Abstract:
A continuous method for depolymerizing polycaprolactam waste into caprolactam is described. In the method, a melt of the polycaprolactam waste and an inert gas are fed to a reactor in a continuous manner. Water and an aromatic hydrocarbon are also fed to the reactor and the polycaprolactam waste is contacted with superheated steam of the water/hydrocarbon mixture at a temperature of between 260°C and 300°C and at a gauge pressure from 1 barg to 70 barg. Turbulent mixing conditions are created in the reactor, and a caprolactam-containing vapor stream is created in the reactor which exits the reactor at an outlet. The caprolactam is separated from the exited caprolactam-containing vapor stream by partial condensation, and collected. A reactor system for carrying out the method is also described.
Abstract:
Die Oxidations- und Bleichwirkung von Persauerstoffverbindungen bei niedrigen Temperaturen sollte verbessert werden. Dies gelang im Wesentlichen durch den Einsatz von unter Perhydrolysebedingungen organische Peroxosäuren mit kationischer Gruppe bildender Verbindungen, bei denen ein quaternäres N-Atom Teil eines heterocyclischen 6-gliedrigen Restes ist.
Abstract:
The present invention refers to a new process for the production of epsilon caprolactam (CPL) from 6-aminocaproic acid (6-ACA) which can be obtained either from traditional petro chemical processes or which can be obtained from biochemical processes. With the proposed process the reaction time for conversion of 6-aminocaproic acid to the Nylon 6 monomer is shorter and significant energy savings are possible which is advantageous for industrial scale production. The conversion of 6-aminocaproic acid to the Nylon 6 monomer runs at atmospheric pressure and in the final product epsilon caprolactam with no oligomers formation of significance is obtained.
Abstract:
The present invention relates to 5,6-dihydro-4H-[1,2,4]triazolo[4,3-a][1]benzazepine derivatives of general formula (I) and/or salts thereof and/or geometric isomers thereof and/or stereoisomers thereof and/or enantiomers thereof and/or racemates thereof and/or diastereomers thereof and/or biologically active metabolites thereof and/or prodrugs thereof and/or solvates thereof and/or hydrates thereof and/or polymorphs thereof which are centrally and/or peripherally acting V1a receptor modulators, particularly V1a receptor antagonists. Additional subject of the present invention is the process for the preparation of the compounds and the intermediates of the preparation process as well. The invention also relates to the pharmaceutical compositions containing the compounds or together with one or more other active substances, as well as to the use in the treatment and/or prophylaxis of a disease or condition associated with V1a receptor function.
Abstract:
Provided herein are methods of producing compounds, such as cyclohexanone, hexanediamine, hexanediol, hexamethylenediamine, caprolactam and nylon, from 5- (halomethyl)furfural.