Acidic-functionalized ionic liquid as an efficient, green and reusable catalyst for hetero-Michael addition of nitrogen, sulfur and oxygen nucleophiles to α,β-unsaturated ketones
The invention relates to a process for preparing haloalkanes by reaction of alcohol with hydrogen halide, wherein the reaction of the alcohol with the hydrogen halide occurs in the presence of an ionic liquid at a temperature which is above 100° C. for at least part of the time and, at least at the time of the commencement of the reaction, the water content is not more than 25 mol % based on the amount of liquid, where the ionic liquid is not octyltrimethylammonium chloride.
The effect of an electron-withdrawing group in the imidazolium cation: the case of nitro-functionalized imidazolium salts as acidic catalysts for the acetylation of glycerol
作者:Eduardo M. Morais、Igor B. Grillo、Hubert K. Stassen、Marcus Seferin、Jackson D. Scholten
DOI:10.1039/c8nj02520g
日期:——
was achieved with high conversion and selectivity towards triacetin at low temperatures and short reaction times by using acidic imidazolium salts as catalysts. Moreover, the addition of a nitro group to the imidazoliumcation affords a much more competent catalyst, indicating a significant effect provided by the simple electronic change in the imidazoliumcation. Theoretical calculations revealed increased
[EN] DIRECT CARBON DIOXIDE HYDROGENATION TO FORMIC ACID IN ACIDIC MEDIA<br/>[FR] HYDROGÉNATION DIRECTE DE DIOXYDE DE CARBONE EN ACIDE FORMIQUE EN MILIEU ACIDE
申请人:EOS HOLDING SA
公开号:WO2014125409A1
公开(公告)日:2014-08-21
The present invention relates to a method of producing formic acid in a catalysed chemical reaction from hydrogen gas and carbon dioxide gas, said reaction being conducted in an acidic medium comprising a polar solvent over a wide range of temperatures at total gas pressure of hydrogen and carbon dioxide up to 250 bar without the addition of base, carbonate, hydrogen carbonate or formate. The method of the present invention is advantageous since the reaction may be conducted in a polar solvent such as water or DMSO.