Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1995-08-02
1998-08-18
Bell, Mark L.
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
423598, C01B 3320
Patent
active
057955557
ABSTRACT:
A novel micro-meso porous amorphous titanium silicates having a molar composition in terms of the anhydrous oxides of TiO.sub.2 :(5-400) SiO.sub.2, the said titanium silicates being further characterised by (a) the absence of any line corresponding to individual oxides of titanium and silicon in its x-ray diffraction pattern, (b) the presence of interatomic vectors around 1.6-1.7, 2.7-2.8, 4.1-4.2 and 5.0-5.2 .ANG. in the radial electron density distribution, (c) an absorption band around 220 nm in the ultraviolet region corresponding to tetrahedral Si--O--Ti linkage, (d) an absorption band around 960 cm.sup.-1 in infrared region corresponding to tetrahedral Si--O--Ti linkage and (e) a bimodal pore size distribution with the first peak width maximum at a value less than 10 .ANG. and the second peak width maximum between 10 and 100 .ANG., respectively; and a process of preparing said micro-meso porous amorphous titanium silicates wihout any nitrogenated organic base and at a neutral pH of around 7.
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Alive Keshavaraja
Paul Ratnasamy
Vedanayaki Ramaswamy
Venkataraman Ramaswamy Arumugamangalam
Bell Mark L.
Troilo Louis M.
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