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9029594 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.
9029595 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...
9024057 Process for the preparation of isocyanates in the gas phase  
Aromatic isocyanates are produced by reacting one or more aromatic primary amines with phosgene in the gas phase. The phosgene and primary aromatic amine(s) are reacted at a temperature above the...
9006481 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...
8981145 Process for preparing isocyanates  
The invention relates to a process for preparing isocyanates, comprising (a) the reaction of at least one amine with phosgene in the gas phase in a reaction zone and (b) the subsequent cooling of...
8969615 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...
8957245 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...
8933262 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...
8921594 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...
8916725 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...
8907124 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...
8853443 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...
8844574 Spiral mixer nozzle and method for mixing two or more fluids and process for manufacturing isocyanates  
An apparatus for mixing at least first and second fluid, comprising: (a) a first nozzle comprising a first flow duct defining a first flow chamber, and having a first nozzle tip having a first...
8841480 Process for the preparation of light-colored iocyanates of a diphenylmethanediisocyanate series  
The present invention accordingly provides a process for preparing light-colored polyphenylene-polymethylene polyisocyanates comprising the steps (a) providing an amount of chlorine, (b)...
8829232 Process for preparing aromatic isocyanates  
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, if appropriate in the presence of at least one inert medium, in...
8816126 Process for preparing isocyanates  
Process for preparing isocyanates by reacting the corresponding amines comprised in at least one feed stream A with phosgene comprised in at least one feed stream P in a reaction plant comprising...
8809575 Process 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...
8802890 Process for manufacturing isocyanates  
The present invention relates to a process for manufacturing isocyanates from an amine compound. The process comprises the steps of a) Providing chlorine;b) Providing carbon monoxide;c) Reacting...
8791291 Process for preparing isocyanates by phosgenation of the corresponding amines in the gas phase  
A process for preparing isocyanates by phosgenation of the corresponding amines in a fluidized-bed reactor (R), wherein a gas stream (1) comprising the phosgene is used as fluidizing gas and keeps...
8779181 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...
8772535 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.
8765996 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...
8759568 Process for preparing isocyanates  
The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene, optionally in the presence of an inert medium, in which phosgene and amine are...
8759569 Process for the production of isocyanates, preferably diisocyanates and polyisocyanates with solvent recirculation  
The present invention relates to a process for the production of isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), by reacting an amine with phosgene...
8748655 Process for preparing light-coloured isocyanates of the diphenylmethane series  
The present invention relates to a process for preparing light-colored polyphenylene-polymethylene-polyisocyanate (PMDI), comprising the steps (a) providing carbon monoxide and chlorine, (b)...
8716517 Method for producing diisocyanates by gas-phase phosgenation  
A process for preparing diisocyanates by gas-phase phosgenation starting out from a feed stream comprising the corresponding diamines and a phosgene-comprising feed stream, in which the feed...
8703997 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...
8692016 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.
8686182 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...
8609887 Process for preparing polyisocyanates comprising biuret groups  
The present invention relates to a process for preparing polyisocyanates comprising biuret groups from diisocyanates or polyisocyanates and diamines.
8563767 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...
8563768 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...
8558026 Method for producing isocyanates  
The present invention relates to a process for preparing isocyanates.
8552217 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...
8546606 Method for producing polyisocyanates  
The invention relates to a process for preparing polyisocyanates by reacting primary amines with phosgene, which comprises the steps a) mixing the amine with the phosgene,b) reacting the amine...
8519179 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...
8487127 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...
8440856 Method for treating residues from the production of isocyanates  
This invention relates to a process for working up residues from production of isocyanates. This process involves hydrolyzing residues from production of at least one isocyanate with water to form...
8436204 Method for producing isocyanates  
The invention provides a process for preparing isocyanates by reacting amines with phosgene, wherein the amine or a mixture of amine and a solvent is mixed in the form of an aerosol with gaseous...
8399701 Process for the preparation of di- and polyamines of the diphenylmethane series  
The present invention relates to a process for the preparation of di- and polyamines of the diphenylmethane series, and to the preparation of di- and polyisocyanates of the diphenylmethane series...
8399702 Process for the production of aromatic diisocyanates in the gas  
Aromatic diisocyanates are produced by reacting in the gas phase the corresponding primary aromatic diamine with phosgene. The phosgene and the primary aromatic diamine are reacted within a mean...
8378140 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...
8318971 Process for preparing methylenediphenyl diisocyanates  
The invention relates to a process for preparing methylenediphenyl diisocyanates which comprises at least the steps: A) reaction of aniline with formaldehyde in the presence of hydrochloric acid...
8288584 Process for preparing isocyanates  
The present invention relates to a process for preparing diisocyanates from diamines and phosgene in the gas phase.
8273915 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...
8258337 Method for producing isocyanates  
The present invention relates to a process for preparing isocyanates and an apparatus suitable for this purpose, and also its use. In the process, an amine and phosgene, both in the gas phase,...
8232421 Bifunctional phenyl ISO (THIO) cyanates, processes and intermediates 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...
8212069 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.
8206652 Jet reactor with flow ducts and process for preparing isocyanates using it  
The present invention provides a flow duct type jet reactor and a process for preparing isocyanates using it. The flow duct type jet reactor situates flow ducts in inner feed pipe which form...
8183407 Process for production of isocyanate, isocyanate produced by the process, and use of the isocyanate  
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...

Matches 1 - 50 out of 304 1 2 3 4 5 6 7 >