کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
58448 | 47152 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rare earth triflate catalysts in the synthesis of Vitamin E and its derivatives
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
Vitamin E is known as the most important fat-soluble antioxidant in biological systems. The scale for commercially produced (all-rac)-α-tocopherol reaches over 25,000 tonnes per year. The known processes for the synthesis of α-tocopherol suffer from disadvantages like formation of by-products and waste-water problem. To overcome these drawbacks, new types of catalysts have been developed. These are rare earth metal triflates, e.g. Bi(OTf)3, Ga(OTf)3, Tm(OTf)3 or Hf(OTf)4. This new approach to Vitamin E or derivatives thereof has several advantages, based on high yields (above 94%) and selectivities.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 121, Issues 1–2, 15 March 2007, Pages 65–70
Journal: Catalysis Today - Volume 121, Issues 1–2, 15 March 2007, Pages 65–70
نویسندگان
Werner Bonrath, Claus Dittel, Lisa Giraudi, Thomas Netscher, Thomas Pabst,