| Document |
Document Title |
|
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...
|
|
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...
|
|
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-...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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.
|
|
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...
|
|
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 ...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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)...
|
|
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...
|
|
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 ...
|
|
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...
|
|
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...
|
|
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...
|
|
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 ...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
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 ...
|
|
JP2729806B2 |
|
|
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...
|
|
JP2720170B2 |
|
|
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-...
|
|
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 ...
|
|
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...
|
|
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...
|
|
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...
|
|
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...
|
|
JP2676895B2 |
|
|
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) ...
|
|
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 ...
|
|
JP2649736B2 |
|
|
JPH09227509A |
To produce an amide in high yield by rearranging an oxime in the presence of hydrogen chloride, an N,N-di-substituted amide and an acid halide at a high reaction rate under a mild temperature condition. An oxime is subjected to rearrange...
|
|
JPH09227510A |
To enable efficient lactam production by recycling the rearrangement catalyst without its deactivation. After the liquid-phase Beckmann rearrangement of an oxime, for example, using hydrogen chloride as a catalyst, the formed lactam (sui...
|
|
JP2640583B2 |
|
|
JPH09507850A |
Process for the preparation of a linear omega -formyl-carboxylic acid or a corresponding linear formylnitrile compound starting from an internally unsaturated C4-C12 carboxylic acid or a corresponding ester or nitrile by means of hydrofo...
|
|
JP2635351B2 |
Frozen crystal layers are purified by a process in which these crystal layers, after they have been frozen out from a melt or solution on a cooling surface, are brought into contact with a purifying liquid and thus purified over their en...
|
