Santa Barbara amorphous type material

ASA Amorphous silica alumina FCC Fluid catalytic cracking HMCM Hydrogen form of MCM HY Hydrogen containing Y-type zeolite MOR Mordenite MCM Mobil crystalline material REY Rare earth Y SAHA Si02(silica)-Al203 (alumina) with 40 wt% HZSM-5 and 20 wt% ludox SBA Santa Barbara amorphous type material ... [Pg.199]

Besides the classical Si and Al-containing zeolites, there is an ongoing search toward other Lewis acidic zeolites and other microporous materials suitable for this reaction. Taaming et al. made a comparison between beta zeolites substituted with Al, Sn, Zr, and Tl. As with the homogeneous catalysts, this comparison pointed to Sn-based catalysts as extremely selective for this reaction. The authors obtained lactic acid and lactate yields of 90% and >99% at 125 and 80°C, respectively, with an Si Sn ratio of 125 [67]. Since then, numerous reports were published including Sn-montmorillonite [68], mesoporous Sn-MCM-41 (Mobil Composition of Matter) [69,70], Sn-MFI (Mordenite Framework Inverted) [70,71], Sn-deAl-beta [72], Sn-SBA-15 (Santa Barbara Amorphous type material) [70], Sn-MWW (Zeolite Framework Type M-22)... [Pg.383]

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