| Document |
Document Title |
|
JP4554595B2 |
Production of polyisocyanates comprises mixing an amine with phosgene, reacting the amine with the phosgene in a tubular reactor, and passing the reactor effluent to a distillation column. Independent claims are also included for: (1) tu...
|
|
JP4541685B2 |
Preparation of aliphatic isocyanates from the corresponding aromatic isocyanates comprises urethanization of the aromatic isocyanate, hydrogenation of the urethane with hydrogen in the presence of a supported ruthenium catalyst having a ...
|
|
JP2010529064A |
The present invention relates to a process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates by sequential reaction of benzene to nitrobenzene to aniline to polyphenyl polymethylene poly...
|
|
JP4515044B2 |
The gas-phase phosgenation of di- or tri-amines to corresponding isocyanates is carried out in a tubular reactor with a central nozzle which is connected to the amine inlet by a flexible tube and centred in the reactor by at least two fl...
|
|
JP4499506B2 |
A cycloaliphatic diisocyanate is continuously prepared by reacting cycloaliphatic diamine(s) with carbonic acid derivative(s) and alcohol(s), to form a reaction mixture of cycloaliphatic diurethane(s); which are subsequently separated fr...
|
|
JP4490288B2 |
Method for purifying isocyanates (I) by distillation. Method for purifying isocyanates by distillation comprises: (a) first separating a stream (1) containing (I), high and low boilers and non-evaporatable residue (X) by distillation (at...
|
|
JP4486800B2 |
Quenching of a gaseous mixture containing diisocyanates, phosgene and hydrogen chloride and obtained in the gaseous phosgenation of diamines to yield diisocyanates is effected by injecting a quenching fluid into gas flowing from a cylind...
|
|
JP4480080B2 |
A method for the production of aromatic di-isocyanates (I) by gas-phase reaction of phosgene with diamines involves carrying out the reaction in a reaction zone under a pressure of more than 3 bar and less than 20 bar. An Independent cla...
|
|
JP2010120870A |
To provide a method for producing a methylene-crosslinked polyphenyl polyisocyanate which achieves sufficient hue improvement while suppressing an amount of hydrogen chloride used.The method for producing a methylene-crosslinked polyphen...
|
|
JP4469630B2 |
Production of diisocyanates comprises phosgenation of the corresponding diamine comprises separately heating the diamine vapor, optionally diluted with an inert gas or inert solvent, and phosgene at 200-600 [deg]C and feeding the diamine...
|
|
JP2010111610A |
To provide an organic polyisocyanate composition effectively prevented from discoloring.The organic polyisocyanate composition is obtained by blending an organic polyisocyanate compound, a phenolic anti-oxidation agent, and an organic ph...
|
|
JP2010512364A |
The present invention relates to a process for preparing isocyanates in particular apparatuses.
|
|
JP2010077165A |
To provide a method for synthesizing a fluorinated compound using a carbamoyl fluoride as a fluorinating source.The method for using a carbamoyl fluoride as fluorinating agent is disclosed. The method comprises treating a derivative bear...
|
|
JP4443637B2 |
|
|
JP4443149B2 |
The invention is directed to a process for the purification of toluenediisocyanate from a crude distillation feed comprising toluenediisocyanate, an organic solvent and less than 2% by weight phosgene by separating the crude distillation...
|
|
JP2010508374A |
The invention relates to a process for preparing isocyanates in the gas phase.
|
|
JP2010508375A |
The invention relates to a process for preparing isocyanates in the gas phase.
|
|
JP2010507614A |
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.
|
|
JP2010047503A |
To provide a method for producing an isocyanate mixture reduced in the content of a metal affecting the reactivity of the isocyanate mixture.There is provided the method for producing the isocyanate mixture C, having a reaction process f...
|
|
JP2010047501A |
To provide a method of pre-treatment before producing an isocyanate mixture for obtaining the isocyanate mixture reduced in the contents of metals, such as iron, affecting the reactivity of the isocyanate mixture.There is provided the pr...
|
|
JP4416646B2 |
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.
|
|
JP4416465B2 |
Production of diphenylmethane polyisocyanates involves (1) reacting aniline and formaldehyde in presence of HCl to give a mixture containing diphenylmethane polyamines, HCl, aniline and water; (2) distilling off the excess of aniline and...
|
|
JP2010018534A |
To provide an industrially easily applicable method for producing a polyisocyanate by which the polyisocyanate having excellent hue can be produced from a raw material in an amount smaller than that in a conventional technique.The method...
|
|
JP2009545553A |
Preparation of pentamethylene-1,5-diisocyanate comprises: converting lysine to 1,5-pentanediamine; and converting the 1,5-pentanediamine to pentamethylene-1,5-diisocyanate. An independent claim is included for pentamethylene-1,5-diisocya...
|
|
JP4383098B2 |
The invention relates to a process for the purification of toluenediisocyanate by fractionating a crude distillation feed comprising toluenediisocyante, an organic solvent and less than 2% by weight of phosgene in a heat integrated syste...
|
|
JP4375949B2 |
A process for the production of (cyclo)aliphatic diisocyanates and triisocyanates comprises phosgenation of the corresponding diamine or triamine in the gas phase. A process for the production of (cyclo)aliphatic diisocyanates and triiso...
|
|
JP4360878B2 |
Purification of toluene diisocyanate (TDI) from its crude distillation feed (F1) involves fractionating (F1), having less than 2% by weight of phosgene, to remove the solvent (and optionally the reaction residues) to produce a crude tolu...
|
|
JP4357418B2 |
The present invention relates to a continuous process for preparing isocyanates by reacting primary amines with phosgene, wherein the reaction is carried out in a cascade of at least two tube reactors and the gas phase formed in the reac...
|
|
JP2009537578A |
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 isocyanates, and the separation of the organic is...
|
|
JP4339583B2 |
Preparation of di- and/or triisocyanates by phosgenation of corresponding di- and/or triamines involves heating the gaseous di- and/or triamines and phosgene separately to 200-600 degrees C, mixing the two in a static mixer with specific...
|
|
JP4336655B2 |
The invention relates to a process for the partial or complete separation of a mixture comprising hydrogen chloride and phosgene, possibly solvents and possibly low boilers and inerts as are typically obtained in the preparation of isocy...
|
|
JP4328109B2 |
|
|
JP4324559B2 |
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 the reactor and purification of the isocy...
|
|
JP4324558B2 |
The invention relates to a process for preparing polyisocyanates by reacting organic amines with phosgene, wherein the reaction is carried out in at least three stages, with the first stage being carried out in a mixing apparatus, the se...
|
|
JP4324560B2 |
The invention relates to a process for preparing isocyanates by reaction of amines with phosgene in the presence of inert organic solvents in a reactor and subsequent work-up of the reaction mixture leaving the reactor, wherein the solve...
|
|
JPWO2007116761A1 |
The diphenylmethane-based isocyanate composition of the present invention contains a composition obtained by adding an alkylchlorosilane having a total carbon number of 4 to 24 in the molecular structure to a diphenylmethane-based isocya...
|
|
JP4314631B2 |
|
|
JP4312609B2 |
A reactor for the thermal cleavage of monofunctional and/or polyfunctional carbamic esters into the corresponding isocyanate and hydroxyl components in the liquid phase having devices for introduction of heat into the reactor, where the ...
|
|
JP4314071B2 |
A process for the production of 1,5-naphthalene diamine (I) comprises reaction of 4-(2-nitrophenyl)-n-butyronitrile to 4-(2-nitrophenyl)-n-butyric acid. Independent claims are included for: (1) a process for the production of 5-nitro-3,4...
|
|
JP4307588B2 |
|
|
JP4308776B2 |
The invention provides a process for preparing isocyanates by reacting amines with phosgene, wherein the phosgene-containing feed stream has a hydrogen chloride content of more than 0.8% by mass.
|
|
JP4298995B2 |
|
|
JP4297702B2 |
Production of dinitronaphthalene isomer mixtures involves reaction of naphthalene and/or 1-nitronaphthalene with nitric acid in the presence of zeolites. Independent claims are also included for production of: (i) 1,5-diaminonaphthalene ...
|
|
JP2009149614A |
To provide a light-colored isocyanate as a raw material for a light-colored or uncolored polyisocyanate.The method for producing the light-colored isocyanate is regulated as follows. The PRI (polarographically reducible impurity) value o...
|
|
JP4292558B2 |
To easily obtain the subject composition with high compatibility with other resins by continuous contact mixing of a specific aromatic polyisocyanate composition in the presence of a separatory solvent being in a supercritical condition ...
|
|
JP4292560B2 |
|
|
JP4292559B2 |
|
|
JP4292561B2 |
To provide a method for producing a stabilized polyfunctional aromatic polyisocyanate composition. This method for producing a polyfunctional aromatic polyisocyanate composition selectively containing polynuclear skeletal substances comp...
|
|
JP2009119346A |
To provide a flash tank which prevents the corrosion by a corrosive fluid and is capable of attempting the enhancement of durable performance, to provide a depressurizing device equipped with the flash tank and to provide a polyisocyanat...
|
|
JP4273531B2 |
|
