Abstract:
Catalytic processes for preparing caprolactam, pipecolinic acid, and their derivatives, from lysine or alpha-amino-epsilon-caprolactam starting materials, and products produced thereby. A process for preparing caprolactam or a derivative thereof, the process comprising contacting a reactant comprising lysine or alpha aminocaprolactam with a catalyst and a gas comprising hydrogen gas, in the presence of a solvent. The catalyst may be provided on a support material, such as a transition metal.
Abstract:
The invention relates to a method for preparing an intermediate compound for a diisocyanate, comprising reacting a diamine represented by the formula H 2 N-(CH 2 ) 0 -Y-(CH 2 ) p -NH 2 wherein Y is selected from CH(OX) or CH(COOX), o and p each are an integer of 0-4, with the proviso that the sum of o and p is 4 or less, preferably 2, 3 or 4, X is a protective group, with a carbonylbislactam, preferably carbonylbiscaprolactam, thereby forming a compound with the formula (I) wherein each L is a lactam from the carbonylbislactam.
Abstract:
A process for producing a lactam, characterized by subjecting an alicyclic primary amine to an oxidation reaction in the presence of a catalyst comprising silicon oxide; and the catalyst comprising silicon oxide which is for use in the process.
Abstract:
Verfahren zur Herstellung von N,N'Carbonylbis-ε-caprolactam durch Umsetzung von ε-Caprolactam mit Phosgen in Gegenwart eines Chlorwasserstoff bindenden Mittels in einem inerten organischen Lösungsmittel und Isolierung des Umsetzungsproduktes aus der Produktlösung, wobei die Isolierung die Schritte umfasst: a) gegebenenfalls Abdestillieren eines Teils des organischen Lösungsmittels von der Produklösung; b) Zugabe von Wasser zu der Produktlösung; c) Entfernung des organischen Lösungsmittels durch azeotrope Destillation, gegebenenfalls unter Ersatz des abdestillierten Wassers, wodurch die Produktlösung an organischem Lösungsmittel verarmt; d) Kristallisieren lassen von N,N'-Carbonylbis-ε-caprolactam aus der an organischem Lösungsmittel verarmten Lösung, wobei eine wässrige Suspension von N,N'-Carbonylbis-ε-caprolactam erhalten wird; und e) Abtrennung des Kristallisats.
Abstract:
Process for producing lactam compounds and Beckmann rearrangement catalysts There is provided a catalyst which is highly active, stable and safe and forms less byproducts for a process for producing a lactam, and a production process. A cycloalkylidene-aminoaxy-1,3,5-triazine compound is provided as a Beckmann rearrangement catalyst and/or a reaction starting material in a reaction process for producing a lactam compound.
Abstract:
The present invention provides methods for making N-methylpyrrolidine and analogous compounds via hydrogenation. Novel catalysts for this process, and novel conditions/yields are also described. Other process improvements may include extraction and hydrolysis steps. Some preferred reactions take place in the aqueous phase. Starting materials for making N-methylpyrrolidine may include succinic acid, N-methylsuccinimide, and their analogs.