| Patents for C07C 263 - Preparation of derivatives of isocyanic acid (3,065) |
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| 12/17/2003 | EP1371633A1 Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column |
| 12/16/2003 | US6664415 Thermal decomposition of diisocyanate using amine |
| 12/14/2003 | CA2431441A1 Process for the purification of mixtures of toluenediisocyanate |
| 12/14/2003 | CA2431439A1 Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column |
| 12/11/2003 | US20030229252 Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1-5-naphthalenediamine and 1,5-naphthalene diisocyanate |
| 12/10/2003 | EP1369412A1 Process for the preparation of 5-nitro-3,4-dihydro-1(2H)-naphthalenone, 1,5-naphthalendiamine and 1,5-naphthalendiisocyanate |
| 12/04/2003 | WO2003099770A1 Method for producing isocyanates |
| 11/26/2003 | CN1458150A Process for preparing gas isocyanate |
| 11/20/2003 | WO2003095419A1 Tetralin isocyanates |
| 11/20/2003 | US20030216597 Process for the production of isocyanates in the gas phase |
| 11/19/2003 | EP1362847A2 Process for the preparation of isocyanates in the gas phase |
| 11/13/2003 | US20030212160 Tetralin isocyanates |
| 11/12/2003 | CN1127475C Method for decomposing solid leavings |
| 11/06/2003 | WO2003068359A3 Reaction column in a special combination with a natural circulation evaporator |
| 10/29/2003 | EP1086075B1 Method for treating distillation residues from the synthesis of toluene diisocyanate |
| 10/28/2003 | US6639102 Process for producing polyisocyanates of the diphenyl methane series having a reduced color value |
| 10/28/2003 | US6639101 Isocyanate production procedure |
| 10/16/2003 | WO2003084921A1 Reactor for thermally cracking monofunctional and polyfunctional carbamates |
| 10/14/2003 | CA2082786C A process for the production of polyisocyanates |
| 10/09/2003 | WO2003082803A1 Process for the production of diaminodiphenylmethane and its higher homologues |
| 10/08/2003 | EP1349831A2 Method for using a carbamoyl fluoride as fluorinating agent |
| 10/07/2003 | US6630599 Process for preparing derivatives of isopropenyl-α, α-dimethylbenzyl isocyanate |
| 10/01/2003 | EP1073628B1 Method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing a reduced amount of chlorinated secondary products and with a reduced iodine colour index |
| 09/24/2003 | CN1443796A Preparation method of polyisocyanate of diphenyl methane series with low color value |
| 09/18/2003 | US20030176626 Process for producing polyisocyanates of the diphenyl methane series having a reduced color value |
| 09/17/2003 | EP1344766A2 Process for the preparation of polyisocyanates of the diphenylmethane series having reduced colour |
| 09/17/2003 | CN1442401A Method of preparing dinitronaphthalene isomer mixture having high percentage 1,5-dinitronaphthalene |
| 09/13/2003 | CA2421395A1 Process for producing polyisocyanates of the diphenyl methane series having a reduced color value |
| 09/12/2003 | WO2003074477A1 Method for producing isocyanates |
| 09/11/2003 | US20030171627 Naphthalene and/ or 1-nitronaphthalene is reacted with nitric acid in the presence of a zeolite. |
| 09/10/2003 | EP1342713A1 Method for producing a dinitronaphthalene-isomer mixture having an increased 1,5-dinitronaphthalene proportion |
| 09/04/2003 | US20030166965 Reacting amines with phosgene |
| 08/28/2003 | US20030162995 Integrated process for the preparation of aromatic isocyanates and procedures for effecting the relative intermediate phases |
| 08/21/2003 | WO2003068559A1 Dump body for heavy vehicles |
| 08/21/2003 | WO2003068359A2 Reaction column in a special combination with a natural circulation evaporator |
| 08/21/2003 | US20030158328 Protective coatings; hardness; solvent resistance; polyetherurethane copolymers |
| 08/20/2003 | EP1187808B1 Light isocyanates, method for producing them and use thereof |
| 08/20/2003 | CN1436772A Isocyanate preparing process |
| 08/06/2003 | CN1434743A Method and device for the continuous production of organic mono of polyisocyanates |
| 08/06/2003 | CN1434742A Method for reducing byproducts in the mixture of educt trreams |
| 08/05/2003 | CA2067867C Preparation of polymethylene polyphenyl polyisocyanate |
| 07/30/2003 | CN1432563A Prepn process of carbamate and prepn process of isocyanate |
| 07/29/2003 | CA2096501C Process for the preparation of aromatic diisocyanates |
| 07/22/2003 | CA2069384C A process for the preparation of liquid storable organic isocyanates containing carbodimide and/or uretone imine groups and their use for the preparation of polyurethane plastics |
| 07/03/2003 | US20030125579 Aliphatic amines, alicyclic amines, and aralkyl aminea are reacted with alkylaryl carbonates to produce carbamates which are thermally decomposed to produce isocyanates |
| 07/02/2003 | EP1323708A1 Method for producing carbamates and method for producing isocyanates |
| 06/25/2003 | CN1425647A Improving method for preparing (poly) isocyanate by gas phase |
| 06/19/2003 | US20030114705 Process for the production of (poly)isocyanates in the gas phase |
| 06/18/2003 | EP1319655A2 Improved process for the preparation of (poly-)isocyanates in the gas phase |
| 06/17/2003 | CA2084957C Process for preparing polyamines for lighter color polyisocyanate based foam |
| 06/10/2003 | US6576788 Method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing a reduced amount of chlorinated secondary products and with a reduced iodine color index |
| 06/05/2003 | WO2003045900A1 Production of isocyanates in the gaseous phase |
| 05/22/2003 | WO2003042170A1 Method for production of isocyanates |
| 05/21/2003 | CN1419538A Integrated process for the preparation of aromatic isocyanates and procedures for effecting the relative intermediate phases |
| 05/08/2003 | WO2003037502A1 A micro-engineered chemical reactor |
| 05/02/2003 | EP1053222B1 Method for the production of methylenedi(phenylamine) and methylenedi(phenyl isocyanate) |
| 05/01/2003 | WO2003035607A1 Method for producing isocyanates |
| 05/01/2003 | WO2003035606A1 Improved method for producing isocyanates |
| 04/23/2003 | EP0993442B1 Hydrazine derivatives |
| 04/15/2003 | CA2095188C Process for the production of polyamine mixtures of the poly-amino-polyaryl-polymethylene series |
| 04/10/2003 | US20030069441 Phosgenation of (cyclo)aliphatic diamines and triamines in the gas phase by accelerating the reactant gas flow |
| 04/02/2003 | EP1296753A1 Method and device for reducing byproducts in the mixture of educt streams |
| 04/02/2003 | CN1406925A Production of low color diphenyl methane polyisocyanate |
| 03/26/2003 | CN1406224A Process for the preparation of organic polyisocyanates |
| 03/25/2003 | US6538158 Process for preparing 1,4-diaminonaphthalene and/or 1,5-diaminoNaphthalene |
| 03/20/2003 | US20030055282 Decomposing polycarbamates into alcohols and at least a portion of either diisocyantes or monoisocyanatomonocarbamates are removed during decomposing |
| 03/12/2003 | EP1289649A1 Method and device for the continuous production of organic mono or polyisocyanates |
| 03/06/2003 | US20030045745 Reacting aniline and formaldehyde in the presence of an acidic catalyst, neutralizing with a base at a temperature of more than 110 degrees C. and phosgenating; intermediates for polyurethane |
| 03/05/2003 | EP1288190A2 Process for the preparation of polyisocyanates of the diphenylmethane series having reduced colour |
| 02/25/2003 | CA2110235C At least partially blocked organic polyisocyanates, a process for their preparation and their use in coating compositions |
| 02/24/2003 | CA2399483A1 Process for the production of polyisocyanates of the diphenylmethane series with a reduced color value |
| 02/19/2003 | CN1101808C Method for producing organic diurethanes and/or polyurethanes and their usein prodn. of di-and/or polyisocyanates |
| 02/12/2003 | CN1396153A Method for preparing (cycle) fatty isocyanate |
| 02/12/2003 | CN1396152A Method for preparing (cycle) fatty isocyanate |
| 02/05/2003 | CN1394851A Synthesis mothod of 1,5-naphthalene diisocyanate |
| 01/22/2003 | CN1099410C Process for preparing 2,2'-dimethyl-3,3'5,5' triphenyl methane tetraiso-cyanate |
| 01/16/2003 | US20030013909 Process for preparing (cyclo)aliphatic isocyanates |
| 01/15/2003 | EP1275640A1 Process for the preparation of (cyclo)aliphatic isocyanates |
| 01/15/2003 | EP1275639A1 Process for the preparation of (cyclo)aliphatic isocyanates |
| 01/02/2003 | EP1270544A1 Process for the preparation of methylenedi(phenylamine) and methylenedi(phenylisocyanate) |
| 01/01/2003 | CN1388116A One kind of 4-cyano phenyl isocyanate and its chemical synthesis |
| 12/27/2002 | WO2002102763A1 Method for producing isocyanates |
| 12/26/2002 | US20020198408 Process for preparing 1,4-diaminonaphthalene and/or 1,5-diaminonaphthalene |
| 12/19/2002 | WO2002100915A1 Process for the continuous production of polyisocyanates |
| 11/28/2002 | WO2002094432A1 Method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent |
| 11/28/2002 | WO2002055487A3 Method for using a carbamoyl fluoride as fluorinating agent |
| 11/28/2002 | DE10124386A1 Distillation column for mixtures, with toxic component, has packing with variable inner geometry to form lower bubbling layer with dispersed gas phase and an upper film layer with a continuous gas phase |
| 11/27/2002 | EP1259480A1 Process for the preparation of organic polyisocyanates |
| 11/26/2002 | US6486346 Process for the preparation of durene diisocyanate |
| 11/14/2002 | DE10122234A1 Verfahren zur Herstellung von 1,4-Diaminonaphthalin und/oder 1,5-Diaminonaphthalin A process for preparing 1,4-diaminonaphthalene and / or 1,5-diaminonaphthalene |
| 11/13/2002 | EP1256567A1 Process for the preparation of 1,4-diaminonaphthalene and/or 1,5-diaminonaphthalene |
| 11/13/2002 | EP1255728A1 Integrated process for the preparation of aromatic isocyanates and procedures for effecting the relative intermediate phases |
| 11/13/2002 | EP0877731B1 Aqueous emuslions comprising fluorocarbon-containing isocyanate derivatives as soil-resist agents |
| 11/07/2002 | US20020165333 Prepared by living anion polymerization with protective metal ions to prevent depolymerization, an tetrahydrofuran, and an initiator high vacuum at extremely low temperature; weight control; narrow weight distribution; optics; liquid crystals |
| 10/31/2002 | US20020161257 Thermal dissociation of allophanates |
| 10/31/2002 | US20020161160 Preparation of organic polyisocyanates |
| 10/31/2002 | DE10209305A1 Thermal decomposition of allophanates comprises stripping gaseous decomposition products from the reaction vessel with an inert carrier gas or vapor and condensing them |
| 10/29/2002 | US6472564 Process for the preparation of toluylene diisocyanate, specific mixtures of toluylene diamine and water, and the use of toluylene diamine and water mixtures to prepare toluylene diisocyanate |
| 10/03/2002 | US20020143191 Novel stabilized activated derivatives of carbamic acid, their process of preparation and their use for the preparation of ureas |
| 09/19/2002 | US20020132953 Reacting formaldehyde with aniline in presenc eof acid catalyst |