TETRAHYDROFURAN COMPOUND PRODUCTION PROCESS

PROBLEM TO BE SOLVED: To provide an industrially advantageous purification process for a tetrahydrofuran compound in which the purification load can be reduced as well as in which the tetrahydrofuran can become a production raw material for a polyether polyol having an excellent color tone, by converting 2,3-dihydrofuran in the tetrahydrofuran to an irreversible component that can be separated and removed more easily than 2-hydroxy-tetrahydrofuran as well as that does not return to 2,3-dihydrofuran even when concentrated.SOLUTION: Provided is a production process for a polyether polyol in which a 2,3-dihydrofuran-containing raw material tetrahydrofuran compound is subjected to a purification process for a tetrahydrofuran compound by bringing the raw material tetrahydrofuran compound into contact with an acid catalyst to convert the 2,3-dihydrofuran to a high boiling point compound, followed by separation by distillation, and provided is the production process in which, characterized, the water content in the raw material tetrahydrofuran compound is 4900 wtppm or less.SELECTED DRAWING: None 【課題】テトラヒドロフラン中の２，３−ジヒドロフランを、２−ヒドロキシテトラヒドロフランよりも容易に分離除去でき、かつ濃縮されても２，３−ジヒドロフランに戻らない不可逆の成分へ変換することで、精製負荷を低減できるとともに、色相に優れたポリエーテルポリオールの製造原料となる工業的に有利なテトラヒドロフラン化合物の精製方法を提供する。【解決手段】２，３−ジヒドロフランを含有する原料テトラヒドロフラン化合物を酸触媒と接触させて、２，３−ジヒドロフランを高沸点化合物に変換させた後に、蒸留により分離するテトラヒドロフラン化合物の精製方法であって、原料テトラヒドロフラン化合物中の水分量が４９００ｗｔｐｐｍ以下であることを特徴とするポリエーテルポリオールの製造方法。【選択図】 なし