... Flake and Briquette 4,Application: It used in production of unsaturated polyester resin, in coating, pharmaceutics, agricultural, surfactant, additive of ... naphthol, bon acid. 2,locationOur company is located in Tangshan which is famous for its iron and steel ... built a maleic anhydride plant in2006, a water reducer plant in 2007, and a dinaphthol plant in 2008. Furthermore, in order to sharpen our ...