Process for the treatment of effluent from the synthesis of copper phthalocyanine
US4000157A · kind A · utility
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4Claims
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Key dates
| Filing date | Oct 7, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Oct 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B47/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The effluent produced in the production of copper phthalocyanine according to the usual methods, containing by-products of the reaction and copper and molybdenum salts is advantageously purified by bringing it to a pH of between 3 and 9 and separating off the precipitate. The precipitate can be added to the starting components of the copper phthalocyanine production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.