Abstract: A muffler for a turbo engine or piston engine, particular a screw compressor, includes a housing (1.1-1.3); a disk arrangement having at least one disk (3, 4, 5) which is fastened to the housing; a pipe arrangement which is fastened to the disk arrangement and which has at least one pipe (2.1, 2.2) for guiding a fluid of the turbo engine or piston engine; and a vibration-damping jacket (9) of dimensionally stable material which at least partially covers the outer side of the housing (2.2). At least one elastic element (3.3, 4.3, 6, 7, 8) is arranged between the pipe arrangement and the housing.

Abstract: A muffler for a turbo engine or piston engine, particular a screw compressor, includes a housing (1.1-1.3); a disk arrangement having at least one disk (3, 4, 5) which is fastened to the housing; a pipe arrangement which is fastened to the disk arrangement and which has at least one pipe (2.1, 2.2) for guiding a fluid of the turbo engine or piston engine; and a vibration-damping jacket (9) of dimensionally stable material which at least partially covers the outer side of the housing (2.2). At least one elastic element (3.3, 4.3, 6, 7, 8) is arranged between the pipe arrangement and the housing.

Abstract: Sodium salts of aromatic sulphinic acids containing nitro groups are obtained in particularly pure form and good yield by introducing the corresponding sulphonyl chlorides into an aqueous alkali metal sulphite solution which is at a temperature of -10.degree. to 45.degree. C. and has a pH of 6 to 10, then cooling the suspension to -10.degree. to 0.degree. C., then metering in sodium hydroxide solution in such a way that the temperature does not exceed 0.degree. C. throughout the reaction, and then raising the temperature, maintaining stirring and simultaneously keeping the pH at 8 to 9 by the addition of sodium hydroxide solution.