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US20120108844 METHOD OF MEASURING ENTRY OF WATER INTO PHOSGENE-CONDUCTING PLANTS  
The invention relates to a method of measuring entry of water and resulting corrosion in plants for producing isocyanates by reacting phosgene with one or more primary amines in a solvent. The...
US20100305356 METHOD FOR PRODUCING ISOCYANATES  
The present invention relates to a process for preparing isocyanates.
US20120004446 PROCESS AND APPARATUS FOR PREPARING ISOCYANATES  
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, optionally in the presence of an inert medium, in which phosgene...
US20110144381 METHOD FOR PURIFYING A CHLORINE SUPPLY  
This invention provides a method for purifying a chlorine supply that includes a chlorine component, a bromine component, and nitrogen trichloride. The method includes the steps of introducing the...
US20130172604 PROCESS FOR THE PRODUCTION OF METHYLENE DIPHENYL DIISOCYANATE ISOMER MIXTURES WITH SPECIFIC ISOMER DISTRIBUTIONS AND NEW PRODUCTS DERIVED  
The present invention a process and apparatus for the production of methylene diphenyl diisocyanate (MDI) isomer mixtures with a low 2,2′-MDI isomer content and a high 2,4′-MDI isomer content. The...
US20120202961 ISOCYANATE MANUFACTURE  
The present invention encompasses the finding that improvements can be achieved in manufacture of isocyanates through the use of a substitute for or a precursor of phosgene. Methods and...
US20090149671 Preparation of light-colored isocyanates  
The invention relates to the preparation of isocyanates by phosgenation of amines in the gas phase, with these isocyanates having a comparatively low proportion of color-imparting compounds.
US20120123152 PROCESS FOR THE PREPARATION OF ISOCYANATES  
An isocyanate is produced by reacting an amine with a stoichiometric excess of phosgene in the gas phase. This reaction is carried out at a temperature above the amine's boiling point to obtain a...
US20120123151 PROCESS FOR PREPARING METHYLENEDI(PHENYL ISOCYANATE)  
The invention relates to a process for preparing methylenedi(phenyl isocyanate), which comprises (a) the phosgenation of two-ring and/or multiring methylenedi(phenylamine), (b) the fractionation...
US20110263892 PROCESS FOR PREPARING AN ISOCYANATE  
The present invention relates to a process for preparing an isocyanate, comprising hydrogenating a mixture (Gi) comprising an amine in the presence of a hydrogenation catalyst comprising copper to...
US20100298596 PROCESS FOR THE PRODUCTION OF ISOCYANATES  
Isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), are produced by reaction of amines dissolved in a solvent with phosgene in the same solvent to form...
US20120157709 PROCESS FOR PREPARATION AND PREFERABLY DISTILLATIVE WORKUP OF DIPHENYLMETHANE DIISOCYANATE (MDI)  
What is proposed is a process for preparation and distillative workup of diphenylmethane diisocyanate (MDI), proceeding from a benzene-comprising feedstream, in which, in a catalytic hydrogenation...
US20100010257 SEPARATION OF AMMONIUM CHLORIDE FROM THE GAS PHASE OF AN ISOCYANATE PRODUCTION PROCESS  
Isocyanates are produced in the gas phase and by-products such as ammonium halides are selectively separated from the gas phase by desublimation.
US20120108845 PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE  
Isocyanates are produced by reacting a primary amine with phosgene in the gas phase. In this process, the amine is vaporized and then superheated prior to introduction into the reactor. The amine...
US20120197038 PROCESS FOR PREPARING ISOCYANATES  
Process for preparing isocyanates by phosgenation of amines, wherein phosgene and amine are brought into contact in at least 2 mixing chambers connected in parallel.
US20100317889 PROCESS FOR PREPARING ISOCYANATES  
Process for preparing isocyanates by phosgenation of amines, wherein phosgene and amine are brought into contact in at least 2 mixing chambers connected in parallel.
US20120302786 PROCESS FOR PREPARING POLYISOCYANATES FROM BIOMASS  
The present invention relates to a process for preparing polyisocyanates from natural raw material sources, in which a composition comprising low molecular weight aromatics which comprise at least...
US20070265466 Process for the coupled production of chlorline and isocyanates  
A process for the coupled production of chlorine and isocyanates in which the sulfuric acid used for both processes is combined after use, concentrated together and returned to one or both processes.
US20100210870 METHOD FOR PRODUCING ISOCYANATES  
The present invention relates to a process for preparing isocyanates.
US20110105785 PROCESS FOR PREPARING ISOCYANATES  
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, if appropriate in the presence of at least one inert medium, the...
US20140114087 PROCESS FOR PREPARING ISOCYANATES BY PHOSGENATION OF AMINES IN THE LIQUID PHASE  
The present invention relates to a process for preparing isocyanates by reacting amines with phosgene in the liquid phase, where phosgene, hydrogen chloride and isocyanates are separated with...
US20130109883 PROCESS FOR PREPARING ISOCYANATES AND/OR POLYISOCYANATES  
The invention relates to a process for preparing isocyanates and/or polyisocyanates by reacting the corresponding amines with phosgene, optionally in the presence of an inert medium, in a reactor...
US20120302785 METHOD FOR PRODUCING ISOCYANATES IN THE GAS PHASE  
An isocyanate is produced by continuously reacting an amine with phosgene in the presence of an inert substance in the gas phase. In this process, a phosgene-containing stream and a stream...
US20070276154 PROCESSES FOR THE PRODUCTION OF ORGANIC ISOCYANATES  
Processes for the production of organic isocyanates, comprising the production of phosgene by reaction of CO with Cl2, the reaction of the phosgene with organic amines to form the organic...
US20070232827 Isocyanate Production Method  
A process for the preparation of isocyanates by reacting amines with phosgene, the phosgene-containing stream of starting materials (i) being substantially free of isocyanates and (ii) having a...
US20090054684 PROCESSES FOR PREPARING LOW-CHLORINE ISOCYANATES  
Processes comprising providing an amine reactant, and reacting the amine reactant with a stream of phosgene in a reaction zone to form a product comprising a corresponding isocyanate, wherein the...
US20100048942 PROCESS FOR PREPARING ISOCYANATES  
The present invention relates to a process for preparing isocyanates in particular apparatuses.
US20080171894 Mmdi and Pmdi Production By Means of Gas Phase Phosgenation  
The invention relates to a process for preparing isocyanates, which comprises the steps (1) preparation of a crude MDA mixture by reaction of aniline with formaldehyde, with the reaction...
US20110021811 PROCESS FOR THE PREPARATION OF TOLUENE-DIISOCYANATE  
The present invention relates to a process for the preparation of toluene-diisocyanate. In this process, toluenediamine is reacted with phosgene to give crude toluene-diisocyanate, the crude...
US20110213177 PROCESS FOR PREPARING ISOCYANATES IN THE GAS PHASE  
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, in the presence or absence of an inert medium, which comprises the...
US20110301380 PROCESS AND APPARATUS FOR PREPARING ISOCYANATES  
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, optionally in the presence of an inert medium, in which the amine...
US20070043233 Gas-phase phosgenation process  
The present invention relates to a process for the phosgenation of amines in the gas phase, in which a specific type of heat exchanger is used for vaporizing the amines.
US20130131377 METHOD FOR PRODUCING ISOCYANATES IN THE GAS PHASE  
The invention relates to a process for the preparation of isocyanates by reaction of the corresponding amines with phosgene in the gas phase, wherein a diluent containing between 90.0000% by...
US20120232307 TWO-STAGE PROCESS FOR COST-EFECTIVE DEPOSITION OF HOMOGENEOUS CATALYSTS IN MDA SYNTHESIS  
The invention provides a process for preparing diphenylmethanediamine, comprising the steps of: a) reacting aniline with formaldehyde in the presence of an acid,b) neutralizing the predominant...
US20130150620 METHOD FOR PRODUCING ISOCYANATE  
The invention relates to a process for preparing an isocyanate, which involves contacting fluid streams of amine, phosgene and inert medium in at least one mixing device, such that an inert medium...
US20150080600 PROCESS FOR PREPARING ISOCYANATES  
The present invention relates to gas phase phosgenation of amines for preparation of isocyanates. In the present invention, phosgene is prepared by reacting chlorine with an excess of carbon...
US20080200721 Mdi Production By Means of Liquid Phase and Gas Phase Phosgenation  
The invention relates to a process for preparing isocyanates, which comprises the (1) preparation of a crude MDA mixture by reaction of aniline with formaldehyde,(2) separation of the crude MDA...
US20150126769 METHOD FOR WORKING UP DISTILLATION RESIDUES FROM ISOCYANATE PRODUCTION  
The present invention relates to a method for working up distillation residues from isocyanate production in which monomeric isocyanate present in distillation residues is recovered by means of a...
US20120251435 PROCESS FOR PREPARING ISOCYANATES  
A process is proposed for preparing isocyanates by phosgenating the corresponding amines in the gas phase, which comprises dividing a phosgene-containing reaction mixture from the gas phase...
US20070287857 Process for the production of toluene diisocyanate  
The invention relates to a process for the production of toluene diisocyanate, in which the crude toluenediamine obtained from the hydrogenation is purified and then phosgenated. The purification...
US20070015934 Method for the purification of isocyanates  
Isocyanates are prepared by a process in which a product stream from the isocyanate synthesis is purified.
US20110213178 PROCESS FOR PREPARING ISOCYANATES  
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, if appropriate in the presence of an inert medium, in which the...
US20060089507 Method for separating isocyanates out from a reaction mixture  
The present invention relates to a process for preparing isocyanates by reaction of amines with phosgene in a reactor and subsequent separation of the isocyanate from the reaction mixture leaving...
US20060004220 Bifunctional phenyliso(thio)cyanates, processes and intermediates products for their Preparation  
A process for preparing phenyl iso(thio)cyanates of the formula I in which a compound of the formula II or its HCl adduct is reacted with a phosgenating agent where W is oxygen or sulfur and Ar...
US20110124908 PROCESS FOR PREPARING ISOCYANATES  
The invention provides a process for preparing polyisocyanates, comprising the steps of a) reacting amines with phosgene,b) removing hydrogen chloride, excess phosgene and, if appropriate, the...
US20090240077 PROCESS FOR PRODUCING DIAMINES AND POLYAMINES OF THE DIPHENYLMETHANE SERIES  
The present invention relates to a process for producing diamines and polyamines of the diphenylmethane series (MDA) by reacting aniline and formaldehyde in the presence of an acid catalyst,...
US20110306786 USE OF A PISTON REACTOR TO IMPLEMENT A PHOSGENATION PROCESS  
A process for phosgenating an amine comprising employing a plug-flow type reactor with internal recycle is disclosed. The process can be continuous, which makes it possible to prepare, in a single...
US20070269365 PROCESSES FOR THE PREPARATION OF ISOCYANATES  
Processes are described which comprise: (a) reacting chlorine with carbon monoxide to form phosgene; (b) reacting the phosgene with at least one organic amine to form at least one isocyanate and...
US20090175121 Process and mixing unit for the preparation of isocyanates by phosgenation of primary amines  
The invention relates to a mixer reactor of the rotor-stator type. This mixer reactor comprises a substantially rotationally symmetric housing which has a distributing chamber, a mixing chamber, a...
US20070265465 Process for the production of isocyanates  
Isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), are produced by reaction of amines dissolved in a solvent with phosgene in the same solvent to form...

Matches 1 - 50 out of 104 1 2 3 >