Abstract:
A process for preparing a lactam imide involves reacting together a lactam, a non-volatile carboxyl group-containing material, and an anhydride of a volatile carboxylic acid with the proviso that an appreciable amount of non-volatile carboxyl group-containing material and volatile carboxylic acid which is generated as the anhydride reacts are both present in the reaction mixture at the same time.
Abstract:
Five, six and seven member nitrogen-containing saturated heterocyclic compounds can be prepared by the catalytic hydrogenation/cyclization of beta, gamma and delta-cyanoesters. Applicants have discovered that this reaction is especially effective when it is conducted in the presence of catalysts comprising at least one of ruthenium and iron.
Abstract:
Disclosed is a process for separating 11-cyanoundecanoic acid, cyclohexanone and .epsilon.-caprolactam from a pyrolysis product obtained by pyrolyzing 1,1'-peroxydicyclohexylamine in the presence of steam at a temperature of 300.degree. to 1,000.degree. C. The pyrolysis product is first contacted with a mixture comprised of aqueous ammonia and at least one organic solvent selected from benzene, toluene and xylene, and the so prepared liquid is separated into the oily layer and the aqueous layer. On one hand, the oily layer is distilled to separate cyclohexanone therefrom. On the other hand, the aqueous layer is acidified to a pH of below 4.0 by adding thereto a mineral acid and maintained at a temperature of 40.degree. to 100.degree. C. to separate crude 11-cyanoundecanoic acid in molten form from the aqueous layer, and then, the separated crude molten 11-cyanoundecanoic acid is washed with hot water to extract .epsilon.-caprolactam therefrom.
Abstract:
A process for the production of .epsilon.-caprolactum from cyclohexanone oxime by rearrangement in the gaseous phase on a fluid-bed catalyst containing boron oxide, wherein residues from the distillation of cyclohexanone oxime are introduced into the reaction in liquid form, and wherein from 5 to 500 times their quantity of cyclohexanone oxime in vapor form and at least 50 times their quantity of inert gas are present during the reaction.
Abstract:
This invention concerns processes for preparing cyclic, five-membered ring, lactams through the carbonylation of allylic substrates in the presence of rhodium catalysts.
Abstract:
The present invention relates to storage stable multi-component mixtures containing:A. at least one compound selected from the group consisting of lactams and aza lactams;B. at least one compound selected from the group consisting of water, and difunctional acid-group-free organic compounds containing functional groups selected from the group consisting of hydroxyl, primary amino-, secondary amino, and sulfhydryl groups; andC. at least one acid selected from the group consisting ofI. mono- and poly-carboxylic acids,Ii. organic and inorganic acids of phosphorus,Iii. inorganic acids of boron, andIv. partially hydrolyzed antimonous and antimonic acid esters of polyhydroxyl compounds with molecular weights of from 62 to 600.
Abstract:
The present invention relates to a process for producing Epsilon -caprolactam which comprises bringing N-acetyl- Epsilon caprolactam into contact in a gaseous phase with an acid catalyst or basic catalyst in the presence of water vapor.
Abstract:
A METHOD FOR PREPARING CAPROLACTAM BY THE STEPS OF (1) NITRO-OXIDIZING CYCLOHEXENE TO 2-NITROCYCOLHEXANONE, (2) CLEAVING AND ESTERIFYING 2-NITROCYCLOHEXANONE WITH AN ALCOHOL TO FORM AN ALKYL 6-NITROHEXANOATE AND (3) CATALYTICALLY HYDROGENATING AND CYCLIZING THE NITROESTER TO CAPROLACTAM.
Abstract:
The use of certain complexes of cobalt and rhodium containing phosphine either either unsupported or supported, as catalysts for the cyclo-carbonylation reaction.
Abstract:
E-CAPROLACTAM IS PREPARED FROM A CYCLOHEXANE OXIDATION PRODUCT CONTAINING CYCLOHEXYL HYDROPEROXIDE AND OXIDATION BY-PRODUCTS INCLUDING 6-HYDROPEROXY-HEXANOIC ACID, WHICH HAS BEEN OBTAINED BY LIQUID PHASE OXIDATION OF CYCLOHEXANE, WITHOUT A METAL CATALYST, USING A MOLECULAR OXYGEN CONTAINING GAS, BY WASHING THE OXIDATION PRODUCT WITH WATER, SEPARATING THE RESULTING AQUEOUS PHASE CONTAINING 6-HYDROPEROXYHEXANOIC ACID AND HEATING THE ACID UNDER PRESSURE WITH AMMONIA AND HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST.