Process for producing dianthraquinone-N,N'-dihydrazine and its chlorination product
US4628091A · kind A · utility
2Cited by
1References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 13, 1984 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Jun 13, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B5/48
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for producing dianthraquinone-N,N'-dihydrazine or its chlorination product, which comprises condensing 1-aminoanthraquinone at an elevated temperature in the presence of 1,3-dimethyl-2-imidazolidinone using an oxidizing agent and an alkaline condensing agent, and subjecting the resulting condensation product to a treatment known per se.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.