Abstract:
Verfahren zur Herstellung eines N-unsubstituierten oder N-substituierten Aziridins der Formel (III), wobei man ein Olefin der Formel (I), in denen R 1 bis R 5 unabhängig voneinander Wasserstoff, lineare oder verzweigte Alkylreste mit 1 bis 16 Kohlenstoffatomen, Hydroxyalkylreste mit 1 bis 4 Kohlenstoffatomen, Cycloalkylreste mit 5 bis 7 Kohlenstoffatomen, Benzylreste und Phenylreste, die jeweils in o-, m-oder p-Stellung des Phenylrestes durch Methoxy-, Hydroxy-, Chlor-oder Alkylreste mit 1 bis 4 Kohlenstoffatomen substituiert sein können, darstellen und die Reste R 1 oder R 2 mit den Resten R 3 oder R 4 zu einem 5-bis 12-gliedrigen Ring geschlossen sein können oder die Reste R 1 und R 2 zu einem 5-bis 12-gliedrigen Ring geschlossen sein können, mit Ammoniak bzw. einem primären Amin der Formel R 5 NH 2 in Gegenwart von Iod oder Brom umsetzt.
Abstract:
A method for producing a multimetal oxide catalyst comprises preparation of a precursor composition, exposing said precursor composition to elevated temperatures to activate the composition, and grinding the activated composition. The preparation of the precursor composition comprises: a) forming a plasticized precursor composition from the constituents of the composition; b) discharging the plasticized precursor composition from an extruder having at least one die to form extrudates; c) allowing the extrudates to drop onto a transfer surface disposed beneath the at least one die whereby the extrudates break into pieces which come to rest on the transfer surface; d) transferring the pieces to at least one drying chamber; and e) moving the pieces, through the at least one drying chamber on an air permeable drying conveyor belt; wherein steps b) through d) are carried out under reduced pressure. The method allows the production of a multimetal oxide catalyst with uniform characteristics. Fine particles of the multimetal oxide precursor that may be generated during extrusion of the plasticized precursor composition and handling of the extrudates are removed.
Abstract:
The present invention relates to a process for the treatment of waste water resulting from a method for the preparation of a zeolitic material employing an organotemplate as structure directing agent, said process comprising: (1) providing a waste water stream (S0) comprising water and an organotemplate and/or an organotemplate degradation product; (2) providing a nonionic adsorbent material having a BET surface area in the range of from 200 to 2,000 m 2 /g; (3) contacting the waste water stream (S0) with the nonionic adsorbent material; and (4) separating the treated waste water from the nonionic adsorbent material to obtain a treated waste water stream (S1); wherein immediately before contacting the nonionic adsorbent material in (3) the waste water stream (S0) has a temperature in the range of from 30 to 90°C.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Konditionierung von suspendierten Katalysatoren, das dadurch gekennzeichnet ist, dass mindestens eine Teilmenge des Katalysatoren enthaltenden Reaktionsmediums aus einem oder mehreren Reaktoren entnommen wird und die suspendierten, mindestens teilweise inaktivierten Katalysatoren mittels mindestens einer Membranfiltration abgetrennt und gereinigt werden, wobei mindestens eine der Membranfiltrationen als Diafiltration ausgeführt wird.
Abstract:
The present invention relates to a method for conditioning suspended catalysts, characterized in that at least a partial quantity of the reaction medium containing catalysts is obtained from one or several reactors, and the suspended, at least partially deactivated catalysts are separated and cleaned by means of at least one membrane filtration, wherein at least one of the membrane filtrations is performed as a diafiltration.
Abstract:
The invention relates to a method for producing an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound, selected from the group comprising ammonia, primary and secondary amines, in the presence of a zirconium dioxide-containing catalyst and a nickel-containing catalyst. The invention is characterised in that the catalytically active weight of the catalyst, prior to reduction with hydrogen, contains oxygen-containing compounds of zirconium, copper and nickel and oxygen-containing compounds of one or more metals, selected from Sb, Pb, Bi and In.
Abstract:
The invention relates to a method for producing an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound, selected from the group comprising ammonia, primary and secondary amines, in the presence of a zirconium dioxide and nickel-containing catalyst. The catalytically active mass of the catalyst, prior to its reduction with hydrogen, contains oxygen-containing compounds of zirconium, copper, nickel and cobalt and 5.5 to 12 wt% of oxygen-containing compounds of molybdenum, calculated as MoO3.
Abstract:
Process for producing ethyleneamines by reacting monoethanolamine (MEOA) with ammonia in the presence of a transition metal heterogeneous catalyst in which the catalytically active mass of the catalyst before the treatment with hydrogen contains oxygen-containing compounds of aluminium, copper, nickel and cobalt and the shaped catalyst body in the case of bead shape or rod shape in each case has a diameter of
Abstract:
The invention relates to mixtures containing linear block copolymers consisting of vinyl aromatic monomers and dienes, of structure (I) S1-B1-S2 and (II) S3-B2-S4, wherein S1 represents a block of vinyl aromatic monomers having a number average molar mass Mn of between 40,000 and 100,000 g/mol; S2, S3 and S4 respectively represent blocks of vinyl aromatic monomers having a number average molar mass Mn of between 5,000 and 20,000 g/mol; and B1 and B2 respectively represent blocks of dienes or copolymer blocks of dienes and vinyl aromatic monomers having a number average molar mass Mn of between 15,000 and 40,000 g/mol. The ratio of the block copolymers (I)/(II) is between 0.6 and 2.