Selective Hydrogenation Catalyst and Methods of Making and Using Same
申请人:Cheung Tin-Tack Peter
公开号:US20100228065A1
公开(公告)日:2010-09-09
A composition comprising a supported hydrogenation catalyst comprising palladium and an organophosphorous compound, the supported hydrogenation catalyst being capable of selectively hydrogenating highly unsaturated hydrocarbons to unsaturated hydrocarbons. A method of making a selective hydrogenation catalyst comprising contacting a support with a palladium-containing compound to form a palladium supported composition, contacting the palladium supported composition with an organophosphorus compound to form a catalyst precursor, and reducing the catalyst precursor to form the catalyst. A method of selectively hydrogenating highly unsaturated hydrocarbons to an unsaturated hydrocarbon enriched composition comprising contacting a supported catalyst comprising palladium and an organophosphorous compound with a feed comprising highly unsaturated hydrocarbon under conditions suitable for hydrogenating at least a portion of the highly unsaturated hydrocarbon feed to form the unsaturated hydrocarbon enriched composition.
[EN] METHOD OF MAKING HYDROXYMETHYLPHOSPHONATE, POLYURETHANE FOAM-FORMING COMPOSITIONS, POLYURETHANE FOAM AND ARTICLES MADE THEREFROM<br/>[FR] PROCÉDÉ DE PRÉPARATION DE PHOSPHONATE D'HYDROXYMÉTHYLE, COMPOSITIONS FORMANT UNE MOUSSE DE POLYURÉTHANE, MOUSSE DE POLYURÉTHANE ET ARTICLES FAITS DE CETTE DERNIÈRE
申请人:ICL IP AMERICA INC
公开号:WO2014062313A1
公开(公告)日:2014-04-24
There is provided herein a method of making hydroxymethylphosphonate comprising reacting paraformaldehyde, at least one dialkyl phosphite and at least one trialkyl phosphite, in the presence of at least one amine catalyst.
METHOD OF MAKING HYDROXYMETHYLPHOSPHONATE, POLYURETHANE FOAM-FORMING COMPOSITIONS, POLYURETHANE FOAM AND ARTICLES MADE THEREFROM
申请人:ICL-IP AMERICA INC.
公开号:US20140378564A1
公开(公告)日:2014-12-25
There is provided herein a method of making hydroxymethylphosphonate comprising reacting paraformaldehyde, at least one dialkyl phosphite and at least one trialkyl phosphite, in the presence of at least one amine catalyst.
Visible-light-induced coupling of carboxylic acids with alcohols/amines via a phosphorous linchpin strategy
作者:Qiupeng Peng、Achyut Ranjan Gogoi、Ángel Rentería-Gómez、Osvaldo Gutierrez、Karl A. Scheidt
DOI:10.1016/j.chempr.2023.04.011
日期:2023.7
organic chemistry and has been well developed over the past century. These dehydrations are extensively used in medicinal chemistry and natural product synthesis due to the prevalence of these functional groups in bioactive molecules. Here, we report a divergent process from the expected ester/amide outcomes through a light-induced coupling of activated carboxylic acids and alcohols/amines to efficiently
There is now provided a method for making a polyisocyanate based rigid closed cell foam by reacting an organic isocyanate and a polyol composition containing a polyol having polyester linkages and a number average molecular weight of 400 or more, and at least about 8 php of a silicone-containing surfactant polymer, in the presence of an aliphatic or cycloaliphatic C4-C7 hydrocarbon blowing agent. Either mixed into the polyol composition at the time of foaming, mixed into an isocyanate, or both, is an aliphatic or cycloaliphatic C4-C7 hydrocarbon.