o 1 The synthesis of acetic aldehyde CH2=CH2 Pacha CH.CHO O2 CuCl2水溶液 Disadvantages Consume large amount of catalysts The concentration of CI is greater, and can lead to the formation of chromate by-products Those by-products is harmful to human healthy The use of Vanadium complexes led to the decreased use of PdCl, and the decrease of aqueous Cl, which further resulted in the reduction of the formation of cl containing organIc compounds
26 CH2=CH2 O2 PdCl2 CuCl2水溶液 CH3CHO ➢ Disadvantages: Consume large amount of catalysts. The concentration of Clis greater, and can lead to the formation of chromate by-products. Those by-products is harmful to human healthy. ❖ (1) The synthesis of acetic aldehyde ➢ The use of Vanadium complexes led to the decreased use of PdCl2 and the decrease of aqueous Cl- , which further resulted in the reduction of the formation of Clcontaining organic compounds
[2]The synthesis of hydroquinone Traditional method Disadvantage too many steps, a large mount of by-product, corrosive chemicals(H2SO4, HCl) H H Fecl FHCI H SO OH 27
27 (2) The synthesis of hydroquinone Traditional Method： Disadvantage: too many steps, a large mount of by-product, corrosive chemicals (H2SO4 ,HCl)
Environmental beigen method CH CH(CH3 2 3 CH CO OH CH3 CH=CH2 catalyst CH(CH3 )2 CO2H OH CH3 CH Advantages: Greener method Short reaction chain, By-products only formatted in the final step 28
28 Environmental beigen method: CH3 CH3 CH3 CH3 CH3 CH3 CH=CH2 CH( )2 CH(CH3 )2 O2 CO2H CO2H OH OH H + catalyst Advantages: Greener method: Short reaction chain， By-products only formatted in the final step
B] The synthesis of carbonyl compounds Varma et al: the activation under microwave and catalyst without any solvent RIC(OHR2 Cat RICOR2 Microwave Traditionally Organic solvent, KMno Salt pollution 29
29 R1C(OH)R2 R1COR2 Cat. Microwave Varma et al: the activation under microwave and catalyst without any solvent Traditionally Organic solvent; CrO3 , KMnO4 ; Salt pollution (3) The synthesis of carbonyl compounds
Chanter Techniques in Green Chemistry i 5. 1 The performance of Catalysts in Chemical reaction .5.2 Green Chemistry and Catalysis 5.3 The Design of High Efficient and Safe Catalyst ,s5.4 Changing Starting Material for Chemical reaction 65.5 Changing Reagents 5.6 Changing the solvent of Chemical Reaction 5.7 Process Control and Process Intensification
30 ❖ 5.1 The performance of Catalysts in Chemical reaction ❖ 5.2 Green Chemistry and Catalysis ❖ 5.3 The Design of High Efficient and Safe Catalyst ❖ 5.4 Changing Starting Material for Chemical reaction ❖ 5.5 Changing Reagents ❖ 5.6 Changing the solvent of Chemical Reaction ❖ 5.7 Process Control and Process Intensification Chapter 5 Techniques in Green Chemistry