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WO/1999/011613A1 |
The invention relates to the use of essentially shaped bodies containing a catalytically active oxide as a catalyst comprising no soluble constituent, under the reaction conditions, for the production of cyclic lactams by reacting aminoc...
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WO/1999/011615A1 |
The present invention relates to mouldable materials which can be used as a catalyst for producing cyclic lactames by reacting aminocarboxylic acid nitriles with water in a liquid phase in a fixed bed reactor. The mouldable materials con...
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WO/1999/011616A1 |
The present invention provides a process for the preparation of purified caprolactam comprising the steps of: (a) depolymerizing polyamide-containing carpet in the presence of steam to obtain crude caprolactam and steam; (b) removing sub...
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WO/1999/011614A1 |
The invention relates to a process for producing cyclic lactams by reacting aminocarboxylic acid nitriles with water, in liquid phase, in a fixed bed reactor, in the presence of a catalyst containing a catalytically active oxide comprisi...
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WO/1999/010519A1 |
The present invention relates to a process for the production of substantially enantiomerically pure intermediates of formula (IV), wherein P is an activating and protecting group, from their racemates by treating the mixture with an acy...
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WO/1998/050355A1 |
The invention relates to a method for producing cyclic lactams of formula (I), in which R?1� stands for a hydrogen atom, an alkyl, a cycloalkyl or an aryl; A stands for a C�3?-C�12?-alkylene radical, which can be substituted by 1, ...
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WO/1998/049140A1 |
The invention relates to a process for recovering caprolactam from a neutralized rearrangement mixture, which rearrangement mixture comprises a solution of caprolactam in water and a solution of ammonium sulphate in water, by extraction ...
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WO/1998/046564A1 |
This invention relates to a composition commprising (a) epsilon caprolactam and (b) one or more of 5-[4,5-di(3-carboxypropyl)-2-pyridyl]pentanoic acid or salt or amide, 4-[4,5-di(2-carboxypropyl)-2-pyridyl]-2-methylbutanoic acid or salt ...
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WO/1998/046565A1 |
This invention relates in part to processes for producing one or more substituted or unsubstituted epsilon caprolactams, e.g., epsilon caprolactam, which comprises: (a) subjecting one or more substituted or unsubstituted alkadienes to hy...
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WO/1998/041502A1 |
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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WO/1998/037063A1 |
Process to prepare $g(e)-caprolactam by treating 6-aminocaproic acid, 6-aminocaproate ester or 6-aminocaproamide or mixtures comprising at least two of these compounds in the presence of superheated steam in which a gaseous mixture compr...
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WO/1998/035938A1 |
This continuous process for preparing an aqueous mixture of $g(e)-caprolactam and 6-aminocaproic acid and/or 6-aminocaproamide which involves, as the reductive amination step, continuously contacting 5-formylvaleric acid or an alkyl 5-fo...
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WO/1998/017641A1 |
The invention concerns a method for treating lactams directly derived from the synthesis process, avoiding as far as possible the formation of oligomers. More precisely it concerns a method for treating a lactam from a reaction flux deri...
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WO/1998/017642A1 |
Process to separate $g(e)-caprolactam from 6-aminocaproamide and 6-aminocaproamide oligomers, wherein $g(e)-caprolactam, 6-aminocaproamide and 6-aminocaproamide oligomers are present in a first aqueous starting mixture, which mixture is ...
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WO/1998/015529A1 |
The invention concerns the aminomethylation of pentenoic acid derivatives, by reaction with carbon monoxide, hydrogen and ammonia, for preparing caprolactam. More precisely it consists in a method for preparing caprolactam, characterised...
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WO/1998/009944A1 |
Process for the preparation of $g(e)-caprolactam, in which in a step (a) a compound with general formula (1): O=CH-(CH¿2?)¿4?-C(O)-R, in which R is -OH, -NH¿2? or O-R', in which R' is an organic group with 1 to 10 carbon atoms, is con...
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WO/1998/006694A1 |
The present application describes amidinophenyl-pyrrolidines, -pyrrolines, and -isoxazolidines and derivatives thereof of formula (I), or pharmaceutically acceptable salt forms thereof, wherein one of D and D' may be C(=NH)NH�2? and th...
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WO/1998/006693A1 |
Method for the production of lactams from aliphatic $g(v) aminonitriles in a gas phase, in the presence of water and heterogenous catalysts, in which oxides and/or metal hydrated oxides selected from tin, zirconium, hafnium, bismuth, van...
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WO/1998/005636A1 |
A method for purifying lactams by liquid-liquid extraction and/or processing with an ion exchange resin is disclosed. The method is useful for purifying lactams produced by the cyclising vapour-phase hydrolysis of an aliphatic aminonitri...
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WO/1998/003481A1 |
The invention concerns the preparation of caprolactam by cyclizing 6-aminocapronitrile in the presence of water at high temperature and optionally of a catalyst and a solvent by: a) separating from the reaction yield ('reaction yield I')...
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WO/1998/002416A1 |
The invention relates to a process for the separation of a ketoxime or aldoxime from a ketoxime- or aldoxime-containing amide mixture in which the ketoxime or aldoxime is separated from the amide mixture by means of distillation. This ha...
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WO/1997/047596A1 |
The invention concerne a method of purifying 'epsilon'-caprolactam by reacting raw caprolactam with a complex hydride of boron or aluminium.
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WO/1997/044318A1 |
A process for the preparation of five-membered or six-membered ring lactams from aliphatic 'alpha','omega'-dinitriles has been developed. In the process an aliphatic 'alpha','omega'-dinitrile is first converted to an ammonium salt of an ...
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WO/1997/040000A1 |
This invention relates in part to processes for producing one or more substituted or unsubstituted hydroxyaldehydes, e.g., 6-hydroxyhexanals, which comprise subjecting one or more substituted or unsubstituted alkadienes, e.g., butadiene,...
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WO/1997/034868A1 |
The present invention provides an improved process for the recovery of caprolactam from polycaprolactam processing waste. The present process for depolymerizing polycaprolactam waste to form caprolactam comprises the step of: in the abse...
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WO/1997/030973A1 |
Process to prepare 'epsilon'-caprolactam starting from a liquid aqueous mixture containing an alcohol and 6-aminocaproic acid by cyclization of 6-aminocaproic acid in the aqueous mixture at an elevated temperature. The alcohol is separat...
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WO/1997/030974A1 |
Process for the preparation of a mixture of 'epsilon'-caprolactam, 6-aminocaproic acid and 6-aminocaproic amide by heating an aqueous mixture containing ammonia and oligomers of 6-aminocaproic acid and/or of 6-aminocaproic amide, the aqu...
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WO/1997/030028A2 |
Process to separate 'epsilon'-caprolactam from an aqueous mixture containing 'epsilon'-caprolactam and at least 0.5 wt.% oligomers, wherein the separation is performed by extraction using an organic extraction agent. The aqueous mixture ...
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WO/1997/025983A1 |
The present invention provides novel indane-like compounds which can be useful for treating psychosis and other conditions associated with the modulation of a muscarinic receptor. The invention provides formulations and methods for using...
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WO/1997/026300A1 |
This invention relates to a novel solid phase process for the preparation of indane combinatorial librairies (1). These libraries have use for drug discovery and are used to form wellplate components (3) of novel assay kits, as illustrat...
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WO/1997/023454A1 |
A process is disclosed for simultaneously preparing caprolactam and hexamethylene diamine starting from adipodinitrile.
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WO/1997/020813A1 |
The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-...
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WO/1997/006137A1 |
A process for recovering monomer from multi-component waste material that includes a hydrolyzable polymer, includes contacting the multi-component waste material with water and subjecting the resulting mixture to heat and pressure to for...
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WO/1997/003953A1 |
Compounds of the formula (I) in which A is oxygen, sulphur or NH; B is a group of the formula (IIa) or (IIb); and the other variables have the meaning given in claim 1, may be used as inhibitors of the enzyme cyclo-oxygenase II.
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WO/1997/003956A1 |
A process for the preparation of 'epsilon'-caprolactam which comprises converting cyclohexanol prepared by the hydration of cyclohexene into cyclohexanone through dehydrogenation, converting the cyclohexanone into cyclohexanone oxime and...
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WO/1997/003048A1 |
A process for depolymerizing nylon (6) and recovering caprolactam from the depolymerized products by extraction with alkyl phenolic compounds. Process steps include (a) treating a first mixture comprising nylon (6) with water at a temper...
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WO/1997/001525A1 |
A process for recovering 2,2-dimethylpropanoic acid in highly pure form from a mixture of 2,2-dimethylpropanoic acid and impurities which may be obtained in the production of a beta lactam antibiotic, by degrading impurities and separati...
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WO/1997/000846A1 |
Dicarboxylic acid and diamine are recovered from polyamides by hydrolysis with nitric acid, followed by separation of the dicarboxylic acid, and hydrogenation of the nitric acid, and then recovery of the diamine.
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WO/1996/038407A1 |
The production of cyclohexanonoxim by the reaction of cyclohexanone with a hydroxyl ammonium salt, i.e. hydroxyl ammonium formiate, and the production of caprolactam by the Beckmann rearrangement of cyclohexanonoxim in a C1-C4 carboxylic...
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WO/1996/036600A1 |
Production of cyclic lactams by the reaction of amino carboxylic acid nitriles with water, performed in the liquid phase in the presence of heterogeneous catalysts based on titanium dioxide with a rutile content in the range from 0.1 to ...
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WO/1996/036601A1 |
The production of caprolactam by reacting 6-amino capronitrile with water in the presence of catalysts, using an initial mixture of 6-amino capronitrile and the tetrahydroazepine derivative of formula (I), and reaction in the liquid phas...
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WO/1996/022974A1 |
A method for preparing lactam by means of a vapour phase reaction between an aliphatic aminonitrile and water in the presence of a solid catalyst, wherein the catalyst is an alumina having a specific surface area of at least 10 m2/g, as ...
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WO/1996/020931A1 |
The invention concerns the simultaneous preparation of caprolactam and hexamethylene diamine from adipodinitrile, by the following steps: (a) the adipodinitrile is partially hydrogenated, producing a mixture substantially containing 6-am...
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WO/1996/020923A1 |
Cleaning raw caprolactam by hydration, subsequent treatment in an acid medium and final distillation in an alkaline medium, in which (a) 6-amino capronitrile is converted into raw caprolactam by reaction with water; (b) difficultly and e...
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WO/1996/018614A1 |
Caprolactam is obtained from mixtures which contain polymers or thermoplastic molding materials having the repeating unit -[-N(H)-(CH2)5-C(O)-]-, (a) by depolymerization at elevated temperatures in the presence of a base under reduced pr...
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WO/1996/018612A1 |
Caprolactam is obtained from caprolactam-containing polymers in the presence of a base under reduced pressure by depolymerizing polymers which contain the repeating unit -[-N(H)-(CH2)5-C(O)-]- or mixtures consisting essentially of: from ...
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WO/1996/018613A1 |
Disclosed is a method of obtaining caprolactam from polymers containing caprolactam in the presence of superheated water. The proposed method is based on the use of polymers containing the repeating unit -[-N(H)-(CH2)5-C(O)-]- or mixture...
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WO/1996/017826A1 |
Method for preparing caprolactam by heating 6-aminocapric acid nitrile in the presence of heterogeneous catalysts ans water under elevated pressure, wherein (a) 6-aminocapric acid nitrile or a mixture containing essentially 6-aminocapric...
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WO/1996/016937A1 |
The invention concerns the preparation of caprolactam by decomposing oligomers or polymers, which essentially contain the recurrent unit -[-N(H)-(CH2)5-C(O)-]-, in the presence of a catalyst and at high temperature. Decomposition is carr...
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WO/1996/016936A1 |
Described is a method for the production of caprolactam by reacting a solution of 6-aminocaproic acid nitrile with water in the liquid phase at elevated temperature. The reaction is carried out as follows: a) an aqueous solution of 6-ami...
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