Titanium tetrabutoxide

The establishment of the equilibrium is often accelerated by acidic or basic catalysts, for example, by strong acids (p-toluenesulfonic acid), metal oxides (antimony trioxide), Lewis acids (titanium tetrabutoxide, tin acetates or tin oc-toates), weak acid salts of alkali metals or alkaline earth metals (acetates, benzoates), or by alcoholates. 

Carboxy-terminated oligomeric polyester compositions consisting of resorcinol, terephthalic isophthalic acid, diphenyl carbonate, and terephthalic acid catalyzed by titanium tetrabutoxide were prepared by Brunelle et al. (1) and used as thermosetting applications. 

Titanium Butoxide Titanium Tetrabutoxide Titanium Tetrachloride Toluene... 

The titania syntheses were carried out using a 0.5 mol/liter titanium tetra-butoxide solution in isopropanol, which was fed into 250 ml of water. After filtration, the samples were dried and calcined at 673 K for 4 h. The PZT samples were prepared using the indicated stoichiometric amounts of titanium tetrabutoxide and zirconium tetrabutoxide in isopropanol, which were cofed with an aqueous lead acetate solution and precipitated using an aqueous (NH4)2C03 solution directly in the inlet of the high-pressure pump. The addition of the solutions was completed after 20 min. The reaction mixture was then processed for an additional 10 min, giving an overall reaction time of 30 min. 

Prehydrolysis methodu ing tetraethylorthosilicate, titanium tetrabutoxide, and tetrabutylammonium hydroxide. Gel composition SiO2 xTiO2 0.2-TBAOH 20H2O, x - 0.14-0.0055, 443 K, 2-7 days... 

Since the first synthesis of Ti-MCM-41, several Ti-containing mesoporous molecular sieves, such as Ti-HMS, Ti-MCM-48, Ti-MSU-1, and Ti-SBA-15 have been synthesized and characterized. In most instances the syntheses were accomplished using organic precursors, namely, TEOS and titanium tetraethoxide (TEOT) or titanium tetrabutoxide (TBOT) as the Si and Ti sources, respectively. It is easy to form a homogeneous gel using organic precursors. 

The titanium mordenite was synthesized hydrothermally from a system with molar composition IR 1.35 Na20 AI2O3 7.5 Si02 110 H2O 1.2 NaCl, where R represents a template DABCO. Titanium tetrabutoxide was used as a source of titanium. A typical preparation was as follows Boehmite (catapal B, 2g) was slurried in water (5g) and solution of NaOH (1.4g in lOg water) was added to the above slurry. This mixture was then added to a 30% silica sol in water (25g) under stirring. A solution of DABCO in water (1.86g in 5g... 

TITANIUM OXIDE or TITANIUM PEROXIDE (13463-67-7) TiO, Powders or dust reacts with strong acids, strong oxidizers. Violent reaction with aliuniniun, calcium, hydrazine, lithiiun, magnesium, potassium, sodium, zinc, especially at elevated tenperatures. Dust or powder can ignite and then explode in a carbon dioxide atmosphere. On small fire use dry chemical powder or Halon extinguishers. TITANIUM TETRABUTOXIDE (5593-70-4) C,5H3 04Ti Combustible... 

TITANIUM TETRABUTOXIDE (5593-70-4) Combustible liquid (flash point 170°F/77°C cc). Reacts violently with oxidizers. Reacts with water, producing butanol and titanium dioxide. Incompatible with sulfuric acid, nitric acid, caustics, aliphatic amines, isocyanates, boranes. Reacts violently with sodium peroxide, uranium fluoride. 

In a similar approach, titania composites doped with CdSe and CdSe/ZnS NCs were prepared. Here the NCs were mixed with titanium tetrabutoxide in a 2 1 THF/ethanol solvent system, and volume fractions as high as 13% were reported in films that were spin-coated from the sol solutions. While QYs for the CdSe/ZnS-titania sols remained near 10%, smaller values were reported for CdSe NCs that were not initially overcoated with ZnS. In addition, the samples were not very stable, as the PL intensity was observed to decrease in the films almost immediately following processing. 

SiC fibers were produced using polycarbosilanes by Yajima et al. in 1975 [1,2]. Besides SiC fibers, Si-Ti-C-O fibers prepared from a polytitanocarbosi-lane have been obtained by adding a titanium tetrabutoxide to polycarbosilane or polysilane [3]. SiC fibers (Nicalon) and Si-Ti-C-O fibers (Tyranno) are manufactured on an industrial scale. Colorless silicon oxynitride fibers and silicon nitride fibers [4] have been obtained by the nitridation of polycarbosilanes in the author s laboratory. Polymers used for ceramic precursor and the resulting ceramic fibers are listed in Table 1. 

Ko.5Bio.5)Bao.6Ti03 Bismuth nitrate, potassium nitrate, barium acetate, titanium tetrabutoxide... 

The organofucntionalized siHca—titania was synthesized as follows 0.15 mol of TEOS and 0.15 mol of titanium tetrabutoxide were dissolved into 0.1 mol of N-[3-(trimethoxysilyl)propyl]-ethylenediamine. The resulting solution was magnetically stirred by 30 min under nitrogen atmosphere and then aged for 24 h. Hence, to the previously prepared solution 8.0 mol of deionized water was added. The obtained gel was mechanically stirred for 5 h and the resulting powder aged for 48 h. The final product was then washed with deionized water and dried under vacuum at 35°C for 12 h. 

Hydrolysis and polycondensation of titanium tetrabutoxide was also performed in DMF or DMSO. In a typical synthesis, 5 cm of titanium tetrabutoxide were added to 50 cm of DMF or DMSO, under stirring. The resulting solutions were aged for 48 h, and then 1.5 cm of deionized water was added. The resulting powders were aged for 24 h and then washed several times with deionized water and dried under vacuum at room temperature (25°C) for 24 h. 

Polyacetylene films were grown on the walls of a glass reactor using a concentrated Ziegler-Natta catalyst. The catalyst, titanium tetrabutoxide and triethylaluminum, was... 

Guizard et al. [84,85] studied the acid-catalyzed hydrolysis and condensation of titanium alkoxides [i.e., titanium isopropoxide (TIPO) and titanium tetrabutoxide (TTBO)] in polyoxyethylene- )-octylphenyl ether/decane/water microemulsions. The nonionic surfactants used were Triton X-15 (TX-15), TX-35, and TX-45. Dynamic light scattering [85] showed that the hydrodynamic radii of droplets in the TX-35/decane/water system increased from about 2,2 nm in the absence of water to about 4 nm at water/surfactant molar ratio R = 2. The radius remained approximately constant up to about R = 4, above which phase separation occurred. The constant droplet size observed above R = 2 suggests that 2 mol HiO per mole of surfactant is needed for the hydration of the polar groups. 

Hirai et al. [97] used the AOT/isooctane/water system and titanium tetrabutoxide (TTBO). Particle diameters on the order of 3 nm were obtained by dynamic light scattering, a dimension that is smaller than the diameters of the reverse micelles (9-19.3 nm). Particle formation was strongly influenced by the water/surfactant molar ratio (R) and by the alkoxide concentration. The reaction kinetics was followed with UV-Vis absorption spectrophotometry. The absorbance of the reaction system increased monotonically with time for R = 9, whereas it went through a peak (after 400 min) for R = 30. These results were rationalized in terms of differences in availability of reactant water molecules. For... 

Titanium oxide Titanium peroxide. See Titanium dioxide Titanium tetrabutoxide. See Tetrabutyl titanate Titanium tetraisopropoxide Titanium tetraisopropylate Titanium tetra-n-propoxide. See Tetraisopropyl titanate Titanium white. See Titanium dioxide Titanylacetylacetonate. See Titanium acetylacetonate TKPP. SeeTetrapotassium pyrophosphate TIUIA. See Trimellitic anhydride... 

CAS 5593-70-4 EINECS/ELINCS 227-006-8 Synonyms Butyl titanate Orthotitanate Orthotitanic acid tetrabutyl ester TBT Tetrabutyl orthotitanate monomer Tetra-n-butyl titanate Titanium (IV) butoxide Titanium butylate Titanium tetrabutoxide TNBT... 

Titanium sulfate solution. See Titanium sulfate Titanium tetrabutoxide. See Tetrabutyl titanate Titanium tetrachloride CAS 7550-45-0 EINECS/ELINCS 231-441-9 UN 1838 (DOT)... 

Many research groups have published results on catalyst activities and catalysis mechanisms. A wide variety of catalysts have been used in polycondensation of PBS, such as ScfCFjSOjj, ScCNTf jj, titanium tetrabutoxide, titanium(lV) isopropoxide phosphate acid, and titanium and tin composite. It is generally accepted that compounds of antimony, tin, and titanium are the most active catalysts for polycondensation. Among these catalysts, titanium tetrabutoxide (or tetrabutyl titanate) and titanium(IV) isopropoxide are usually used (Takiyama et al. 1994a, b Mochizuki et al. 1997) Yang et al. 2003. 

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