... PetroChina, the PetroChinas first-tier supplier of three additives for refinery and a member company of SINOPECs three additives cooperative ... have kept a high market share in the industry.,,,,., ,. For many years, relied on scientific and technological innovation and long ... to s on research and development of the additives and catalysts for refinery.,,,,Nanjing Petro-chemical Co., Ltd. wishes to create ...