Chemicals
| Tue 22 Sep 2026
Beijing, Sept. 21 -- Copper Branch Of Yunnan Tin Co Limited has submitted a patent application for Multi-effect Synthesis Device and Method for Synthesizing Hydrogen Sulfide. Chen Longwen, Cai Bing, Tang Zhenbai, Cai Hui, Qu Chao, Chen Gang, Luo Yongchun, Li Chengxue, Jiang Pengyi, Yang Yong and Zhang Longmei developed the inven..