., and achieve simple preparation process, uniform particle size, and improved stability Effect

Inactive Publication Date: 2016-11-16
XINJIANG UNIVERSITY
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of catalyst has the following disadvantages: (1) the carrier magnesium silicate is unstable and will dissolve in the reaction system, and its life is short; (2) the interaction between the carrier and copper species is weak, and the copper species has a high desolvability (3) The catalyst preparation process is complex, which is not conducive to industrial development and use

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Weigh 9.0 g cetyltrimethylammonium bromide (CTAB) and 28.5 g Na 2 SiO 3 10H 2 O was dissolved in 250 mL of water. Then weigh 7.2 g Cu(NO 3 ) 2 ·3H 2 O and 0.8 g Bi(NO 3 ) 3 ·5H 2 Dissolve O in 50 mL of water, add 5 mL of polyethylene glycol 400, quickly add 10 mL of concentrated ammonia water, and stir for 0.5 h. Add the mixed solution of copper and bismuth to the above solution containing CTAB and sodium silicate, stir for 0.5 h, then use 1 mol / LH 2 SO 4 Adjust the pH value of the solution to 9-10, stir at room temperature for 3-24 h, then centrifuge, wash with distilled water and absolute ethanol for several times, dry at room temperature, place in a high-temperature furnace and roast at 550°C for 5 h to obtain copper bismuth / silicon dioxide catalyst. The above-prepared catalyst was used for alkynylation reaction. After 7 hours of reaction, the conversion rate of formaldehyde was 66%, the selectivity of 1,4-butynediol was 91%, and the copper ion content in ...

Embodiment 2

[0012] Weigh 10.0 g of cetyltrimethylammonium bromide (CTAB) and 25.0 g of ethyl orthosilicate respectively and dissolve them in 100 mL of ethanol aqueous solution. Then weigh 7.2 g Cu(NO 3 ) 2 ·3H 2 O and 0.8 g Bi(NO 3 ) 3 ·5H 2 Dissolve O in 50 mL of water, add 5 mL of polyethylene glycol 400, quickly add 10 mL of concentrated ammonia water, and stir for 0.5 h. Add the copper-bismuth mixture to the above solution containing CTAB and ethyl orthosilicate, stir for 0.5 h, and then use 1 mol / LH 2 SO 4 Adjust the pH value to 9-10, stir at room temperature for 3-24 hours, then centrifuge, wash with distilled water and absolute ethanol several times, dry at room temperature, place in a high-temperature furnace and roast at 550°C for 5 hours to obtain a copper-bismuth / silica catalyst . The above-prepared catalyst was used for alkynylation reaction. After 7 hours of reaction, the conversion rate of formaldehyde was 67%, the selectivity of 1,4-butynediol was 90%, and the coppe...

Embodiment 3

[0014] Weigh 10.0 g of dodecylamine (DDA) and 25.0 g of tetraethylorthosilicate and dissolve them in 100 mL of ethanol solution. Then weigh 5.1 g CuCl 2 2H 2 O and 0.8 g Bi(NO 3 ) 3 ·5H 2 Dissolve O in 30 mL of water, add 5 mL of polyethylene glycol 400, quickly add 10 mL of concentrated ammonia water, and stir for 0.5 h. Add the copper-bismuth mixture to the above solution containing CTAB and ethyl orthosilicate, stir for 0.5 h, and then use 1 mol / LH 2 SO 4 Adjust the pH value to 9-10, stir at room temperature for 3-24 hours, then centrifuge, wash with distilled water and absolute ethanol several times, dry at room temperature, place in a high-temperature furnace and roast at 550°C for 5 hours to obtain a copper-bismuth / silica catalyst . The above-prepared catalyst was used for alkynylation reaction. After 7 hours of reaction, the conversion rate of formaldehyde was 60%, the selectivity of 1,4-butynediol was 94%, and the copper ion content in the filtrate after the rea...

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 relates to the preparation of a copper bismuth / silicon dioxide catalyst. It is characterized in that a copper-bismuth / silicon dioxide catalyst is prepared by a "one-pot method", the content of copper oxide is 10-40%, the content of bismuth is 1-10%, and the rest is silicon dioxide. Copper-bismuth species are highly dispersed on the inner and outer surfaces of silica, which improves the reaction center of the catalyst, enhances the wear resistance of the catalyst, and reduces the desolvation of copper ions. In the application of alkynylation reaction to synthesize 1,4-butynediol, the copper-bismuth catalyst has good activity, high selectivity, and low amount of copper species desolvation.

Description

technical field [0001] The invention relates to a copper-bismuth catalyst for producing 1,4-butynediol, which uses a "one-pot method" to prepare the copper-bismuth / silicon dioxide catalyst and its application in alkynylation. Background technique [0002] Copper-bismuth catalyst can catalyze acetylene and formaldehyde to generate 1,4-butynediol in the alkynylation reaction. 1,4-butynediol can be converted into 1,4-butanediol by hydrogenation reaction. 1,4-Butanediol is an important organic chemical raw material. A series of downstream chemical products can be prepared through reactions such as dehydrogenation and dehydration, such as polybutylene terephthalate (PBT), γ-butyrolactone (GBL ), polyurethane (PU), N-methylpyrrolidone (NMP), tetrahydrofuran (THF) and polytetramethylene glycol ether (PTMEG), etc. Due to the high industrial added value of 1,4-butanediol, its demand continues to grow. The industrial production process of 1,4-butynediol is mainly the improved alkyn...

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): B01J23/843C07C29/42C07C33/046
CPCB01J23/002B01J23/8437B01J2523/00C07C29/42
Inventor 杨桂花王吉德董长
Owner XINJIANG UNIVERSITY
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