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Patent Searching and Data


Matches 201 - 250 out of 1,746

Document Document Title
WO/2008/064887A1
The invention relates to a method for preparing an intermediate compound for a diisocyanate, comprising reacting a diamine represented by the formula H2N-(CH2)0-Y-(CH2)p-NH2 wherein Y is selected from CH(OX) or CH(COOX), o and p each are...  
WO/2008/059953A1
Disclosed is a method for stably producing an isocyanate with high yield for a long time without using phosgene. This method for producing an isocyanate does not cause the problems involved in the prior art. Specifically disclosed is a m...  
WO/2008/058920A1
The invention relates to polyphenylenepolymethylene polyisocyanates (B) comprising (B1) the 2-ring product of polyphenylenepolymethylene polyisocyanate (B2) the 3-ring product of polyphenylenepolymethylene polyisocyanate (B3) the 4-ring ...  
WO/2008/055898A1
The invention relates to a method for producing isocyanates by reacting the corresponding amines with phosgene, optionally in the presence of at least one inert medium, in the gas phase. Said method is characterised in that n amine flows...  
WO/2008/055899A1
The invention relates to a method for producing isocyanates from the corresponding amines and phosgene by carrying out the reaction in the gas phase in at least one reaction zone and guiding the reaction mixture to at least one zone in w...  
WO/2008/055904A1
The invention relates to a method for producing isocyanates by reacting amines with phosgene in the gas phase in at least one reaction zone, the reaction mixture being guided to at least one zone in which at least one liquid is injected ...  
WO/2008/049783A1
A process for preparing isocyanates by phosgenating amines, wherein phosgene and amine are contacted in at least 2 mixing chambers connected in parallel.  
WO/2008/031755A1
The invention relates to processes for preparing isocyanates by splitting urethane, said process comprising the following process steps: (i) provision of synthesis gas from natural gas, coal, heavy oil or biomass gasification and product...  
WO/2008/025659A1
The invention relates to a multistage method for the continuous production of organic, distillable isocyanates, preferably diisocyanates, more preferred aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic ami...  
WO/2008/015134A1
The present invention relates to a process for preparing pentamethylene 1,5-diisocyanate, to pentamethylene 1,5-diisocyanate prepared in this way and to its use.  
WO/2008/006775A1
The object of the invention is a method for producing isocyanates by reacting amines with phosgene, characterized in that the amine, or a mixture of amine and a solvent in the form of an aerosol, is mixed with gaseous phosgene, and the a...  
WO/2007/134775A1
The present invention relates to a process for preparing chlorine from a gas containing hydrogen chloride and carbon monoxide, which comprises the step of catalysed oxidation of the carbon monoxide and, if applicable, further oxidizable ...  
WO/2007/134774A1
The invention relates to a method for producing organic isocyanates, whereby phosgene is produced by reacting CO with Cl2, the phosgene is reacted with organic amines to form the organic isocyanates, and the organic isocyanates are extra...  
WO/2007/131700A1
A process is described for preparing isocyanates. The process comprises at least the following steps: a) preparation of phosgene by reaction of chlorine with carbon monoxide, b) reaction of the phosgene formed in step a) with at least on...  
WO/2007/131638A1
The present invention relates to a method for the coupled production of chlorine and isocyanates, with the sulfuric acid which was used for both methods combined after its use, concentrated together, and flowing back into one or both met...  
WO/2007/117404A3
Methods are disclosed for the conversion of primary amines to other functional groups. The methods can be used to prepare chiral organic compounds, including organic alcohols and organic halides. The methods can be carried out by treatin...  
WO/2007/116761A1
Disclosed is a diphenylmethane isocyanate composition comprising a composition which is obtained by adding an alkylchlorosilane having 4-24 carbon atoms in total in the molecular structure to a diphenylmethane isocyanate having an acid d...  
WO/2007/115971A1
The invention provides a process for preparing polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), characterized in that the polyisocyanate a) used is at leas...  
WO/2007/088152A1
A process for preparing isocyanates by reacting olefins with isocyanuric acid in a solvent, the solvent being an ionic liquid. The ionic liquid is preferably selected from (A) salts of the general formula (I) in which n is 1, 2, 3 or 4, ...  
WO/2007/085534A1
The invention provides a process for simultaneously preparing 4,4'-diphenylmethanediamine and diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates, comprising the steps of a) preparing a mixture of diphenylmethaned...  
WO/2007/082818A1
The invention relates to a multi-stage method for continuously producing organic, distillable polyisocyanates, preferably diisocyanates, especially preferred aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organi...  
WO/2007/076998A1
The invention relates to a method for producing liquid, storage-stable isocyanate mixtures comprising carbodiimide (CD) and/or uretonimine (UI) groups, with low colour index. The invention also relates to the isocyanate mixtures obtained...  
WO/2007/051740A1
The invention relates to a process for preparing polyisocyanate mixtures containing at least 90% by weight, based on the polyisocyanate mixture, of a mixture a) of ai) diphenylmethane diisocyanate and aii) triphenylenedimethylene triisoc...  
WO/2007/049656A1
Disclosed are a novel fluoroadamantane derivative and a method for producing the same. Specifically disclosed are a method for producing a compound (2) shown below wherein a compound (1) shown below is reacted with an azide and then subj...  
WO/2007/039362A1
Process for preparing polyisocyanates involving the removal of a solvent-stream enriched in volatile, aromatic, non-isocyanate-group-containing contaminants from the polyisocyanate production process.  
WO/2007/036479A1
The present invention relates to a method for purifying residues containing isocyanates.  
WO/2007/031444A1
The invention relates to a multistage process for the continuous preparation of organic, distillable polyisocyanates, preferably of diisocyanates, particularly preferably of aliphatic or cycloaliphatic diisocyanates, by reacting the corr...  
WO/2007/028715A1
The invention relates to a method for producing isocyanates and a device suitable therefor and to the use thereof.  
WO/2007/020777A1
A process for producing an aliphatic isocyanate having an oxyalkylene group which comprises stepwise reacting either an aliphatic amine having an oxyalkylene group or a hydrochloride thereof with phosgene in an ester solvent in at least ...  
WO/2007/015852A2
A process for the preparation of aromatic carbamates comprising contacting one or more organic carbonates with an aromatic amine or urea in the presence of a catalyst and recovering the resulting aromatic carbamate product, characterized...  
WO/2007/014936A3
The invention relates to a method for producing diisocyanates from diamines and phosgene in the gas phase.  
WO/2007/014936A2
The invention relates to a method for producing diisocyanates from diamines and phosgene in the gas phase.  
WO/2007/015852A3
A process for the preparation of aromatic carbamates comprising contacting one or more organic carbonates with an aromatic amine or urea in the presence of a catalyst and recovering the resulting aromatic carbamate product, characterized...  
WO/2007/010996A1
An isocyanate has been widely used as a starting material for the production of a polyurethane material, a polyisocyanurate material or the like which is suitably applicable to the field of optical materials. Disclosed is a process for p...  
WO/2007/007887A2
A concentrating method and a concentrating system for concentrating polyisocyanate residues that can effectively concentrate polyisocyanate residues from crude polyisocyanate comprising polyisocyanate and polyisocyanate residues in a sho...  
WO/2007/007887A3
A concentrating method and a concentrating system for concentrating polyisocyanate residues that can effectively concentrate polyisocyanate residues from crude polyisocyanate comprising polyisocyanate and polyisocyanate residues in a sho...  
WO/2006/134137A1
The invention relates to a method for preparing isocyanate adducts, comprising the following steps a) the isocyanate adduct is reacted with pure ammonia, b) the reaction product arising in step a) is then prepared and, c) the formed amin...  
WO/2006/131381A1
The invention relates to a method for producing N-aryl carbamates (urethanes) and N-aryl isocyanates. According to said method, aromatic nitro compounds are subjected to a reductive carbonylation in the presence of carbon dioxide and org...  
WO/2006/130405A2
Process for preparing mixtures comprising diphenylmethane diisocyantes and polyphenylpolymethylene polyisocyanates having a higher HunterLab color (L) number by staged reaction of the corresponding mixtures of diphenylmethanediamines and...  
WO/2006/130405A3
Process for preparing mixtures comprising diphenylmethane diisocyantes and polyphenylpolymethylene polyisocyanates having a higher HunterLab color (L) number by staged reaction of the corresponding mixtures of diphenylmethanediamines and...  
WO/2006/109576A1
It is intended to provide an apparatus for continuously producing polyisocyanate by supplying polyamine and carbonyl chloride and quickly contacting them to inhibit an undesirable side reaction between polyamine and polyisocyanate so tha...  
WO/2006/109416A1
An apparatus for polyisocyanate production in which chlorine can be stably produced from hydrogen chloride generated as a by-product, carbonyl chloride can be stably reacted with a polyamine, and the by-product hydrogen chloride gas can ...  
WO/2006/103189A1
The invention relates to a method for producing isocyanates, comprising the following steps: (1) producing a raw MDA mixture by reacting aniline with formaldehyde; (2) separating the raw MDA mixture into MMDA and PMDA; (3a) phosgenating ...  
WO/2006/103188A1
The invention relates to a method for producing isocyanates comprising the following steps: (1) producing a raw MDA mixture by reacting aniline with formaldehyde, during which the reaction conditions are selected so that the resulting ra...  
WO/2006/095761A1
The invention provides a process for the production of polyisocyanate which permits effective utilization of hydrogen chloride formed in the production of polyisocyanate as a by-product and reduction in environment load, and equipment fo...  
WO/2006/072360A1
The invention relates to a method for largely eliminating chlorine compounds from organic isocyanates or isocyanate mixtures by contacting said isocyanates or isocyanate mixtures with a water-containing inert gas flow or an organic mater...  
WO/2006/070100A1
The invention concerns isocyanate compositions exhibiting good mixing properties. The compositions comprise for successive or simultaneous addition: an isocyanate sub-composition comprising by weight not more than 5 % of diisocyanate mon...  
WO/2006/058807A1
The invention relates to aliphatic, cycloaliphatic or (cyclo)aliphatic diisocyanates, in addition to a method for their production.  
WO/2006/048171A1
The invention relates to a method for producing polyisocyanates by reacting primary amines with phosgene in the presence of a solvent. Said method is characterised in that ionic liquids are used as the solvent.  
WO/2006/049264A1
There are provided a novel ethylenically unsaturated group-containing isocyanate compound, a process for producing the same, and a reactive monomer produced from the isocyanate compound, a reactive polymer and its use. The ethylenically ...  

Matches 201 - 250 out of 1,746