Abstract:
Method for reducing the concentration of nitrogen oxides in waste gases released during the production of organic amino compounds, wherein an organic compound is first reacted with NO x and/or nitric acid to form an organic nitro compound with the formation of an NO x -containing waste gas stream and the organic nitro compound is converted to the organic amino compound by means of a hydrogen-containing reaction gas, the reaction of the organic nitro compound with the hydrogen-containing reduction gas taking place with the formation of a hydrogen-containing waste gas stream, the method being characterised in that the NO x -containing waste gas stream (1) is combined with the hydrogen-containing waste gas stream and/or an externally supplied hydrogen stream (3) and is reacted at a temperature of 800 to 1700°C for the at least partial reduction of the NO x concentration. An apparatus for carrying out the method is also described.
Abstract:
A method of nitrating a compound selected from the group consisting of Formulas (AA) (BB) (CC) (DD) wherein Ar is a nitratable aromatic ring, R 1 , R 2 , R 3 , and R 4 are hydrogen, alkyl or an aromatic groups, G is selected from the group consisting of CR 1 R 2 , O, S, SO and SO 2 , R is a heterocyclic ring or other groups bearing a basic nitrogen atom 10 and n is an an integer of 1 to 12 is provided.
Abstract:
Methods and intermediates for synthesizing triethylenetetramine and salts thereof, as well as novel triethylenetetramine salts and their crystal structure, and triethylenetetramine salts of high purity.
Abstract:
The invention relates to a method for producing combinatorial libraries of aryl-substituted amines comprising at least two different compounds of general formula (I). The invention particularly relates to libraries of geminally substituted amines, which comprise at least one substituent R or R containing one aryl group, and to the special use of these amines as intermediate stages in the combinatorial synthesis of active substances or as active substances in medicaments.
Abstract:
The invention relates to a method for producing combinatorial libraries of aryl-substituted amines comprising at least two different compounds of general formula (I). The invention particularly relates to libraries of geminally substituted amines, which comprise at least one substituent R or R containing one aryl group, and to the special use of these amines as intermediate stages in the combinatorial synthesis of active substances or as active substances in medicaments.
Abstract:
A process for the preparation of diaminodinitropyridine or diaminodinitrobenzene by contacting an aminopyridine or aminobenzene with oleum and nitric acid, wherein the improvement comprises adding at least about 1% molar excess of nitric acid, based upon the aminopyridine or aminobenzene, with stirring for at least two hours to form first the intermediate sulfonic acid, and then diaminodinitropyridine or diaminodinitrobenzene, and use of such products in the preparation of rigid rod polymers is disclosed.
Abstract:
A method of nitrating a compound selected from the group consisting of Formulas (AA) (BB) (CC) (DD) wherein Ar is a nitratable aromatic ring, R 1 , R 2 , R 3 , and R 4 are hydrogen, alkyl or an aromatic groups, G is selected from the group consisting of CR 1 R 2 , O, S, SO and SO 2 , R is a heterocyclic ring or other groups bearing a basic nitrogen atom 10 and n is an an integer of 1 to 12 is provided.