| 摘要 |
<p>A process is described for purifying a carbonyl-containing 1,3-propanediol composition, the process comprising: (a) forming a solution of said 1,3-propanediol composition in an acidic aqueous medium; (b) adding a sufficient amount of a base to the aqueous medium to form a basic solution having a pH greater than 7; (c) heating the basic solution under conditions effective to distil a major portion of the water therefrom; and (d) heating the remaining basic solution under conditions effective to distil a major portion of the PDO therefrom, to provide a 1,3-propanediol composition having a lower carbonyl content than the starting carbonyl-containing 1,3-propanediol composition. The process of the invention provides a purified 1,3-propanediol which can be used as a starting material for a low-colour polyester.</p> |
