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


THE POWER OF
ULTRASOUND
4
10
ACOUSTIC CAVITATION
“Cavitation is an extraordinary
method of concentrating the
diffuse energy of sound into a
chemically usable form”.
Kenneth Suslick
4
11
ACOUSTIC CAVITATION
4
12
US
FACTORs AFFECT
AFFECTs FACTORs ???
13
Effects of Ultrasound
4
14
HOMOGENEOUS LIQUID-
PHASE REACTIONS
5
15
CAVITATION NEAR A SURFACE
5
16
HETEROGENEOUS POWDER-

HALIDES
N-alkylimidazole
Toluene
Alkylbromide
Stirring 800 (18h)
Extraction or filtration
Washing with ethyl acetate
N-alkylimidazole
Toluene
Alkylbromide
Ultrasound iradiation 800 (5h)
Extraction or filtration
Washing with ethyl acetate
24
HETEROGENEOUS LIQUID-LIQUID
REACTIONS (EMULSION)
25