公开(公告)号：US11970441B2

公开(公告)日：2024-04-30

申请号：US16977107

申请日：2018-12-07

申请人： CENTRAL SOUTH UNIVERSITY

发明人： Hong Zhong ,  Xiaoping Huang ,  Shuai Wang ,  Zhanfang Cao

IPC分类号： C07C333/04 ,  B03D1/012 ,  C07C329/14

CPC分类号： C07C333/04 ,  B03D1/012 ,  C07C329/14 ,  B03D2201/02 ,  B03D2203/02

摘要： The invention belongs to the field of mineral flotation collector materials, and particularly discloses a method for preparing thionocarbamate. In the preparation process, xanthate and 2-haloethanol are esterified to obtain O-alkyl-S-hydroxyethyl xanthate, and then O-alkyl-S-hydroxyethyl xanthate and fatty amine are reacted to obtain a mixture of thionocarbamate and 2-mercaptoethanol. The mixture of thionocarbamate and 2-mercaptoethanol is washed with alkali, and the oil phase and water phase are separated. The oil phase and water phase are thionocarbamate and 2-hydroxyethylthiolate, respectively, and 2-mercaptoethanol is obtained by washing with an acid. 2-alkylthioethanol is obtained by reacting 2-hydroxyethanethiolate with alkyl halide, and then with carbon disulfide and alkali to prepare O-alkylthioethyl xanthate. Thionocarbamate, 2-mercaptoethanol and O-alkylthioethyl xanthate prepared by this method possess high yield and high purity. The process is green and environmentally friendly, and is beneficial to the industrialization of co-production.