Abstract: The present invention relates to a device for separating two immiscible phases and/or for extracting one phase with another phase (phase separation or extraction device), comprising at least one vessel for receiving the at least two phases, at least one pipe for supplying a fluid to the vessel, at least one pipe for discharging a fluid from the vessel, and at least one arrangement comprising a transparent disk for observing the separation operation or the extraction operation, wherein at least the side of the transparent disk that faces the phases to be separated or extracted consists of sapphire (sapphire glass) or mica (mica disk), and to the use of such a device in the preparation of di- and poly-amines of the diphenylmethane series.

Abstract: The invention relates to a method for producing organic amino compounds from organic nitro compounds, wherein the organic nitro compound hydrogenated to the organic amino compound with a hydrogen-containing gas stream by means of a catalyst, the reaction course of the hydrogenation being monitored by analysis of secondary products forming during hydrogenation, wherein the method is characterized in that the concentration of one or more gaseous secondary products is determined in the gas phase and if the concentration falls below a predefinable minimum concentration the hydrogenating activity of the catalyst is increased. The present invention also relates to a device for performing said method.

Abstract: The invention relates to a method for producing organic amino compounds from organic nitro compounds, wherein the organic nitro compound hydrogenated to the organic amino compound with a hydrogen-containing gas stream by means of a catalyst, the reaction course of the hydrogenation being monitored by analysis of secondary products forming during hydrogenation, wherein the method is characterised in that the concentration of one or more gaseous secondary products is determined in the gas phase and if the concentration falls below a predefinable minimum concentration the hydrogenating activity of the catalyst is increased. The present invention also relates to a device for performing said method.

Abstract: The present invention relates to a device for separating two immiscible phases and/or for extracting one phase with another phase (phase separation or extraction device), comprising at least one vessel for receiving the at least two phases, at least one pipe for supplying a fluid to the vessel, at least one pipe for discharging a fluid from the vessel, and at least one arrangement comprising a transparent disk for observing the separation operation or the extraction operation, wherein at least the side of the transparent disk that faces the phases to be separated or extracted consists of sapphire (sapphire glass) or mica ( mica disk), and to the use of such a device in the preparation of di- and polyamines of the diphenylmethane series.

Abstract: 1,4-diaminonaphthalene and/or 1,5-diaminonaphthalene are produced by (a) reacting naphthalene with a halogen, (b) optionally, separating 1,4-dihalogen naphthalene or 1,5-dihalogen naphthalene from the mixture from step (a), and (c) reacting the mixture from step (a) or the 1,4-dihalogen naphthalene or the 1,5-dihalogen naphthalene from step (b) with ammonia and/or an organic amine in the presence of a catalyst.

Abstract: 1,4-diaminonaphthalene and/or 1,5-diaminonaphthalene are produced by (a) reacting naphthalene with a halogen, (b) optionally, separating 1,4-dihalogen naphthalene or 1,5-dihalogen naphthalene from the mixture from step (a), and (c) reacting the mixture from step (a) or the 1,4-dihalogen naphthalene or the 1,5-dihalogen naphthalene from step (b) with ammonia and/or an organic amine in the presence of a catalyst.

Abstract: The invention relates to a polymerization catalyst system comprising a catalytic complex formed by activating a transition metal compound which comprises a metal selected from group 3 through 10 of the periodic table, preferably from group 4, 5, or 6 of the periodic table, and a group 13, 15, or 16 heterocyclic fused cyclopentadienide ligand. In one embodiment the inventive transition metal compound is represented by the [L]mM[A]n(S)o wherein M is a transition metal selected from groups 3 through 10 of the periodic table, and at least one of L is group 13, 15, or 16 heterocyclic fused cyclopentadienide ligand. Also disclosed is a polymerization process utilizing the catalyst systems of the invention. Ethylene polymerizations or copolymerizations with dimethyl (&eegr;5-pentamethylcyclopentadienyl)(1-azaindenyl) zirconium and bis(5-methyl-cyclopenta[b]thiophene) zirconium dichloride, activated by tris(pentafluorophenyl) boron and methylalumoxane, respectively, are illustrated.

Abstract: Polyurethane prepolymers and polyurethane elastomers based on 1,4-naphthalene are described. Methods of preparing the polyurethane prepolymers and elastomers are also described. Molded articles capable of withstanding high mechanical stresses, prepared from the polyurethane prepolymers and/or polyurethane elastomers of the present invention, are further described.

Abstract: Raney nickel catalysts obtainable by a process in which the melt of an alloy comprising 50 to 94 wt. % aluminum, 10 to 50 wt. % nickel, 0 to 20 wt. % iron, 0 to 15 wt. % cerium, cerium mixed metal, vanadium, niobium, tantalum, chromium, molybdenum or manganese and, optionally, further glass-forming elements is allowed to solidify rapidly with a cooling rate of >104 K/s and the rapidly solidified alloy is then subjected to a treatment with organic or inorganic bases are described. A process for the preparation of the Raney nickel catalysts mentioned and their use in the hydrogenation of organic compounds, in particular aromatic nitro compounds, are furthermore described.

Abstract: The invention encompasses late transition metal catalyst systems and their use in polymerization processes, particularly in solution, 2-phase suspension and super-critical phase polymerization of ethylene-containing polymers. Preferred embodiments include the use of a late transition metal catalyst system comprising a Group 8, 9, 10, or 11 metal complex stabilized by a bidentate ligand structure for polymerization under elevated ethylene pressure, or concentration, conditions.

Abstract: The present invention relates to zwitterionic neutral transition metal compounds. The compounds are suitable as catalyst components for the polymerization of olefins.

Abstract: The present invention relates to zwitterionic neutral transition metal compounds. The compounds are suitable as catalyst components for the polymerization of olefins.

Abstract: The present invention relates to zwitterionic neutral transition metal compounds. The compounds are suitable as catalyst components for the polymerization of olefins.