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Benefits of Ultrasounds
The origin of sonochemical effects in liquids is the phenomenon of acoustic cavitation, which is "the formation, growth, and implosive collapse of bubbles in a liquid". Cavitational collapse produces intense local heating (~5000 K), high pressures (~1000 atm), and enormous heating and cooling rates (>109 K/sec) and liquid jet streams (~400 km/h). The use of ultrasounds (sonochemistry) can result in several (beneficial) effect in chemical reactions and processes:

  • increase in reaction speed
  • increase in reaction output
  • more efficient energy usage
  • switching of reaction pathway
  • performance improvement of phase transfer catalysts
  • avoidance of phase transfer catalysts
  • use of crude or technical reagents
  • activation of metals and solids
  • increase in the reactivity of reagents or catalysts

Directory Contents
The web site "Organic Sonochemistry" is an excellent starting point for both a researcher new to the field as an expert who is looking for a intuitively organized web site about this subject.

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