Complex catalyst for synthesizing carbonate ester by using homogeneous oxidation carbonylation of alcohol (S), its prepn. tech. and use

A homogeneous oxidation and preparation technology, which is applied in the preparation of organic compounds, catalyst activation/preparation, organic compound/hydride/coordination complex catalysts, etc. low problems, to achieve the effect of stable catalyst structure, good selectivity and stability, and simple preparation process

Inactive Publication Date: 2006-06-28
NANJING UNIV OF TECH
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the catalysts used in the above methods all contain highly corrosive chloride ions, and there are technical problems such as equipment corrosion, large catalyst usage and poor stability.
[0013] Chinese patent CN1376665A proposes a new type of polymer complex catalyst, which uses a divalent copper system with better stability, and uses a high molecular polymer containing heteroatoms as a ligand. Lo

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

[0036] Weigh 11.2gCuBr 2 and 42.2g of tetraethylammonium bromide were dissolved in 100ml and 50ml of absolute ethanol or methyl acetate respectively, then the two were mixed, heated and boiled at 80°C, and maintained for about 70min, cooled to room temperature, filtered, and vacuumed Dry at 60°C to get 51.0g brown powder CuBr 2 - Tetraethylammonium bromide catalyst.

Embodiment 2

[0038] In a 1000ml autoclave, add 100ml methanol, 5gCuBr 2 -Tetraethylammonium bromide catalyst (Cu / N=1 / 2), use CO to replace the air in the reactor, then press CO to about 2.0MPa at room temperature, and when heated to 110°C, feed an appropriate amount of O 2 , maintain the reaction pressure at about 3.5MPa, and react for 2.5h. During the reaction process, the consumed CO and O need to be continuously replenished. 2 . After cooling, it was analyzed by gas chromatography. The selectivity of dimethyl carbonate is 99.5%, and the productivity of the catalyst is 2.5gDMC / g.cat.h.

Embodiment 3

[0040] Use 5gCuBr2-tetrabutylammonium bromide (Cu / N=1 / 2) as catalyzer, all the other conditions are with embodiment 2, dimethyl carbonate selectivity is 98.5%, and catalyst productivity is 3.0gDMC / g.cat.h .

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

A complex catalyst for preparing carbonate from alcohol by homogeneous oxidizing-carbonylating reaction has a chemical formula MXnLm, where M is metal, X is chosen from halogen, SO4 (or HSO4) radical, CO3 (or HCO3) radical, etc, L is chosen from RN4 ion, RP4 ion, pyridine, etc, and m=1-12. It is prepared through complex reaction between quaternary ammonium (or phosphorus) salt and metal salt. Its application method is also disclosed.

Description

technical field [0001] The invention belongs to the field of catalysts, and relates to a complex catalyst for synthesizing carbonates by homogeneous oxidative carbonylation of alcohols, and also relates to a preparation process and a use method of the complex catalyst. Background technique [0002] Carbonate (Carbonate), the general formula is: R and R' are chain alkyl or aromatic groups, R and R' can be the same or different; they can also be cyclic carbonates: R and R' can be alkyl, alkoxy and the like. [0003] Carbonates are a class of compounds that are widely used in industry. For example, carbonate is a high-boiling and highly polar organic solvent with excellent performance, widely used in the synthesis of pharmaceuticals and fine chemical intermediates; it can also be used as a fuel additive to improve the octane number of gasoline and reduce the exhaust gas generated by combustion; it can also be used as Organic compounds such as polycarbonate, polyurethane, a...

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): B01J31/22B01J37/00C07C68/00C07C69/96
Inventor 刘晓勤刘定华杨洋姚虎卿
Owner NANJING UNIV OF TECH
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