| http://www.w3.org/ns/prov#value | - A process comprising contacting, in the presence of a catalyst, an alcohol with a carbonyl compound under a condition sufficient to produce a polymer comprising repeat units derived from said alcohol and said carbonyl compound whereinsaid catalyst comprises a titanium-containing compound having the formula of Mx Ti.sup.(III) Ti.sup.(IV)y O.sub.(x+3+4y)/2 wherein M is an alkali metal, Ti.sup.(III)
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