METHOD FOR CHLORINATING INDANTHRONE BLUE, VIOLANTHRONE OR ISOVIOLANTHRONE

    公开(公告)号:EP4053220A1

    公开(公告)日:2022-09-07

    申请号:EP21856956.4

    申请日:2021-07-12

    申请人: He, Xiaohan

    发明人: He, Xiaohan

    IPC分类号: C09B5/58 C09B3/32

    摘要: A method for chlorinating blue anthrone, violanthrone or isoviolanthrone is provided. Reaction is carried out with a chlorinating agent (any one of sulfonyl chloride, thionyl chloride and triphosgene) in a reaction solvent (a Lewis acid ionic liquid with anions being of a transition metal halide) for 2 h to 40 h at a chlorination temperature not lower than room temperature and not higher than 120 °C; and then the reaction product is subjected to post-treatment to obtain a target product. The present disclosure cuts off a generation route of harmful substances such as dioxins and their derivatives from the source. There are no dioxins or similar substances generated in the product, and the reaction has high atomic utilization rate and low energy consumption, which fills the gap in the field of chemical technologies at home and abroad. The quantity of the product prepared by using the technical solution of the present disclosure, without using nitrobenzene, chlorobenzene and other highly toxic solvents, can reach the international advanced level, or even better, the obtained chlorides of violanthrone, blue anthrone and isoflavone are brighter in color.