... dedicated in the production and sale of Maleic anhydride, Betanaphthol, J acid, NSF, Coal Tar Pitch, Benzene, Anthrancene oil, It is ... three years and will be No. 1.Tangshan Baotie Coal&Chemical Co.,Ltd was established in the year 2005 for the manufacture of ... derivatives from coal tar.Tangshan Xingbao Building Maerials Co., Ltd was established in the year of 2007 for the production ...