| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of efficiently producing 4,4'-bisphenol sulfone, particularly a method capable of efficiently producing 4,4'-bisphenol sulfone excellent in energy-efficiency as well.SOLUTION: The method comprises reacting a phenol with sulfuric acid under reflux preferably in the presence of a high-boiling aliphatic saturated hydrocarbon and a non-substituted or a mono-substituted aromatic compound. Let the total of the aliphatic saturated hydrocarbon and the aromatic compound be 100 wt.%, the content of the aromatic compound is 2-20 wt.%. |
