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Matches 251 - 300 out of 1,647

Document Document Title
WO/2004/031132A1
The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in a reactor and a production plant for carrying out said method. The discharged reaction material is provided in the form of a suspensi...  
WO/2004/026813A1
The invention relates to a method for producing aromatic diisocyanates by reacting phosgene with diamines in the gas phase. The reaction is carried out in a reaction chamber at moderate pressures, i.e. the pressure in said reaction chamb...  
WO/2004/014845A1
The invention relates to a method for producing organic isocyanates, said method consisting of the following steps: (a) a first partial quantity of chlorine containing < 400 ppm of free or bonded bromine and iodine is prepared; (b) a sec...  
WO/2003/099770A1
The invention relates to a continuous method for producing isocyanates by reacting primary amines with phosgene. The invention is characterized in that the reaction is carried out in a cascade of at least two tubular reactors and, after ...  
WO/2003/095419A1
The present invention relates to novel aromatic isocyanates obtained by partially hydrogenating naphthalene as well as the processes for preparing the same, and to their use as an isocyanate component in the production of polyurethanes.  
WO2003068359A3
The invention relates to an arrangement for carrying out chemical reactions, comprising at least one distillation column and/or at least one container, in addition to at least one circulation evaporator, which are connected to one anothe...  
WO/2003/084921A1
Disclosed is a rector for thermally cracking monofunctional and/or polyfunctional carbamates into the corresponding isocyanate and hydroxyl components in the liquid phase, comprising devices which feed heat into the reactor. Said devices...  
WO/2003/082803A1
A method of preparing diaminodiphenylmethane and higher homologues thereof from aniline and formaldehyde in the presence of heterogeneous solid acid catalysts selected from (a) delaminated zeolites and/or (b) metal silicate catalysts hav...  
WO/2003/074477A1
The invention relates to a method for producing isocyanates made from carbamic acid esters, wherein (i) a mixture containing a single or multiple functional carbamic acid ester is continually introduced into a fission reactor or a cascad...  
WO/2003/068559A1
A dump body (10) for heavy vehicles comprises a casing with a base or bed (12) surmounted by a front wall (13) and two sides (14a, 14b) and which can be raised by any appropriate linear actuator, and a rear part (16). At the front portio...  
WO/2003/068359A2
The invention relates to an arrangement for carrying out chemical reactions, comprising at least one distillation column and/or at least one container, in addition to at least one circulation evaporator, which are connected to one anothe...  
WO/2003/045900A1
The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in the gaseous phase. Said method is characterized in that the reaction of amine and phosgene occurs in a reaction channel, the internal...  
WO/2003/042170A1
The invention relates to a method for producing isocyanates by the reaction of the corresponding primary amines with phosgene in an inert solvent, whereby 0.01 to 50 mole % of a sulphonic acid amide is used, based on the total amount of ...  
WO/2003/037502A1
A chemical reactor and method of using the same. The reactor comprises first and second micro−engineered discrete flow passages (11, 15) for receiving chemical fluids. The first fluid passage (11) receives a first chemical fluid in whi...  
WO/2003/035606A1
The invention relates to a method for producing isocyanates by reacting the corresponding primary amines with phosgene in an inert solvent. According to said method, between 0.01 and 50 mol. % of a phosphine oxide is used, in relation to...  
WO/2003/035607A1
The invention relates to a method for producing isocyanates by reacting the corresponding primary amines with phosgene in an inert solvent, while using 0.01 to 50 mole percent of a sulfoxide, a sulfone or mixtures thereof, based on the t...  
WO/2002/102763A1
The invention relates to a method for producing isocyanates by reacting primary amines with phosgene, and using isocyanate as the solvent. The inventive method is characterized in that a portion or the entire quantity of the isocyanate u...  
WO/2002/100915A1
A process for the continuous production of a polyisocyanate involving feeding a diisocyanate and an adduct containing at least one active hydrogen atom into a mixing zone, reacting the feedstocks to produce a polyisocyanate in an incline...  
WO2002055487A3
The invention concerns a method for using a carbamoyl fluoride as fluorinating agent. Said method consists in treating a derivative bearing a halogen-containing carbon, with a carbamoyl fluoride at a temperature not less than 70 DEG C an...  
WO/2002/094432A1
The invention relates to a method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent, whereby the method is carried out in a column provided with an ordered packing comprisin...  
WO/2002/070581A1
The invention relates to a method for producing MD1, comprising the following steps: A) aniline and formaldehyde are made to react in the presence of an acid to form methylene(diphenyldiamene) and polymethylene polyphenylene polyamine, t...  
WO/2002/055487A2
The invention concerns a method for using a carbamoyl fluoride as fluorinating agent. Said method consists in treating a derivative bearing a halogen-containing carbon, with a carbamoyl fluoride at a temperature not less than 70 °C and ...  
WO/2002/050020A1
The invention relates to a method for producing isocyanates, whereby at least one compound containing carbamate groups is converted into an isocyanate at a reaction temperature above the boiling point of an isocyanate thus arising. The r...  
WO2002024634A3
A phosgene-free process for producing organic isocyanates reacts an organic formamide with a diorganocarbonate and thermolyzing the reaction product to obtain the corresponding organic isocyanate. Byproducts may be cycled back to the rea...  
WO2002012176A3
The invention relates to a novel method for removing chlorine compounds from organic isocyanates or isocyanate mixtures by carrying out a treatment and an extraction using near-critical and/or supercritical fluids.  
WO/2002/024634A2
A phosgene-free process for producing organic isocyanates reacts an organic formamide with a diorganocarbonate and thermolyzing the reaction product to obtain the corresponding organic isocyanate. Byproducts may be cycled back to the rea...  
WO/2002/012176A2
The invention relates to a novel method for removing chlorine compounds from organic isocyanates or isocyanate mixtures by carrying out a treatment and an extraction using near-critical and/or supercritical fluids.  
WO/2002/008173A1
A process for the manufacture of polyisocyanate particles comprising the steps of: (i) melting the polyisocyanate; (ii) forming the molten polyisocyanate paste into drops on a cooling surface; (iii) forming solid pastilles by cooling the...  
WO/2002/002217A1
The invention relates to a method for mixing educt streams (1, 2; 5) in order to produce a product stream (10), using a mixer configuration (15, 16) that is provided with a number of educt feeding sites. An excess component stream of an ...  
WO/2001/091898A1
The invention relates to a method for mixing educt streams in a mixer (13) for phosgenating amines. According to said method, the reaction product (3) is led off in a closed manner and the educt streams (1, 2) contain organic solvents. T...  
WO/2001/064628A1
Process for the preparation of organic polyisocyanates by decomposing the corresponding organic polycarbamates into organic polyisocyanates and alcohols, characterised in that the alcohol and at least part of either the diisocyanates or ...  
WO/2001/056977A1
Integrated process for the preparation of aromatic isocyanates comprising: the reaction between an aromatic amine and an organic carbonate in the presence of a catalyst selected from organic and inorganic salts of a metal selected from Z...  
WO/2001/017951A1
The invention relates to a method for producing aliphatic, cycloaliphatic, araliphatic and aromatic monoisocyanates and oligoisocyanates by phosgenating the corresponding primary amines at normal pressure. The inventive method is charact...  
WO/2001/002347A1
The invention concerns a method for dehydrogenofluorination for transforming an aromatic carbamoyl fluoride into the corresponding isocyanate. Said method is characterised in that it consists in subjecting said carbamoyl fluoride to a te...  
WO/2001/000569A1
The invention relates to light isocyanates, to a method for producing light isocyanates and to their use in urethane compounds, especially in polyurethane, for example polyurethane foams.  
WO/2000/042009A1
The invention concerns the use of isocyanates obtained from amino acid derivatives for preparing and optionally isolating stable activated carbamic acid derivatives, or stable activated carbamates.  
WO/2000/040524A1
Disclosed is a method of preparing an aromatic compound having general formula (I) where R is CF¿3?, OCF¿3?, OC¿2?F¿5?, CN, NCO, or COCl, m is 0, 1, or 2, n is 0, 1, or 2, q is 1 or 2, and q+m+n is an integer from 1 to 5. A vapor is ...  
WO/1999/065868A1
The invention relates to a method for treating distillation residues from the synthesis of toluene diisocyanate by reacting the distillation residues with water. The invention is characterized in that the TDI distillation residues are re...  
WO/1999/054289A1
The invention relates to a 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 ...  
WO/1999/048863A1
The present invention relates to the use of 3.5-Di.tert.-butyl-4-hydroxy-phenyl propionic acid esters for stabilisation of organic polyisocyanates.  
WO/1999/047493A1
Organic carbamates are prepared by the reaction of organic amines (preferably aromatic polyamines) with heteroatom-substituted alkyl carbonates. Said carbamates can be thermolysed into the corresponding isocyanates.  
WO/1999/041218A1
The present invention relates to a method of making alpha-methylstyrene dimers by combining a cobalt catalyst, a free-radical initiator and an alpha-methylstyrene monomer, in an inert atmosphere, to form a mixture. The mixture is heated ...  
WO/1999/040059A1
The invention relates to a method for the production of methylenedi(phenylamine) by reacting aniline with formaldehyde in the presence of acid catalysts. The method is characterized in that aniline and optionally an acid catalyst are tre...  
WO/1999/001428A1
Hydrazine derivatives of formula (I) wherein Y signifies CO or SO¿2?; R?1¿ signifies lower alkyl, lower alkenyl, lower cycloalkyl, lower cycloalkyl-lower alkyl, aryl or aryl-lower alkyl; R?2¿ signifies lower alkyl, halo-lower alkyl, a...  
WO/1998/056758A1
Process for the production of organic isocyanates comprising the following steps: (1) reacting an amine compound with an organic carbonate in the presence of a catalyst and an organic solvent; (2) removing the catalyst; (3) thermally dec...  
WO/1998/054129A1
Method for the preparation of polymeric isocyanates by decomposing polymeric ureas of the formula: R?1�(NHCONR?2�R?3�)�x? wherein x is at least 2, R?1� is an organic radical of valency x and R?2� and R?3� are monovalent org...  
WO/1998/054128A1
Method for the preparation of aromatic monomeric or polymeric isocyanates by decomposing aromatic monomeric or polymeric carbamates of the formula R?1�(NHCOOR?2�)�x? wherein x is at least 1, R?1� is an aromatic radical of valency...  
WO/1998/025888A1
Isocyanates are prepared by the 'cold-hot phosgenation' of primary amines which are not readily dissolved in chlorobenzene and/or o-dichlorobenzene. According to this process phosgene is dissolved in a solvent (A) consisting of chloroben...  
WO/1998/025680A1
The invention concerns a method of separating organic compounds by single- or multi-stage suspension crystallization, each stage consisting of a crystallizer, optionally a crystallizer vessel, and a filter (7) for separating the liquid p...  
WO/1998/025889A1
The invention concerns a method of separating a crystallizable organic compound from a liquid compound mixture by means of a single- or multi-stage suspension crystallization method, the crystals behind the final stage being separated by...  

Matches 251 - 300 out of 1,647