Abstract: An acoustofluidic device and a method for trapping particles with a positive acoustic contrast contained in a moving carrier fluid are disclosed. The device has a first channel channeling the moving carrier fluid and a second channel. The first channel and a portion of the second channel parallel to the first channel are separated by a common separating wall. A driving circuitry driving an acoustic transducer is configured to drive the latter at a frequency at which an acoustic radiation force is generated on the particles in the first channel that points towards a displacement antinode of a vibrational eigenmode of the separating wall, while at least two counter-rotating streaming vortices are formed by the moving carrier fluid which, in combination with the acoustic radiation force, form a particle trap at said displacement antinode of the eigenmode.

Abstract: A process for the production of 3-aminocrotononitrile by dimerization of acetonitrile. In this process, the deprotonation step takes place with sodium amide as a strong base in the presence of liquid ammonia. 3-Aminocrotononitrile is used as an initial product for the production of pharmaceutical agents, pesticides or azo dyes.