CAS: 7488-55-3; Tin(Ii) Sulfate

专利信息

专利号:WO-2020253244-A1
优先权日:2019-06-20
标 题 :Process for catalytic synthesis of lactide
发明人：JIANG WEI; ZHANG YANKAI; SUN PING; LI AIMIN; ZHANG QUANXING
权利人:NANJING UNIVERSITY OF TECHNOLOGY; NANJING QUANKAI RES INSTITUTE OF BIOMATERIALS CO LTD
摘要:The present invention provides a process for the catalytic synthesis of lactide, comprising: mixing a lactic acid oligomer with a composite catalyst; and synthesizing lactide under a heating condition, and collecting the product using a vacuum distillation mode. The used composite catalyst is composed of a zinc or tin compound and an alkali metal compound. Compared with the prior art, the advantages of the present invention are that: the used composite catalyst features a high production rate with a small use amount, a low reaction temperature (150-220°C), and a short reaction time (2-5 h), has a single pass yield that may reach 95% or more, reduces energy consumption compared with the prior art, and facilitates industrial implementations.

专利号:US-12331007-B2
优先权日:2021-10-15
标题 :Use of a multidentate phosphite ligand in the catalytic synthesis of adiponitrile
发明人：CHEN ZHIRONG; WU WENBIN; YIN HONG; ZHA ZENGSHI; WANG KEYAN; MA LI; HUANG GUODONG; ZHOU GUIYANG; XU YONG
权利人:ZHEJIANG NHU CO LTD; ZHEJIANG NHU SPECIAL MAT CO LTD; ZHEJIANG NHU NYLON MAT CO LTD
摘要:A multidentate phosphite ligand is used in the catalytic synthesis of adiponitrile. The ligand is represented by the following general formula (I). The method of catalytic synthesis of adiponitrile comprises primary hydrocyanation, isomerization, and secondary hydrocyanation reactions, wherein the catalyst adopted each comprises a phosphite ligand-nickel complex composed of a nickel precursor and a multidentate phosphite ligand. The ligand molecule has a higher electron cloud density, and the phosphorus content capable of participating in coordination in the ligand molecule per unit mass is higher, so that the catalytic activity of the catalyst is improved, and the amount of the catalyst is reduced.

专利号:US-5876587-A
优先权日:1995-12-29
标题 :Electrochemical synthesis of transition metal/phosphine catalysts
发明人：HORBEZ DOMINIQUE; HUSER MARC; PERRON ROBERT
权利人:RHONE POULENC CHIMIE
摘要:Catalyst compounds comprising at least one transition metal in an oxidation state of 0 to 1, and at least one monodentate or bidentate water-soluble phosphine, well suited for the hydrocyanation of ethylenically unsaturated compounds, are electrochemically synthesized, by electrolyzing an aqueous solution catholyte (contained in the cathode compartment of any suitable electrolytic cell) comprising at least one transition metal compound and at least one monodentate or bidentate water-soluble phosphine, advantageously at least one phosphine having the following formulae (I) and/or (II): P(Ar1)a(Ar2)b(Ar3)c(D1)d(D2)e(D3)f(I) (Ar1)a(Ar2)b(D1)d(D2)eP-L-P(Ar1)g(Ar2)h(D1)i(D2)j(II).

专利号:US-8697902-B2
优先权日:2008-06-17
标 题:Preparation of nitriles from ethylenically unsaturated compounds
发明人：MASTROIANNI SERGIO
权利人:MASTROIANNI SERGIO; RHODIA OPERATIONS
摘要:A process for the hydrocyanation of a hydrocarbon-based compound having at least one site of ethylenic unsaturation into a nitrile compound includes reaction thereof, in a liquid medium, with hydrogen cyanide in the presence of a catalyst containing a metal element selected from among the transition metals and an organophosphorus ligand, wherein the organophosphorus ligand is a compound of formula (I): n n n n n n n n n n The subject process is particularly useful for the synthesis of adiponitrile from butadiene.

专利号:US-7470805-B2
优先权日:2002-12-23
标题:Process of synthesis of compounds having nitrile functions from ethylenically unsaturated compounds
发明人：ROSIER CECILE; MARION PHILIPPE; BOURGEOIS DAMIEN
权利人:RHODIA OPERATIONS
摘要:A process of hydrocyanation of diolefins such as butadiene is carried out in the presence of a catalytic system comprising a transition metal and mono- and pluri-dentate organophosphorus ligands. The reaction medium containing branched nitrites subsequently is isomerized in the absence of hydrogen cyanide.

专利号:US-8039660-B2
优先权日:2001-09-18
标 题:Method of producing nitrile compounds
发明人：BASSET JEAN-MARIE; CHAUVIN YVES; GALLAND JEAN-CHRISTOPHE; NICCOLAI GERALD; VALERIO CHRISTINE; VALLEE CHRISTOPHE
权利人:RHODIA POLYAMIDE INTERMEDIATES
摘要:The present invention relates to the manufacture of nitrile compounds from unsaturated organic compounds by reaction with hydrogen cyanide. It relates more particularly to the manufacture of nitrile compounds of use in the synthesis of adiponitrile, an important chemical intermediate in the manufacture of major chemical compounds, such as hexamethylenediamine and ε-caprolactam. The invention provides a process for the manufacture of organic compounds comprising at least one nitrile functional group by carrying out a hydrocyanation reaction between hydrogen cyanide and an organic compound comprising at least one ethylenic unsaturation. This reaction is carried out in the presence of a catalytic system comprising a metal element chosen from the group consisting of nickel, platinum and palladium and an organophosphorus ligand, the reaction medium additionally comprising an ionic liquid in the liquid state at least at the temperature at which the hydrocyanation reaction is carried out.