METHOD FOR PRODUCING CATALYST FOR CYCLIC CARBONATE SYNTHESIS
申请人:MARUZEN PETROCHEMICAL CO., LTD.
公开号:US20160108071A1
公开(公告)日:2016-04-21
The present invention provides a method for easily and inexpensively producing a heterogeneous catalyst used to synthesize a cyclic carbonate by reacting an epoxide with carbon dioxide and having excellent catalyst activity; a catalyst obtained using said manufacturing method; and a method for synthesizing a cyclic carbonate using said catalyst.
A method for producing a catalyst that is used for the purpose of synthesizing a cyclic carbonate by subjecting to a reaction an epoxide with carbon dioxide, said method comprising the following steps (a) and (b):
(a) a step of obtaining a catalyst precursor having a haloalkyl group or a haloaryl group by reacting a silane compound with a silica gel in the presence of xylene, the silane compound having a haloalkyl group or a haloaryl group and
(b) a step of obtaining a catalyst for synthesizing a cyclic carbonate by reacting the catalyst precursor obtained in step (a) with a tertiary phosphine.
A Fast Catalytic Process of Transfer of a Phosphorus Atom: How Folding of the Reagent is Related to its Catalytic Activity. A Possible Correlation with Rna Behavior
作者:Graziano Baccolini、Gabriele Micheletti
DOI:10.1080/10426507.2014.883625
日期:2014.8.3
different Grignardreagents giving, in a very fast and in a highly selective manner, only one phosphorus-containing compound with an enormous rate enhancement with respect to the corresponding no-catalyzed reaction which gives a final cluttered mixture of many organophosphorus products. The focal factor to explain this highly selective process of P transport lies in the folded structure of the reagent with
摘要 描述了一种简单且非常快速的磷原子转移过程,该过程由作为催化剂的简单分子在几乎无限的催化循环中进行。该催化剂将一个 P 原子提供给两种不同格氏试剂的混合物,以非常快速和高度选择性的方式,仅产生一种含磷化合物,相对于相应的无催化反应,具有极大的速率提高,从而产生许多有机磷产品的最终杂乱混合物。解释这种高选择性 P 传输过程的焦点因素在于试剂的折叠结构,围绕磷原子具有特定角度,这可以促进环状三方双锥五配位物质的形成,进而促进其催化活性。以类似的方式,RNA 可以采用,在一个精确的位置,一个特定的三维结构,可能有助于形成导致催化功能的五配位物种。图形概要
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.
METHYL-IODIDE-FREE CARBONYLATION OF AN ALCOHOL TO ITS HOMOLOGOUS ALDEHYDE AND/OR ALCOHOL
申请人:EASTMAN CHEMICAL COMPANY
公开号:US20160185701A1
公开(公告)日:2016-06-30
Disclosed is a process for the reductive carbonylation of a low molecular weight alcohol to produce the homologous aldehyde and/or alcohol. The process includes conducting the reaction to produce the aldehyde in the presence of a catalyst complex composed of cobalt, an onium cation and iodide in a ratio of 1:2:4 with a phosphine ligand. A ruthenium co-catalyst is used in the production of the homologous alcohol. The reductive carbonylation reaction does not require an additional iodide promoter and produces a crude reductive carbonylation product substantially free of methyl iodide.
ORGANOMETALLIC COMPOUND, CATALYST FOR POLYMERIZATION OF POLAR GROUP-CONTAINING NORBORNENE AND PROCESS FOR PRODUCING NORBORNENE POLYMER
申请人:Watanabe Saisuke
公开号:US20090247729A1
公开(公告)日:2009-10-01
An organometallic compound obtained by mixing following (a), (b) and (c): (a) a neutral organopalladium complex that has a palladium atom and two organic ligands each having at least three carbon atoms participating in a bond to the palladium atom; (b) an organophosphorus compound having one phosphorus atom; and (c) a salt comprising: an anion having no unshared electron pair in a central atom; and a counter-cation. And a process for producing a norbornene compound polymer, the process comprising: subjecting at least one norbornene compound represented by formula (A) as defined in the specification to polymerization reaction in a presence of an organometallic complex catalyst produced by mixing compound (a) and compound (d) described in the specification.