Titanium butoxide

Dimethyl terephthalate, Titanium butoxide See Dimethyl terephthalate Ethylene glycol, Titanium butoxide... 

Later, Thangaraj et al. (275,281) developed a novel, improved route (prehydrolysis method) for the preparation of good quality TS-1 samples. In this method the silica source (tetraethyl orthosilicate TEOS) in Ao-propanol was first hydrolyzed with 20% aqueous TPAOH solution prior to the (dropwise) addition of titanium butoxide in dry iso-propanol under vigorous stirring. Crystallization was done statically at 443 K for 1-5 days and the solid was calcined at 823 K for 10 h. The TS-1 samples thus obtained exhibited high catalytic activity in hydroxylation reactions. 

After reaching the desired DP, 40-50 % of the oligomeric melt is transferred to the polymerization vessel. Titanium butoxide (50-150 ppm) or dibutyl tin oxide catalyst (100-250 ppm), or some combinations of the two catalysts, is added to catalyze polymerization at 260-275 °C. A vacuum of <0.15 kPa is applied to remove the condensed water so as to drive the reaction until the polymer reaches an intrinsic viscosity (IV) of 0.7-0.9 dL/g. 

Tetrakis(ethylthio)uranium, 3096 Titanium butoxide, 3730 Titanium(III) methoxide, 1317 Titanium tetraisopropoxide, 3579 Tungsten hexamethoxide, 2604 Zinc ethoxide, 1704... 

However, for modern electronic circuits, it is important to have a product of controlled grain size and the precursor method is one way to achieve this. (Another way is the sol-gel method which has also been applied to this material.) The precursor used is an oxalate. The first step in the preparation is to prepare an oxo-oxalate of titanium. Excess oxalic acid solution is added to titanium butoxide which initially hydrolyses to give a precipitate which then redissolves in the excess oxalic acid. 

Titanium Butoxide Titanium Tetrabutoxide Titanium Tetrachloride Toluene... 

Fig. 3.3 TEM photograph of HyCOM Ti02 synthesized from titanium butoxide ir. toluene at 300°C.

Rate ofhydrolysis depends primarily on the size and structure of the alkoxide group, — for example, it decreases in the series titanium butoxide tertiary >... 

Titanium azide trichloride, 4141 Titanium butoxide, 3724 Titanium carbide, 0558 Titanium diazide dibromide, 0272 Titanium dibromide, 0283 Titanium dihydride, 4484 Titanium diiodide, 4625... 

Tetrakis(ethylthio)uranium, 3090 Titanium butoxide, 3724 Titanium tetraisopropoxide, 3573 Titanium(III) methoxide, 1313 Tungsten hexamethoxide, 2600 Zinc ethoxide, 1698... 

It is difficult to make water-soluble peptides form complexes with titanium alkoxide, because they are not soluble in organic solvents. Therefore, such templates cannot be imprinted by the complexation approach. Instead, they could be imprinted in Ti02-gel films by the alternate adsorption approach with Ti(0 Bu)4. Figure 6.24a shows a plot of alternate layer-by-layer assembly of 100 mM titanium butoxide (3 min adsorption in toluene/ethanol) and 10 mM glycyl-L-tyrosine (Gly-L-Tyr, 10 min adsorption in water). The template molecule was removed by treatment with 10 mM aqueous sodium hydroxide, as... 

Microemulsion-Mediated Hydrothermal Synthesis Triton X-100 was served as the surfactant, n-hexanol as co-surfactant, cyclohexane as the continuous oil phase, and a solution of titanium -butoxide dissolved in an acid (HCl or HNO3) was employed as the dispersed aqueous phase. The concentration of hydrochloric acid or nitric acid ranged from 0.5 M to 2.0 M. A transparent feedstock of microemulsions was charged into a Teflon-lined stainless autoclave and hydrothermal reaction was... 

Synthesis of Mesoporous Titania aqueous solution of an alkylamine and alcohol of titanium butoxide was mixed under magnetic stirring and aged at a certain temperature. A yellowish powder was obtained. 

Figure 7a shows the powder XRD pattern of the as-prepared mesostructured titania from titanium butoxide. The mesostructure was collapsed at 400 °C for 5 h, indicated by powder XRD diffraction and adsorption properties. 

---