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 7.6. Conversion <strong>and</strong> yield in <strong>the</strong> oxidation <strong>of</strong> <strong>carvacrol</strong> reactions a<br />
Catalyst<br />
Carvacrol/H2O2<br />
(Molar ratio)<br />
Carvacrol<br />
Conversion b<br />
(%)<br />
Thymoquinone<br />
Yield b<br />
Cr(salpn)-NaY 3 14.2 13.0<br />
Fe(salpn)-NaY 3 12.7 11.6<br />
Bi(salpn)-NaY 3 3.2 3.2<br />
Zn(salpn)-NaY 3 11.0 11.0<br />
Ni(salpn)-NaY 3 7.9 7.9<br />
Cr(salpn)-NaY 1 23.5 17.6<br />
Fe(salpn)-NaY 1 27.6 22.0<br />
Bi(salpn)-NaY 1 4.9 4.9<br />
Zn(salpn)-NaY 1 6.7 6.7<br />
Ni(salpn)-NaY 1 5.9 5.9<br />
NaY<br />
1<br />
No detectable<br />
activity c<br />
a Reaction conditions: Acetonitrile as solvent, 60 ºC, 5 hours, 0.1g catalyst<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 100<br />
in<br />
c NaY showed no catalytic activity towards oxidation <strong>of</strong> <strong>carvacrol</strong><br />
%<br />
53
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