2-Bromo-9,9′-spirobi[9H-xanthene]

Zhongwei National Engineering Research Center For Coking Technology Co., Ltd. was established in October 1998. It is a central state-owned enterprise located in Tiexi District, Anshan City, Liaoning Province, with a registered capital of 72.8382 million yuan. It is a fourth-level subsidiary of China Baowu Steel Group Co., Ltd., a third-level subsidiary of China Sinosteel Corporation, and a wholly-owned subsidiary of Sinosteel Tianyuan Co., Ltd. It is a national high-tech enterprise and a "Little Giant" enterprise in Liaoning Province specializing in "Specialized, Refined, Unique and Innovative" products. Its main business is divided into two parts: the technical development and industrialization of organic chemical new materials (including small-scale customized R&D, pilot-scale amplification, large-scale production, and sales), and the research and development and manufacturing of intelligent instruments and equipment for coal and coke detection (including test coke ovens, coal and coke detection equipment, and overall laboratory solutions). Among them, the main products of organic chemical new materials include OLED intermediates (such as fluorene, carbazole, xanthene, furan, thiophene, aniline, naphthalene, anthracene, chrysene, BH intermediates, silane, B-N intermediates, etc.) and customized new structure products, as well as optical resin intermediates (such as 9-fluorenone, BAF, BCF, BPF, BPGF, BPEF, etc.). Zhongwei Company is a global large-scale producer of 9-fluorenone in the chemical industry, with the largest market share in China. It is irreplaceable in the field of test coke ovens in metallurgy.