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JP2013528604A |
Processes for making pyrrolidones include providing a clarified diammonium succinate (DAS)-containing and/or monoammonium succinate (MAS)-containing fermentation broth; distilling the broth under super atmospheric pressure at a temperatu...
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JP2013136523A |
To provide a method for producing ε-caprolactam, capable of obtaining high quality ε-caprolactam from crude ε-caprolactam by using evaporative crystallization in good yield.This production method of ε-caprolactam comprises: a purific...
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JP5231693B2 |
The amine content of amine-contaminated N-substituted lactams is reduced by treatment with an acidic macroporous cation exchanger.
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JP2013129609A |
To provide a method for producing ε-caprolactam that has a process in which ε-caprolactam is crystallized while controlling scaling in a vessel.The method for producing ε-caprolactam includes a crystallization step of crystallizing ε...
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JP2013119046A |
To provide a reaction apparatus in which catalytic activity of a solid catalyst is hardly deteriorated.The reaction apparatus 1 includes: a reactor 2 in which gaseous raw materials are reacted chemically with each other in the presence o...
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JP2013119539A |
To provide a method for obtaining efficiently high-purity ε-caprolactam, concerning a method for purifying ε-caprolactam by distillation after concentrating recovered ε-caprolactam-containing water.In this method for purifying recover...
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JP2013095700A |
To provide a method for producing a lactam compound (III) and/or an amide compound (IV) with an excellent selectivity by converting a lactone compound (I) with an excellent conversion.By making a lactone compound (I) and ammonia or an am...
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JP2013514335A |
The invention relates to a process for treating an aqueous solution containing epsilon-caprolactam, ammonium sulphate and one or more other impurities, comprising one or more organic impurities from a caprolactam production process and o...
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JP2013049649A |
To provide a production method of ε-caprolactam, for producing high-quality ε-caprolactam, which has fewer impurities, with a good yield.The production method includes: an ε-caprolactam purification step A of obtaining purified ε-cap...
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JP5102491B2 |
The invention relates to a process for purifying caprolactam, said process comprising (a) subjecting the caprolactam to a hydrogenation by treating the caprolactam with hydrogen in the presence of a heterogeneous nickel containing hydrog...
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JP5100945B2 |
A process for working up residues from the preparation of pyrrolidone and/or N-vinylpyrrolidone comprises subjecting the residues to a thermolysis.
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JP5101486B2 |
The invention relates to the field of production of lactams from aminonitriles, and in particular to the production of epsilon-caprolactam by the vapor phase hydrolytic cyclization of 6-aminocapronitrile. A crude liquid caprolactam compr...
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JP2012214496A |
To simply obtain 2-pyrrolidone used as a raw material for polyamide-4,N-methyl-2-pyrrolidone, and polyvinyl pyrrolidone in low energy and at low costs as a main purpose.A method for using a microorganism or an enzyme solution prepared by...
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JP2012525347A |
A method for preparing lactams by cyclizing hydrolysis of a corresponding aminonitrile is described. A method for manufacturing a lactam by reacting an aminonitrile with water in the presence of a catalyst involving placing the water and...
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JP5024578B2 |
The invention relates to a process for the crystallization of substances having a narrow metastable supersaturation zone. In the process the saturation of a solution is gradually increased and the solution is seeded for the crystallizati...
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JP5016234B2 |
To provide a method of depolymerizing a polyamide, whereby depolymerization of a polyamide is carried out without causing corrosion in a metallic apparatus; and to provide a production method for a monomer of a polyamide. The method of d...
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JP5014792B2 |
The invention relates to a process for preparing caprolactam by admixture of cyclohexanone oxime to a reaction mixture comprising caprolactam and sulfuric acid using a mixing device, said mixing device comprising (i) a tube through which...
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JP5014791B2 |
The invention relates to a process for preparing caprolactam by admixture of cyclohexanone oxime to a reaction mixture comprising caprolactam and sulfuric acid using a mixing device, said mixing device comprising (i) a tube through which...
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JP2012158501A |
To provide a method for producing zeolite excellent in catalytic activity and catalyst life, and to provide a method for stably producing ε-caprolactam over a long period of time by reacting cyclohexanone oxime at a high conversion rati...
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JP4987894B2 |
In the production of µ-caprolactam by contacting cyclohexanone oxime with a solid acid catalyst in the gaseous phase to effect a rearrangement reaction of the cyclohexanone oxime, wherein the solid acid catalyst is produced by calcining...
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JP4983041B2 |
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JP4981222B2 |
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JP4969722B2 |
The present invention relates to a process for the preparation of zeolitic catalysts comprising zeolite and oligomeric silica, which can be used in industrial reactors. The process consists in directly mixing the suspension, resulting fr...
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JP4961209B2 |
Method for making caprolactam from 6-aminocapronitrile that contains greater than 500 ppm tetrahydroazepine and its derivatives (THA) in which the THA is not removed from the method until after the caprolactam is produced.
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JP4961208B2 |
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 ...
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JP4957555B2 |
Disclosed is a commercially advantageous method for obtaining a monomer by performing a depolymerization reaction of a polyamide. Specifically disclosed is a method for obtaining a monomer through a depolymerisation reaction of a polyami...
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JP4946869B2 |
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JP4932507B2 |
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JP2012510478A |
The present invention relates to processes for the production of lactams such as e-Caprolactam, ?-Laurolactam, or of carboxylic acid amides such as acetaminophenol and benzanilide by Beckman rearrangement from the corresponding oximes in...
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JP4929645B2 |
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JP2012066977A |
To provide a method for producing zeolite which is excellent in respects of catalytic activity and catalyst life.The method for producing zeolite is characterized by including: a step (1) which prepares a matured product including crysta...
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JP2012056846A |
To provide a method of producing an amide or a lactam according to the Beckmann rearrangement of an oxime compound using a highly active catalyst system prepared by making use of inexpensive hydrogen chloride as a catalyst, capable of pr...
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JP4899587B2 |
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JP4886193B2 |
Methods and compounds for production of cycloproyl-fused pyrrolidine-based inhibitors of dipeptidyl peptidase IV are provided.
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JP2012036224A |
To provide a process for preparing azetidinones useful as intermediates in the synthesis of penems and as hypocholesterolemic agents.The process includes reacting a β-(substituted-amino)amide, a β-(substituted-amino)acid ester, or a β...
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JP4865708B2 |
The invention concerns a method for purifying cyclic lactams containing 6 to 12 carbon atoms and containing chlorolactams as impurities, by hydrogenation reaction in the presence of a metal catalyst, a solvent and a compound having a rad...
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JP2012501996A |
The invention relates to a process for extracting an impurity from an organic phase comprising caprolactam, comprising extracting the impurity by washing said organic phase as a discontinuous phase with an aqueous phase as a continuous p...
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JP4850320B2 |
Process for purifying an aqueous caprolactam mixture by extracting the caprolactam with the aid of an organic caprolactam solvent that is not miscible with water in a benzene extraction, and releasing the caprolactam from the organic sol...
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JP4798837B2 |
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JP2011201816A |
To provide a method of producing -caprolactam from cyclohexanone oxime using a low cost catalyst, a low cost solvent, and a low cost and useful additives.The liquid phase rearrangement of cyclohexanone oxime is carried out using tri-subs...
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JP2011201865A |
To provide a method for producing -caprolactam, which produces high-quality -caprolactam containing less impurity in a high yield.The method for producing -caprolactam includes an -caprolactam purification step A for obtaining purified -...
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JP2011168612A |
To provide a method for economically, selectively and efficiently reducing the content of amine existing in N-substituted lactams as an impurity.The method for reducing the amine content of amine-contaminated N-substituted lactams compri...
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JP4738588B2 |
The present invention relates to a method for the removal of the templating agent from synthetic zeolites in general and in particular from silicalite, titanium silicalite and from composite materials containing zeolites and for their ac...
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JP4716536B2 |
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JP4700350B2 |
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JP4700778B2 |
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JP4687692B2 |
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JP4681705B2 |
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JP2011088883A |
To provide a method for producing an amide or a lactam by which the amide or the lactam can be formed in high conversion and high yield without forming a large amount of byproducts such as ammonium sulfate in the method for producing the...
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JP4661071B2 |
The invention provides a method for producing ε-caprolactam comprising: a reaction process which subjects cyclohexanone oxime to a Beckmann rearrangement reaction in the presence of a solid catalyst; and a catalyst regeneration process ...
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