Synthesis of acetyl salicylic acid over WO3/ZrO2 solid superacid catalyst
β Scribed by Cun Zhang; Tao Liu; Hong-Juan Wang; Feng Wang; Xiao-Yu Pan
- Book ID
- 113526220
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 638 KB
- Volume
- 174
- Category
- Article
- ISSN
- 1385-8947
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Acetyl salicylic acid, commonly known as Aspirin or Ecotrin, has been synthesized by an eco-friendly route using solid acid catalysts namely nano-crystalline sulfated zirconia, sulfated titania, zeolite H-beta, H-Y, H-ZSM-5 and acid treated K-10 clay. Among all the solid acid catalysts studied, nano
Catalysts in the WO 3 -ZrO 2 system were produced by coprecipitation of aqueous solutions of zirconium oxynitrate and ammonium metatungstate. Samples were characterized by X-ray powder diffraction, thermogravimetry, and refinement of their crystalline structures with the Rietveld method. This coprec
WO 3 /ZrO 2 catalysts were prepared by coprecipitation with 5, 10, 15, 19, and 25 wt.% WO 3 . These catalysts were characterized by XRD, BET, FTIR photoacoustic spectroscopy (pyridine adsorption), and NH 3 -TPD, and tested for the acetylation of anisole with acetic anhydride. The catalytic yields of