摘要:
Beschrieben wird ein Verfahren zur kontinuierlichen Herstellungvon Adipodinitril durch Hydrocyanierung von 3-Pentennnitril, bei dem man a) 3-Pentennitril hydrocyaniert unter Erhalt eines Reaktionsaustrags, der Adipodinitril enthält, b) in einer Aufarbeitung 1 aus dem Reaktionsaustrag des Reaktors R1 in einer ersten Destillationsvorrichtung als Kopfprodukt ein Gemisch enthaltend cis-2-Methyl-2- butennitril und cis-2-Pentennitril abtrennt, c) das Gemisch enthaltend cis-2-Methyl-2-butennitril und cis-2-Pentennitril aus Schritt b) in einem Reaktor R2 in Gegenwart von Aluminiumoxid als Katalysator kontinuierlich zu einem 3-Pentennitril enthaltenden Produktgemisch isomerisiert, d)aus dem Reaktionsaustrag des Reaktors R2 in einer Aufarbeitung 2 in einer Destillationsvorrichtung cis-2-Methyl-2-butennitril als Kopfprodukt abtrennt und ausschleust.
摘要:
Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphonite-containing compounds.
摘要:
The present invention is directed to a process for the manufacture of methyl limonitrile comprising a mixture of 3,7-dimethyl-2,6-nonadiene nitrile, 3,7-dimethyl-3,6-nonadiene nitrile and 7-methyl-3-methylene-6-nonene nitrile comprising the following steps: a) reacting 6-methyl-5-octen-2-one with cyano acetic acid and removing carbon dioxide and water, wherein the reaction and the removal of carbon dioxide and water are performed in the presence of a base and a co-base 1 in an organic solvent, and wherein the organic solvent is a solvent which forms a heteroazeotrop with water; b) removing the solvent and the base of the reaction mixture obtained after having performed step a) or step c) by distillation to obtain a reaction mixture, whereby this step may optionally be performed in the presence of a co-base 2; c) isomerizing the reaction mixture obtained after having performed step a) or step b) to obtain an isomerized reaction mixture in the presence of a co-base 2; whereby step b) can be performed before or after step c).
摘要:
L'invention concerne un procédé de synthèse d'esters d'acides ω-amino-alcanoïques en C11 et C12 comportant une étape de nitrilation en continu en phase gaz ou en phase mixte gaz-liquide, une étape de métathèse et une étape de réduction par hydrogénation, en utilisant comme matière première des esters d'acides ω-alcénoïques en C10 et C11.
摘要:
L'invention concerne de nouveaux aldéhydes et nitriles issus de l'isophorone de formule générale (I) présentant une fragrance particulière,(Formula I) (I) ainsi que l'utilisation de ces composés en parfumerie.
摘要:
The invention provides a continuous process for the production of 3-pentenenitrile, comprising: (a) contacting, in a reaction zone, a hydrogen cyanide-containing feed, a 1,3-butadiene-containing feed, and a catalyst precursor composition, wherein the catalyst precursor composition comprises a zero-valent nickel and at least one multidentate phosphorus-containing ligand selected from the group consisting of a phosphite, a phosphonite, a phosphinite, a phosphine, and a mixed phosphorus-containing ligand or a combination of such members; and (b) maintaining a residence time sufficient to convert about 95% or more of the hydrogen cyanide and to produce a reaction mixture comprising 3-pentenenitrile and 2-methyl-3-butenenitrile, wherein the 2-methyl-3-butenenitrile concentration is maintained below about 15 weight percent of the total mass of the reaction mixture.
摘要:
The invention provides a continuous process for the production of 3- pentenenitrile, comprising: (a) contacting, in a reaction zone, a hydrogen cyanide-containing feed, a butadiene-containing feed, and a catalyst precursor composition, wherein the catalyst precursor composition comprises a zero-valent nickel and at least one bidentate phosphite ligand selected from a member of the group represented by Structures I and II, in which all like reference characters have the same meaning, except as further explicitly limited: wherein R1 and R5 are independently selected from the group consisting of Ci to C5 hydrocarbyl, and R2, R3, R4, Re, R7 and R8 are independently selected from the group consisting of H and C1 to C4 hydrocarbyl; and (b) maintaining a residence time in the reaction zone sufficient to convert about 95% or more of the hydrogen cyanide and to produce a reaction mixture comprising 3-pentenenitrile and 2-methyl-3-butenenitrile, wherein the 2-methyl-3- butenenitrile concentration is maintained below about 15 weight percent of the total mass of the reaction mixture.
摘要:
A catalyzed vapor phase process for the hydrocyanation of acyclic diolefinic compounds to olefinic nitriles is described in which the olefinic double bond is not conjugated to the triple bond of the cyano group, wherein a catalyst composition comprising supported copper salts is used.
摘要:
The invention concerns a method for hydrocyanation of ethylenically unsaturated organic compounds into compounds comprising at least a nitrile function. More particularly, it concerns a method for hydrocyanation of organic compounds comprising at least a ethylenical bond by reacting hydrogen cyanide, in the presence of a catalytic system comprising a transition metal and an organophosphorus ligand. The organophosphorus ligand is a compound with monophosphanorbornadiene structure. The invention concerns in particular hydrocyanation of butadiene into adiponitrile.
摘要:
Multidentate phosphite ligands are disclosed for use in reactions such as hydrocyanation and isomerization. The catalyst compositions made therefrom and the various catalytic processes which employ such multidentate phosphite ligands are also disclosed. In particular, the ligands have heteroatom-containing substituents on the carbon attached to the ortho position of the terminal phenol group.