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    • 10. 发明申请
    • Processes for the preparation of diphenylsulfone compounds
    • 二苯砜化合物的制备方法
    • US20050065377A1
    • 2005-03-24
    • US10950889
    • 2004-09-27
    • Kiyoshi KatsuuraTomoya HidakaYutaka TakashinaYasuo Ohnuki
    • Kiyoshi KatsuuraTomoya HidakaYutaka TakashinaYasuo Ohnuki
    • C07C315/06C07C317/22C07C317/16
    • C07C315/04C07C315/06C07C317/22
    • The present invention is to provide methods for producing highly pure 4,4′-dihydroxydiphenyl sulfone monoethers advantageously in industrial production. In a process for producing a compound represented by Formula (I) (wherein, R1 and R2 are each independently halogen, alkyl having 1 to 8 carbons or alkenyl having 2 to 8 carbons; m and n are each independently 0 or an integer of 1 to 4; and R3 is alkyl having 1 to 8 carbons, alkenyl having 2 to 8 carbons, cycloalkyl having 3 to 8 carbons or optionally substituted aralkyl), (1) a pH adjustment is carried out twice or more in the purification process, (2) an excessive amount of alkyl halide used is removed, (3) a solvent, such as water, containing 0.05 ppm or less of iron components is used, (4) tanks with corrosion-resistant layers over the inner walls are used, (6) a chelating agent is added, and (7) a means of drying with mechanical stir is applied.
    • 本发明提供在工业生产中有利地生产高纯度4,4'-二羟基二苯砜单醚的方法。 在制备由式(I)表示的化合物(其中R 1和R 2各自独立地为卤素,具有1至8个碳的烷基或具有2至8个碳的烯基的化合物的方法中,m和n各自独立地为 0或1〜4的整数,R 3为碳数为1〜8的烷基,碳原子数为2〜8的烯基,碳原子数为3〜8的烷基或任意取代的芳烷基),(1)进行pH调整 两次以上,(2)过量使用的烷基卤被除去,(3)使用含有0.05ppm以下铁成分的溶剂,如水,(4)耐腐蚀罐 使用内壁上的层,(6)加入螯合剂,和(7)应用机械搅拌干燥的方法。