Abstract:
A METHOD FOR PREPARAING LACTAMS BY THE STEPS OF (1) CLEAVING AND ESTERIFYING A CYCLIC ALPHA-NITROKETONE WITH AN ALCOHOL TO FORM AN ALKYL OMEGA-NITROESTER AND (2) CATALYST HYDROGENATING AND CYCLIZING THE NITROESTER TO A LACTAM.
Abstract:
THIS INVENTION RELATES TO A PROCESS FOR PRODUCING DERIVATIVES OF 1,12-DODECANEDIOIC ACID E.G. 11-CYANOUNDECANOIC ACID BY SPRAYING DROPLETS OF 1,1''-PEROXDICYCLOHEXYLAMINE INTO A REACTOR CONTAINING AN INERT GASS MAINTAINED AT AN ELEVATED TEMPERATURE AND AT A PRESSURE OF AT LEAST 300 MM. HG.
Abstract:
In the production of caprolactam by reaction of 1,1''peroxydicyclohexylamine with alkali metal alkoxides, the reaction is carried out in a reaction medium which is a mixture of methanol and dimethylsulphoxide.
Abstract:
Caprolactam is made by reacting 1,1''-peroxydicyclohexylamine with alkali metal methoxide dissolved in methanol at a concentration of at least 4 gram moles/liter.
Abstract:
The present invention relates to novel methods for preparing cis-alkoxy-substituted spirocyclic 1-H-pyrrolidine-2,4-dione derivatives and also to novel intermediates and starting compounds, which are passed through or used in the method according to the invention.
Abstract:
In a process for oxidizing a feed comprising cyclohexylbenzene, the feed is contacted with oxygen and an oxidation catalyst in a plurality of reaction zones connected in series, the contacting being conducted under conditions being effective to oxidize part of the cyclohexylbenzene in the feed to cyclohexylbenzene hydroperoxide in each reaction zone. At least one of the plurality of reaction zones has a reaction condition that is different from another of the plurality of reaction zones. The different reaction conditions may include one or more of (a) a progressively decreasing temperature and (b) a progressively increasing oxidation catalyst concentration as the feed flows from one reaction zone to subsequent reaction zones in the series.
Abstract:
Catalytic processes for preparing caprolactam, pipecolinic acid, and their derivatives, from lysine or alpha-amino-epsilon-caprolactam starting materials, and products produced thereby. A process for preparing caprolactam or a derivative thereof, the process comprising contacting a reactant comprising lysine or alpha aminocaprolactam with a catalyst and a gas comprising hydrogen gas, in the presence of a solvent. The catalyst may be provided on a support material, such as a transition metal.