Process for producing highly chlorinated copper phthalocyanine
US4218376A · kind A · utility
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8Claims
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Key dates
| Filing date | Nov 21, 1978 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | Nov 21, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B47/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Highly chlorinated copper phthalocyanine is produced by charging chlorine under an elevated pressure of 1 to 20 Kg/cm.sup.2 (gauge) into a solution of a copper phthalocyanine in the presence of pyrosulfuryl chloride and a catalyst of sulfur or sulfur chloride. Pyrosulfuryl chloride can be formed by a reaction of chlorosulfonic acid with chlorine and sulfur or sulfur chloride under an elevated pressure. An auxiliary catalyst of iodine, iodine chloride or a metal chloride can be incorporated to improve the chlorination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.