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أحمد ياسين محمد بجاح حاج أحمد

Professor

أستاذ

كلية العلوم
مبنى 5 ، الدور الثاني ، مكتب 2أ 147
المنشورات
مقال فى مجلة
2020

5) Activated carbon supported Co1.5PW12O40 as efficient catalyst for the production of 1, 2-cyclohexane diol by oxidation of cyclohexene with H2O2 in the presence of CO2

Ahmed, Ramyah Radman, Ahmed Aouissi, Abdullah A. Al-Kahtani, Wafa K. Mekhamer and A. Yacine Badjah Hadj . 2020

Cyclohexene dihydroxylation; carbon dioxide; hydrogen peroxide; polyoxometalates; activated carbon

Vicinal diols are important building blocks for chemicals and pharmaceuticals. Currently, they are
produced from olefins using solvents and harmful oxidants unfavorable from an environmental
and economic point of view. This work lies on the synthesis of 1,2 cyclohexane diol from
cyclohexene by a green route. To achieve it, a series of Cobalt Keggin heteropolyanion salt
(Co1.5PW12O40) loaded on activated carbon with different contents was prepared, characterized
and tested for the synthesis of diol. The effect of various parameters such as reaction
temperature, reaction time and CO2 pressure on the reaction was studied. The effect of reaction
temperature in the range 60-80 °C showed that high temperatures favor diol formation while
low temperatures favor cyclohexanone and a segmented concave Arrhenius graph was
observed. The results of this work showed that oxidation by H2O2 in the presence of CO2 is an
efficient oxidant system for the production of 1.2 cyclohexane diol over carbon activated carbon
supported Co1.5PW12O40. Thanks to CO2 as a soft oxidizing agent, a conversion of 96.9% and a
selectivity in 1, 2 cyclohexane diol of 64.2% was obtained. This simple, safe and environmentally
method could be an alternative green route for vicinal diols production from alkenes.

نوع عمل المنشور
دكتوراه
رقم المجلد
13
رقم الانشاء
4
مجلة/صحيفة
GREEN CHEMISTRY LETTERS AND REVIEWS 2020, VOL. 13, NO. 4, 1–10
الصفحات
1-10
مزيد من المنشورات
publications
بواسطة S.M. Wabaidur, M.S. Obbed, Z.A. Alothman, N.A. Alfaris, A.Y. Badjah-hadj-ahmed, M.R. Siddiqui, J.Z. Altamimi, T.S. Aldayel
2020
publications
بواسطة A. Aqel, S.S. Alzahrani, A. Al-Rifai, M. Alturkey, K. Yusuf, Z.A. ALOthman, A.Y. Badjah-Hadj-Ahmed
2020
publications

Vicinal diols are important building blocks for chemicals and pharmaceuticals. Currently, they are
produced from olefins using solvents and harmful oxidants unfavorable from an environmental…

بواسطة Ramyah Radman, Ahmed Aouissi, Abdullah A. Al-Kahtani, Wafa K. Mekhamer and A. Yacine Badjah Hadj Ahmed
2020