| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an industrially advantageous manufacturing method for tetrahydrofuran comprising manufacturing tetrahydrofuran from a 1,4-butanediol-containing liquid as a raw material that permits avoidance of deposition of solid matter to stably attain high productivity. <P>SOLUTION: The manufacturing method for tetrahydrofuran comprises feeding, as a raw material, 1,4-butanediol containing 0.01-0.50 wt.% of 2-(4-hydroxybutoxy)-tetrahydrofuran into a reactor and carrying out a dehydrative cyclization reaction in the presence of an acid catalyst having a pKa value of 4 or lower to obtain tetrahydrofuran as a product, where the viscosity of the solution in the reactor at a viscosity measurement temperature of 25°C is at least 50 mPa sec and at most 1,300 mPa sec. <P>COPYRIGHT: (C)2013,JPO&INPIT |
