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    1. Zhejiang Dragon Chemical Group Company

      Strong Technology

      Sulfonation:

      Chloro-Sulfonation:

      Nitration:

      Nitrosation:

      Acetylation:

      Reduction:

      Hydrogenation (Catalyst:Ni,Pd/C,Pd/Al2O3,Rh/C):

      High Technology/Cost Reduction:

      Halogenation:
       To top
      α-H halogenation:

      Condensation:

      Amination:

      Hydrolysis:

      Hydrolysis Carboxylation:

      Saponification:To top

      Esterfication:

      Desulfonation/Desulfonamide:

      Oxidization:

      Alkyloxydization:

      N-Alkylation:

      Sulfuration:

      CO Insertion:

      Friedel-Crafts:

      Addition Cyclization:

      Ring-opening addition:

      Phosgenation/Triphosgenation:
      To top
      Diazo-coupling:

      Others:
      Recrystallization, Decrease Metal Content Of Product
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