| Patents for C07D 201 - Preparation, separation, purification, or stabilisation of unsubstituted lactams (2,192) |
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| 12/09/1986 | CA1215049A1 Process for preparing lactam magnesium halides |
| 11/25/1986 | US4625023 Selective conversion of aliphatic and aromatic aminonitriles and/or dinitriles into lactams |
| 10/15/1986 | EP0197408A2 A method of preparing omega -lactams, in particular caprolactam |
| 09/09/1986 | US4610768 Lactam purification |
| 08/19/1986 | US4606858 Adjustment of ph, then solvent extraction with toluene |
| 08/12/1986 | US4605762 Depolymerization of condensation polymers |
| 07/08/1986 | US4599199 Obtaining caprolactam from epsilon-aminocaproic acid |
| 04/15/1986 | US4582642 Steam distillation in absence of any depolymerization agents |
| 01/21/1986 | CA1199634A1 .epsilon.-CAPROLACTAM-BLOCKED DIISOCYANATES AND POWDER COATINGS UTILIZING THE BLOCKED DIISOCYANATES |
| 01/07/1986 | US4563308 Recovery of caprolactam from caprolactam-containing distillation residue |
| 12/24/1985 | US4560760 Process for the preparation of a lactam |
| 11/12/1985 | CA1196642A1 Vinyl carboxylic acid derivatives, their production and use |
| 08/28/1985 | EP0152843A2 A method of purifying caprolactam |
| 08/14/1985 | EP0151440A2 Process for the preparation of caprolactam from epsylon-aminocaproic acid |
| 08/14/1985 | EP0151400A2 Hair dyeing compositions with picramic acid derivatives, new picramic acid derivatives and process for preparing same |
| 08/07/1985 | EP0150295A2 Selective production of N-substituted amides by use of CU(O)/metallic oxides catalyst compositions |
| 08/01/1985 | WO1985003222A1 Hair colorant with picramic acid derivatives, new picramic acid derivatives and production process thereof |
| 07/09/1985 | CA1190219A1 Process for the manufacture of crystalline sodium cefoperazone |
| 07/09/1985 | CA1190203A1 Process for deactivating catalytically active sites on the external surface of crystalline silicate catalysts, as well as crystalline silicate catalysts the catalytic properties of the external surface of which differ from those of the pore surface |
| 05/21/1985 | US4518602 Vinyl carboxylic acid derivatives, their production and use as inhibitors of thromboxane synthetase |
| 04/24/1985 | EP0138241A2 Recovery of caprolactam from caprolactam-containing distillation residue |
| 04/24/1985 | EP0138151A2 Process for the preparation of N-(C1-C4-alkyl)-caprolactam |
| 04/17/1985 | EP0137124A2 Removal of light impurities from caprolactam by distillation with water |
| 04/02/1985 | US4508646 Process for the preparation of a catalyst useful for anionic lactam polymerization |
| 02/19/1985 | CA1182775A1 Process for the purification of n-caprolactam |
| 01/22/1985 | CA1181398A1 Process for producing cyanovaleric esters and caprolactam |
| 12/04/1984 | CA1178918A1 Process for the purification of 2-pyrrolidone |
| 09/18/1984 | US4472516 Alkali metal salt deactivating solution |
| 09/11/1984 | US4470928 Reducing 5-cyanovaleric acid obtained from adipic acid, adiponitrile and alcohol; lactamization |
| 08/22/1984 | EP0116527A2 Process for preparing lactam magnesium halides |
| 07/03/1984 | US4458070 Storage stability |
| 07/03/1984 | US4457807 Process for the purification of ε-caprolactam |
| 06/27/1984 | EP0111997A2 Vinyl carboxylic acid derivatives, their production and use |
| 03/20/1984 | US4438034 From lactam, magnesium, and halogenated hydrocarbon; one step |
| 02/22/1984 | EP0101170A1 Process for the manufacture of sodium cefoperazone |
| 01/18/1984 | EP0098690A2 Vinyl carboxylic acid derivatives, their production and use |
| 12/13/1983 | US4420620 Amination, hydrogenation, metal catalysts |
| 11/29/1983 | CA1157857A1 Process for obtaining caprolactam by cleaving caprolactam oligomers |
| 11/22/1983 | US4416818 Acylation with ester of trichloroacetic acid |
| 11/15/1983 | CA1157020A1 Recovery of caprolactam from nylon 6 oligomers |
| 08/24/1983 | EP0086543A1 Crystalline silicate catalysts with deactivated external surface, and process for its deactivation |
| 08/02/1983 | CA1151138A1 Catalyst and process for the production of pyrrolidone |
| 07/19/1983 | CA1150229A1 Process for the preparation of an optionally c-substituted 2-pyrrolidone, and a catalyst for use in this preparation |
| 07/12/1983 | US4393002 ε-Caprolactam blocked diisocyanates |
| 06/28/1983 | CA1148960A1 Process for the preparation of a 2-pyrrolidone |
| 06/01/1983 | EP0080240A1 Process for the preparation of a lactam |
| 05/31/1983 | CA1147340A1 Fungicidal 3-(n-acyl-n-arylamino)- and 3- (n-thionoacyl-n-arylamino)-gamma- butyrolactones and gamma-thiobutyrolactones |
| 05/17/1983 | US4384125 Process for the purification of 2-pyrrolidone |
| 03/30/1983 | EP0075372A1 Process for the preparation of a lactam |
| 01/04/1983 | CA1138865A1 Purification of caprolactam |
| 12/28/1982 | CA1138447A1 PROCESS FOR PREPARING .omega.-LACTAMS, IN PARTICULAR CAPROLACTAM |
| 11/24/1982 | EP0065168A1 Process for the purification of epsilon caprolactam |
| 11/23/1982 | US4360461 Process for obtaining caprolactam by cleaving caprolactam oligomers |
| 11/16/1982 | US4359421 Rearrangement of cyclohexanone oxime in the presence of a zeolite |
| 11/16/1982 | CA1135693A1 Process for the preparation of heterocyclic compounds |
| 10/26/1982 | US4356124 Catalytic hydrogenation/amination of a heterocycle anhydride |
| 09/28/1982 | CA1132546A1 Method for the prufication of raw caprolactam which contains amides and other by-products |
| 09/21/1982 | US4350630 Continuous extraction of caprolactam from an aqueous solution containing caprolactam and its oligomers |
| 09/14/1982 | US4349473 Process for the preparation of ω-lactams, in particular caprolactam |
| 09/14/1982 | US4349460 Catalyst for the preparation of polylactams |
| 07/28/1982 | EP0056698A2 Process for making epsilon-caprolactam |
| 07/06/1982 | US4338262 Carboxylic acid derivatives |
| 05/04/1982 | US4328154 Process for the purification of raw caprolactam |
| 04/27/1982 | US4326925 Process for the purification of caprolactame |
| 04/20/1982 | US4325872 Process for the preparation of a 2-pyrrolidone |
| 03/31/1982 | EP0048340A1 Recovery of caprolactam from nylon 6 oligomers |
| 03/30/1982 | CA1120933A1 Process for teh preparation of a 2-pyrrolidone |
| 03/16/1982 | US4319881 Polyoxyalkylene glycol-lactam complex |
| 02/24/1982 | EP0046183A1 Process for the production of caprolactam by decomposition of caprolactam oligomers |
| 02/09/1982 | US4314940 Method for the purification of raw caprolactam |
| 01/20/1982 | EP0043924A1 Process for the continuous extraction of caprolactam from aqueous solutions containing aprolactam and its oligomers |
| 01/19/1982 | US4311642 Recovery of caprolactam from nylon 6 oligomers |
| 12/16/1981 | EP0041751A1 Process for the purification of 2-pyrrolidone |
| 11/17/1981 | US4301073 Purification of caprolactam |
| 11/10/1981 | CA1112396A1 Continuous polymerization of 2-pyrrolidone |
| 10/06/1981 | US4293494 Method for the purification of raw caprolactam which contains amides and other by-products |
| 08/25/1981 | CA1107731A1 PROCESS FOR SEPARATING 11-CYANOUNDECANOIC ACID, CYCLOHEXANONE AND .epsilon.-CAPROLACTAM |
| 07/21/1981 | US4279820 Hydrogenating a succinonitrile in the prescence of ammonia and a nickel catalyst |
| 07/08/1981 | EP0031625A1 Process for the preparation of a 2-pyrrolidone |
| 06/30/1981 | US4276215 Purification of pyrrolidone |
| 06/03/1981 | EP0029804A1 Process for the printing or pad-dyeing of textile materials of cellulosic fibres or mixtures thereof with synthetic fibres, as well as printing pastes or padding liquors for carrying out this process |
| 05/19/1981 | US4268440 Vaporization of cyclohexanone oxime over boron trioxide fluidized bed |
| 05/19/1981 | CA1101429A1 Process for preparing 2-pyrrolidone |
| 05/12/1981 | US4267105 Produced by the catalytic rearrangement of cyclohexanone oxime |
| 05/12/1981 | CA1100961A1 PROCESS FOR THE RECOVERY OF .epsilon.-CAPROLACTAM FROM A REACTION MIXTURE OF .epsilon.-CAPROLACTAM AND SULPHURIC ACID |
| 04/28/1981 | US4264501 Process for the recovery of pyrrolidone-2 |
| 04/21/1981 | US4263175 Catalyst for the production of pyrrolidone |
| 04/15/1981 | EP0027022A1 Production of five-membered nitrogen-containing saturated heterocyclic compounds and catalyst suitable therefor |
| 04/01/1981 | EP0025887A1 Sulfonylcarboxylic acid derivatives |
| 03/31/1981 | CA1098480A1 Purification of pyrrolidone |
| 03/24/1981 | US4257950 Continuous preparation of ε-caprolactam by Beckmann rearrangement |
| 02/11/1981 | EP0023751A1 Process for producing five, six or seven membered saturated nitrogen containing heterocyclic compounds |
| 02/10/1981 | US4250093 Hydrogenation-cyclization of b-, g-, or d-cyano esters using a ruthenium or iron metal catalyst |
| 02/03/1981 | US4248782 Preparation of ε-caprolactam by catalytic rearrangement of cyclohexanone-oxime |
| 02/03/1981 | US4248781 Purification of crude caprolactam |
| 02/03/1981 | CA1095040A1 N-substituted lactams |
| 01/27/1981 | US4247666 Caprolactam-capped xylylene diisocyanate |
| 01/14/1981 | EP0022292A1 Process for the preparation of a 2-pyrrolidone |
| 01/14/1981 | EP0022161A1 Process for the purification of caprolactam |
| 01/13/1981 | CA1093564A1 Process for producing 2-pyrrolidone |