| Patents for C07C 263 - Preparation of derivatives of isocyanic acid (3,065) |
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| 08/25/2004 | EP1449826A1 Process for the production of (poly)isocyanates in the gas phase |
| 08/25/2004 | CN1163470C Tolylenediamine and water mixture and use in preparation of toluene diisocyanate thereof |
| 08/24/2004 | US6781010 Obtained directly by the synthesis and thermolysis of the reaction product of the corresponding formamide and a diorganocarbonate |
| 08/18/2004 | CN1521162A Process for the synthesis of p-methyl cyclohexyl isocyanate |
| 08/11/2004 | CN1161331C Hydrazine derivatives |
| 08/05/2004 | US20040150123 Method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent |
| 08/04/2004 | EP1443040A1 Process for preparing 3-chloro-5-nitrotoluene |
| 08/04/2004 | CN1160319C Method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing reduced amout of chlorinated secondary products |
| 07/29/2004 | US20040147776 Multistage reaction of chlorination and deamination 2-methyl-5-nitro aniline to get 3-chloro-5-nitrotoluene |
| 07/28/2004 | EP1440990A1 Process for decreasing the acidic content of polymethylene-poly-phenyl-polyisocyanates mixtures |
| 07/28/2004 | EP1440056A1 Method for producing isocyanates |
| 07/28/2004 | EP1440055A1 Method for production of isocyanates |
| 07/28/2004 | EP1440054A1 Improved method for producing isocyanates |
| 07/28/2004 | EP1439904A1 A micro-engineered chemical reactor |
| 07/28/2004 | CN1516688A Method for producing isocyanates |
| 07/28/2004 | CN1515638A Method for preparing coating material by using composite based on isocyanic ester |
| 07/22/2004 | US20040143029 Produced by reacting tetralindiamine with phosgene |
| 07/15/2004 | WO2004058689A1 Method for the production of isocyanates |
| 07/08/2004 | WO2004056761A1 Method for separating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent |
| 07/08/2004 | WO2004056760A1 Method for producing (cyclo)aliphatic isocyanates |
| 07/08/2004 | WO2004056759A1 Method for the purification of isocyanates |
| 07/08/2004 | WO2004056758A1 Separation of a substance mixture consisting of hydrogen chloride and phosgene |
| 07/08/2004 | WO2004056757A1 Method for separating isocyanates out from a reaction mixture |
| 07/08/2004 | WO2004056756A1 Method for the continuous production of isocyanates |
| 07/08/2004 | DE10261191A1 Production of isocyanates by reacting amines with phosgene comprises using phosgene with a low hydrogen chloride content |
| 07/08/2004 | DE10261187A1 Verfahren zur Herstellung von Isocyanaten A process for the preparation of isocyanates |
| 07/08/2004 | DE10260027A1 Verfahren zur Abtrennung und Reinigung von Lösungsmittel von einem Reaktionsgemisch aus einer Isocyanatsynthese A process for the separation and purification of solvent from a reaction mixture of an isocyanate synthesis |
| 07/01/2004 | DE10260094A1 Verfahren zur Herstellung von (cyclo)aliphatischen Isocyanaten Process for preparing (cyclo) aliphatic isocyanates |
| 07/01/2004 | DE10260093A1 Verfahren zur Abtrennung von Isocyanaten aus einem Reaktionsgemisch Process for the separation of isocyanates from a reaction mixture |
| 07/01/2004 | DE10260092A1 Verfahren zur Reinigung von Isocyanaten A process for purifying isocyanates |
| 07/01/2004 | DE10260084A1 Auftrennung eines Stoffgemisches aus Clorwasserstoff und Phosgen Separation of a mixture of Clorwasserstoff and phosgene |
| 07/01/2004 | DE10260082A1 Verfahren zur kontinuierlichen Herstellung von Isocyanaten Process for the continuous preparation of isocyanates |
| 06/30/2004 | CN1509207A Distillation or reaction distillation comprising at least one toxic constituent |
| 06/24/2004 | US20040118672 Process for the purification of toluenediisocyanate incorporating a dividing-wall distillation column for the final purification |
| 06/15/2004 | US6750367 Tetralin isocyanates |
| 06/15/2004 | US6750365 Thermal dissociation of allophanates |
| 06/09/2004 | CN1503815A Process for the continous production of polyisocyanates |
| 06/03/2004 | WO2004037718A3 Method for producing chlorine from hydrochloric acid and integrated method for producing isocyanates |
| 06/02/2004 | CN1500776A Method for synthesis of aliphatic isocyanates from aromatic isocyanates |
| 06/02/2004 | CN1152073C Isocyanate compositions, coatings producing method using the same and coatings obtained |
| 05/27/2004 | DE10253803A1 Verfahren zur Herstellung von aliphatischen Isocyanaten aus aromatischen Isocyanaten A process for the preparation of aliphatic isocyanates, aromatic isocyanates |
| 05/26/2004 | CN1151119C Method for the production of methylendi (phenylamine) and methylenedi (phenylisocyanate) |
| 05/20/2004 | US20040097752 Method for synthesis of aliphatic isocyanates from aromatic isocyanates |
| 05/19/2004 | EP1420012A1 Process for the preparation of aliphatic isocyanates from aromatic isocyanates |
| 05/19/2004 | CN1496978A Method for purifying toluene vulcabond by recuperative distilling tower for final purifying |
| 05/19/2004 | CN1496977A Quenching method of gas reaction mixture in diamine gas phase phos-gasification process |
| 05/19/2004 | CN1496976A Method for preparing diphenyl methane series multiple isocyanic esters by non-neutralized polyamine of phos-gasification diphenyl methane series |
| 05/18/2004 | US6737554 Naphthalene and/ or 1-nitronaphthalene is reacted with nitric acid in the presence of a zeolite. |
| 05/18/2004 | CA2449465A1 Process for preparing aliphatic isocyanates from aromatic isocyanates |
| 05/13/2004 | US20040092701 Reacting aniline and formaldehyde in hydrogen chloride acid catalyst to produce diphenylmethane polyamine; phosgenation |
| 05/13/2004 | US20040091406 Method and device for reducing byproducts in the mixture of educt streams |
| 05/06/2004 | WO2004037718A2 Method for producing chlorine from hydrochloric acid and integrated method for producing isocyanates |
| 05/06/2004 | DE10250131A1 Verfahren zur Herstellung von Chlor aus Salzsäure A process for preparing chlorine from hydrochloric acid |
| 04/28/2004 | EP1413571A1 Process for the purification of toluenediisocyanate incorporating a dividing-wall distillation column for the final purification |
| 04/27/2004 | US6727341 Uniform mixing |
| 04/22/2004 | CA2445209A1 Process for the purification of toluenediisocyanate incorporating a dividing-wall distillation column for the final purification |
| 04/15/2004 | WO2004031132A1 Reprocessing of reaction material discharged from phosgenation reactors |
| 04/15/2004 | DE10246626A1 Selective halogenation of alkyl aromatic compounds, useful as intermediates for the production of plant protection agents, comprises insertion of halogenating agents in a micro-reactor under photochemical induction |
| 04/14/2004 | CN1488433A Zirconium oxide catalyst for synthesizing cyclohexyl menthyl formate, and preparing method and use thereof |
| 04/13/2004 | US6720455 Process for the production of polyisocyanates of the diphenylmethane series with a reduced color value |
| 04/08/2004 | US20040068137 Process for quenching a gaseous reaction mixture during the gas phase phosgenation of diamines |
| 04/08/2004 | DE10245584A1 Aufarbeitung von Reaktionsausträgen aus Phosgenierreaktoren Reprocessing of reactor effluents from Phosgenierreaktoren |
| 04/07/2004 | EP1208082B1 Improved method for producing monoisocyanates and oligoisocyanates |
| 04/01/2004 | WO2004026813A1 Moderate-pressure gas phase phosgenation |
| 04/01/2004 | DE10245704A1 Verfahren zum Quenchen eines gasförmigen Reaktionsgemisches bei der Gasphasenphosgenierung von Diaminen Process for quenching a gaseous reaction mixture in the gas-phase phosgenation of diamines |
| 04/01/2004 | DE10245703A1 Verfahren zur Herstellung von Polyisocyanaten der Diphenylmethanreihe durch Phosgenierung von nichtneutralisiertem Polyamin der Diphenylmethanreihe A process for preparing polyisocyanates of the diphenylmethane series by phosgenation of polyamine unneutralized the diphenylmethane |
| 03/31/2004 | EP1403248A1 Process for the preparation of diisocyanates by quenching the gas phase resulting from the phosgenation of the corresponding diamines |
| 03/31/2004 | EP1403242A1 Process for the preparation of polyisocyanates of the diphenylmethane series by phosgenation of non-neutralised polyamines of the diphenylmethane series |
| 03/31/2004 | EP1401802A1 Method for producing isocyanates |
| 03/31/2004 | EP0876335B2 Production of isocyanate using chlorine recycle |
| 03/30/2004 | CA2442464A1 Process for the production of polyisocyanates of the diphenylmethane series by phosgenation of non-neutralised polyamine of the diphenylmethane series |
| 03/24/2004 | EP1399252A1 Method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent |
| 03/24/2004 | CN1484632A Method for using a carbamoyl fluoride as fluorinating agent |
| 03/16/2004 | US6706913 Phosgenation of (cyclo)aliphatic diamines and triamines in the gas phase by accelerating the reactant gas flow |
| 03/11/2004 | US20040049069 Fluorinating a dichlorofluoromethyl or methoxy or a trichloromethyl or methoxybenzene isocyanate by reacting with HF to form the carbamoyl fluoride intermediate and forming a trifluoromethyl or methoxybenzene isocyanate |
| 03/10/2004 | EP1296753B1 Method and device for reducing byproducts in the mixture of educt streams |
| 03/03/2004 | CN1478769A Chemical synthesis method of 3,4-dichlorobenzene isocyanate |
| 02/26/2004 | DE10238995A1 Production of aromatic di-isocyanate e.g. used in polyurethane production, comprises gas-phase reaction of phosgene with diamine under moderate pressure in reactor with low phosgene hold-up |
| 02/19/2004 | WO2004014845A1 Integrated method for producing isocyanates |
| 02/18/2004 | CN1475480A Chemical synthesis method of aryl isocyanate |
| 02/18/2004 | CN1475479A Chemical synthesis method of isopropyl isocyanate |
| 02/12/2004 | DE10235476A1 Integriertes Verfahren zur Herstellung von Isocyanaten An integrated process for the preparation of isocyanates |
| 02/05/2004 | US20040024244 Integrated process for preparing isocyanates |
| 02/04/2004 | EP1385895A1 Process for the continuous production of polyisocyanates |
| 01/27/2004 | US6683204 Method for producing monoisocyanates and oligoisocyanates |
| 01/22/2004 | DE10228734A1 Verfahren zur Herstellung von Polyisocyanaten der Diphenylmethanreihe mit vermindertem Farbwert A process for preparing polyisocyanates of the diphenylmethane series with reduced color value |
| 01/21/2004 | CN1468845A Chemical synthesis of p-methoxyphenyl isocyanate |
| 01/21/2004 | CN1468837A Process for preparing polyisocyanic acid ester of diphenyl methane |
| 01/14/2004 | EP1379569A1 Method for producing mdi, especially 2,4'-mdi |
| 01/14/2004 | CN1467203A Process for the purification of mixtures of toluenediisocyanate |
| 01/14/2004 | CN1467202A Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column |
| 01/14/2004 | CN1467195A Process for producing 5-nitro-3,4-dihydro-1(2h)-naphthalinone, 1-5-naphthalenediamine and 1,5-naphthalene diisocyanate |
| 01/06/2004 | US6673960 Work-up of distillation residues from the synthesis of toluene diisocyanate |
| 01/02/2004 | EP1375561A1 Process for the preparation of polyisocyanates of the diphenylmethane serie having reduced colour |
| 01/01/2004 | US20040002579 Reacting aniline and formaldehyde in presence of acid catalyst; forming diamines; neutralization ; phosgenation |
| 12/18/2003 | US20030233013 Process for the purification of mixtures of toluenediisocyanate |
| 12/18/2003 | US20030230476 Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column |
| 12/17/2003 | EP1371636A1 Process for the purification of mixtures of toluenediisocyanate |
| 12/17/2003 | EP1371635A1 Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column |
| 12/17/2003 | EP1371634A1 Process for the purification of mixtures of toluenediisocyanate |