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Document Title |
JP2000502660A |
PCT No. PCT/EP96/05521 Sec. 371 Date Jun. 16, 1998 Sec. 102(e) Date Jun. 16, 1998 PCT Filed Dec. 11, 1996 PCT Pub. No. WO97/23454 PCT Pub. Date Jul. 3, 1997Caprolactam and hexamethylenediamine are prepared simultaneously starting from ad...
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JP2000044536A |
To provide -caprolactam having extremely high Pz which is an index of the amount of impurities included in the -caprolactam, useful for raw material or the like of a polyamide resin. This -caprolactam includes less than 25 ppm of impurit...
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JP2000038377A |
To recycle nylon 6 products by adding -caprolactam to a specific reaction liquor to efficiently separate, recover and remove non-meltable matter existing in the liquor and efficiently recover -caprolactam. Nylon 6 products are recycled b...
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JPH11349562A |
To obtain -caprolactam in high yield by Beckmann rearrangement of cyclohexanoxime using [B] β-zeolite in a vapor phase within a specific temperature range. This -caprolactam is obtained by Beckmann rearrangement of cyclohexanoxime using...
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JPH11322661A |
To provide a method for producing cyclohexanone from benzene without waste by utilizing byproduct cyclohexane from CHE process (a combination of the partial hydrogenation of benzene with the hydration reaction of cyclohexene), and to pro...
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JPH11322740A |
To provide a method for industrially advantageously producing a high-quality -caprolactone having excellent polymer color tone without requiring repeated rectification for improving purification. In this method for producing -caprolacton...
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JPH11279144A |
To provide a method for producing -caprolactam by bringing cyclohexanone oxime into contact with a solid catalyst in a gaseous phase in an improved catalyst life and in a high selectivity. This method for producing -caprolactam comprises...
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JPH11511485A |
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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JPH11510485A |
PCT No. PCT/EP96/02954 Sec. 371 Date Sep. 3, 1998 Sec. 102(e) Date Sep. 3, 1998 PCT Filed Jul. 5, 1996 PCT Pub. No. WO97/03953 PCT Pub. Date Feb. 6, 1997Compounds of the formula (I) in which A is oxygen, sulphur or NH; B is a group of th...
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JP2945350B2 |
To selectively obtain lauryllactam useful as a monomer for producing a polyamide 12 type polymer by photonitrosating cyclododecane in the presence of hydrochloric acid and trichloronitrosomethane as a nitrosating agent. A 85% sulfuric ac...
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JP2930676B2 |
Caprolactam is purified continuously by passing a 75-95% strength by weight aqueous caprolactam solution together with hydrogen at 50 DEG -95 DEG C. and 1.5-100 bar upward through a fixed-bed supported palladium or nickel catalyst in a t...
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JP2929003B2 |
To provide a method for producing a lactam compound in a short time by a new, simple procedure, without needing a large quantity of an acid required for neutralization, or expensive catalyst or solvent, by treating an oxime derivative of...
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JPH11508913A |
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 temperatur...
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JPH11507944A |
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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JPH11506440A |
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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JPH11152266A |
To depolymerize a polyamide without producing waste stream as far as possible, with high selectivity of the polyamide to the corresponding monomer components, by using a specific amount of a catalyst in the presence of an aliphatic alcoh...
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JP2898604B2 |
The prepn. of lactam comprises: (i) semi-hydrogenation of dinitrile to aminonitrile; (ii) simple purification of aminonitrile prod.; and (iii) hydrolysis/cyclisation of aminonitrile.
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JPH11505231A |
A process for preparing caprolactam by reacting 6-aminocapronitrile with water in the presence of catalysts comprises using a starting mixture of 6-aminocapronitrile and the tetrahydroazepine derivative of the formulaand conducting the r...
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JPH11505230A |
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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JPH1135554A |
To provide a method for recovering highly pure -caprolactam capable of being used on the same level with a virgin -caprolactam. This method for recovering -caprolactam comprises a step for regulating the pH of an -caprolactam aqueous sol...
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JPH111471A |
To depolymerize polyamide into its monomer components in a high conversion in water under a specific range of pressure by using an alkali or alkaline earth metal compound. (A) One or more kinds of polyamides are depolymerized into its mo...
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JPH10511668A |
Crude capronitrile is purified by hydrogenation, subsequent treatment in an acidic medium and subsequent distillation in an alkaline medium, by a process in which (a) 6-aminocapronitrile is converted into crude caprolactam by reaction wi...
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JPH10298162A |
To obtain a high-purity recovered -caprolactam capable of using in a level equivalent to virgin -caprolactam and provide a method for purifying the recovered -caprolactam. A depolymerized or hot water-extraction-treated -caprolactam aque...
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JPH10287645A |
To obtain a recovered caprolactam with impurity content of a specified level or lower, by purifying an -caprolactam, obtained by, e.g. depolymerization of Nylon 6, using an adequate process, e.g. enrichment, recrystallization, or distill...
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JPH10510280A |
Caprolactam is obtained from caprolactam-containing polymers in the presence of superheated water by bringing polymers which contain the repeating unit -[-N(H)-(CH2)5-C(O)-]- or mixtures consisting essentially of -from 40 to 99.9% by wei...
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JPH10510282A |
Caprolactam is obtained from mixtures which contain polymers or thermoplastic molding materials having the repeating unit -N(H)-(CH2)5-C(O)- (a) by cleavage at elevated temperatures in the presence of a base under reduced pressure or (b)...
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JPH10510279A |
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 50...
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JPH10509963A |
Caprolactam is prepared by reacting a solution of 6-aminocapronitrile with water in the liquid phase at elevated temperatures by a process in which (a) an aqueous solution of 6-aminocapronitrile in the liquid phase is heated without the ...
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JPH10509965A |
Caprolactam is prepared by cleaving oligomers or polymers containing essentially the repeating unit -[-N(H)-(CH2)5-C(O)-]- in the presence of a catalyst at elevated temperatures by a process in which the cleavage is carried out in the li...
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JPH10509728A |
An improved process for the preparation of caprolactam by heating 6-aminocapronitrile in the presence of a heterogenous catalyst and water under superatmospheric pressure without rapid deactivation of the catalysts used. The process furt...
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JP2782919B2 |
Disclosed is a method for purifying a lactam-containing organic solution which comprises processing an organic solution containing at least one lactam with an anion exchange resin to remove an anionic surface active substance contained i...
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JP2769983B2 |
PURPOSE: To provide a process for the production of a lactam by the vapor- phase reaction of an aliphatic aminonitrile using a specific catalyst. CONSTITUTION: This production process is characterized by the use of a catalyst consisting ...
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JP2764545B2 |
PURPOSE: To easily and efficiently obtain the subject derivative useful as a synthetic intermediate for β-amino acid derivatives or antibiotics having penicillin-simulated structure, by reaction between an isocyanate and a vinyl ether c...
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JP2755749B2 |
Caprolactam is prepared in a process comprising the following steps: (a) reacting the 5-formylvaleric ester with liquid ammonia as reaction medium and hydrogen in the presence of a ruthenium catalyst in liquid phase at from 80 DEG to 140...
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JP2755748B2 |
Caprolactam is prepared by heating a 6-aminocaproic ester in liquid phase in the presence of water to 230 DEG -350 DEG C. under superatmospheric pressure in a reaction medium comprising a liquid aromatic hydrocarbon having a boiling poin...
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JPH1087610A |
To produce a N-substituted lactam economically and advantageously in an industrial scale by a reaction of a specified lactam with an organic halogen compound in the presence of a specific catalyst and specific base without solvents. This...
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JPH1087611A |
To produce -caprolactam useful as a material for nylon at a high conversion rate and with high selectivity by a catalytic gas-phase conversion of cyclohexanone oxime in the presence of a specific alcohol by the use of a specific zeolite ...
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JP2729806B2 |
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JPH1072418A |
To provide a method for producing an amide from the oxime by using a catalyst excellent in catalytic activity and selectivity, not substantially changing and recoverable by heat treatment. This method for producing an amide from the oxim...
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JP2720170B2 |
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JPH10502064A |
Cyclic lactams are prepared by reacting an aminocarboxylic acid compound of the formula I H2N-(CH2)m-COR1 I where R1 is -OH, -O-C1-C12-alkyl or -NR2R3 and R2 and R3, independently of one another, are each hydrogen, C1-C12-alkyl or C5-C8-...
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JP2713014B2 |
PURPOSE: To obtain the subject compound having high quality and useful as a raw material for nylon by reacting cyclohexanone with a hydroxylamine mineral acid salt under specific condition and subjecting the reaction product to Beckmann ...
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JPH1036332A |
To remove water contained in a cyclohexanone oxime hydrochloride oily substance to be supplied to a Beckmann's rearrangement reaction. Cyclohexanone oxime hydrochloride salt is mixed with an organic solvent (e.g. a halogenated hydrocarbo...
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JPH1036344A |
To efficiently separate a lactam in an amide by the coexistence of an amine with an equimolar amount or more of hydrogen chloride. When the number of mol of an N,N-disubstituted amide such as N,N-dimethylformamide is A, the number of mol...
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JPH09301952A |
To industrially and advantageously produce and amide compound capable of reducing the corrosion of an apparatus without requiring a neutralizing step with an alkali due to no use of an acid by using a reactional system containing a speci...
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JPH09301951A |
To industrially and advantageously produce an amide compound, capable of reducing the corrosion of an apparatus without requiring a neutralizing step with an alkali after reaction due to no use of an acid by rearranging an oxime compound...
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JP2676895B2 |
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JPH09291074A |
To convert cyclohexanone oxime into the subject compound in a gaseous phase in high selectivity by using crystalline alcohol. This method for producing epsilon-caprolactam comprises bringing (C) cyclohexanone oxime into contact with (A) ...
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JPH09241236A |
To obtain -caprolactam useful as a raw material for nylons in high conversion and in high selectivity by reacting cyclohexanone oxime in the presence of a type zeolite in a gaseous phase. This method for producing -caprolactam comprises ...
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JP2649736B2 |
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