Patent ID: 11939475
Assignee: nan
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 8:
9. The method for chlorinating blue anthrone, violanthrone or isoviolanthrone according to claim 8, wherein
specific chlorination steps are as follows:
step 1: dissolution: dissolving the reaction substrate in the Lewis acid ionic liquid at a dissolution temperature of 30° C. to 150° C., holding the dissolution temperature and stirring for not less than 3 h to obtain an initial reaction solution;
step 2: chlorination: adding the chlorinating agent dropwise to the initial reaction solution, wherein a temperature of the initial reaction solution is controlled to be not higher than 60° C. during addition of the chlorinating agent; and then holding the chlorination temperature and stirring for 2 h to 40 h to obtain an end-point reaction solution; and
step 3: post-treatment: hydrolyzing the end-point reaction solution for 10 min to 30 min, and then carrying out suction filtration, washing, and drying to obtain a target chlorination product.