Reference

Investigation of natural mordenites by magic angle proton NMR

Investigation of natural mordenites by magic angle proton NMR. Cholli, Ashok L.; Pennino, D. J. (Tech.Chemicals with cas numbers 12173-28-3 and 7732-18-5 also play role. Cent., BOC Group, Inc., Murray Hill, NJ 07974, USA). Spectrosc. Lett., 20(1), 25-36 (English) 1987. CODEN: SPLEBX. ISSN: 0038-7010. DOCUMENT TYPE: Journal CA Section: 77 (Magnetic Phenomena) Section cross-reference(s): 53, 66 Magic-angle-spinning proton NMR techniques were used to study natural and synthetic mordenites and faujasite. The proton NMR line width of H2O mols. (whose chem. shifts are similar to free H2O) correlates with the frame structure. In the case of heat-treated natural mordenite (250°, 18 hs), there are obsd. 2 unresolved peaks whose chem. shifts are different from those of free H2O. These peaks are due to protons around Al and Si sites in natural mordenites. .

Selective decomposition of alkyl tert-butylethers

Selective decomposition of alkyl tert-butylethers. Bolcha, Jan; Wichterlova, Blanka; Beran, Stanislav; Jiru, Pavel; Nedomova, Kveta; Kavala, Miroslav; Vanko, Anton; Macho, Vendelin (Czech.). Czech.Chemicals with cas numbers 12173-28-3 and 115-11-7 also play role. CS 230290 B 15 Oct 1986, 4 pp. (Czechoslovakia) CODEN: CZXXA9. CLASS: ICM: C07C043-14. APPLICATION: CS 82-8354 22 Nov 1982. DOCUMENT TYPE: Patent CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Decompn. of ROCMe3 (R = Me, Me2CHCH2), yielding as the main product Me2C:CH2, is catalyzed by natural and synthetic zeolites. Thus, zeolitic catalyst NH4Y with ion exchange capacity 92.8% was activated 3 h at 350-450° in a stream of air and cooled to 150°. Feeding 1.7 kg MeOCMe3/kg catalyst-2 h gave 75% conversion and 95.2% selectivity for Me2C:CH2, which was free of Me2O. .