Abstract:
A process of biogenesis of L-Lysine from e-caprolactam or e-caprolactam degradation or related intermediates selected from e-Amino Caproic Acid (AC A), Amino Adipic Acid, Adipic Acid, Norlecucine or any combinations thereof, by microorganisms or their enzymes, and more particularly microorganisms belonging to groups selected from Alcaligenes spp., Arthrobacter spp., Bacillus spp., Pseudomonas spp. and Rhodococcus spp., in a reaction medium is provided. The biotransformation process is performed leading to biogenesis of L-Lysine from e-caprolactam or e-caprolactam degradation or related intermediates selected from e-Amino Caproic Acid (AC A), Amino Adipic Acid, Adipic Acid, Norlecucine or any combinations thereof, in presence of any or combinations of modulators or inhibitors, and then isolating the L-Lysine from the reaction mixture. A process of biogenesis of L-Lysine from e-caprolactam or e-caprolactam degradation or related intermediates selected from e-Amino Caproic Acid [ACA], Amino Adipic Acid, Adipic Acid, NorLeucine or any combinations thereof, by microorganisms or their enzymes, and more particularly microorganisms belonging to groups Alcaligenes spp., Arthrobacter spp., Bacillus spp., Pseudomonas spp. and Rhodococcus spp.; in a reaction medium. The biotransformation process is performed leading to biogenesis of L-Lysine from e-caprolactam or e-caprolactam degradation or related intermediates selected from e-Amino Caproic Acid [ACA], Amino Adipic Acid, Adipic Acid, NorLeucine or combination thereof, in presence of any or combination of modulators/ inhibitors, and then isolating the L-Lysine from the reaction mixture.
Abstract:
The invention relates to a method for preparing caprolactam comprising recovering a mixture containing 6-aminocaproic acid, from a culture medium comprising biomass, and thereafter cyclising the 6-aminocaproic acid in the presence of superheated steam, thereby forming caprolactam, wherein the weight to weight ratio carbohydrate to 6-aminocaproic acid in said mixture is 0.03 or less.
Abstract:
The invention relates to the field of production of lactams from aminonitriles, and in particular to the production of ε-caprolactam by the vapor phase hydrolytic cyclization of 6-aminocapronitrile. A crude liquid caprolactam comprising ε-caprolactam (CL), 6-aminocapronitrile (ACN) and water obtained from a vapor phase cyclization reaction of ACN is contacted with hydrogen in the presence of a hydrogenation catalyst to convert the ACN in the crude liquid caprolactam to a product comprising hexamethylenediamine (HMD) and hexamethyleneimine (HMI). Tetrahydroazepine (THA) in the crude liquid caprolactam is converted to HMI during this hydrogenation. The HMD and HMI have lower boiling points compared to ACN and thus they are more easily separated from CL in the subsequent distillation operations. Thus a process to make CL from ACN with fewer distillation stages, and with lower pressure drop and lower base temperature, is accomplished.
Abstract:
Method for making caprolactam from 6-aminocapronitrile that contains greater than 500 ppm tetrahydroazepine and its derivatives (THA) in which ammonia and water are removed from crude caprolactam in a single separation step and then THA is removed from the resulting caprolactam melt.
Abstract:
Process for the preparation of a mixture of epsilon -caprolactam and epsilon -caprolactam precursors by reductively aminating 5-formylvaleric acid and/or 5-formylvalerate ester(s) in water with hydrogen and an excess of ammonia in the presence of a hydrogenation catalyst, wherein the process is conducted in a reactor of which the inside reactor wall material is a material containing at most 8 wt.% nickel.
Abstract:
A process for the production of 6-aminocaproamide comprising reacting 5-cyanovaleramide with hydrogen in the presence of a metal catalyst. The 6-aminocaproamide is useful, for example, in the production of caprolactam and nylon 6.
Abstract:
The invention relates to a method for the production of caprolactam from a compound of formula (I): NC-(CH2)5-CO-R where R = a carboxamido, carboxlic acid or carboxylate ester group, characterised in that a) a compound (I), or mixtures thereof are hydrogenated with hydrogen in the presence of ammonia, a catalyst (II) and optionally a fluid solvent (VI) to give a mixture (III), b) separation of catalyst (II) and hydrogen from the mixture (III) to give a mixture (IV) and c) reaction of mixture (IV), in the presence of a catalyst (V) and optionally a fluid solvent (VII), to give caprolactam.
Abstract:
The invention relates to a method for producing caprolactam, which is characterized by a) reacting, in the presence of a catalyst, a mixture (I) that contains 6-aminocapronitrile and water in the gaseous phase to give a mixture (II) that contains caprolactam, ammonia, water, high-boiling and low-boiling substances, subsequently b) removing the ammonia from mixture (II), thereby producing a mixture (III) that contains caprolactam, water, high-boiling and low-boiling substances, c) removing the water from mixture (III), thereby producing a mixture (IV) that contains caprolactam, high-boiling and low-boiling substances, and finally d) obtaining by crystallization a caprolactam-containing solid substance (V) from mixture (IV), the weight percentage of caprolactam in the solid substance (V) being higher than in mixture (IV).
Abstract:
The present invention relates to processes for the production of alpha -aryl- beta -ketonitriles, which serve as synthetic intermediates in the preparation of a series of biologically important molecules such as corticotropin releasing factor (CRF) receptor antagonists.
Abstract:
The invention relates to a process for the purification of crude epsilon -caprolactam, wherein crude epsilon -caprolactam prepared by cyclization of alkyl 6-aminocaproate, 6-aminocapronitrile, 6-aminocaproic acid, 6 aminocaproic amide and/or oligomers thereof, is subjected to a crystallization process.