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the production of thymoquinone from thymol and carvacrol

the production of thymoquinone from thymol and carvacrol

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<strong>carvacrol</strong> conversion (%)<br />

16<br />

14<br />

12<br />

10<br />

8<br />

6<br />

4<br />

2<br />

0<br />

0 100 200 300 400 500<br />

time (min.)<br />

Bi(salpn) Y catalyst<br />

Ni(salpn) Y catalyst<br />

Zn(salpn) Y catalyst<br />

Fe(salpn) Y catalyst<br />

Cr(salpn) Y catalyst<br />

Figure 7.8. The percentage <strong>of</strong> <strong>carvacrol</strong> conversion (reaction conditions: <strong>carvacrol</strong>/H2O2<br />

<strong>carvacrol</strong> conversion (%)<br />

35<br />

30<br />

25<br />

20<br />

15<br />

10<br />

5<br />

molar ratio=3, 0.1 g catalyst, 60 ºC)<br />

0<br />

0 100 200 300 400 500<br />

time (min.)<br />

Bi(salpn) Y catalyst<br />

Ni(salpn) Y catalyst<br />

Zn(salpn) Y catalyst<br />

Fe(salpn) Y catalyst<br />

Cr(salpn) Y catalyst<br />

Figure 7.9. The percentage <strong>of</strong> <strong>carvacrol</strong> conversion (reaction conditions: <strong>carvacrol</strong>/H2O2<br />

molar ratio=1, 0.1 g catalyst, 60 ºC)<br />

54

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