Preparation and properties of esters of polyorthotitanic acid

摘要: In studies of the synthesis alkyl titanates from anhydrous butyl alcohol and titanium tetrachloride employing ammonia or an amine to neutralize hydrogen chloride formed, Speer has reported uniformly unsuccessful results in repeating examples Nelles' patents on this process. Kraitzer, Winter, others followed process successfully a large excess alcohol. Repetition patent is awkward because ammonium formed reaction produces thick slurry too inconvenient handle. However, if was diluted extracted with hydrocarbon solvent, i.e., toluene, yields 80% were achieved. Furthermore, since it difficult obtain rigorously alcohols, more convenient carry out using inert toluene carbon tetrachloride, as medium along stoichiometric quantity instead medium. The formation nonvolatile residues avoided. If proper water dissolved low-boiling added slowly stirring solution corresponding ester orthotitanic acid, possible esters polyorthotitanic acid controlled average molecular weight. If less than 1 mole per orthotitanate employed, amount cross-linked polymer derived vanishingly little. When butylorthotitanate treated 1.5–2.25 moles titanium, 1.4–1.5 consumed titanium. Water recovered system. 2.25-3 caused complete conversion dioxide. polyorthotitanates soluble benzene, uncross-linked polymers vary appearance very viscous liquids waxy solids. enter into interchange reactions alcohols which one all lower boiling groups may be replaced by higher one. Long-chain organic acids react replace groups.