Title:
METHOD FOR CHLORINATING INDANTHRONE BLUE, VIOLANTHRONE OR ISOVIOLANTHRONE
Document Type and Number:
WIPO Patent Application WO/2022/147994
Kind Code:
A1
Abstract:
A method for chlorinating indanthrone blue, violanthrone or isoviolanthrone, comprising: using a Lewis acidic ionic liquid the anion of which is a transition metal halide as a reaction solvent, and using any one among sulfonyl chloride, thionyl chloride or triphosgene as a chlorinating agent; reacting at a chlorination temperature no lower than room temperature and no higher than 120°C for 2-40 hours; and then passing through post-treatment so as to obtain a target product.
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Inventors:
HE XIAOHAN (CN)
Application Number:
PCT/CN2021/105751
Publication Date:
July 14, 2022
Filing Date:
July 12, 2021
Export Citation:
Assignee:
HE XIAOHAN (CN)
International Classes:
C09B5/58; C09B3/32
Foreign References:
| CN112778789A | 2021-05-11 | |||
| CN1111663A | 1995-11-15 | |||
| CN108047017A | 2018-05-18 | |||
| CN107974099A | 2018-05-01 | |||
| CN101270110A | 2008-09-24 | |||
| CN111087833A | 2020-05-01 | |||
| CN104892426A | 2015-09-09 | |||
| CN1865355A | 2006-11-22 | |||
| JPS63291959A | 1988-11-29 | |||
| CN1071777C | 2001-09-26 |
Other References:
See also references of EP 4053220A4
Attorney, Agent or Firm:
BEIJING QIHEQI INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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