Bài trình bày về: Tính chất và ứng dụng của sóng âm và sóng siêu âm trong hoá học xanh (Green chemistry of ultrasound). Đây là nguồn tài liệu cực kỳ có ích cho các bạn đang học về môn hoá học xanh ở bậc cao học, chỉ dùng làm tài liệu tham khảo thôi thì kiến thức của mình đã thay đổi hẳn.
Ultrasound as a green reactor Green chemistry Seminar 1 Presented by: Phạm Sỹ Nguyên Nguyễn Thị Kim Liên Dương Minh Mẫn Supervisor: Assoc. Prof. Dr Nam Thanh Son Phan 2 Contents Introduction Sound wave and ultrasound Applications of ultrasound in industry and chemistry, and ultrasound apparatus Power of ultrasound: Acoustic cavitation Effects of ultrasound on reactions 4/12 Green principles are adapted Researches on ultrasound-assisted reactions Conclusion 3 SOUND WAVE AND ULTRASOUND 1 4 4/12 green principles may be adapted by using ultrasound 2 5 Industrial applications of ultrasound 3 6 Ultrasound apparatus ultrasonic cleaning bath 2 7 ultrasonic horn Ultrasound apparatus 3 8 THE POWER OF ULTRASOUND 4 9 THE POWER OF ULTRASOUND 4 10 [...]...4 ACOUSTIC CAVITATION “Cavitation is an extraordinary method of concentrating the diffuse energy of sound into a chemically usable form” Kenneth Suslick 11 4 12 ACOUSTIC CAVITATION FACTORs AFFECT AFFECTs FACTORs ??? US 13 4 14 Effects of Ultrasound 5 15 HOMOGENEOUS LIQUIDPHASE REACTIONS 5 16 CAVITATION NEAR A SURFACE 5 17 HETEROGENEOUS POWDERLIQUID... REACTIONS “Ultrasound-promoted synthesis of quinolines using basic ionic liquids in aqueous media as a green procedure” Elaheh Kowsari, M Mallakmohammadi 2011 20 Effect of the ultrasonic irradiation time and the ultrasonic frequency on the substituted quinoline yield The ultrasonic irradiation time had significant effect on the condensation, when the amount of BIL1 (0.5 mmol) and the ultrasonic frequency... (3a) was obtained with 40%, 65%, and 95% GC yields, respectively 21 “Ultrasound-promoted a green protocol for the synthesis of 2,4-diarylthiazoles under ambient temperature in [bmim]BF4” Jalil Noei, Ahmad Reza Khosropour 2010 22 APPLICATION 23 GENERAL PROCEDURE FOR THE SYNTHESIS OF IMIDAZOLIUM HALIDES N-alkylimidazole Toluene Alkylbromide N-alkylimidazole Toluene Alkylbromide Stirring 800 (18h) Extraction... or filtration Washing with ethyl acetate 24 Ultrasound iradiation 800 (5h) Washing with ethyl acetate HETEROGENEOUS LIQUID-LIQUID REACTIONS (EMULSION) 25 GENERAL PROCEDURE FOR THE METATHESIS REACTION OF LEADING TO COMPOUNDS Quaternary salt Acetonitrile NaBF4,KPF6,CF3COON a,NaN(CN)2,NaNCS Quaternary salt Acetonitrile NaBF4,KPF6,CF3COON a,NaN(CN)2,NaNCS Stirring 700 (3h) Filtration 26 Ultrasound iradiation... APPLICATION 29 APPLICATION 30 APPLICATION 31 APPLICATION 32 APPLICATION 33 APPLICATION PRECIPITATION Porosity Size Density Chemical Flocculants or other chemical agents 34 Conclusion 35 Appendix 1: Effect of temperature 36