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JPS647984B2 |
A process for the preparation of caprolactam wherein, in a first stage, cyclohexanone-oxime is vaporized, in the presence of inert gases, by bringing it into contact with a fluidized bed of inert solid particles at from 150 DEG to 250 DE...
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JPS644818B2 |
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JPS6365661B2 |
The invention relates to a process for the preparation of lactames according to the so-called "Beckmann rearrangement" which consists in isomerizing oximes in a sulfuric solution, the weight ratio percentage of sulfuric acid to the combi...
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JPS6348581B2 |
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JPS6339586B2 |
An improved process for the preparation of 2-pyrrolidone by the liquid phase hydrogenation of succinonitrile in the presence of a hydrogenation catalyst and ammonia, whereafter the resulting hydrogenation product is hydrolyzed with water...
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JPS6338356B2 |
An improved process for the preparation of a lactam-magnesium compound which involves bringing into intimate admixture a lactam monomer represented by the following structural formula: wherein Y is an alkylene group having from 3 to 12 c...
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JPS62178571A |
epsilon -caprolactam is prepared by a process in which (a) a 5-formylvalerate is reacted with water in the presence of an acidic agent at from 30 DEG to 200 DEG C., (b) the 5-formylvaleric acid thus obtained is reacted with excess ammoni...
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JPS62108861A |
The present invention is a process for preparing lactams having 8 to 15 carbon atoms by the Beckmann rearrangement of the corresponding oximes in a solution of an organic solvent by means of 0.5 to 10% by weight referred to the oxime of ...
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JPS6230790A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS6153341B2 |
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JPS6149305B2 |
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JPS6132334B2 |
A catalyzed process for the preparation of monomeric and/or polymeric compounds such as esters, polyesters, ester-amides, and polyester-polyamides which result from the reaction of an imide and an alcohol in the presence of a Group IA, I...
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JPS6121946B2 |
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JPS612657B2 |
A process for the purification of acid-containing crude caprolactam obtained by the rearrangement of cyclohexanone oxime, wherein the crude caprolactam is mixed with from 0.8 to 2.0 equivalents of a base, from 3 to 6 parts by weight of t...
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JPS6056707B2 |
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JPS60239462A |
PURPOSE: To obtain a Grignard salt of lactam useful as a basic catalyst and a reagent for various reactions by one reaction operation safely, by reacting a metal Mg with an alkyl halide or an aryl halide and a lactam. CONSTITUTION: A lac...
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JPS6053012B2 |
A process for the purification of a solution of epsilon -caprolactam in benzene, toluene or xylene by washing with a liquid, wherein the washing liquid is a solution of epsilon -caprolactam in water in a weight ratio of from 15 : 1 to 1 ...
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JPS6051464B2 |
A process for recovering substantially pure epsilon -caprolactam from a contaminated solution thereof is disclosed by concentrating, if needed, the caprolactam content of the solution to about 60-75 weight percent then extracting the con...
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JPS6047252B2 |
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JPS6047277B2 |
Novel azetidine derivatives of the formula I wherein R1 is an acylamido group, R2 is selected from the group consisting of IIA IIB IIC IID wherein R4, R5 and R6 are individually selected from the group consisting of hydrogen, lower alkyl...
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JPS6047254B2 |
The process is directed to recovering epsilon -caprolactam from a reaction mixture containing epsilon -caprolactum and sulfuric acid by separating the caprolactam from the sulfuric acid by an extraction. Extraction includes the steps of ...
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JPS6047253B2 |
A process for removing sulfuric acid from reaction mixtures containing sulfuric acid and epsilon -caprolactam by treating the sulfuric acid with ammonia and sulfur dioxide to produce ammonium sulfate salts and reducing the ammonium sulfa...
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JPS60199875A |
The invention is concerned with a method of purifying caprolactam as obtained by Beckmann transposition or by nitrosation of cyclohexyl compounds, characterized in that it comprises the following steps:a) the caprolactam oil is treated w...
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JPS60174765A |
PURPOSE: To obtain high-purity caprolactam, etc., by forming ozonized oxygen by an ozonizer using O2 as a raw material, diluting O2 in the ozonized oxygen with an intert gas to a concentration safe in use to give an O3 gas, purifying cap...
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JPS60166648A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS60155155A |
The invention relates to a process for recovering capro- actam from a residue remaining in a destillation, under reduced pressure, of impure caprolactame, obtained by rearrangement of cyclohexanone-oxime with sulphuric acid or oleum. The...
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JPS6026385B2 |
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JPS6026103B2 |
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JPS60105663A |
N-(C1-C4-Alkyl)caprolactam is prepared by reaction of oligomers of caprolactam in an alumina fluidised bed with C1-C4-alkanols in the presence of water vapour at a temperature of 290 to 400 DEG C.
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JPS6021980B2 |
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JPS6021583B2 |
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JPS6021584B2 |
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JPS6021582B2 |
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JPS6021585B2 |
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JPS6021140B2 |
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JPS6021146B2 |
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JPS6021144B2 |
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JPS6021142B2 |
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JPS6021143B2 |
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JPS6021141B2 |
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JPS6021145B2 |
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JPS6020382B2 |
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JPS6020376B2 |
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JPS6020377B2 |
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JPS6020380B2 |
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JPS6020379B2 |
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JPS6020378B2 |
In a process for the preparation of lactam from cycloalkanone comprising reacting said alkanone with hydroxylamine sulfate to form the corresponding cycloalkanone oxime followed by Beckman rearrangement to yield said lactam and neutraliz...
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JPS6020381B2 |
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JPS6020375B2 |
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JPS6020383B2 |
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