the production of thymoquinone from thymol and carvacrol
the production of thymoquinone from thymol and carvacrol
the production of thymoquinone from thymol and carvacrol
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Table 7.8. Oxidation <strong>of</strong> <strong>carvacrol</strong> by Cr (salpn)- NaY catalyst under different reaction<br />
catalyst<br />
amount (g)<br />
conditions a<br />
effect <strong>of</strong> catalyst weight<br />
temperature<br />
( o C)<br />
<strong>carvacrol</strong> / (%30)H2O2<br />
molar ratio<br />
Conversion b<br />
(%)<br />
TQ yield b<br />
0.05 50 2 7.4 7.4<br />
0.13 50 2 18.0 16.0<br />
0.2 50 2 21.6 20.7<br />
effect <strong>of</strong> temperature<br />
0.13 25 2 no conversion -<br />
0.13 40 2 6.2 6.2<br />
0.13 50 2 18.0 16.0<br />
0.13 60 2 19.2 15.0<br />
effect <strong>of</strong> H2O2 amount<br />
0.13 50 3 3.7 3.7<br />
0.13 50 2 18.0 16.0<br />
0.13 50 1 27.0 23.0<br />
a Reaction conditions: Acetonitrile as solvent, 5 hours reaction time, Cr (salpn)-NaY<br />
catalyst was used<br />
b Conversion, yield were determined by HPLC. Conversion <strong>of</strong> reactant can be calculated<br />
(reactant) in − (reactant) out<br />
as x100<br />
, Yield for a specific product can be calculated as<br />
(reactant)<br />
product<br />
(reactant) in<br />
x<br />
100<br />
in<br />
(%)<br />
63
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