HIGHLY PURE 1,5-PENTANEDIOL

摘要

PROBLEM TO BE SOLVED: To produce 1,5-pentanediol free from impurities to lower the polymerization reaction rate in the case of using the diol as a soft segment of polycarbonate diol and polyester polyol or as a chain extender as it is for a raw material of polyurethane, polyester resin, etc.;SOLUTION: The 1,5-pentanediol contains ≤0.1 wt.% each of 1,5-hexanediol and 1,4-dihydroxycyclohexane. The 1,5-pentanediol can be produced by the direct hydrogen reduction of a dicarboxylic acid mixture in the filtrate obtained by the crystallization and separation of adipic acid.;COPYRIGHT: (C)2001,JPO